JPH01313326A - Superconductor and production thereof - Google Patents
Superconductor and production thereofInfo
- Publication number
- JPH01313326A JPH01313326A JP63141621A JP14162188A JPH01313326A JP H01313326 A JPH01313326 A JP H01313326A JP 63141621 A JP63141621 A JP 63141621A JP 14162188 A JP14162188 A JP 14162188A JP H01313326 A JPH01313326 A JP H01313326A
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- current density
- bismuth
- copper
- strontium
- 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 33
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000000843 powder Substances 0.000 claims abstract description 23
- XMFOQHDPRMAJNU-UHFFFAOYSA-N lead(II,IV) oxide Inorganic materials O1[Pb]O[Pb]11O[Pb]O1 XMFOQHDPRMAJNU-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 16
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 16
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000007858 starting material Substances 0.000 claims abstract description 6
- 238000001354 calcination Methods 0.000 claims abstract description 4
- 239000011575 calcium Substances 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 13
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000010304 firing Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 229910052745 lead Inorganic materials 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 229910000416 bismuth oxide Inorganic materials 0.000 description 3
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 3
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910000018 strontium carbonate Inorganic materials 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 239000005751 Copper oxide Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229910014454 Ca-Cu Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 101100194003 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) rco-3 gene Proteins 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 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
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の目的〕
（産業上の利用分野）
本発明は超電導体に係わり、特に高磁場マグネット、限
流器、磁気推進装置等のエネルギー機器に使用するのに
好適な電流密度のバラツキの小さい超電導体およびその
製造方法に関する。[Detailed Description of the Invention] (Objective of the Invention) (Industrial Application Field) The present invention relates to superconductors, and particularly to superconductors suitable for use in energy equipment such as high-field magnets, current limiters, and magnetic propulsion devices. The present invention relates to a superconductor with small variations in current density and a method for manufacturing the same.
（従来の技術）
最近、ビスマス（Ｂｉ）Ｏストロンチウム（Ｓｒ）Ｏカ
ルシウム（Ｃａ）Ｏ銅（Ｃｕ）からなるＢ１−５ｒ−Ｃ
ａ−Ｃｕ−０系（四成分金属酸化物系）超電導体材料が
出現し、更にほこの超電導材料の８１の一部を釦（Ｐｂ
）で置換することにより、より高い臨界温度Ｔｃ（１０
７Ｋ）を有する高温超電導材料が開発された。（例えば
、粉体粉末冶金６３年度春季大会）これは、従来のＹ−
Ｏａ−Ｃｕ−０系の高温超電導体（臨界温度Ｔｃ９０Ｋ
）に比べても高い臨界温度を有しており、また高価なイ
ットリウム、バリウ１１のような原料を用いなくても良
いため注目を浴びている。高温用’Ｒ導体を利用したも
のに、例えば超電導線材がある。これは、焼成後超電導
特性を示す原料を混合・造粒、仮焼した後、粉砕し、銀
等のシース材に充填し、圧延。(Prior art) Recently, B1-5r-C consisting of bismuth (Bi) O strontium (Sr) O calcium (Ca) O copper (Cu)
A-Cu-0 type (four-component metal oxide type) superconductor material appeared, and a part of 81 of the superconducting material was further converted into button (Pb
), the higher critical temperature Tc(10
7K) has been developed. (For example, Powder Metallurgy 1963 Spring Conference) This is a traditional Y-
Oa-Cu-0 system high temperature superconductor (critical temperature Tc90K
), and it is attracting attention because it does not require the use of expensive raw materials such as yttrium and barium-11. For example, there is a superconducting wire that utilizes a high-temperature 'R conductor. This involves mixing, granulating, and calcining raw materials that exhibit superconducting properties after firing, then crushing them, filling them in a sheath material such as silver, and rolling them.
再熱処理して、線材化したものであるにの超電導線材は
加工性にも優れ、超電導特性も良好であり、大型・高磁
場マグネットなどの超電導体として大変優れている。Superconducting wire, which has been reheated and made into wire, has excellent workability and good superconducting properties, making it an excellent superconductor for large, high-field magnets, etc.
（発明が解決しようとする課題）
ところが、Ｂ１−Ｐｂ−５ｒ−Ｃａ−Ｃｕ−０系超電導
体には、次のような解決すべき課題がある。即ち、高い
臨界温度を有する超電導体を得るには長時間の焼結が必
要で、またセラミックス一般の製造方法である同相反応
法では高い臨界温度を有する超電導体ができにくい。そ
のため、ロット毎に９！Ａ遺された超電導体に流せる電
流密度に大きなバラツキが生じる。このことは超電導体
をエネルギー機器に使用した場合、超電導線が安定した
電流密度が得られないことになり、安定した゛電流密度
を有する超電導体が望まれていた。(Problems to be Solved by the Invention) However, the B1-Pb-5r-Ca-Cu-0 based superconductor has the following problems to be solved. That is, obtaining a superconductor with a high critical temperature requires long sintering, and it is difficult to produce a superconductor with a high critical temperature using the in-phase reaction method, which is a common manufacturing method for ceramics. Therefore, 9 per lot! A: Large variations occur in the current density that can be passed through the remaining superconductor. This means that when a superconductor is used in an energy device, a stable current density cannot be obtained from the superconducting wire, and a superconductor having a stable current density has been desired.
本発明は上記要望に鑑みなされたもので、電流密度のバ
ラツキの小さい安定した特性を有する超電導体およびそ
の製造方法を提供することを目的とするものである。The present invention was made in view of the above-mentioned needs, and it is an object of the present invention to provide a superconductor having stable characteristics with little variation in current density, and a method for manufacturing the same.
（課題を解決するための手段）
かかる目的を達成するために１本発明は、ビスマス（８
１）Ｏ鉛（Ｐｂ）Ｏストロンチウム（Ｓｒ）Ｏカルシウ
ム（Ｃａ）Ｏ銅（Ｃｕ）Ｏ酸素（Ｏ）から成る酸化物超
電導体において、少なくとも釦の出発原料を四酸化三鉛
（Ｐｂ、 ｏ、 ）を用いることを特徴とする。(Means for Solving the Problems) In order to achieve the above object, one aspect of the present invention is to use bismuth (8
1) In an oxide superconductor consisting of O lead (Pb) O strontium (Sr) O calcium (Ca) O copper (Cu) O oxygen (O), at least the starting material for the button is trilead tetroxide (Pb, o, ).
（作 用）
鉛の出発原料に四酸化三鉛（Ｐｂ３Ｏ、）を用いること
により、四酸化三鉛の分解過程で放出する酸素により、
超電導体の酸素欠損をおぎない、電流密度のバラツキを
少なくすることができる。(Function) By using trilead tetroxide (Pb3O, ) as the starting material for lead, the oxygen released during the decomposition process of trilead tetroxide
It is possible to prevent oxygen vacancies in the superconductor and reduce variations in current density.
（実 施 例） 以下に本発明の第１の実施例を詳細に説明する。(Example) A first embodiment of the present invention will be described in detail below.
まず、酸化ビスマス（ＢｉａＯ３）ｔ 炭酸ストロン
チウム（ＳｒＣＯ，）Ｏ炭酸カルシウム（ＣａＣＯ，）
、酸化銅（Ｃｕｂ） 、さらに四酸化三鉛（Ｐｂ、
ｏ４）の粉末をそれぞれＢｉｎ、、Ｐｂ０．．５ｒ１Ｃ
ａ１Ｃｕ、、、Ｏｙの組成比の割合で秤量する。これら
の原料粉末を十分に混合した後、この粉末を空気中で８
５０℃で焼成する。この工程によりＢ１−Ｐｂ−５ｒ−
Ｃａ−Ｃｕ五酸成分金属酸化物形成される。さらに、こ
の仮焼粉をアセトンとともに混器・粉砕した後、酸素雰
囲気中で８５０℃で熱処理する。そしてこの粉末をアセ
トンと共に粉砕し、微細粉を得る。この粉末を銀製のシ
ースに充填し。First, bismuth oxide (BiaO3), strontium carbonate (SrCO,), calcium carbonate (CaCO,)
, copper oxide (Cub), and trilead tetroxide (Pb,
o4) powders as Bin, , Pb0. ．． 5r1C
It is weighed according to the composition ratio of a1Cu, . . . Oy. After thoroughly mixing these raw material powders, this powder is heated in air for 80 minutes.
Bake at 50°C. Through this step, B1-Pb-5r-
A Ca-Cu pentate component metal oxide is formed. Furthermore, this calcined powder is mixed with acetone and crushed, and then heat-treated at 850° C. in an oxygen atmosphere. This powder is then ground with acetone to obtain a fine powder. Fill a silver sheath with this powder.
冷間圧延法により引伸し、再熱処理して超電導線材を得
る。The superconducting wire is drawn by cold rolling and reheated to obtain a superconducting wire.
このようにして得られた超電導線材の複数のロフトの電
流密度特性を第１図に示す、第１図において縦軸には分
布度数を、横軸には電流密度のバラツキをそれぞれとり
１曲線Ａは、従来の鉛の出発原料として酸化鉛（Ｐｂｏ
）を用いた場合を示し、曲線Ｂは本発明の鉛の出発材料
として四酸化三鉛（Ｐｂ３Ｏ４）を用いた場合を示す。The current density characteristics of multiple lofts of the superconducting wire obtained in this way are shown in Figure 1. In Figure 1, the vertical axis represents the distribution frequency, and the horizontal axis represents the variation in current density. Lead oxide (Pbo) is used as the conventional starting material for lead.
) is used, and curve B shows the case where trilead tetroxide (Pb3O4) is used as the starting material for lead of the present invention.
この結果かられかるように、本実施例における超電導体
はロット毎の電流密度のバラツキが小さく安定している
とともに、電流密度が改善されている。このように、安
定した電流密度を有することは超電導マグネット、超電
導限流器等の超電導エネルギー機器を作る上で重要であ
る。As can be seen from these results, in the superconductor of this example, the variation in current density from lot to lot is small and stable, and the current density is improved. Thus, having a stable current density is important in producing superconducting energy devices such as superconducting magnets and superconducting current limiters.
このようにロフト毎の電流密度のバラツキが小さくなっ
た理由は、概略以下のように考えられる。The reason why the variation in current density for each loft is reduced in this way is considered to be roughly as follows.
酸化物系超電導体は焼成時の酸素分圧の微妙な変化で酸
素含有率が変化し、この酸素含有率の変化が電流密度の
バラツキとなる。そこで比較的低温（４００〜５００℃
）で分解して酸素を放出する四酸化三鉛（Ｐｂｌｏ、
）を用いることにより酸素含有率が雰囲気によらず一定
となり特性が安定する。In oxide superconductors, the oxygen content changes due to subtle changes in oxygen partial pressure during firing, and this change in oxygen content causes variations in current density. Therefore, the temperature is relatively low (400 to 500℃).
Trilead tetroxide (Pblo,
), the oxygen content becomes constant regardless of the atmosphere and the characteristics are stabilized.
さらに本発明における製造方法の第２の実施例を説明す
る。Furthermore, a second embodiment of the manufacturing method according to the present invention will be described.
酸化ビスマス（Ｂｉ２０３）？炭酸ストロンチウム（Ｓ
ｒＣＯ３）−炭酸カルシウム（ＣａＣＯ，） 、酸化銅
（Ｃｕｂ） 。Bismuth oxide (Bi203)? Strontium carbonate (S
rCO3) - Calcium carbonate (CaCO,), copper oxide (Cub).
さらに四酸化三鉛（ＰｂａＯＪの粉末をそれぞれ［３１
１＋、ｔＰｂ６．．５ｒ１Ｃａ、Ｃｕ１．、Ｏｙの組成
比の割合で秤量する。Furthermore, powder of trilead tetroxide (PbaOJ) was added to [31
1+, tPb6. ．． 5r1Ca, Cu1. , Oy.
まず、酸化ビスマス（Ｄｉミオ０）Ｏ炭酸ストロンチウ
ム（ＳｒＣＯｌ）Ｏ炭酸カルシウム（ＣａＣＯｌ）Ｏ酸
化（Ｃｕｂ）の原料粉末を十分に混合した後、この粉末
を空気中で８５０℃で焼成する。 さらに、この仮焼粉
に四化酸三鉛（Ｐｂ１ｏ４）の粉末を添加し、？ｇ、合
した後。First, raw material powders of bismuth oxide (DiMio0)O strontium carbonate (SrCOI)Ocalcium carbonate (CaCOI)O oxide (Cub) are thoroughly mixed, and then this powder is fired at 850°C in air. Furthermore, trilead tetroxide (Pb1o4) powder is added to this calcined powder. g. After combining.
酸素雰囲気中で８５０℃で熱処理する。 この粉末をア
セト、ンと共に粉砕し、微細粉を得る。この粉末を銀製
のシースに充填し、冷間圧延法により引伸し、再熱処理
して超電導線材を得る。Heat treatment is performed at 850° C. in an oxygen atmosphere. This powder is ground with acetone to obtain a fine powder. This powder is filled into a silver sheath, stretched by cold rolling, and reheated to obtain a superconducting wire.
この製造方法により得られた超電導線材の複数のロフト
の電流密度特性を第２図に示す。第２図は第１図と同様
に縦軸には分布度数を、横軸には電流密度のバラツキを
とったもので、曲線Δ、Ｂはそれぞれ前記第１の実施例
の曲線Ａ、Ｈに対応し、曲線Ｃは第２の実施例の仮焼粉
に四酸化三鉛（Ｐｂ３０．）を添加した場合である。FIG. 2 shows the current density characteristics of multiple lofts of the superconducting wire obtained by this manufacturing method. In FIG. 2, like FIG. 1, the vertical axis shows the distribution frequency, and the horizontal axis shows the variation in current density, and the curves Δ and B correspond to the curves A and H of the first embodiment, respectively. Correspondingly, curve C is the case where trilead tetroxide (Pb30.) is added to the calcined powder of the second example.
この結果かられかるように、第２の実施例における超電
導体は第１の実施例に比較してロット毎の電流密度のバ
ラツキの小ささあまり変わらないが、更に電流密度が改
善させている。このように。As can be seen from this result, the superconductor in the second example does not have much difference in the variation in current density from lot to lot compared to the first example, but the current density is further improved. in this way.
更に改善された電流密度を有する超電導体が得られるの
は概略以下のように考えられる。四酸化三鉛（Ｐｂ３Ｏ
、 ）添加効果のメカニズムは第１の実施例の作用と同
じであるが、仮焼粉を再び熱処理した場合、酸素雰囲気
中で熱処理してＭ素置圧の微妙な影響で一部を生じる酸
素含有率の変化を四酸化三鉛（Ｐｂ３０．）が放出する
酸素で安定化するためである。The reason why a superconductor having a further improved current density can be obtained is generally considered to be as follows. Trilead tetroxide (Pb3O
, ) The mechanism of the addition effect is the same as the effect of the first example, but when the calcined powder is heat-treated again, some oxygen is generated due to the subtle influence of the M-placement pressure when the calcined powder is heat-treated in an oxygen atmosphere. This is to stabilize changes in the content rate with oxygen released by trilead tetroxide (Pb30.).
前記した実施例では、ビスマス、ストロンチウム、カル
シウム、銅の原料に酸化物及び炭酸化物を用いたが、焼
結して酸化物になるものであれば何でもよく１例えば水
酸化物等であっても同じ効果が得られることはいうまで
もない、また、ビスマス、鉛、ストロンチウム、カルシ
ウム、銅の組成も上記実施例に限定されるものではない
。In the above embodiments, oxides and carbonates were used as raw materials for bismuth, strontium, calcium, and copper, but any material may be used as long as it becomes an oxide when sintered. It goes without saying that the same effect can be obtained, and the compositions of bismuth, lead, strontium, calcium, and copper are not limited to those in the above embodiments.
〔発明の効果〕
以上述べたように１本発明によれば、ビスマス（Ｂｉ）
Ｏ鉛（Ｐｂ） 、ストロンチウム（Ｓｒ） 、カルシウ
ム（Ｃａ）Ｏ銅（Ｃｕ）Ｏ酸素（Ｏ）から成る超電導体
において少なくも鉛の出発原料に四酸化三鉛（Ｐｂ、
Ｏ，）を用いることにより、電流密度のバラツキの少な
い安定した特性を有する超電導体を提供することができ
る。[Effects of the Invention] As described above, according to the present invention, bismuth (Bi)
In a superconductor consisting of lead (Pb), strontium (Sr), calcium (Ca), copper (Cu), oxygen (O), trilead tetroxide (Pb,
By using O, ), it is possible to provide a superconductor having stable characteristics with little variation in current density.
また１本発明によれば、ビスマス（Ｂｉ） 、鉛（Ｐｂ
）。Furthermore, according to the present invention, bismuth (Bi), lead (Pb)
).
ストロンチウム（Ｓｒ） 、カルシウム（Ｃａ）Ｏ銅（
Ｃｕ）。Strontium (Sr), Calcium (Ca)O Copper (
Cu).
酸素（Ｏ）から成る超電導体の製造方法において、ビス
マス（口ｉＬカルシウム（Ｃａ）Ｏ銅（Ｃｕ）及び四酸
化三鉛（Ｐｂ、０４）の各化合物を予め混合、仮焼した
後、その仮焼粉を焼成するか、あるいはビスマス（［ｌ
ｉ） 、ストロンチウム（Ｓｒ）Ｏカルシウム（Ｃａ）
、銅（Ｃｕ）の各化合物番予め混合、仮焼し、その仮
焼粉に四酸化三鉛（Ｐｂ、３Ｏ４）を添加した後焼成す
るようにしたので電流密度のバラツキの小さい安定した
特性を有する超電導体の製造方法を得ることができる。In a method for manufacturing a superconductor consisting of oxygen (O), compounds of bismuth (calcium (Ca), copper (Cu), and trilead tetroxide (Pb, 04) are mixed in advance and calcined, and then the Either baking powder or baking bismuth ([l
i) , Strontium (Sr) O Calcium (Ca)
, each compound number of copper (Cu) was premixed and calcined, and trilead tetroxide (Pb, 3O4) was added to the calcined powder before firing, resulting in stable characteristics with little variation in current density. A method for manufacturing a superconductor can be obtained.
第１図は本発明の一実施例による超電導体の効果を示す
電流密度特性図で、第２図は本発明の他の実施例による
超電導体の効果を示す電流密度特性図である。
Ａ・・・従来の特性曲線
Ｂ、Ｃ・・・本発明による特性曲線
代理人 弁理士 則 近 憲 佑
同 第子丸 健FIG. 1 is a current density characteristic diagram showing the effect of a superconductor according to one embodiment of the present invention, and FIG. 2 is a current density characteristic diagram showing the effect of a superconductor according to another embodiment of the present invention. A...Conventional characteristic curve B, C...Characteristic curve according to the present invention Patent attorney Yudo Nori Chika Ken Daishimaru
Claims (3)
（Ｓｒ）、カルシウム（Ｃａ）、銅（Ｃｕ）、酸素（Ｏ
）から成る超電導体において、少くとも鉛の出発原料に
四酸化三鉛（Ｐｂ＿３Ｏ＿４）を用いることを特徴とす
る超電導体。(1) Bismuth (Bi), lead (Pb), strontium (Sr), calcium (Ca), copper (Cu), oxygen (O
), characterized in that trilead tetroxide (Pb_3O_4) is used at least as a starting material for lead.
（Ｓｒ）、カルシウム（Ｃａ）、銅（Ｃｕ）、酸素（Ｏ
）から成る超電導体の製造方法において、ビスマス（Ｂ
ｉ）Ｏストロンチウム（Ｓｒ）、カルシウム（Ｃａ）、
銅（Ｃｕ）及び四酸化二鉛（Ｐｂ＿３Ｏ＿４）の各化合
物を予め混合、仮焼した後、その仮焼粉を焼成すること
を特徴とする超電導体の製造方法。(2) Bismuth (Bi), lead (Pb), strontium (Sr), calcium (Ca), copper (Cu), oxygen (O
) in a method for manufacturing a superconductor consisting of bismuth (B
i) O strontium (Sr), calcium (Ca),
A method for producing a superconductor, which comprises mixing and calcining compounds of copper (Cu) and dilead tetroxide (Pb_3O_4) in advance, and then firing the calcined powder.
（Ｓｒ）、カルシウム（Ｃａ）、銅（Ｃｕ）、酸素（Ｏ
）から成る超電導体の製造方法において、ビスマス（Ｂ
ｉ）、ストロンチウム（Ｓｒ）、カルシウム（Ｃａ）、
銅（Ｃｕ）の各化合物を予め混合、仮焼し、その仮焼粉
に四酸化三鉛（Ｐｂ＿３Ｏ＿４）を添加した後焼成する
ことを特徴とする超電導体の製造方法。(3) Bismuth (Bi), lead (Pb), strontium (Sr), calcium (Ca), copper (Cu), oxygen (O
) in a method for manufacturing a superconductor consisting of bismuth (B
i), Strontium (Sr), Calcium (Ca),
A method for manufacturing a superconductor, which comprises mixing and calcining copper (Cu) compounds in advance, adding trilead tetroxide (Pb_3O_4) to the calcined powder, and then firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63141621A JPH01313326A (en) | 1988-06-10 | 1988-06-10 | Superconductor and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63141621A JPH01313326A (en) | 1988-06-10 | 1988-06-10 | Superconductor and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01313326A true JPH01313326A (en) | 1989-12-18 |
Family
ID=15296301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63141621A Pending JPH01313326A (en) | 1988-06-10 | 1988-06-10 | Superconductor and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01313326A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226879A (en) * | 1988-07-13 | 1990-01-29 | Toray Ind Inc | Superconducting material |
-
1988
- 1988-06-10 JP JP63141621A patent/JPH01313326A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226879A (en) * | 1988-07-13 | 1990-01-29 | Toray Ind Inc | Superconducting material |
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