JPH04130045A - Production of oxide superconductor - Google Patents
Production of oxide superconductorInfo
- Publication number
- JPH04130045A JPH04130045A JP2247359A JP24735990A JPH04130045A JP H04130045 A JPH04130045 A JP H04130045A JP 2247359 A JP2247359 A JP 2247359A JP 24735990 A JP24735990 A JP 24735990A JP H04130045 A JPH04130045 A JP H04130045A
- Authority
- JP
- Japan
- Prior art keywords
- oxide superconductor
- powder
- critical current
- current density
- soln
- 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.)
- Granted
Links
- 239000002887 superconductor Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000843 powder Substances 0.000 claims abstract description 10
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 4
- 229910002480 Cu-O Inorganic materials 0.000 claims abstract 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 abstract description 6
- 229910001111 Fine metal Inorganic materials 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 239000002923 metal particle Substances 0.000 abstract 1
- 230000005415 magnetization Effects 0.000 description 12
- 229910052709 silver Inorganic materials 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 8
- 239000004332 silver Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000654 additive Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- 229910014454 Ca-Cu Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- -1 complexes Chemical class 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- FDWREHZXQUYJFJ-UHFFFAOYSA-M gold monochloride Chemical compound [Cl-].[Au+] FDWREHZXQUYJFJ-UHFFFAOYSA-M 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000657 niobium-tin Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003860 storage Methods 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は蓄電・送電システム、磁気浮上列車、磁気共鳴
画像処理システム等に適用される酸化物超伝導体の製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing an oxide superconductor that is applied to power storage and power transmission systems, magnetic levitation trains, magnetic resonance image processing systems, and the like.
高い臨界温度（以下Ｔｃという）を有する酸化物超伝導
体としてはＬｎ−Ｂａ−Ｃｕ−０系（Ｌｎ：希土類元素
、 Ｔｃ＝ ９０ Ｋ） 、Ｂ１−３ｒ−［：ａ−Ｃｕ
−０系、（Ｔｃ＝ １１０ Ｋ ） 、Ｔｌ−Ｂａ−Ｃ
ａ−Ｃｕ−Ｄ系（Ｔｃ＝ １２５Ｋ）等が知られている
。これらの酸化物はＴｃが高いのみならず、上部臨界磁
場Ｈｃ、も従来の金属系材料に比べて高く、高磁場発生
用マグネットへの適用が期待されている。Examples of oxide superconductors having a high critical temperature (hereinafter referred to as Tc) include Ln-Ba-Cu-0 system (Ln: rare earth element, Tc = 90 K), B1-3r-[:a-Cu
-0 series, (Tc=110K), Tl-Ba-C
The a-Cu-D system (Tc=125K) and the like are known. These oxides not only have a high Tc but also a higher upper critical magnetic field Hc than conventional metal-based materials, and are expected to be applied to magnets for generating high magnetic fields.
従来の金属系材料では、４．２に近傍で使用する際に粒
界等がピン止め点（ローレンツ力による磁束線の勧きを
制御する）として作用するので、高磁場中でも高い臨界
電流密度を有しＮｂ３Ｓｎ等では＆、’７２０Ｔ（テス
ラ）の高磁場も発生可能である。In conventional metallic materials, when used in the vicinity of 4.2, grain boundaries act as pinning points (controlling the direction of magnetic flux lines due to Lorentz force), making it possible to maintain high critical current densities even in high magnetic fields. With Nb3Sn, etc., it is possible to generate a magnetic field as high as '720T (Tesla).
これに対して酸化物超伝導体は、例えば金属シースに充
填し、延伸加工後熱処理を施せば超伝導性を示す線材に
できるが、ウィークリンクフラッグスクリープ等の理由
により、液体窒素温度では臨界電流密度が低く、実用化
への壁となっている。そこで酸化物超伝導体にも新たに
強いピン止め点を導入する必要がある。On the other hand, oxide superconductors can be made into wires that exhibit superconductivity by, for example, filling a metal sheath and subjecting them to heat treatment after drawing, but due to reasons such as weak link flag creep, the critical current at liquid nitrogen temperature Its low density is a barrier to practical application. Therefore, it is necessary to introduce a new strong pinning point to oxide superconductors.
本発明は上記技術水準に鑑み、人工のピン止め中心を有
する酸化物超伝導体の製造方法を提供しようとするもの
である。In view of the above-mentioned state of the art, the present invention provides a method for producing an oxide superconductor having an artificial pinning center.
以上の問題点を解決するために、本発明者らは鋭意研究
の結果、酸化物超伝導体に微細な不純物粒子を分散させ
ることによりピン止め効果が向上し、磁場中での臨界電
流密度の改善されることを確Ｓ忍した。本発明はこの知
見に基いて完成されたものであって、貴金属、アルミニ
ウム、マグネシウムよりなる群のうちの少なくとも１種
以上の金属元素を含む溶液を酸化物超伝導体粉末に含浸
担持させた後、焼結を行うことを特徴とする酸化物超伝
導体の製造方法である。In order to solve the above problems, the present inventors conducted intensive research and found that the pinning effect was improved by dispersing fine impurity particles in the oxide superconductor, and the critical current density in the magnetic field was improved. I was confident that things would improve. The present invention has been completed based on this knowledge, and includes the following: After impregnating and supporting an oxide superconductor powder with a solution containing at least one metal element from the group consisting of noble metals, aluminum, and magnesium, , a method for producing an oxide superconductor, characterized by performing sintering.
本発明の上記製造方法において、製造された酸化物超伝
導体中に分散した貴金属、アルミナ、マグネシアよりな
る群のうちの少なくとも１種以上の微粒子の量が全量の
０．０１〜５ ｖｏ１％になるように、貴金属（Ａｕ、
Ａｇ、 Ｐｔなど）、アルミニウム、マグネシウムに
よりなる群のうちの少なくとも１種以上の金属元素を含
む溶液を酸化物超伝導体粉末に含浸担持させることが好
ましい。また、これらの貴金属、アルミニウム、マグネ
シウムなとの金属元素は、それらの塩（硝酸塩、塩化物
、酢酸塩など）、錯体及びアルコキシドの形状にして溶
液状で酸化物超伝導体粉末に含浸させるのが好ましい。In the above manufacturing method of the present invention, the amount of fine particles of at least one of the group consisting of noble metals, alumina, and magnesia dispersed in the manufactured oxide superconductor is 0.01 to 5 vol% of the total amount. Precious metals (Au,
It is preferable that the oxide superconductor powder is impregnated and supported with a solution containing at least one metal element from the group consisting of Ag, Pt, etc.), aluminum, and magnesium. In addition, metal elements such as these noble metals, aluminum, and magnesium can be impregnated into oxide superconductor powder in the form of their salts (nitrates, chlorides, acetates, etc.), complexes, and alkoxides in the form of solutions. is preferred.
本発明で対象とする酸化物超伝導体としては、Ｌｎ−Ｂ
ａ−Ｃｕ−［］系 （Ｌｎ ： Ｙ、 Ｌａ、 Ｃｅ、
Ｎｄ、 Ｓｍ、 Ｂｕ、 Ｇｄ、 ＴｂＤｙ、 Ｈｏ
、 Ｂｒ、 Ｔｍなどの希土類元素） 、Ｂｉ−（Ｐｂ
）−３ｒ口ａ−Ｃｕ−Ｄ系、Ｔ ｌ−Ｂａ−Ｃａ−Ｃｕ
−０系などがあげられる。The oxide superconductor targeted by the present invention includes Ln-B
a-Cu-[] system (Ln: Y, La, Ce,
Nd, Sm, Bu, Gd, TbDy, Ho
, Br, rare earth elements such as Tm), Bi-(Pb
)-3r-a-Cu-D system, Tl-Ba-Ca-Cu
Examples include -0 series.
微細な貴金属、アルミナ、マグネシアなどの不純物粒子
がピン止を点として作用し、高磁場中においても高い臨
界電流密度を有するようになる。微細な不純物の添加量
を０．０１〜５ｖ０１％としたのは、０．０１ ｖａｔ
％未満でピン止め効果が現われず、５ ｖｏ１％を越え
ると超伝導粒子同志の接触を妨げ、臨界電流密度の低下
を引き起こすた狛である。Fine impurity particles such as noble metals, alumina, and magnesia act as pinning points, resulting in a high critical current density even in a high magnetic field. The amount of fine impurities added is 0.01~5v01%, which is 0.01 vat.
If it is less than 5 vol %, no pinning effect will appear, and if it exceeds 5 vol %, it will prevent contact between superconducting particles and cause a decrease in critical current density.
以下、磁化特性（ピン止め効果が大きくなると磁化曲線
のヒステリシスが大きくなる）及び磁場中での臨界電流
密度の測定を行い、実施例比較例により本発明の効果を
立証する。Hereinafter, the effects of the present invention will be demonstrated using Examples and Comparative Examples by measuring the magnetization characteristics (the hysteresis of the magnetization curve increases as the pinning effect increases) and the critical current density in a magnetic field.
〔実施例１〕
Ｂｉ２Ｓｒ、［ｌ：ａ２Ｃｕ３０ｘ粉末に、０．０１
Ｍ ＡｇＮＯ３水溶液を八ｇとして屹１ ｖｏ１％なる
ように含浸担持した後、乾燥（１５０℃、３０分）、熱
処理（６００ｔ、５時間）した。得られた粉末を直径２
０ｍｍのペレットに加圧成形し、８４５℃で２０時間焼
結した。[Example 1] Bi2Sr, [l:a2Cu30x powder, 0.01
After impregnating and supporting 8 g of M AgNO3 aqueous solution at a concentration of 1 vol., it was dried (150° C., 30 minutes) and heat treated (600 t, 5 hours). The obtained powder is made into a diameter of 2
It was press-molded into a 0 mm pellet and sintered at 845° C. for 20 hours.
得られた焼結体について、振動試料式磁力計を用いて７
７にで磁化測定を行った。結果を第１図に示す。The obtained sintered body was measured using a vibrating sample magnetometer.
Magnetization measurements were carried out in step 7. The results are shown in Figure 1.
〔比較例１〕
実施例１の比較として銀を添加せずに、実施例１と同様
に焼結体を作製し、磁化測定を行った。結果を第１図に
併記する。[Comparative Example 1] As a comparison with Example 1, a sintered body was produced in the same manner as in Example 1 without adding silver, and the magnetization was measured. The results are also shown in Figure 1.
第１図から銀を添加したものでは磁化のヒステリシスが
大きく、びん止め力が向上したことは明らかである。From FIG. 1, it is clear that the hysteresis of magnetization was large in the case of silver-added material, and the bottle-holding force was improved.
〔実施例２〕
添加する物質を塩化金、クロロ白金酸、硝酸アルミニウ
ム、硝酸マグネシウムとした以外は実施例１と同じ条件
で行った。[Example 2] The same conditions as in Example 1 were conducted except that the substances added were gold chloride, chloroplatinic acid, aluminum nitrate, and magnesium nitrate.
その結果、実施例１と同様に第２図に示すようなヒステ
リシスの増加が確認された。As a result, as in Example 1, an increase in hysteresis as shown in FIG. 2 was confirmed.
〔実施例３〕
酸化物超伝導体をＬｎＢａｚＣｕＪｘ （Ｌｎ ： Ｙ
、 Ｌａ、 Ｃｅ。[Example 3] The oxide superconductor was LnBazCuJx (Ln: Y
, La, Ce.
Ｎｄ、Ｓｍ、Ｂｕ、Ｇｄ、Ｔｂ、Ｄｙ、Ｈａ、Ｅｒ、Ｔ
ｍ） 、ＴＩｚＢａ＊Ｃａ２ＣＬ１３０Ｘとし、実施例
１と同様に銀を添加して、それぞれ、９２０℃、９００
℃で２０時間焼結した。得られた焼結体について磁化測
定（７７Ｋ）を行った結果、いずれについても無添加と
比べて磁化のヒステリシスの増加が確認された。Nd, Sm, Bu, Gd, Tb, Dy, Ha, Er, T
m), TIzBa*Ca2CL130X, silver was added in the same manner as in Example 1, and the mixture was heated at 920°C and 900°C, respectively.
It was sintered at ℃ for 20 hours. As a result of magnetization measurement (77K) of the obtained sintered bodies, an increase in magnetization hysteresis was confirmed in all cases compared to the case without additives.
〔実施例４〕
実施例１において銀の添加量を０．００５．０．０１１
．５，１０ｖｏ１％として焼結体を作製し、７７にで磁
化測定及び直流４端子法による臨界電流密度測定を行っ
た。銀添加量に対する磁化のヒステリシス、臨界電流密
度の変化（いずれも０、５ Ｔにおける）を第３図に示
す。[Example 4] In Example 1, the amount of silver added was 0.005.0.011
．． A sintered body was prepared with a concentration of 5.10 vol. 1%, and magnetization measurements and critical current density measurements were performed using the DC 4-probe method. FIG. 3 shows the changes in magnetization hysteresis and critical current density (both at 0 and 5 T) with respect to the amount of silver added.
第３図より、磁化のヒステリシスは添加量の増加に伴い
増加するが、１Ｑｖｏ１％では粒同志の接触を妨げるた
めか臨界電流密度が低下しており、銀添加量としては０
．０１〜５ ｖｏ１％が適当であると言える。From Figure 3, the magnetization hysteresis increases as the amount of silver added increases, but at 1Qvo1%, the critical current density decreases, probably because it prevents contact between grains, and the amount of silver added is 0.
．． It can be said that 01-5 vo1% is appropriate.
銀量外の添加においても同様の傾向が認められる。A similar tendency is observed for additions other than the amount of silver.
以上のように、本発明によれば酸化物超伝導体に含浸法
で特定の添加物を分散させることによりピン止め効果が
向上し、高磁場中でも高い臨界電流密度を有する超伝導
体の作製が可能となる。As described above, according to the present invention, the pinning effect is improved by dispersing specific additives into an oxide superconductor using an impregnation method, and it is possible to create a superconductor that has a high critical current density even in a high magnetic field. It becomes possible.
第１図及び第２図は本発明の一実施例としての特定の添
加物の有無による磁化特性の変化を示した図表、第３図
は本発明の一実施例としての銀添加量に対するピン止め
効果（磁化ヒステリシス、臨界電流密度）の変化を示し
た図表である。Figures 1 and 2 are charts showing changes in magnetization characteristics depending on the presence or absence of specific additives as an example of the present invention, and Figure 3 is a diagram showing the pinning of the amount of silver added as an example of the present invention. It is a chart showing changes in effects (magnetization hysteresis, critical current density).
Claims (3)
のうちの少なくとも１種以上の金属元素を含む溶液を酸
化物超伝導体粉末に含浸担持させた後、焼結を行うこと
を特徴とする酸化物超伝導体の製造方法。(1) Oxide superconductor powder is impregnated with a solution containing at least one metal element from the group consisting of noble metals, aluminum, and magnesium, and then sintered. Method of manufacturing conductors.
属、アルミナ、マグネシアよりなる群のうちの少なくと
も１種以上の微粒子の量が、全量の０．０１〜５ｖｏｌ
％であることを特徴とする請求項（１）記載の酸化物超
伝導体の製造方法。(2) The amount of fine particles of at least one of the group consisting of noble metals, alumina, and magnesia impregnated and supported and dispersed in the oxide superconductor is 0.01 to 5 vol of the total amount.
% of the oxide superconductor according to claim 1.
：希土類元素）、Ｂｉ−（Ｐｂ）−Ｓｒ−Ｃａ−Ｃｕ−
Ｏ系、Ｔｌ−Ｂａ−Ｃａ−Ｃｕ−Ｏ系よりなる群のうち
の１種であることを特徴とする請求項（１）記載の酸化
物超伝導体の製造方法。(3) The oxide superconductor is Ln-Ba-Cu-O system (Ln
: rare earth elements), Bi-(Pb)-Sr-Ca-Cu-
2. The method for producing an oxide superconductor according to claim 1, wherein the oxide superconductor is one of the group consisting of O type and Tl-Ba-Ca-Cu-O type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2247359A JPH0768062B2 (en) | 1990-09-19 | 1990-09-19 | Manufacturing method of oxide superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2247359A JPH0768062B2 (en) | 1990-09-19 | 1990-09-19 | Manufacturing method of oxide superconductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04130045A true JPH04130045A (en) | 1992-05-01 |
| JPH0768062B2 JPH0768062B2 (en) | 1995-07-26 |
Family
ID=17162250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2247359A Expired - Lifetime JPH0768062B2 (en) | 1990-09-19 | 1990-09-19 | Manufacturing method of oxide superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0768062B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012038526A (en) * | 2010-08-05 | 2012-02-23 | Kyushu Univ | RE1Ba2Cu3O7-z SUPERCONDUCTOR |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63291857A (en) * | 1987-05-05 | 1988-11-29 | アメリカン テレフォン アンド テレグラフ カムパニー | Superconductor |
| JPS6421034A (en) * | 1987-03-31 | 1989-01-24 | Sumitomo Electric Industries | Superconductive composite body |
-
1990
- 1990-09-19 JP JP2247359A patent/JPH0768062B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6421034A (en) * | 1987-03-31 | 1989-01-24 | Sumitomo Electric Industries | Superconductive composite body |
| JPS63291857A (en) * | 1987-05-05 | 1988-11-29 | アメリカン テレフォン アンド テレグラフ カムパニー | Superconductor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012038526A (en) * | 2010-08-05 | 2012-02-23 | Kyushu Univ | RE1Ba2Cu3O7-z SUPERCONDUCTOR |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0768062B2 (en) | 1995-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jin et al. | Superconductivity in the Bi‐Sr‐Ca‐Cu‐O compounds with noble metal additions | |
| JP2610939B2 (en) | Superconductor manufacturing method | |
| Schneemeyer et al. | Magnetic studies of strontium lanthanum copper oxides | |
| Markert et al. | Superconductivity in La2− xNaxCuO4− y | |
| JPH03141512A (en) | Oxide superconductor | |
| US5206211A (en) | Process for the production of an elongate body consisting of longitudinally aligned acicular crystals of a superconducting material | |
| JPH04130045A (en) | Production of oxide superconductor | |
| Pramanik et al. | Coprecipitation method for preparation of superconducting YBa2Cu3Ox compounds | |
| McGinn et al. | Microstructure and magnetic properties of zone melt textured YBa2Cu3O6+ x with BaSnO3 additions | |
| Baliga et al. | Enhanced grain growth in YBa 2 Cu 3 O 7− δ doped with Ag, Cu, and CuO | |
| Agarwala et al. | Synthesis of High‐Tc Dual‐Phase Ag–YBa2Cu3O7–x Superconductor Composite Powders by Sol–Gel Process | |
| Moon et al. | High‐density Bi‐Pb‐Sr‐Ca‐Cu‐O superconductor prepared by rapid thermal melt processing | |
| JPS63285155A (en) | Oxide type superconductive material and production thereof | |
| Pramanik et al. | Rare-earth based superconductors by organic carbonate coprecipitation | |
| JP3102010B2 (en) | Thallium oxide superconducting wire | |
| JP2966134B2 (en) | Method for producing Bi-based oxide superconductor | |
| JP2749194B2 (en) | Method for producing Bi-Sr-Ca-Cu-O-based superconductor | |
| JP2727565B2 (en) | Superconductor manufacturing method | |
| JP2549669B2 (en) | Oxide superconducting wire | |
| JP2854338B2 (en) | Copper oxide superconductor | |
| JPH01131049A (en) | Ceramic superconductor | |
| JP3450488B2 (en) | Boron-containing metal oxide superconducting wire | |
| JPH0426014A (en) | Oxide superconducting wire and its manufacture | |
| JPH0940421A (en) | Production of oxide superconducting material | |
| JPH07277730A (en) | High damping oxide superconducting material and its production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |