JPH01279507A - Manufacture of ceramic superconductor - Google Patents
Manufacture of ceramic superconductorInfo
- Publication number
- JPH01279507A JPH01279507A JP63108217A JP10821788A JPH01279507A JP H01279507 A JPH01279507 A JP H01279507A JP 63108217 A JP63108217 A JP 63108217A JP 10821788 A JP10821788 A JP 10821788A JP H01279507 A JPH01279507 A JP H01279507A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- ceramic
- powder
- alloy
- produce
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002887 superconductor Substances 0.000 title claims description 15
- 239000000843 powder Substances 0.000 claims abstract description 17
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 230000001590 oxidative effect Effects 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 15
- 238000010304 firing Methods 0.000 claims description 9
- 239000011812 mixed powder Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 abstract description 12
- 239000001301 oxygen Substances 0.000 abstract description 12
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 239000000470 constituent Substances 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000011946 reduction process Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 4
- 239000000203 mixture Substances 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 210000003298 dental enamel Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000000886 hydrostatic extrusion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910002482 Cu–Ni Inorganic materials 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
- 238000005280 amorphization Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910000657 niobium-tin Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000004804 winding 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
Landscapes
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は超電導体の製造方法に係り、特にセラミックス
系超電導体の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a superconductor, and particularly to a method for manufacturing a ceramic superconductor.
〔従来の技術］
近年、特に−昨年の秋以降、セラミックス超電導体の開
発が世界中で急ピッチで進められている。[Prior Art] In recent years, especially since last fall, the development of ceramic superconductors has been progressing at a rapid pace all over the world.
この超電導体は、従来の最高の臨界温度を示すＮｂ３Ｇ
ｅの２３Ｋを大巾に越えるもので、Ｂａ−Ｌａ−Ｃｕ−
０系セラミツクス（臨界温度３５Ｋ ） 、Ｌａ−８ｒ
−Ｃｕ−０系セラミツクス（超電導開始温度３７に以上
）、Ｌａ−Ｃａ−Ｃｕ−０系セラミツクス、Ｙ−Ｂａ−
Ｃｕ−０系セラミツクス（ゼロ抵抗温度９３Ｋ）等のほ
か、２３３にあるいは室温の臨界温度を示すセラミック
スも報告されている。This superconductor is Nb3G, which has the highest conventional critical temperature.
It greatly exceeds 23K of e, and is Ba-La-Cu-
0 series ceramics (critical temperature 35K), La-8r
-Cu-0 ceramics (superconductivity starting temperature 37 or higher), La-Ca-Cu-0 ceramics, Y-Ba-
In addition to Cu-0 ceramics (zero resistance temperature of 93 K), ceramics that exhibit a critical temperature of 233 or room temperature have also been reported.
このようにセラミックス超電導材料は臨界温度が液体窒
素温度以上や室温で用いることができる可能性があり、
この場合、高価な液体ヘリウムを使用しなくて済むため
、経済的に極めて有利となるほか、超電導発電機等に使
用されると構造がシンプルで熱機関の効率も向上する等
の利点を有する。In this way, it is possible that ceramic superconducting materials can be used at critical temperatures higher than the liquid nitrogen temperature or at room temperature.
In this case, there is no need to use expensive liquid helium, which is extremely advantageous economically, and when used in a superconducting generator or the like, the structure is simple and the efficiency of the heat engine is improved.
しかしながら、セラミックスは硬くて、かつ脆いため、
現在実用化されているＮｂ−Ｔｌ系やＮｂ３ Ｓｎ系超
電導線のように曲げたり、あるいはコイル巻きすること
ができず、この点を克服することが実用化への第１歩と
なる。However, since ceramics are hard and brittle,
Unlike the Nb-Tl and Nb3Sn superconducting wires currently in practical use, it cannot be bent or coiled, and overcoming this point is the first step toward practical use.
現在線材の製造方法として、
■アモルファスのテープあるいは線材を酸素雰囲気下で
加熱処理する方法、
■合金管（たとえばＣｕ−Ｎｉ合金）の内部に原料の粉
末を充填し、両端を引張って線材やテープ状に成形する
方法、
■銅系合金管内にセラミックスを充填し、熱処理および
圧延加工等を施して線材やテープ状に成形する方法、等
が提案されている。Currently, there are two ways to manufacture wire rods: 1. Heat-treating amorphous tape or wire in an oxygen atmosphere; 2. Filling an alloy tube (for example, Cu-Ni alloy) with raw material powder and pulling both ends to produce wire or tape. 2) A method of filling a copper alloy tube with ceramics, subjecting it to heat treatment, rolling, etc., and forming it into a wire or tape shape, etc. have been proposed.
しかしながら、上記■の方法においては、極めて急速な
冷却を必要とする上、極めて細い線材や薄膜のテープし
か得られず、実用線材を得る方法としては、難点を有し
ており、上記■の方法では長尺の線材を連続的に製造す
ることが困難であり、上記■の方法では加工工程が複雑
となる上、超電導体の連続性に難点がある。この場合、
セラミックス超電導体生成の熱処理は、ｔｉｉ電導特性
向上の観点から成形後、すなわち最終線径近傍で施すこ
とが望ましいが、銅系合金管で被覆されているため成形
後に内部に酸素を供給することが極めて困難であり、実
際上不可能である。However, the above method (■) requires extremely rapid cooling and can only yield extremely thin wire rods or thin film tapes, so it has disadvantages as a method for obtaining practical wire rods. In this method, it is difficult to continuously manufacture long wire rods, and in the above method (2), the processing steps are complicated and there are problems in the continuity of the superconductor. in this case,
Heat treatment for producing ceramic superconductors is preferably performed after forming, that is, near the final wire diameter, from the perspective of improving electrical conductivity, but since the wire is covered with a copper alloy tube, it is difficult to supply oxygen inside the wire after forming. This is extremely difficult and practically impossible.
［発明が解決しようとする課８］
本発明は、上記の難点を解決するためになされたもので
、アモルファス化のための急速冷却を必要とせず、長尺
の線条の加工を容易に行うことができる上、超電導物質
の焼結層形成の熱処理を長尺の線材の状態で施すことが
でき、かつ高い臨界電流密度の実用線材を製造すること
が可能なセラミックス系超電導体の製造方法を提供する
ことをその目的とする。[Issue 8 to be solved by the invention] The present invention has been made to solve the above-mentioned difficulties, and facilitates the processing of long filaments without requiring rapid cooling for amorphization. We have developed a method for manufacturing ceramic superconductors that not only allows the superconducting material to be heat-treated to form a sintered layer in the form of a long wire, but also allows the production of practical wires with high critical current density. Its purpose is to provide.
［課題を解決するための手段］
本発明のセラミックス系超電導体の製造方法は、（イ）
セラミックス系超電導物質および／または酸化性雰囲気
中で加熱することによりセラミックス系超電導物質を生
成する構成物質からなる粉末と、セラミックス系超電導
物質の焼成温度で酸化物を生成しない金属あるいは合金
よりなる粉末を混合する工程と、
（ロ）この混合粉末をセラミックス系超電導物質の焼成
温度で酸化物を生成しない金属あるいは合金管中に収容
する工程と、
（ハ）断面減少加工を施して線状あるいはテープ状に成
形する工′程と、
（ニ）酸化性雰囲気中で加熱処理を施す工程とからなる
ことを特徴とする。[Means for Solving the Problems] The method for manufacturing a ceramic superconductor of the present invention includes (a)
A powder made of a ceramic superconducting material and/or a component that produces a ceramic superconducting material by heating in an oxidizing atmosphere, and a powder made of a metal or alloy that does not produce oxides at the firing temperature of the ceramic superconducting material. (b) A step of housing this mixed powder in a metal or alloy tube that does not produce oxides at the firing temperature of the ceramic superconducting material; (c) A process of reducing the cross section to form a wire or tape shape. (iv) heat treatment in an oxidizing atmosphere.
本発明において用いられるセラミックス系の超電導物質
としては、たとえばＹ−Ｂａ−Ｃｕ−０系のＹＢａ２Ｃ
ｕｘ ＯＸ （ｘ＜ １４ ：ペロブスカイト）やこれ
にＦ等を添加したものが、一方、酸化性雰囲気中での熱
処理によりセラミックス超電導物質を生成する構成物質
しては、たとえばＹ−Ｂａ−Ｃｕ系合金（Ｙ：Ｂａ：Ｃ
ｕ −１：２：３ 、原子数比）やＹ １Ｂａｓ Ｃｕ
あるいはこれらの酸化物等の混合粉末が用いられる。Ceramic superconducting materials used in the present invention include, for example, Y-Ba-Cu-0 based YBa2C
ux OX (x < 14: perovskite) and those to which F etc. are added, while constituent materials that produce ceramic superconducting materials by heat treatment in an oxidizing atmosphere include, for example, Y-Ba-Cu alloys. (Y:Ba:C
u −1:2:3, atomic ratio) or Y 1Bas Cu
Alternatively, a mixed powder of these oxides or the like may be used.
もちろん、他のセラミックス系の超電導物質、たとえば
Ｌａ−３ｒ−Ｃｕ−０系のセラミックスやそれを生成す
る構成物質を用いることもできる。Of course, other ceramic-based superconducting materials, such as La-3r-Cu-0-based ceramics and constituent materials that produce them, can also be used.
またセラミックス系超電導物質の焼成温度で酸化物を生
成しない金属、合金としてはＡｇｓ Ｐｔ５Ａｕあるい
はこれらの合金が用いられ、この粉末は加工性を改善す
るとともに超電導体の連続性を維持する効果を有し、か
つ安定化材としても機能する。In addition, AgsPt5Au or an alloy thereof is used as a metal or alloy that does not generate oxides at the firing temperature of ceramic superconducting materials, and this powder has the effect of improving workability and maintaining the continuity of the superconductor. , and also functions as a stabilizing agent.
さらにこのような材料からなる管体は加工性を収容し、
高加工度の加工を可能にするとともに安定化材としての
役割を果す上、酸化性雰囲気中での加熱によりセラミッ
クス超電導物質を適度な速度で微細に生成させる働きを
有する。Furthermore, tubes made of such materials accommodate workability,
In addition to enabling high-speed processing and acting as a stabilizing material, it also has the function of generating fine ceramic superconducting materials at an appropriate rate by heating in an oxidizing atmosphere.
上記の焼成温度で酸化物を生成しない金属等の粉末は全
粉末量に対して１〜８０ ｖｏ１％の間で選択すること
ができる。Powders such as metals that do not produce oxides at the above firing temperature can be selected in an amount of 1 to 80 vol% based on the total amount of powder.
混合粉末を金属管内へ収容するに際しては、予め室温に
おいて静水圧加圧処理を施すことが望ましい。これによ
りその後の断面減少加工が容易となる。この断面減少加
工としては静水圧押出加工、スウェージング加工、圧延
および伸線加工が適宜選択される。When housing the mixed powder in a metal tube, it is desirable to perform hydrostatic pressure treatment at room temperature in advance. This facilitates the subsequent cross-section reduction process. As this cross-section reducing process, hydrostatic extrusion, swaging, rolling, and wire drawing are appropriately selected.
セラミックス超電導物質の焼成は、酸素気流中あるいは
酸素加圧下で酸化調整しながら７００〜１０００℃に加
熱して、特性の改善が図られる。超電導体の外側には通
常絶縁被膜が施される。絶縁被膜としては何機あるいは
無機材料が用いられ、前者の有機絶縁被膜としてはＵｖ
硬化ウレタン樹脂やＰｖＦエナメルを、一方、後者の無
機絶縁被膜としてはアルミナやポリボロシロキサン樹脂
等を挙げることができる。Ceramic superconducting materials are fired by heating to 700 to 1000° C. in an oxygen stream or under oxygen pressure while controlling oxidation to improve their properties. An insulating coating is usually applied to the outside of the superconductor. Some organic or inorganic materials are used as the insulating film, and the former organic insulating film is UV
Examples of the inorganic insulating coating include cured urethane resin and PvF enamel, while examples of the latter inorganic insulating coating include alumina and polyborosiloxane resin.
［実施例］
実施例
外径５μＩφ以下のＹＢａ２ Ｃｕｌ ０７〜８セラ
ミツクスの粉末７０ｖｏ１％と外径１００μ■φ以下の
Ａｇ粉末３０ｖｏ１％を均一に混合した後、１０．００
０ｋｇ／ｃｊｊ圧力で静水圧加圧処理を１０分間施し、
外径４０■φ、長さ３００ａｍの形状に成型した。[Example] After uniformly mixing 70 vol % of YBa2 Cul 07-8 ceramic powder with an exception diameter of 5 μIφ or less and 30 vol 1% of Ag powder with an outer diameter of 100 μιφ or less, 10.00
Hydrostatic pressure treatment was applied for 10 minutes at 0 kg/cjj pressure,
It was molded into a shape with an outer diameter of 40 mm and a length of 300 am.
この成型体を外径５０■φ、内径４１＋ａ＋φのＡｇ管
中に収容して、この両端をエレクトロンビームで密封し
て得たビレットに２回の静水圧押出加工を施して外径１
８＋ｍφのロッドを製造した後、スウエージング加工、
圧延加工および伸線加工を順次施して外径１．ｈｉφの
線材を製造した。This molded body was housed in an Ag tube with an outer diameter of 50 mm and an inner diameter of 41 mm, and both ends of the molded body were sealed with an electron beam.The resulting billet was subjected to hydrostatic extrusion twice.
After manufacturing a rod of 8+mφ, swaging process,
Rolling and wire drawing are performed sequentially to reduce the outer diameter to 1. A hiφ wire rod was manufactured.
このようにして得られた線材に酸素雰囲気中で９００℃
×７２時間の熱処理を施してセラミックス超電導線を裂
地した。この超電導線の臨界電流密度（」Ｃ）は７７Ｋ
、 ＯＴで３０ＯＡ／ｃｄであった。The wire rod thus obtained was heated to 900°C in an oxygen atmosphere.
The ceramic superconducting wire was subjected to heat treatment for 72 hours to tear the ceramic superconducting wire. The critical current density ('C) of this superconducting wire is 77K
, OT was 30OA/cd.
比較例
上記の実施例のＡｇ粉末を用いずに
ＹＢａ２ Ｃｕ３０７ Ｂセラミックス粉末のみとし、
他は同様の条件で線材を製造した場合の伸線加工限界は
外囲２ 、０ｍ＋ｇφであった。この線材に実施例と同
一の条件で熱処理を施した超電導線の臨界電流密度（Ｊ
ｃ）は７７Ｋ 、 ＯＴで５Ａ／ ｃｉ／であった。Comparative Example Using only YBa2 Cu307 B ceramic powder without using the Ag powder of the above example,
When the wire rod was manufactured under the same conditions, the wire drawing limit was 2 mm, 0 m + gφ. The critical current density (J
c) was 77K, 5A/ci/ in OT.
上記の実施例で得られたセラミックス超電導線は銀が安
定化材として作用する上、高い臨界電流密度を有し、か
つ細線化が可能なため容易に編組構造や撚線構造とする
ことができ、大サイズ導体や交流用導体を製造すること
ができる。The ceramic superconducting wire obtained in the above example has silver acting as a stabilizing material, has a high critical current density, and can be made into a thin wire, so it can be easily made into a braided or stranded structure. , large-sized conductors and AC conductors can be manufactured.
以上述べたように上記の実施例は銀の酸素に対する特殊
な働きを利用したもので、銀と酸素が高温
２Ａｇ０２二 ２ＡｇＯ
低温
の関係を有すること、銀を通して酸素が拡散すること、
銀がＡｇｏの形で酸素を運び容易に解離して合金を酸化
することを利用したもので、同様の働きを有するものと
して銀合金や金、白金およびこれらの合金を用いること
ができる。As mentioned above, the above embodiment utilizes the special action of silver on oxygen; silver and oxygen have a high-temperature relationship with low-temperature, and oxygen diffuses through silver.
This method utilizes the fact that silver carries oxygen in the form of Ago and easily dissociates to oxidize the alloy. Silver alloys, gold, platinum, and alloys thereof can be used as materials having similar functions.
［発明の効果］
以上述べたように本発明のセラミックス系超電導体の製
造方法によれば、長尺の電気的に安定した線材を容易に
製造することができるとともに、高い電流密度の超電導
線を得ることができる。[Effects of the Invention] As described above, according to the method for manufacturing a ceramic superconductor of the present invention, a long electrically stable wire can be easily manufactured, and a superconducting wire with a high current density can be manufactured. Obtainable.
すなわち、混合粉末中に焼成温度で酸化物を生成しない
金属等の粉末を有し、かつ外側が焼成温度で酸化物を生
成しない金属等で被覆されているため、加工性に優れる
上、最終形状で熱処理を施すことができ、この熱処理時
の酸素の供給を適当に制限してセラミックス生成時の粉
末化や燃焼を防止することができ、かつセラミックス焼
成時の体積膨張を安定化材のクリープで抑えることによ
り、加圧下でセラミックスを生成することができる。し
たがって微細なペロブスカイト結晶を生成することがで
き、高電流密度の超電導線を製造することができる。In other words, the mixed powder contains powder of a metal that does not produce oxides at the firing temperature, and the outside is coated with a metal that does not produce oxides at the firing temperature. The oxygen supply during this heat treatment can be appropriately restricted to prevent powdering and combustion during ceramic formation, and the volume expansion during ceramic firing can be suppressed by creep of the stabilizing material. By holding down, ceramics can be produced under pressure. Therefore, fine perovskite crystals can be produced, and superconducting wires with high current density can be manufactured.
本発明によって製造された超電導体は可撓性に優れるた
め、これらの複数本を用いて集合線、撚線あるいは編組
線を容易に形成することができ、このようにして得られ
た線材をコイル巻きした後、エナメルフェスを含浸して
超電導マグネットを製作することができる。Since the superconductor manufactured by the present invention has excellent flexibility, a plurality of these can be used to easily form an assembled wire, a stranded wire, or a braided wire, and the wire obtained in this way can be formed into a coil. After winding, the enamel face can be impregnated to create a superconducting magnet.
Claims (1)
酸化性雰囲気中で加熱することによりセラミックス系超
電導物質を生成する構成物質からなる粉末と、セラミッ
クス系超電導物質の焼成温度で酸化物を生成しない金属
あるいは合金よりなる粉末を混合する工程と、 （ロ）この混合粉末をセラミックス系超電導物質の焼成
温度で酸化物を生成しない金属あるいは合金管中に収容
する工程と、 （ハ）断面減少加工を施して線状あるいはテープ状に成
形する工程と、 （ニ）酸化性雰囲気中で加熱処理を施す工程とからなる
ことを特徴とするセラミックス系超電導体の製造方法。(1) (a) Powder consisting of a ceramic superconducting material and/or a component that produces a ceramic superconducting material when heated in an oxidizing atmosphere, and a metal that does not produce oxides at the firing temperature of the ceramic superconducting material. Alternatively, a step of mixing a powder made of an alloy, (b) a step of housing this mixed powder in a metal or alloy tube that does not produce oxides at the firing temperature of the ceramic superconducting material, and (c) a process of reducing the cross section. 1. A method for producing a ceramic superconductor, comprising the steps of: forming a ceramic superconductor into a wire or tape shape; and (d) heat-treating in an oxidizing atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63108217A JPH01279507A (en) | 1988-04-30 | 1988-04-30 | Manufacture of ceramic superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63108217A JPH01279507A (en) | 1988-04-30 | 1988-04-30 | Manufacture of ceramic superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01279507A true JPH01279507A (en) | 1989-11-09 |
Family
ID=14479001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63108217A Pending JPH01279507A (en) | 1988-04-30 | 1988-04-30 | Manufacture of ceramic superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01279507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02256108A (en) * | 1988-10-17 | 1990-10-16 | Fmc Corp | Surperconductive metal matrix complex and its manufacture |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63285155A (en) * | 1987-05-15 | 1988-11-22 | Hitachi Ltd | Oxide type superconductive material and production thereof |
-
1988
- 1988-04-30 JP JP63108217A patent/JPH01279507A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63285155A (en) * | 1987-05-15 | 1988-11-22 | Hitachi Ltd | Oxide type superconductive material and production thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02256108A (en) * | 1988-10-17 | 1990-10-16 | Fmc Corp | Surperconductive metal matrix complex and its manufacture |
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