EP0118717A1 - Sintered material for electrical contacts and its method of manufacture - Google Patents
Sintered material for electrical contacts and its method of manufacture Download PDFInfo
- Publication number
- EP0118717A1 EP0118717A1 EP84101010A EP84101010A EP0118717A1 EP 0118717 A1 EP0118717 A1 EP 0118717A1 EP 84101010 A EP84101010 A EP 84101010A EP 84101010 A EP84101010 A EP 84101010A EP 0118717 A1 EP0118717 A1 EP 0118717A1
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- EP
- European Patent Office
- Prior art keywords
- oxide
- silver
- mass
- metal oxide
- composite material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000463 material Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052709 silver Inorganic materials 0.000 claims abstract description 23
- 239000004332 silver Substances 0.000 claims abstract description 23
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 19
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 19
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 12
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 229910001887 tin oxide Inorganic materials 0.000 claims description 14
- 239000005751 Copper oxide Substances 0.000 claims description 11
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 11
- 229910000431 copper oxide Inorganic materials 0.000 claims description 11
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 5
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 5
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 4
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 4
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 5
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/023—Composite material having a noble metal as the basic material
- H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
- H01H1/02372—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te
- H01H1/02376—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te containing as major component SnO2
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0021—Matrix based on noble metals, Cu or alloys thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9265—Special properties
- Y10S428/929—Electrical contact feature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/1216—Continuous interengaged phases of plural metals, or oriented fiber containing
- Y10T428/12174—Mo or W containing
Definitions
- the invention relates to a sintered composite material for electrical contacts made of silver, tin oxide, bismuth oxide, copper oxide and process for its production.
- AgCdO has proven itself very well for the production of electrical contact pieces for a large number of applications.
- the CdO has been classified as a toxic material due to its environmental impact. Therefore, an attempt is made to replace Cd0 with another metal oxide.
- Tin oxide (SnO 2 ) has been shown to be a suitable replacement for cadmium oxide (CdO).
- AgSn0 2 contact materials do not yet have optimal values in all functionally important properties. For example, AgSn0 2 contact materials have a more firmly adhering oxide layer than AgCdO contact materials.
- a material for electrical contacts made of silver, tin oxide and another metal oxide is known from European patent specification 0 024 349. This known contact material contains tin oxide, tungsten oxide in a predetermined specific composition and silver.
- the invention has for its object to improve the known CdO-free silver contact pieces in such a way that the optimization of the contact properties with regard to arcing in the arc, low welding force and low contact resistance enables.
- the solution consists of a sintered composite material made of silver with tin oxide, bismuth oxide and copper oxide (A g SnO 2 Bi 2 0 3 Cu0) and at least one further metal oxide additive that sublimes below the melting temperature of the silver and the tin oxide, bismuth oxide and copper oxide globularly in silver in microstructures up to a maximum of 200 ⁇ m 0 ⁇ is excreted and the metal oxide addition is distributed in the surfaces of the border areas of these silver areas.
- a sintered composite material made of silver with tin oxide, bismuth oxide and copper oxide (A g SnO 2 Bi 2 0 3 Cu0) and at least one further metal oxide additive that sublimes below the melting temperature of the silver and the tin oxide, bismuth oxide and copper oxide globularly in silver in microstructures up to a maximum of 200 ⁇ m 0 ⁇ is excreted and the metal oxide addition is distributed in the surfaces of the border areas of these silver areas.
- the mean particle sizes of the tin oxide, bismuth oxide and copper oxide precipitations in the silver regions are between 0.1 and 5 ⁇ m, in particular between 0.1 ⁇ m and 3 ⁇ m.
- the tin oxide content between 6 and 15% by mass, the bismuth oxide content between 0.2 and 2% by mass, the copper oxide content between 0.2 and 2% by mass and the proportion of subliming metal oxide addition between 0.2 and 2% by mass is.
- Molybdenum oxide (Mo03) with a proportion of 0.5% by mass, or tungsten oxide (WO 3 ), with a proportion of 0.8% by mass or tungsten oxide (WO 3 ) with a proportion of 0 has been found to be particularly suitable for the sublimating metal oxide additive , 5% mass content and molybdenum oxide (MoO 3 ) with a proportion of 0.2% mass content.
- a powder of particle size ⁇ 200 ⁇ m is produced from an AgSnBiCu alloy with 7.7% tin (Sn), 1% bismuth (Bi) and 1% copper (Cu).
- a suitable method for this is, for example, pressure atomization of the melt of this alloy.
- the alloy powder obtained is completely internally oxidized, a composite powder of AgSnO 2 Bi 2 O 3 CuO having the corresponding composition being obtained.
- the internal oxidation is carried out in air, the annealing treatment being started at 500 ° C and after an hour being held at 800 ° C for the same time.
- the composite powder is mixed with 0.8% by weight of tungsten oxide (W0 3 ) in a stirred ball mill under acetone for one hour and the W0 3 is distributed over the surface of the composite powder particles.
- a powder of particle size ⁇ 200 ⁇ m is produced from an AgSnBiCu alloy with 7.7% tin (Sn), 1% bismuth (Bi) and 1% copper (Cu) by weight, as in Example 1, by pressure atomization of the molten alloy.
- An internal oxidation of the alloy powder under the conditions given in Example 1 gives a completely internally oxidized composite powder AgSnO 2 Bi 2 O 3 CuO.
- the composite powder is ground with 0.4% by mass of tungsten oxide powder (WO) and 0.2% by mass of molybdenum oxide powder (Mo03) in an agitator ball mill under acetone for 1 h and the oxide additives are evenly distributed on the surface of the composite powder particles.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Contacts (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Switches (AREA)
- Conductive Materials (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Sinterverbundwerkstoff für elektrische Kontakte aus Silber, Zinnoxid, Wismutoxid, Kupferoxid und Verfahren zu seiner Herstellung.The invention relates to a sintered composite material for electrical contacts made of silver, tin oxide, bismuth oxide, copper oxide and process for its production.
Für eine Vielzahl von Anwendungsfällen hat sich für das Herstellen von elektrischen Kontaktstücken AgCdO sehr gut bewährt. Das CdO ist wegen seiner Umweltbelastung als toxischer Werkstoff eingestuft worden. Daher wird versucht, Cd0 durch ein anderes Metalloxid zu ersetzen. Es hat sich gezeigt, daß Zinnoxid (SnO2) ein geeigneter Ersatz für Cadmiumoxid (CdO) ist. Es hat sich aber auch gezeigt, daß AgSn02-Kontaktwerkstoffe noch nicht in allen funktionswichtigen Eigenschaften optimale Werte aufweisen. So tritt z.B. bei AgSn02-Kontaktwerkstoffen gegenüber AgCdO-Kontaktwerkstoffen eine fester haftende Oxidschicht auf. Durch die europäische Patentschrift 0 024 349 ist ein Werkstoff für elektrische Kontakte aus Silber, Zinnoxid und einem weiteren Metalloxid bekannt. Dieser bekannte Kontaktwerkstoff enthält Zinnoxid, Wolframoxid in einer vorgegebenen bestimmten Zusammensetzung und Silber.AgCdO has proven itself very well for the production of electrical contact pieces for a large number of applications. The CdO has been classified as a toxic material due to its environmental impact. Therefore, an attempt is made to replace Cd0 with another metal oxide. Tin oxide (SnO 2 ) has been shown to be a suitable replacement for cadmium oxide (CdO). However, it has also been shown that AgSn0 2 contact materials do not yet have optimal values in all functionally important properties. For example, AgSn0 2 contact materials have a more firmly adhering oxide layer than AgCdO contact materials. A material for electrical contacts made of silver, tin oxide and another metal oxide is known from European patent specification 0 024 349. This known contact material contains tin oxide, tungsten oxide in a predetermined specific composition and silver.
Der Erfindung liegt die Aufgabe zugrunde, die bekannten CdO-freien Silberkontaktstücke dahingehend zu verbessern, daß die Optimierung der Kontakteigenschaften hinsichtlich Abbrand im Lichtbogen, kleine Schweißkraft und kleinen Kontaktwiderstand ermöglicht.The invention has for its object to improve the known CdO-free silver contact pieces in such a way that the optimization of the contact properties with regard to arcing in the arc, low welding force and low contact resistance enables.
Die Lösung besteht in einem Sinterverbundwerkstoff aus Silber mit Zinnoxid, Wismutoxid und Kupferoxid (AgSnO2Bi203Cu0) und mindestens einem weiteren Metalloxidzusatz, der unter der Schmelztemperatur des Silbers sublimiert und das Zinnoxid, das Wismutoxid und das Kupferoxid globular im Silber in Gefügebereichen bis höchstens 200 µm 0̸ ausgeschieden ist und der Metalloxidzusatz in den Oberflächen der Grenzbereiche dieser Silberbereiche verteilt ist.The solution consists of a sintered composite material made of silver with tin oxide, bismuth oxide and copper oxide (A g SnO 2 Bi 2 0 3 Cu0) and at least one further metal oxide additive that sublimes below the melting temperature of the silver and the tin oxide, bismuth oxide and copper oxide globularly in silver in microstructures up to a maximum of 200 µm 0̸ is excreted and the metal oxide addition is distributed in the surfaces of the border areas of these silver areas.
Es hat sich besonders bewährt, wenn die mittleren Teilchengrößen der Zinnoxid-, Wismutoxid- und Kupferoxidausscheidungen in den Silberbereichen zwischen 0,1 und 5 µm insbesondere zwischen 0,1 µm und 3 µm betragen.It has proven particularly useful if the mean particle sizes of the tin oxide, bismuth oxide and copper oxide precipitations in the silver regions are between 0.1 and 5 μm, in particular between 0.1 μm and 3 μm.
Weiterhin ist es vorteilhaft, daß der Zinnoxidanteil zwischen 6 und 15 % Massengehalt, der Wismutoxidanteil zwischen 0,2 und 2 % Massengehalt, der Kupferoxidanteil zwischen 0,2 und 2 % Massengehalt und der Anteil an sublimierenden Metalloxidzusatz zwischen 0,2 und 2 % Massengehalt beträgt.It is also advantageous that the tin oxide content between 6 and 15% by mass, the bismuth oxide content between 0.2 and 2% by mass, the copper oxide content between 0.2 and 2% by mass and the proportion of subliming metal oxide addition between 0.2 and 2% by mass is.
Als besonders geeignet hat sich für den sublimierenden Metalloxidzusatz Molybdänoxid (Mo03) mit einem Anteil von 0,5 % Massengehalt, oder Wolframoxid (WO3), mit einem Anteil von 0,8 % Massengehalt oder Wolframoxid (WO3) mit einem Anteil von 0,5 % Massengehalt und Molybdänoxid (MoO3) mit einem Anteil von 0,2 % Massengehalt erwiesen.Molybdenum oxide (Mo03) with a proportion of 0.5% by mass, or tungsten oxide (WO 3 ), with a proportion of 0.8% by mass or tungsten oxide (WO 3 ) with a proportion of 0 has been found to be particularly suitable for the sublimating metal oxide additive , 5% mass content and molybdenum oxide (MoO 3 ) with a proportion of 0.2% mass content.
Bei dem Kontaktwerkstoff gemäß dem Kennzeichen des Patentanspruches 1 wird eine Optimierung durch die Silberbereiche mit den globularen Oxidausscheidungen von Zinnoxid, Wismutoxid und Kupferoxid mit sehr günstigen Lichtbogeneigenschaften und den an der Oberfläche dieser Silberbereiche liegenden sublimierenden Metalloxiden erreicht, die bei Lichtbogenbelastungen zu kleinen Silberinseln führen, aus denen die Metalloxide unter der Silberschmelztemperatur sublimieren und dadurch eine geschlossene Deckschicht an Oxiden vermeiden. Dadurch wird eine deutliche Erniedrigung des Kontaktwiderstandes erzielt, ohne daß die Schweißkraft erhöht wird. An zwei Ausführungsbeispielen wird die Erfindung näher erläutert.In the case of the contact material according to the characterizing part of patent claim 1, an optimization through the silver areas with the globular oxide precipitates of tin oxide, bismuth oxide and copper oxide is carried out with very favorable results L layer sheet properties and reaches the ilberbereiche the surface of this S lying sublimating metal oxides, which result in arcing loads to small silver islands from which the metal oxides sublime under the silver melting temperature and thereby avoid a closed top layer of oxides. This results in a significant reduction in the contact resistance without increasing the welding force. The invention is explained in more detail using two exemplary embodiments.
Aus einer AgSnBiCu-Legierung mit 7,7 % Massengehalt Zinn (Sn),1 % Massengehalt Wismut (Bi) und 1 % Massengehalt Kupfer (Cu) wird ein Pulver der Teilchengröße<200 µm hergestellt. Ein geeignetes Verfahren dafür ist z.B. die Druckverdüsung der Schmelze dieser Legierung. Das erhaltene Legierungspulver wird vollständig inneroxidiert, wobei ein Verbundpulver AgSnO2Bi2O3CuO entsprechender Zusammensetzung erhalten wird. Die innere Oxidation wird an Luft vorgenommen, wobei die Glühbehandlung bei 500 °C begonnen wird und nach einer Stunde während der gleichen Zeit bei 800 °C gehalten wird. Das Verbundpulver wird mit 0,8 % Massengehalt Wolframoxid (W03) in einer Rührwerkskugelmühle unter Azeton während einer Stunde gemischt und dabei das W03 auf der Oberfläche der Verbundpulverteilchen verteilt.A powder of particle size <200 µm is produced from an AgSnBiCu alloy with 7.7% tin (Sn), 1% bismuth (Bi) and 1% copper (Cu). A suitable method for this is, for example, pressure atomization of the melt of this alloy. The alloy powder obtained is completely internally oxidized, a composite powder of AgSnO 2 Bi 2 O 3 CuO having the corresponding composition being obtained. The internal oxidation is carried out in air, the annealing treatment being started at 500 ° C and after an hour being held at 800 ° C for the same time. The composite powder is mixed with 0.8% by weight of tungsten oxide (W0 3 ) in a stirred ball mill under acetone for one hour and the W0 3 is distributed over the surface of the composite powder particles.
Nach Trocknen dieser Pulvermischung wird durch Pressen, Sintern und Warmnachverdichten ein Formkörper hergestellt, dessen Restporosität bei < 1,5 % liegt. Die Kontakteigenschaften wie Abbrand im Lichtbogen, Schweißkraft und Kontaktwiderstand wurden unter in der Literatur beschriebenen Bedingungen auf einem Prüfschalter gemessen und mit einer sehr guten AgCdO-Qualität verglichen. Die Abbrandwerte liegen um 25 % niedriger, womit eine entsprechende Verbesserung der Lebensdauer erreicht wird. Dadurch kann eine entsprechende Silbereinsparung durch Verkleinerung des Kontaktstückvolumens erzielt werden. Die Schweißkraftwerte lagen im gleichen Bereich wie bei AgCd012 und auch der Kontaktwiderstand lag im gleichen Schwankungsbereich.After this powder mixture has dried, a shaped body is produced by pressing, sintering and hot post-compression, the residual porosity of which is <1.5%. The K ontakteigenschaften as burn-in arc welding force and contact resistance were measured as described in the literature conditions on a test switch and with a very good quality AgCdO ver like. The burn-up values are 25% lower, which leads to a corresponding improvement in the service life. A corresponding silver saving can be achieved by reducing the contact piece volume. The welding force values were in the same range as for AgCd012 and the contact resistance was in the same fluctuation range.
Aus einer AgSnBiCu-Legierung mit 7,7 % Massengehalt Zinn (Sn), 1 % Massengehalt Wismut (Bi) und 1 % Massengehalt Kupfer (Cu) wird wie bei Beispiel 1 ein Pulver der Teilchengröße < 200 µm durch Druckverdüsung der geschmolzenen Legierung hergestellt. Durch innere Oxidation des Legierungspulvers wird unter den in Beispiel 1 angegebenen Bedingungen ein vollständig inneroxidiertes Verbundpulver AgSnO2Bi2O3CuO erhalten. Das Verbundpulver wird mit 0,4 % Massengehalt Wolframoxid-Pulver (WO ) und 0,2 % Massengehalt Molybdänoxid-Pulver (Mo03) in einer Rührwerkskugelmühle unter Azeton während 1 h gemahlen und die Oxidzusätze auf der Oberfläche der Verbundpulverteilchen gleichmäßig verteilt. Nach Trocknen der Pulvermischung wird durch Pressen, Sintern und Warmnachverdichten ein Formkörper hergestellt, dessen Restporosität bei <1,5 % liegt. Die Kontakteigenschaften wurden auf einem in der Literatur beschriebenen Prüfschalter gemessen, sie sind genauso hervorragend wie bei dem im Beispiel 1 beschriebenen Kontaktwerkstoff.A powder of particle size <200 μm is produced from an AgSnBiCu alloy with 7.7% tin (Sn), 1% bismuth (Bi) and 1% copper (Cu) by weight, as in Example 1, by pressure atomization of the molten alloy. An internal oxidation of the alloy powder under the conditions given in Example 1 gives a completely internally oxidized composite powder AgSnO 2 Bi 2 O 3 CuO. The composite powder is ground with 0.4% by mass of tungsten oxide powder (WO) and 0.2% by mass of molybdenum oxide powder (Mo03) in an agitator ball mill under acetone for 1 h and the oxide additives are evenly distributed on the surface of the composite powder particles. After the powder mixture has dried, a shaped body is produced by pressing, sintering and hot post-compression, the residual porosity of which is <1.5%. The contact properties were measured on a test switch described in the literature, they are just as excellent as in the contact material described in Example 1.
8 Patentansprüche8 claims
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT84101010T ATE20506T1 (en) | 1983-02-16 | 1984-02-01 | SINTERED COMPOSITE MATERIAL FOR ELECTRICAL CONTACTS AND PROCESS FOR ITS MANUFACTURE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833305270 DE3305270A1 (en) | 1983-02-16 | 1983-02-16 | SINTER COMPOSITE FOR ELECTRICAL CONTACTS AND METHOD FOR THE PRODUCTION THEREOF |
| DE3305270 | 1983-02-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0118717A1 true EP0118717A1 (en) | 1984-09-19 |
| EP0118717B1 EP0118717B1 (en) | 1986-06-18 |
| EP0118717B2 EP0118717B2 (en) | 1991-02-20 |
Family
ID=6190954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84101010A Expired - Lifetime EP0118717B2 (en) | 1983-02-16 | 1984-02-01 | Sintered material for electrical contacts and its method of manufacture |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4551301A (en) |
| EP (1) | EP0118717B2 (en) |
| JP (1) | JPS59173910A (en) |
| AT (1) | ATE20506T1 (en) |
| DE (2) | DE3305270A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993015517A1 (en) * | 1992-01-24 | 1993-08-05 | Siemens Aktiengesellschaft | Sintered composite materials for electric contacts in power technology switching devices and process for producing them |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3304637A1 (en) * | 1983-02-10 | 1984-08-16 | Siemens AG, 1000 Berlin und 8000 München | SINTER CONTACT MATERIAL FOR LOW VOLTAGE SWITCHGEAR |
| DE3421758A1 (en) * | 1984-06-12 | 1985-12-12 | Siemens AG, 1000 Berlin und 8000 München | SINTER CONTACT MATERIAL FOR LOW VOLTAGE SWITCHGEAR IN ENERGY TECHNOLOGY AND METHOD FOR THE PRODUCTION THEREOF |
| US4680162A (en) * | 1984-12-11 | 1987-07-14 | Chugai Denki Kogyo K.K. | Method for preparing Ag-SnO system alloy electrical contact material |
| JPH06104873B2 (en) * | 1986-07-08 | 1994-12-21 | 富士電機株式会社 | Silver-metal oxide contact material and manufacturing method thereof |
| ES2012293A6 (en) * | 1988-03-26 | 1990-03-01 | Doduco Gmbh Dr Eugen Durrwacht | Semifinished product for electrical contacts, made of a composite material based on silver and tin oxide, and powder metallurgical process for producing it. |
| US4904317A (en) * | 1988-05-16 | 1990-02-27 | Technitrol, Inc. | Erosion resistant Ag-SnO2 electrical contact material |
| JP2849663B2 (en) * | 1988-12-26 | 1999-01-20 | 田中貴金属工業株式会社 | Electrical contact material and manufacturing method thereof |
| US5258052A (en) * | 1992-06-18 | 1993-11-02 | Advanced Metallurgy Incorporated | Powder metallurgy silver-tin oxide electrical contact material |
| DE4331526C3 (en) * | 1992-09-16 | 2003-11-06 | Ami Doduco Gmbh | Material for electrical contacts based on silver-tin oxide or silver-zinc oxide and method for producing a composite powder therefor |
| DE19503182C1 (en) * | 1995-02-01 | 1996-05-15 | Degussa | Sintered material used as electrical contacts for switching amperage rating |
| US5846288A (en) * | 1995-11-27 | 1998-12-08 | Chemet Corporation | Electrically conductive material and method for making |
| US20060028895A1 (en) * | 2004-08-09 | 2006-02-09 | Carl Taussig | Silver island anti-fuse |
| CN104942277A (en) * | 2014-03-31 | 2015-09-30 | 三菱电机株式会社 | Preparing method for novel nanometer doped Ag/SnO2 electrical contact material |
| CN110096839A (en) * | 2019-05-17 | 2019-08-06 | 西北大学 | A kind of method that hot compaction action intensity quantitatively calculates |
| CN112259278B (en) * | 2020-10-19 | 2022-05-03 | 西安工程大学 | Preparation method of particle composite fiber reinforced copper tin oxide contact material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2754335A1 (en) * | 1976-12-03 | 1978-06-08 | Matsushita Electric Ind Co Ltd | ELECTRICAL CONTACT MATERIAL AND METHOD FOR MANUFACTURING IT |
| FR2433054A1 (en) * | 1978-08-11 | 1980-03-07 | Chugai Electric Ind Co Ltd | AG-SN-BI ALLOYS WITH INTERNAL OXIDATION FOR IMPROVED ELECTRICAL CONTACTS |
| GB2055398A (en) * | 1979-08-01 | 1981-03-04 | Chugai Electric Ind Co Ltd | Electrical contact materials of internally oxidized Ag-Sn-Bi alloy |
| EP0039429A1 (en) * | 1980-05-07 | 1981-11-11 | Degussa Aktiengesellschaft | Material for electric contacts |
| EP0056857A1 (en) * | 1981-01-23 | 1982-08-04 | Degussa Aktiengesellschaft | Material for electrical contacts |
| GB2093066A (en) * | 1981-02-12 | 1982-08-25 | Chugai Electric Ind Co Ltd | Electrical contact material |
-
1983
- 1983-02-16 DE DE19833305270 patent/DE3305270A1/en not_active Withdrawn
-
1984
- 1984-02-01 EP EP84101010A patent/EP0118717B2/en not_active Expired - Lifetime
- 1984-02-01 DE DE8484101010T patent/DE3460230D1/en not_active Expired
- 1984-02-01 AT AT84101010T patent/ATE20506T1/en not_active IP Right Cessation
- 1984-02-06 JP JP59019816A patent/JPS59173910A/en active Granted
- 1984-02-07 US US06/577,748 patent/US4551301A/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2754335A1 (en) * | 1976-12-03 | 1978-06-08 | Matsushita Electric Ind Co Ltd | ELECTRICAL CONTACT MATERIAL AND METHOD FOR MANUFACTURING IT |
| FR2433054A1 (en) * | 1978-08-11 | 1980-03-07 | Chugai Electric Ind Co Ltd | AG-SN-BI ALLOYS WITH INTERNAL OXIDATION FOR IMPROVED ELECTRICAL CONTACTS |
| GB2055398A (en) * | 1979-08-01 | 1981-03-04 | Chugai Electric Ind Co Ltd | Electrical contact materials of internally oxidized Ag-Sn-Bi alloy |
| EP0039429A1 (en) * | 1980-05-07 | 1981-11-11 | Degussa Aktiengesellschaft | Material for electric contacts |
| EP0056857A1 (en) * | 1981-01-23 | 1982-08-04 | Degussa Aktiengesellschaft | Material for electrical contacts |
| GB2093066A (en) * | 1981-02-12 | 1982-08-25 | Chugai Electric Ind Co Ltd | Electrical contact material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993015517A1 (en) * | 1992-01-24 | 1993-08-05 | Siemens Aktiengesellschaft | Sintered composite materials for electric contacts in power technology switching devices and process for producing them |
| US5486222A (en) * | 1992-01-24 | 1996-01-23 | Siemens Aktiengesellschaft | Sintered composite materials for electric contacts in power technology switching devices and process for producing them |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0586006B2 (en) | 1993-12-09 |
| JPS59173910A (en) | 1984-10-02 |
| DE3460230D1 (en) | 1986-07-24 |
| ATE20506T1 (en) | 1986-07-15 |
| EP0118717B2 (en) | 1991-02-20 |
| EP0118717B1 (en) | 1986-06-18 |
| DE3305270A1 (en) | 1984-08-16 |
| US4551301A (en) | 1985-11-05 |
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