JPH03290318A - Oxide superconductor and production thereof - Google Patents
Oxide superconductor and production thereofInfo
- Publication number
- JPH03290318A JPH03290318A JP2089617A JP8961790A JPH03290318A JP H03290318 A JPH03290318 A JP H03290318A JP 2089617 A JP2089617 A JP 2089617A JP 8961790 A JP8961790 A JP 8961790A JP H03290318 A JPH03290318 A JP H03290318A
- Authority
- JP
- Japan
- Prior art keywords
- oxide superconductor
- magnetic field
- range
- calcined
- raw materials
- 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
- 239000002887 superconductor Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 10
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910052788 barium Inorganic materials 0.000 claims abstract description 8
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 239000011777 magnesium Substances 0.000 claims description 8
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract description 9
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 4
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 abstract description 4
- 238000001354 calcination Methods 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 3
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- 229910000018 strontium carbonate Inorganic materials 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract 2
- 239000011369 resultant mixture Substances 0.000 abstract 2
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 abstract 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940103357 calcium arsenate Drugs 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229940030341 copper arsenate Drugs 0.000 description 1
- RKYSWCFUYJGIQA-UHFFFAOYSA-H copper(ii) arsenate Chemical compound [Cu+2].[Cu+2].[Cu+2].[O-][As]([O-])([O-])=O.[O-][As]([O-])([O-])=O RKYSWCFUYJGIQA-UHFFFAOYSA-H 0.000 description 1
- 229960004643 cupric oxide Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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） 本発明は酸化物超電導体及びその製造法罠関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an oxide superconductor and its manufacturing method.
（従来の技術） 従来の酸化物超電導体としてａ、１９８８年。(Conventional technology) a, 1988 as a conventional oxide superconductor.
金属材料技術研究所の前出総合研究官らによって発見さ
れたビスマス、ストロンチウム、カルシウム及び銅を主
成分とするＢｉ −Ｓｒ −Ｃａ −Ｃｕ−０系（以下
Ｂｉ系とする）の酸化物超電導体があるが。A Bi-Sr-Ca-Cu-0 (hereinafter referred to as Bi-based) oxide superconductor whose main components are bismuth, strontium, calcium, and copper, discovered by the above-mentioned research staff of the Institute of Metals and Materials Technology. Although there is.
このＢｉ系の酸化物超電導体は、電気抵抗が零になる臨
界温度（以下、Ｚｅｒｏとする）が１１０に付近の２２
２３相が生成しにくいという問題があった。This Bi-based oxide superconductor has a critical temperature (hereinafter referred to as "Zero") at which the electrical resistance becomes zero at around 110 and 22
There was a problem that 23 phases were difficult to generate.
この念めＴ：”’ ４”ｔ ８０ Ｋ付近と低いながら
も生成温度領域が広い２２１２相を用いたＢｉ系の酸化
物超電導体が一般に知られている。To keep this in mind, Bi-based oxide superconductors using the 2212 phase are generally known, which have a low temperature around t 80 K but a wide formation temperature range.
（発明が解決しようとする課題） しかしながら上記のＢｉ系の酸化物超電導体は。(Problem to be solved by the invention) However, the above Bi-based oxide superconductor.
Ｙ−Ｂａ−Ｃｕ−０系（以下Ｙ系とする）の酸化物超電
導体に比べ磁場の印加によって臨界電流密度（以下Ｊｃ
とする）が低下し易いという問題があシ。Compared to the Y-Ba-Cu-0 system (hereinafter referred to as Y system) oxide superconductor, the critical current density (hereinafter referred to as Jc
There is a problem in that the value (supposed to be
超電導電磁石、超電導磁気シールド材への適用の面で不
利であった。This was disadvantageous in terms of application to superconducting electromagnets and superconducting magnetic shielding materials.
本発明は従来の２２１２相を用い７ｔＢｉ系の酸化物超
電導体に比べ磁場の印加によるＪｃが低下しに〈〈、か
つ耳ｅ ｒ Ｏも従来の２２１２相と変わらないＢｉ系
の酸化物超電導体及びその製造法を提供するものである
。The present invention uses the conventional 2212 phase to create a Bi-based oxide superconductor which has a lower Jc due to the application of a magnetic field than a 7tBi-based oxide superconductor, and also has the same e r O as the conventional 2212-phase. and a manufacturing method thereof.
（課題を解決するための手段）
本発明者らは、上記の欠点について糧々検討した結果、
磁場中で超電導状態を長く保ちつづけ、かつＪｃを低下
させないためには、超電導体中にビン留めする点９例え
ば不純物、添加物、格子欠陥等を設は磁束線の自由な動
きを止めることがその対策として適切であると考え、さ
らに検討を進めた結果ｊ＃！化物超電導体の元素置換に
よシ、結晶格子のゆがみ、欠陥などが生成すれば、これ
らがビン留め点になシ磁場中での特性向上に寄与できる
ものと考えた。またさらに検討を進め之結果、Ｍｇ。(Means for Solving the Problem) As a result of intensive study on the above-mentioned drawbacks, the present inventors found that
In order to maintain the superconducting state for a long time in a magnetic field and to prevent Jc from decreasing, it is necessary to introduce impurities, additives, lattice defects, etc. into the superconductor to stop the free movement of the magnetic flux lines. We thought that this was an appropriate countermeasure, and after further consideration, we found that j#! We thought that if elements such as crystal lattice distortion, defects, etc. are generated by element substitution in a compound superconductor, these could serve as binding points and contribute to improving the properties in a magnetic field. As a result of further investigation, Mg.
Ｂａを含有した２２１２相のＢｉ系酸化物超電導体は従
来のものに比べ磁場の印加によって低下しにくいことを
見い出し本発明を完成するに至った。It was discovered that a 2212-phase Bi-based oxide superconductor containing Ba is less susceptible to deterioration due to the application of a magnetic field than conventional ones, and the present invention was completed.
本発明はビスマス、ストロンチウム、カルシウム、マグ
ネシウム、バリウム及び銅を主成分とし。The main ingredients of the present invention are bismuth, strontium, calcium, magnesium, barium, and copper.
一般式Ｂｉｌ、ｇ ＳｒＡＣａｓＭｇｏＢａｎＣｕｔｏ
ｔｏ−ｔｓＯＸ （但しＡ＝ ０．６〜１．３．Ｂ＝０
．３〜０．９．Ｃ＝０．０１〜０．３．Ｄ＝０．０１〜
０．３．数字は原子比を表わす）で示される組成から々
る酸化物超電導体り及び上記の組成となるようにビスマ
ス、ストロンチウム。General formula Bil, g SrACasMgoBanCuto
to-tsOX (However, A=0.6~1.3.B=0
．． 3-0.9. C=0.01-0.3. D=0.01～
0.3. (Numbers represent atomic ratios) oxide superconductors with compositions shown in Table 1) and bismuth and strontium with the above compositions.
カルシウム、マグネシウム、バリウム及び銅を含む各原
料を秤量し、ついで混合した後、仮焼、粉砕し、さらに
成形後焼成する酸化物超電導体の製造法に関する。The present invention relates to a method for producing an oxide superconductor, in which raw materials containing calcium, magnesium, barium, and copper are weighed, mixed, calcined, pulverized, molded, and then fired.
本発明において酸化物超電導体を構成する生成物のビス
マス、ストロンチウム、カルシウム、マグネシウム、バ
リウム及び銅を含む原料（出発原料）については特に制
限はないが１例えば、酸化物、炭酸塩、硝酸塩、蓚酸塩
等の１種又は２種以上が用すられる。In the present invention, there are no particular restrictions on the raw materials (starting raw materials) containing bismuth, strontium, calcium, magnesium, barium, and copper that constitute the oxide superconductor; for example, oxides, carbonates, nitrates, oxalic acid One or more salts may be used.
一般式Ｂｉ １，０８ｒｌ ＣａＢ Ｍｇ□ Ｂａｐ
ｃｕｌ、ｏ±ｔｔ１５において。General formula Bi 1,08rl CaB Mg□ Bap
in cul, o±tt15.
Ａは原子比でα６〜Ｌ３の範囲とされ、０．６未満であ
ると超電導体含有率が低下し、かつ７７に以上で安定し
て電気抵抗を零にすることが困難であ、？、１．３を超
えると超電導体以外の結晶、ガラス等の異相が生成し易
＜ 、 Ｔ：ｅｒｏが低下する。A is in the range of α6 to L3 in terms of atomic ratio, and if it is less than 0.6, the superconductor content decreases, and if it is 77 or more, it is difficult to stably reduce the electrical resistance to zero. , exceeds 1.3, foreign phases such as crystals other than superconductors, glass, etc. are likely to be generated, and T: ero decreases.
またＢは原子比で０．３〜０．９の範囲とされ、０．３
未満であると超電導体含有率が低下し、かつ７７に以上
で安定して電気抵抗を零九することが困難であ！２，０
．９を超えると超電導体以外の結晶、ガラス等の異相が
生成し易＜、 Ｔ：ｅｒｏが低下する。In addition, B has an atomic ratio in the range of 0.3 to 0.9, and 0.3
If it is less than 77, the superconductor content will decrease, and if it is more than 77, it will be difficult to stably reduce the electrical resistance to zero. 2,0
．． When it exceeds 9, foreign phases such as crystals other than superconductors and glass are likely to be formed. T: ero decreases.
さらにＣ及びＤは原子比でいずれも０．０１〜０．３の
範囲とされ、０．０１未満であると顕著な効果が認めら
れず、０．３ＪえるとＢａＣｕαｚ、 ＢａＢ１０ｚ等
の異相が生成し易いという欠点がある。Furthermore, the atomic ratio of C and D is both in the range of 0.01 to 0.3, and if it is less than 0.01, no significant effect will be observed, and if it exceeds 0.3 J, different phases such as BaCuαz and BaB10z will be generated. It has the disadvantage of being easy to do.
混合方法については特に制限はないが９例えば合成樹脂
製のボールミル内に合成樹脂で被覆し九ボール、エタノ
ール、メタノール等の溶媒及び原料を充填し、湿式混合
することが好ましい。There are no particular restrictions on the mixing method, but it is preferable to wet-mix, for example, by coating a ball mill made of synthetic resin with a synthetic resin, filling the ball mill with a solvent such as ethanol or methanol, and raw materials.
仮焼条件において、仮焼温度は各原料の配合割合などに
よシ適宜選定されるが、７８０〜８３０℃の範囲で仮焼
することが好ましく、また仮焼雰囲気は、大気中、酸素
雰囲気中、真空中、還元雰囲気中等で仮焼することがで
き特に制限はない。Regarding the calcination conditions, the calcination temperature is appropriately selected depending on the blending ratio of each raw material, etc., but it is preferable to calcinate in the range of 780 to 830°C, and the calcination atmosphere is air or oxygen atmosphere. , in a vacuum, in a reducing atmosphere, etc., and there are no particular restrictions.
粉砕及び成形については特に制限はなく、従来公知の方
法で行うものとする。There are no particular restrictions on crushing and molding, and conventionally known methods may be used.
焼成条件において、焼成温度は各原料の配合割合などに
よう適宜選定されるが、８２０〜８７０℃の範囲で焼成
することが好ましく、また焼成雰囲気は、大気中、空気
気流中、または低酸素圧雰囲気中（酸素の含有量が１〜
２０体積チ好ましくは２〜２０体積チの範囲）で焼成す
ることが好ましい。Regarding the firing conditions, the firing temperature is appropriately selected depending on the blending ratio of each raw material, etc., but it is preferable to fire in the range of 820 to 870°C, and the firing atmosphere is air, air current, or low oxygen pressure. In the atmosphere (oxygen content is 1~
It is preferable to fire in a range of 20 volume squares, preferably 2 to 20 volume squares.
本発明の組成においてＯ（酸素）の量は、ＣｕＯ量及び
Ｃｕの酸化状態によって定まる。しかし酸化状態がどの
ようになっているかを厳密にそして精度よく測定するこ
とができず本発明においてはＸで表わされる。In the composition of the present invention, the amount of O (oxygen) is determined by the amount of CuO and the oxidation state of Cu. However, it is not possible to measure the oxidation state strictly and accurately, so it is represented by X in the present invention.
（実施例） 以下本発明の詳細な説明する。(Example) The present invention will be explained in detail below.
実施例１〜５
ビスマス、ストロンチウム、マグネシウム、バリウム、
カルシウム及び銅の比率が原子比で第１表に表わす組成
になるように三酸化ビスマス（高純度化学研究所製、純
度９９．９％）、炭酸ストロンチウム（レアメタリック
製、純度９９．’ｌ）ｊ酸化マグネシウム（高純度化学
研究所友、純度９９．９ ％ ） 、炭酸バリウム（高
純度化学研究新製。Examples 1 to 5 Bismuth, strontium, magnesium, barium,
Bismuth trioxide (manufactured by Kojundo Kagaku Kenkyujoku, purity 99.9%) and strontium carbonate (manufactured by Rare Metallic, purity 99.'l) were added so that the ratio of calcium and copper would be as shown in Table 1 in terms of atomic ratio. j Magnesium oxide (Kojundo Kagaku Kenkyu Tomo, purity 99.9%), barium carbonate (Newly manufactured by Kojundo Kagaku Kenkyu.
純度９９．９％）、炭酸カルシウム（高純度化学研究所
裂、純度９９．９チ）及び酸化第二銅（高純度化学研究
新製、純度９９．９チ）を秤量し出発原料とした。(purity 99.9%), calcium carbonate (Kojundo Kagaku Kenkyu Shinsei, purity 99.9%), and cupric oxide (Kojundo Kagaku Kenkyushin Co., Ltd., purity 99.9%) were weighed and used as starting materials.
次に上記の出発原料を合成樹脂製のボールミル内に合成
樹脂で被覆した鋼球ボール及びメタノールと共に充填し
、毎分５０回転の条件で７２時時間式混合した。乾燥後
アルミナ匣鉢に入れ電気炉を用いて大気中で８００℃で
１０時間仮焼しついで乳鉢で粗粉砕して酸化物超電導体
用組成物を得友。この後肢酸化物超電導体用組成物を１
４７ＭＰａの圧力で直径３０ｍ、厚さ１閣のペレットに
プレス成形後１体積比で０２： Ｎ２＝ １ ＋ １０
の低酸素雰囲気中で８４５℃で１００時間焼成してＢｉ
系の酸化物超電導体を得た。この後四端子法でｒｐｇｅ
ｒｏ及び磁場中でＪｃを測定した。その結果を第３表に
示す。Next, the above starting materials were filled into a synthetic resin ball mill together with steel balls coated with synthetic resin and methanol, and mixed for 72 hours at 50 revolutions per minute. After drying, the mixture was placed in an alumina sagger, calcined in the air at 800°C for 10 hours using an electric furnace, and coarsely ground in a mortar to obtain a composition for an oxide superconductor. This composition for hindlimb oxide superconductor
After press-forming into pellets with a diameter of 30 m and a thickness of 1 cm at a pressure of 47 MPa, the volume ratio is 02: N2 = 1 + 10
Bi
A system oxide superconductor was obtained. After this, rpge using the four terminal method
Jc was measured in ro and magnetic field. The results are shown in Table 3.
比較例１〜５
ビスマス、ストロンチウム、カルシウム及ヒ銅の比率が
原子比で第２表に表わす組成となるよう〜・ぐ
「
評価をした。Comparative Examples 1 to 5 Evaluations were conducted so that the ratios of bismuth, strontium, calcium, and copper arsenate were as shown in Table 2 in terms of atomic ratio.
その結果を合わせて第３表に示す。The results are shown in Table 3.
【
第３表から明らかなように本発明の実施例になるＢｉ系
の酸化物超電導体は、磁場の印加によるＪｃつ低下が少
なく、 Ｔ：ｅｒｏも８２に以上と従来の２２１２相と
変わらないことがわかる。これに対−従来のＢｉ系の酸
化物超電導体は、Ｔ♂ｒ０は８１（以上で従来の２２１
２相と変わらないが、磁場の印加によシＪＣが著しく低
下したことがわかる。[As is clear from Table 3, the Bi-based oxide superconductor according to the embodiment of the present invention has a small decrease in Jc due to the application of a magnetic field, and has a T:ero of 82 or more, which is the same as the conventional 2212 phase. I understand that. In contrast, the conventional Bi-based oxide superconductor has T♂r0 of 81 (which is above 221
Although it is the same as the two-phase case, it can be seen that the JC significantly decreased due to the application of the magnetic field.
（発明の効果）
本発明になる酸化物超電導体は、磁場の印加によるＪｃ
の低下が少なく、かつ耳ｅ ｒＯも従来の２２１２相と
変わらず、工業的に極めて好適な酸化物超電導体である
。(Effects of the Invention) The oxide superconductor of the present invention has Jc
It is an oxide superconductor that is industrially very suitable, as it has a small decrease in phase and has the same 2212 phase as the conventional 2212 phase.
Claims (2)
ウム，バリウム及び銅を主成分とし，一般式Ｂｉ＿１＿
．＿０Ｓｒ＿ＡＣａ＿ＢＭｇ＿ＣＢａ＿ＤＣｕ＿１＿．
＿０＿±＿０＿．＿１＿５Ｏ＿Ｘ（但しＡ＝０．６〜１
．３，Ｂ＝０．３〜０．９，Ｃ＝０．０１〜０．３，Ｄ
＝０．０１〜０．３，数字は原子比を表わす）で示され
る組成からなる酸化物超電導体。1. The main components are bismuth, strontium, calcium, magnesium, barium and copper, with the general formula Bi_1_
．． _0Sr_ACa_BMg_CBa_DCu_1_.
＿0＿±＿0＿. _1_5O_X (However, A=0.6~1
．． 3, B=0.3~0.9, C=0.01~0.3, D
= 0.01 to 0.3, numbers represent atomic ratios).
ンチウム，カルシウム，マグネシウム，バリウム及び銅
を含む各原料を秤量し，ついで混合した後，仮焼，粉砕
し，さらに成形後焼成することを特徴とする酸化物超電
導体の製造法。2. Each raw material containing bismuth, strontium, calcium, magnesium, barium, and copper is weighed so as to have the composition according to claim 1, and then mixed, calcined, pulverized, and further shaped and fired. Method for manufacturing oxide superconductors.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2089617A JPH03290318A (en) | 1990-04-04 | 1990-04-04 | Oxide superconductor and production thereof |
| US07/679,318 US5238911A (en) | 1990-04-04 | 1991-04-02 | Oxide superconductor Bi--Sr--Ca--Mg--Ba--Cu--O |
| EP91302995A EP0450966B1 (en) | 1990-04-04 | 1991-04-04 | Oxide superconductor and process for production thereof |
| DE69114164T DE69114164T2 (en) | 1990-04-04 | 1991-04-04 | Superconducting oxide and process for its production. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2089617A JPH03290318A (en) | 1990-04-04 | 1990-04-04 | Oxide superconductor and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03290318A true JPH03290318A (en) | 1991-12-20 |
Family
ID=13975714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2089617A Pending JPH03290318A (en) | 1990-04-04 | 1990-04-04 | Oxide superconductor and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03290318A (en) |
-
1990
- 1990-04-04 JP JP2089617A patent/JPH03290318A/en active Pending
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