JPS63230555A - Superconductive material - Google Patents
Superconductive materialInfo
- Publication number
- JPS63230555A JPS63230555A JP62061449A JP6144987A JPS63230555A JP S63230555 A JPS63230555 A JP S63230555A JP 62061449 A JP62061449 A JP 62061449A JP 6144987 A JP6144987 A JP 6144987A JP S63230555 A JPS63230555 A JP S63230555A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- periodic table
- centered cubic
- superconductive material
- group iia
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 24
- 230000000737 periodic effect Effects 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 4
- 239000001301 oxygen Substances 0.000 claims abstract description 4
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 4
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 4
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 4
- 229910052788 barium Inorganic materials 0.000 claims description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical group [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical group [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000002887 superconductor Substances 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 20
- 239000000919 ceramic Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- -1 and among these Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000012916 structural analysis Methods 0.000 description 2
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 229910052767 actinium Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 235000019402 calcium peroxide Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 229910052705 radium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、新規な超電導材料に関するもので、特に、
セラミック系の超電導材料に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a novel superconducting material, and in particular,
It relates to ceramic-based superconducting materials.
［従来の技術］
従来、超電導材料として、金属系、セラミック系、有機
物系のものがあるが、このうちセラミック系のものが近
年脚光を浴びつつある。このようなセラミック系超電導
材料としては、層状ペロブスカイト型（Ｋ２ Ｎ ｉ
Ｆ、型）の構造を有するものが知られている。たとえば
、ＣＬ ａ Ｓ ｒｌ ２ ＣａＯ２または［ＬａＢａ
］ ２ Ｃｕｂ、のような酸化物セラミックス系超電導
材料では、３０に以上の臨界温度を示している。[Prior Art] Conventionally, superconducting materials include metal-based, ceramic-based, and organic-based materials, and among these, ceramic-based materials have been attracting attention in recent years. As such ceramic superconducting materials, layered perovskite type (K2N i
F, type) is known. For example, CL a S rl 2 CaO2 or [LaBa
] 2 Cub, an oxide ceramic-based superconducting material exhibits a critical temperature of 30° C. or more.
［発明が解決しようとする問題点］
この発明の目的は、従来の層状ペロブスカイト型超電導
材料よりも臨界温度の高い超電導材料を提供することに
ある。[Problems to be Solved by the Invention] An object of the present invention is to provide a superconducting material having a higher critical temperature than conventional layered perovskite superconducting materials.
［問題点を解決するための手段］
この発明の超電導材料は、周期律表ＩＩａ族元素、Ｈａ
族元素、銅および酸素を含み、周期律表ＩＩａ族元素が
相対的に多い体心立方構造を有する第１相と、該第１相
に比べて周期律表ＩＩａ族元素が相対的に少ない体心立
方構造を有する第２相と、層状ペロブスカイト構造をａ
する第３相とを含む。[Means for solving the problems] The superconducting material of the present invention contains an element of group IIa of the periodic table, Ha
A first phase having a body-centered cubic structure containing group elements, copper, and oxygen and having a relatively large amount of group IIa elements of the periodic table, and a body containing relatively few group IIa elements of the periodic table compared to the first phase. A second phase with a centered cubic structure and a layered perovskite structure
and a third phase.
周期律表ＩＩａ族元素としては、Ｂ ｅ ｓ Ｍ ｇ
ｓ Ｃａ、Ｓｒ、ＢａおよびＲａが挙げられる。また、
周期律表Ｈａ族元素としては、Ｓｃ、Ｙ、Ｌａ、Ａｃ。As Group IIa elements of the periodic table, B e s M g
s Ca, Sr, Ba and Ra. Also,
Ha group elements of the periodic table include Sc, Y, La, and Ac.
Ｃｅｓ Ｐｒ、Ｎｄ、Ｐｍ、Ｓｍ、Ｅｕ、Ｇｄ、Ｔｂｓ
ＤｙＳＨｏＳＥｒＳＴｍ、ＹｂおよびＬｕが挙げられ
る。好ましくは、ＩＩａ族元素がバリウムまたはストロ
ンチウムであり、ｍａ族元素がイツトリウムまたはスカ
ンジウムである。Ces Pr, Nd, Pm, Sm, Eu, Gd, Tbs
DySHoSErSTm, Yb and Lu are mentioned. Preferably, the IIa group element is barium or strontium, and the Ma group element is yttrium or scandium.
［発明の作用および効果］
この発明による超電導材料の詳細な構造解析と超電導状
態の挙動を検討した結果、２つの体心立方構造の相と層
状ペロブスカイト構造の相の３相の混合状態であること
が、高い超電導臨界温度に決定的な役割を示すことが判
明した。[Operations and Effects of the Invention] As a result of detailed structural analysis of the superconducting material according to the present invention and examination of the behavior of the superconducting state, it was found that it is a mixed state of three phases: two phases with a body-centered cubic structure and a phase with a layered perovskite structure. was found to play a decisive role in the high superconducting critical temperature.
さらに、２つの体心立方構造の相の一方は、■ａ族元索
が相対的に多い相であり、他方はＩＩａ族元素が相対的
に少ない相であることを見い出した。Furthermore, it has been found that one of the two phases with a body-centered cubic structure is a phase with a relatively large amount of group ■a element elements, and the other is a phase with a relatively small amount of group IIa elements.
２つの体心立方構造の相と層状ペロブスカイト構造の相
の３相混合状態からなる、この発明の超電導材料は、電
気抵抗が零の完全超電導体になる温度が定常的に液体窒
素温度（７７Ｋ）以上であった。The superconducting material of the present invention, which consists of a three-phase mixed state of two phases with a body-centered cubic structure and a phase with a layered perovskite structure, has a temperature at which it becomes a perfect superconductor with zero electrical resistance at a constant temperature of liquid nitrogen (77 K). That was it.
この発明の超電導材料は、その製造方法によって限定さ
れるものではないが、周期律表ＩＩａ族元素、ＩＩＩａ
族元素および銅のそれぞれの単体、酸化物もしくは炭酸
化物などの粉末を混合し焼結することにより製造するこ
とができる。また、この焼結を酸素を含む雰囲気下で各
材料の溶融温度または分解温度直下で行なえば、この発
明の超電導材料が得られやすいことが確認されている。The superconducting material of the present invention is not limited by its manufacturing method, but includes elements of group IIa of the periodic table, group IIIa of the periodic table,
It can be manufactured by mixing and sintering powders of individual elements, oxides, or carbonates of group elements and copper. Furthermore, it has been confirmed that the superconducting material of the present invention can be easily obtained if this sintering is performed in an oxygen-containing atmosphere just below the melting temperature or decomposition temperature of each material.
なお、溶融温度とは、わずかでも液相の生じる温度をい
い、分解温度とは、少なくとも一部において元素または
成分単位に別れてしまい、結晶構造をとり得ない温度を
いうものとする。溶融温度とするか分解温度とするかは
、いずれが低い温度であるかにより異なる。この溶融温
度と分解温度との上下関係は、材料成分、組成割合等に
よって異なることをここで指摘しておく。Note that the melting temperature refers to the temperature at which even a slight liquid phase occurs, and the decomposition temperature refers to the temperature at which at least a portion of the substance is separated into elemental or component units and cannot form a crystal structure. Whether it is the melting temperature or the decomposition temperature depends on which temperature is lower. It should be pointed out here that the vertical relationship between the melting temperature and the decomposition temperature varies depending on the material components, composition ratios, etc.
［実施例〕
この発明の実施例として、Ｂａ５Ｃｕ、、Ｙの酸化物な
どの微粉末を１００気圧で固めた後、大気中において９
４０℃で２４時間焼成し、最終的にＢ ａ Ｃｕ６．７
ｙｏ、、 ｏ、になるように調整した試料の電気抵抗の
温度による変化を調べたところ、第１図に示すごとき結
果となった。[Example] As an example of the present invention, fine powder of Ba5Cu, Y oxide, etc. was solidified at 100 atmospheres and then
Calcinate at 40°C for 24 hours, and finally B a Cu6.7
When the change in electrical resistance of a sample adjusted to yo, o, due to temperature was investigated, the results shown in FIG. 1 were obtained.
第１図に示されるように、３００にで超電導状態になり
始め、８２にで電気抵抗が零である完全超電導状態とな
った。As shown in FIG. 1, it began to become superconducting at 300, and reached a complete superconducting state with zero electrical resistance at 82.
この試料をＸ線回折で構造解析したところ３相よりなり
、第１相はＢａが相対的に多い体心立方構造であり、第
２相はＢａが相対的に少ない体心立方構造であり、第３
相はに２ＮＬＦ４型またそれに類似する型の層状ペロブ
スカイト構造であった。Structural analysis of this sample by X-ray diffraction revealed that it consisted of three phases: the first phase had a body-centered cubic structure with a relatively large amount of Ba, and the second phase had a body-centered cubic structure with a relatively small amount of Ba. Third
The phase was a layered perovskite structure of the 2NLF4 type or similar types.
第１相の体心立方構造の格子定数は、ａ−ｂ−５，８±
０．ＩＡ、ｃ−５，７５±０．ＩＡであり、第２相の体
心立方構造の格子定数は、ａ−ｂ−５，５±０．ＩＡ、
ｃ−５，４７±０．ＩＡであり、第３相の層状ペロブス
カイト構造の格子定数は、ａ−ｂ−４，０±０．１人、
ｃ−１３，０±０．ＩＡであった。The lattice constant of the body-centered cubic structure of the first phase is a-b-5,8±
0. IA, c-5, 75±0. IA, and the lattice constant of the body-centered cubic structure of the second phase is a-b-5,5±0. IA,
c-5,47±0. IA, and the lattice constant of the layered perovskite structure of the third phase is a-b-4,0±0.1,
c-13,0±0. It was IA.
なお、体心立方構造の格子定数は、厳密にはａ−ｂ−ｃ
であるが、上記数値かられかるように、ａ＝ｂ−ｃの条
件かられずかにずれていても、体心立方構造と言うこと
が許容され、この明細書においては、少し歪んでいる場
合も、体心立方構造と呼ぶことにする。Note that the lattice constant of the body-centered cubic structure is strictly a-b-c
However, as can be seen from the above numerical values, even if there is a slight deviation from the condition of a = b - c, it is acceptable to say that it is a body-centered cubic structure, and in this specification, if it is slightly distorted, is also called a body-centered cubic structure.
第１図は、この発明の実施例の電気抵抗の温度変化を示
す図である。
１ｆ−FIG. 1 is a diagram showing a temperature change in electrical resistance in an embodiment of the present invention. 1f-
Claims (2)
素を含む超電導材料において、 周期律表IIａ族元素が相対的に多い体心立方構造を有す
る第１相と、該第１相に比べて周期律表IIａ族元素が相
対的に少ない体心立方構造を有する第２相と、層状ペロ
ブスカイト構造を有する第３相とを含むことを特徴とす
る、超電導材料。(1) In a superconducting material containing group IIa elements of the periodic table, group IIIa elements, copper, and oxygen, a first phase having a body-centered cubic structure with a relatively large amount of group IIa elements of the periodic table; 1. A superconducting material comprising a second phase having a body-centered cubic structure containing relatively less Group IIa elements of the periodic table and a third phase having a layered perovskite structure.
ンチウム、IIIａ族元素がイットリウムまたはスカンジ
ウムであることを特徴とする、特許請求の範囲第１項記
載の超電導材料。(2) The superconducting material according to claim 1, wherein the group IIa element of the periodic table is barium or strontium, and the group IIIa element is yttrium or scandium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62061449A JPS63230555A (en) | 1987-03-16 | 1987-03-16 | Superconductive material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62061449A JPS63230555A (en) | 1987-03-16 | 1987-03-16 | Superconductive material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63230555A true JPS63230555A (en) | 1988-09-27 |
Family
ID=13171376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62061449A Pending JPS63230555A (en) | 1987-03-16 | 1987-03-16 | Superconductive material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63230555A (en) |
-
1987
- 1987-03-16 JP JP62061449A patent/JPS63230555A/en active Pending
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