JPH032822B2 - - Google Patents
Info
- Publication number
- JPH032822B2 JPH032822B2 JP57152238A JP15223882A JPH032822B2 JP H032822 B2 JPH032822 B2 JP H032822B2 JP 57152238 A JP57152238 A JP 57152238A JP 15223882 A JP15223882 A JP 15223882A JP H032822 B2 JPH032822 B2 JP H032822B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- mortar
- refractory
- bricks
- 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.)
- Expired - Lifetime
Links
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 26
- 239000004570 mortar (masonry) Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000000395 magnesium oxide Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 11
- 239000011822 basic refractory Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 6
- 239000011449 brick Substances 0.000 description 13
- 239000000047 product Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000004513 sizing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Description
本発明は各種工業窯炉、溶融金属容器等のライ
ニングに使用される耐火れんが用の塩基性耐火モ
ルタルに関する。
耐火モルタルとは、耐火性骨材に粘土、無機バ
インダー、有機糊剤等を添加してなるものであ
り、れんが積み施工の接着に使用されている。こ
の施工時の作業性を改善するためには、この様な
れんが積み施工接着用の耐火モルタル（以下特に
必要でない限り、単に耐火モルタルという）の接
着時間が短く且つ可使時間が長いことが必要であ
る。
従来の耐火モルタルのうち、アルミナ質の耐火
性モルタルとしては、第１リン酸アルミニウムと
その硬化剤を添加して自硬性をもたせたものが使
用されている。この自硬性によつて、短時間でれ
んがの接着が可能となつたが接着時間を短くする
と可使時間も短くなり、逆に可使時間を長くする
と接着時間も長くなるという関係があり、接着時
間が短く且つ可使時間が長いものは得られていな
い。
また、従来の塩基性耐火モルタルは、粘土、有
機糊剤等を添加したものであり、吸水性の高いれ
んがは短時間で接着できるが、吸水性の低いれん
がに使用した場合には接着時間が長く使用に耐え
ないものであつた。
即ち、近年Al2O3−Ｃ系、MgO−Ｃ系、Al2O3
−SiC−Ｃ系れんが等の吸水性の低いれんがが使
用されることが多くなり、従来の塩基性耐火モル
タルではれんがが該モルタル中の水分を吸収しな
いため硬化が著しく遅れ、接着時間が非常に長く
なり、れんが積み施工に支障をきたすようになつ
た。
更に、れんが積み施工時の作業性をより改善す
るためには、接着時間が短くなり過ぎるのも好ま
しくなく、接着時間が適度に短いこと、即ち３分
〜数時間程度で硬化接着できることが要望されて
いる。
本発明者は、上記現状に鑑み、吸水性の低いれ
んがにも好適に使用でき、作業性を改善する適度
な接着時間と長い可使時間を有する塩基性モルタ
ルを得るために種々研究した結果、マグネシアと
硫酸アルミニウムとの反応による硬化作用と、有
機糊剤の保水性による硬化遅延作用とを組み合わ
せることにより目的が達成できること並びに更に
特定粒径のシリカ微粉を添加したときには接着強
度、接着部分の機械的強度及び耐蝕性が向上する
ことを見い出し本発明を完成するに至つた。
即ち本発明は、マグネシア原料を50重量％以上
含む耐火性骨材100重量部に対して、硫酸アルミ
ニウム0.5〜15重量部及び有機糊剤0.01〜７重量
部を添加したことを特徴とするれんが積み施工接
着用塩基性耐火モルタル、及びこれに粒径5μｍ
以下のシリカ微粉0.05〜15重量部を更に添加した
ことを特徴とするれんが積み施工接着用塩基性耐
火モルタルに係る。
本発明で用いる耐火性骨材におけるマグネシア
原料としては、例えば電蝕マグネシア、焼結マグ
ネシア、天然マグネシア等を挙げることができ、
これらの少なくとも１種を用いる。本発明におい
ては、これらマグネシア原料のみを用いても良い
し、又マグネシア原料とその他の耐火性骨材とを
混合して用いても良い。その他の耐火性骨材とし
ては、公知のものがいずれも使用でき、例えばア
ルミナ、ムライト、シヤモツト、ロー石、粘土、
クロム鉱等を挙げることができる。その他の耐火
性骨材を混合する場合は、マグネシア原料が50重
量％以上含有されることが必要である。マグネシ
ア原料が50重量％未満の場合は、耐蝕性が低下す
る。上記マグネシア原料及びその他の骨材の粒度
としては、特に限定されるものではないが、通常
４mm以下程度であり、所要の目地厚に応じて適宜
選択される。
本発明における硫酸アルミニウムの添加量は、
耐火性骨材100重量部に対して通常0.5〜15重量部
好ましくは１〜10重量部である。0.5重量部より
少ないと硬化が遅くなり接着に長時間を要する。
15重量部を越えると、硬化が早くなり過ぎて作業
性が低下する。
本発明における有機糊剤としては、公知のもの
がいずれも使用でき、例えばデキストリン、デン
粉、メチルセルロース等を挙げることができ、こ
れらの少なくとも１種を用いる。有機糊剤の添加
量は、耐火性骨材100重量部に対して通常0.01〜
７重量部好ましくは0.05〜５重量部である。0.01
重量部より少ないと硬化遅延効果が得られず、７
重量部を越えると耐蝕性が低下する。
本発明においては、粒径5μｍ以下のシリカ微
粉を添加することにより、接着強度及び接着部分
の機械的強度を向上させることができると共に、
溶融金属の摩耗による侵蝕を抑えることができ
る。シリカ微粉としては、粒径5μｍ以下のもの
であれば良く、例えばフエロシリコンの製造工程
で副生する微細なもの等が好適である。粒径が
5μｍより大きい場合には機械的強度の向上がみ
られない。また、シリカ微粉の添加量は、耐火性
骨材100重量部に対して通常0.05〜15重量部好ま
しくは0.1〜10重量部である。0.05重量部より少
ないと機械的強度が向上しない。15重量部を越え
て添加すると耐蝕性が低下する。
本発明の塩基性耐火モルタルは、上記各成分を
所定の割合で混合した粉末に適量の水を加えて混
練して使用される。
本発明によれば以下の様な効果が得られる。
(1) 硫酸アルミニウム及び有機糊剤の添加量を前
記特定範囲内で適宜選択することにより、接着
時間を10分〜数時間程度の範囲で自由に調節で
きる。
(2) 可使時間が２〜24時間程度で、非常に長い。
(3) (1)及び(2)により作業性が著しく向上してい
る。
(4) 硫酸アルミニウムを添加したことにより吸水
性の低いれんがにも好適に使用できる。
(5) 従来のものと比べて、同等以上の接着強度を
有する。
(6) シリカ微粉を添加したものでは接着強度、接
着部分の機械的強度及び耐蝕性が向上してい
る。
以下、実施例を挙げて、本発明を更に具体的に
説明する。
実施例 １
下記第１表に示す配合割合の各成分を混練して
塩基性耐火モルタルを製造し、接着時間及び可使
時間を調査した。結果を下記第１表に併記する。
The present invention relates to a basic refractory mortar for refractory bricks used for lining various industrial kilns, molten metal containers, etc. Fireproof mortar is made by adding clay, inorganic binder, organic glue, etc. to fireproof aggregate, and is used for adhesion in brickwork construction. In order to improve workability during construction, it is necessary that the adhesion time and pot life of the refractory mortar used for bonding brickwork (hereinafter simply referred to as refractory mortar unless otherwise required) be short and the pot life long. It is. Among conventional refractory mortars, alumina-based refractory mortars that are made self-hardening by adding monoaluminum phosphate and its hardening agent are used. This self-hardening property made it possible to bond bricks in a short time, but if the bonding time is shortened, the pot life will also be shortened, and conversely, if the pot life is lengthened, the bonding time will also be lengthened. A product with a short time and a long pot life has not been obtained. In addition, conventional basic fireproof mortar is made by adding clay, organic glue, etc., and can bond bricks with high water absorption in a short time, but when used on bricks with low water absorption, the adhesion time becomes longer. It was unusable for a long time. That is, in recent years, Al 2 O 3 -C system, MgO-C system, Al 2 O 3
-Bricks with low water absorption such as SiC-C bricks are increasingly being used, and with conventional basic fireproof mortar, the bricks do not absorb the moisture in the mortar, resulting in a significant delay in curing and extremely long adhesion times. It became long and began to interfere with bricklaying work. Furthermore, in order to further improve the workability during bricklaying construction, it is not preferable for the bonding time to be too short, and it is desired that the bonding time be appropriately short, that is, the bonding can be cured in about 3 minutes to several hours. ing. In view of the above-mentioned current situation, the present inventor conducted various research in order to obtain a basic mortar that can be suitably used for bricks with low water absorption and has an appropriate adhesion time and a long pot life that improves workability. The objective can be achieved by combining the hardening effect caused by the reaction between magnesia and aluminum sulfate, and the hardening retardation effect caused by the water retention properties of the organic glue.Additionally, when fine silica powder of a specific particle size is added, the adhesive strength and mechanical properties of the bonded part can be improved. The present inventors have discovered that the mechanical strength and corrosion resistance are improved, and have completed the present invention. That is, the present invention provides a bricklayer characterized in that 0.5 to 15 parts by weight of aluminum sulfate and 0.01 to 7 parts by weight of an organic sizing agent are added to 100 parts by weight of a refractory aggregate containing 50% by weight or more of magnesia raw material. Basic refractory mortar for construction adhesion, and particle size 5μm in this
The present invention relates to a basic refractory mortar for bonding bricklaying work, characterized in that 0.05 to 15 parts by weight of the following silica fine powder is further added. Examples of the magnesia raw material in the refractory aggregate used in the present invention include electrolytic magnesia, sintered magnesia, natural magnesia, etc.
At least one of these is used. In the present invention, these magnesia raw materials alone may be used, or a mixture of magnesia raw materials and other refractory aggregates may be used. As other fire-resistant aggregates, any known ones can be used, such as alumina, mullite, siyamoto, low stone, clay,
Examples include chromite. When mixing other refractory aggregates, it is necessary that the magnesia raw material is contained in an amount of 50% by weight or more. If the magnesia raw material is less than 50% by weight, corrosion resistance will decrease. The particle size of the magnesia raw material and other aggregates is not particularly limited, but is usually about 4 mm or less, and is appropriately selected depending on the required joint thickness. The amount of aluminum sulfate added in the present invention is
The amount is usually 0.5 to 15 parts by weight, preferably 1 to 10 parts by weight, per 100 parts by weight of the refractory aggregate. If the amount is less than 0.5 parts by weight, curing will be slow and adhesion will take a long time.
If it exceeds 15 parts by weight, curing will be too rapid and workability will be reduced. As the organic sizing agent in the present invention, any known sizing agent can be used, such as dextrin, starch, methylcellulose, etc., and at least one of these can be used. The amount of organic sizing agent added is usually 0.01 to 100 parts by weight of fire-resistant aggregate.
The amount is 7 parts by weight, preferably 0.05 to 5 parts by weight. 0.01
If the amount is less than 7 parts by weight, the curing retardation effect cannot be obtained;
If the amount exceeds parts by weight, corrosion resistance will decrease. In the present invention, by adding fine silica powder with a particle size of 5 μm or less, it is possible to improve the adhesive strength and the mechanical strength of the bonded part, and
Erosion caused by wear of molten metal can be suppressed. The fine silica powder may have a particle size of 5 μm or less, and for example, fine powder produced as a by-product in the manufacturing process of ferrosilicon is suitable. particle size
When the thickness is larger than 5 μm, no improvement in mechanical strength is observed. The amount of fine silica powder added is usually 0.05 to 15 parts by weight, preferably 0.1 to 10 parts by weight, per 100 parts by weight of the refractory aggregate. If it is less than 0.05 parts by weight, mechanical strength will not improve. If more than 15 parts by weight is added, corrosion resistance will decrease. The basic refractory mortar of the present invention is used by adding an appropriate amount of water to a powder obtained by mixing the above-mentioned components in a predetermined ratio and kneading the mixture. According to the present invention, the following effects can be obtained. (1) By appropriately selecting the amounts of aluminum sulfate and organic sizing agent added within the above-mentioned specific ranges, the adhesion time can be freely adjusted within the range of about 10 minutes to several hours. (2) The pot life is very long, about 2 to 24 hours. (3) Workability has been significantly improved due to (1) and (2). (4) Due to the addition of aluminum sulfate, it can be suitably used for bricks with low water absorption. (5) Compared to conventional products, it has adhesive strength that is equal to or higher than that of conventional products. (6) The adhesive strength, mechanical strength of the bonded part, and corrosion resistance are improved with the addition of fine silica powder. EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples. Example 1 A basic refractory mortar was prepared by kneading each component in the proportions shown in Table 1 below, and the adhesion time and pot life were investigated. The results are also listed in Table 1 below.
【表】
第１表により、硫酸アルミニウムと有機糊剤と
を併用した本発明品が、比較品と比べて、適度な
接着時間を有し且つ可使時間が長いことにより作
業性に優れることが明らかである。
実施例 ２
下記第２表に示す配合割合の各成分を混練して
塩基性耐火モルタルを製造して、その接着強度を
測定した。また、該モルタルを所定の形状の型枠
内に突き込み成形して試料を作成し、この試料を
用いて機械的強度の試験と耐蝕性試験を行つた結
果を下記第２表に併記する。[Table] Table 1 shows that the product of the present invention, which uses a combination of aluminum sulfate and an organic glue, has a suitable adhesion time and a long pot life, and is superior in workability compared to comparative products. it is obvious. Example 2 Basic refractory mortar was produced by kneading each component in the proportions shown in Table 2 below, and its adhesive strength was measured. In addition, a sample was prepared by pushing the mortar into a mold of a predetermined shape, and a mechanical strength test and a corrosion resistance test were conducted using this sample. The results are also listed in Table 2 below.
【表】【table】
【表】
第２表により、本発明品は、いずれも充分な接
着強度を有し、且つ優れた機械的強度と耐蝕性を
有すること及びシリカ微粉の添加量が増加するに
つれて接着強度と機械的強度が向上し、耐蝕性も
シリカ微粉少なくとも５重量部の添加量までは向
上していることが明らかである。
実施例 ３
第１表の本発明品３の水以外の各成分を混合し
た後、モルタルミキサーで水を20重量部添加し混
練して塩基性耐火モルタルを製造した。これを用
いて溶鋼鍋のスラグライン部のMgO−Ｃれんが
を積み上げたが、施工時の可使時間は10時間と充
分であり、れんがの接着時間は100分であり、作
業性が良好であつた。また、溶鋼鍋の稼働時には
目地部の局部溶損、地金差しは見られなかつた。
尚、第１表の比較品１のモルタルでは施工後24時
間経過してもれんがを固定することができなかつ
た。
実施例 ４
水の添加量を23重量部とした以外は、第１表の
本発明品４と同じ配合割合の各成分を用いて、実
施例３と同様にして塩基性耐火モルタルを製造し
た。これを混銑車スラグライン部のAl2O3−SiC
−Ｃれんがのれんが積みに使用したが、施工時の
可使時間は４時間、接着時間は60分で、作業性は
良好であり、施工後、混銑車稼働時にも異常はな
く使用することができた。[Table] Table 2 shows that the products of the present invention all have sufficient adhesive strength and excellent mechanical strength and corrosion resistance, and that as the amount of silica fine powder added increases, the adhesive strength and mechanical It is clear that the strength is improved and the corrosion resistance is also improved up to an amount of at least 5 parts by weight of fine silica powder. Example 3 After mixing each component other than water in Invention Product 3 shown in Table 1, 20 parts by weight of water was added and kneaded using a mortar mixer to produce a basic refractory mortar. This was used to stack MgO-C bricks for the slag line of a molten steel ladle, and the pot life at the time of construction was a sufficient 10 hours, and the brick adhesion time was 100 minutes, indicating good workability. Ta. Further, when the molten steel ladle was in operation, no local melting damage at the joints or metal inserts were observed.
It should be noted that the mortar of Comparative Product 1 in Table 1 could not fix bricks even after 24 hours had passed after construction. Example 4 A basic refractory mortar was produced in the same manner as in Example 3, except that the amount of water added was 23 parts by weight, using each component in the same proportions as in Inventive Product 4 in Table 1. This is used as Al 2 O 3 −SiC in the slag line of the pig iron car.
-C bricks were used for bricklaying, and the pot life at the time of construction was 4 hours, and the adhesion time was 60 minutes, so the workability was good, and there were no abnormalities during operation of the mixed iron truck after construction. did it.
Claims (1)
材100重量部に対して、硫酸アルミニウム0.5〜15
重量部及び有機糊剤0.01〜７重量部を添加したこ
とを特徴とするれんが積み施工接着用塩基性耐火
モルタル。 ２ マグネシア原料を50重量％以上含む耐火性骨
材100重量部に対して、硫酸アルミニウム0.5〜15
重量部、粒径5μｍ以下のシリカ微粉0.05〜15重量
部及び有機糊剤0.01〜７重量部を添加したことを
特徴とするれんが積み施工接着用塩基性耐火モル
タル。[Claims] 1. 0.5 to 15 parts by weight of aluminum sulfate per 100 parts by weight of refractory aggregate containing 50% by weight or more of magnesia raw material.
A basic refractory mortar for adhesion in bricklaying work, characterized in that it contains 0.01 to 7 parts by weight of an organic glue. 2. 0.5 to 15 parts by weight of aluminum sulfate per 100 parts by weight of refractory aggregate containing 50% by weight or more of magnesia raw material.
1. A basic refractory mortar for bonding brickwork, characterized in that 0.05 to 15 parts by weight of fine silica powder with a particle size of 5 μm or less and 0.01 to 7 parts by weight of an organic glue are added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57152238A JPS5945973A (en) | 1982-08-31 | 1982-08-31 | Basic refractory mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57152238A JPS5945973A (en) | 1982-08-31 | 1982-08-31 | Basic refractory mortar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5945973A JPS5945973A (en) | 1984-03-15 |
| JPH032822B2 true JPH032822B2 (en) | 1991-01-17 |
Family
ID=15536102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57152238A Granted JPS5945973A (en) | 1982-08-31 | 1982-08-31 | Basic refractory mortar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5945973A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS627677A (en) * | 1985-07-01 | 1987-01-14 | 新日本製鐵株式会社 | Refractory joint mortar |
| JPS62148377A (en) * | 1985-12-23 | 1987-07-02 | 品川白煉瓦株式会社 | Quick-set spray refractory composition |
| ES2899921T3 (en) * | 2017-12-19 | 2022-03-15 | Refractory Intellectual Property Gmbh & Co Kg | Refractory mixture, a process for the manufacture of an uncast refractory ceramic product from the mixture as well as an uncast refractory ceramic product obtained by the process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53113812A (en) * | 1977-03-17 | 1978-10-04 | Nippon Kokan Kk | Indefinite form and nonnburnt basic refractory material |
| JPS55162482A (en) * | 1979-06-04 | 1980-12-17 | Harima Refractories Co Ltd | Basic spraying material with low porosity |
| JPS5717875A (en) * | 1980-07-07 | 1982-01-29 | Matsushita Electric Ind Co Ltd | Magnetic field sensor |
-
1982
- 1982-08-31 JP JP57152238A patent/JPS5945973A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53113812A (en) * | 1977-03-17 | 1978-10-04 | Nippon Kokan Kk | Indefinite form and nonnburnt basic refractory material |
| JPS55162482A (en) * | 1979-06-04 | 1980-12-17 | Harima Refractories Co Ltd | Basic spraying material with low porosity |
| JPS5717875A (en) * | 1980-07-07 | 1982-01-29 | Matsushita Electric Ind Co Ltd | Magnetic field sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5945973A (en) | 1984-03-15 |
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