JPH0360456A - Production of superconductor - Google Patents
Production of superconductorInfo
- Publication number
- JPH0360456A JPH0360456A JP1192398A JP19239889A JPH0360456A JP H0360456 A JPH0360456 A JP H0360456A JP 1192398 A JP1192398 A JP 1192398A JP 19239889 A JP19239889 A JP 19239889A JP H0360456 A JPH0360456 A JP H0360456A
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- pipe
- stainless steel
- oxidation
- metal
- 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 61
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 23
- 239000010935 stainless steel Substances 0.000 claims abstract description 23
- 238000005245 sintering Methods 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 18
- 230000003647 oxidation Effects 0.000 claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 238000002425 crystallisation Methods 0.000 claims 1
- 230000008025 crystallization Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 14
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052709 silver Inorganic materials 0.000 abstract description 8
- 239000004332 silver Substances 0.000 abstract description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052737 gold Inorganic materials 0.000 abstract description 2
- 239000010931 gold Substances 0.000 abstract description 2
- 229910052697 platinum Inorganic materials 0.000 abstract description 2
- 238000011049 filling Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101150029237 Il11 gene Proteins 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment 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
- 239000004615 ingredient Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000000007 visual effect Effects 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)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、焼結時に未反応成分の分解ガスの膨脹で金属
パイプが膨大化することを防止した超電導体の製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a superconductor that prevents a metal pipe from becoming bulky due to expansion of decomposed gas of unreacted components during sintering.
従来の技術及び課題
第１図に例示した如く、金属パイプ１に酸化物超電導体
の粉末２を充填し、この充填体を所望の形状に塑性加工
したのち焼結処理して超電導体を製造する方法が提案さ
れている。BACKGROUND ART AND PROBLEMS As illustrated in FIG. 1, a metal pipe 1 is filled with oxide superconductor powder 2, and the filled body is plastically worked into a desired shape and then sintered to produce a superconductor. A method is proposed.
従来、その金属パイプとしては銀パイプが用いられて来
た。しかしながら、第４図に示した如く焼結時に金属パ
イプ１が膨大し、得られる超電導体が凹凸化する問題点
があった。Conventionally, silver pipes have been used as the metal pipes. However, as shown in FIG. 4, there is a problem in that the metal pipe 1 expands during sintering and the obtained superconductor becomes uneven.
課題を解決するための手段
本発明者は、前記問題点を克服すべく鋭意研究を重ねて
かかる金属パイプの膨大化は、焼結時に酸化物超電導体
の粉末中に残存する原料としての未反応成分が分解し、
その分解ガスが焼結時の温度で膨脹して金属パイプを膨
らませるためであることを究明し、この知見に基づいて
更に研究を重ねた結果、耐酸化性処理したステンレスパ
イプを用いることにより超電導特性を低下させることな
く上記課題を克服できることを見出し、本発明をなすに
至った。Means for Solving the Problems The inventor of the present invention has conducted extensive research to overcome the above-mentioned problems. The ingredients decompose,
It was determined that the decomposition gas expands at the temperature during sintering, causing the metal pipe to swell. Based on this knowledge, further research revealed that superconductivity can be achieved by using stainless steel pipes treated to resist oxidation. It has been discovered that the above problems can be overcome without deteriorating the characteristics, and the present invention has been completed.
すなわち本発明は、金属パイプに充填した酸化物超電導
体の粉末を焼結処理して超電導体を製造するにあたり、
金属パイプとして内外面を耐酸化性金属で被覆処理した
ステンレスパイプを用いることを特徴とする超電導体の
製造方法、及び酸化物超電導体の粉末を充填した金属バ
イブの複数本を、内外面を耐酸化性金属で被覆処理した
ステンレスパイプ内に装填して加熱処理し、金属パイプ
内の酸化物超電導体の粉末を焼結処理することを特徴と
する超電導体の製造方法を提供するものである。That is, the present invention provides a method for producing a superconductor by sintering oxide superconductor powder filled in a metal pipe.
A method for manufacturing a superconductor characterized by using a stainless steel pipe whose inner and outer surfaces are coated with an oxidation-resistant metal, and a plurality of metal vibrators filled with oxide superconductor powder, whose inner and outer surfaces are coated with an acid-resistant metal. The present invention provides a method for manufacturing a superconductor, characterized in that the oxide superconductor powder is loaded into a stainless steel pipe coated with a oxidizing metal, heat-treated, and the oxide superconductor powder in the metal pipe is sintered.
作用
内外面を耐酸化性金属で被覆処理したステンレスパイプ
を用いることにより、焼結時に未反応成分の分解ガスが
生じた場合にも、金属バイブの凹凸化、ないし膨大化を
防止することができると共に、焼結時におけるステンレ
スパイプの酸化を防止できて超電導特性の低下を回避す
ることができる。By using a stainless steel pipe whose inner and outer surfaces are coated with oxidation-resistant metal, the metal vibrator can be prevented from becoming uneven or bulky even when decomposed gas from unreacted components is generated during sintering. At the same time, oxidation of the stainless steel pipe during sintering can be prevented, and deterioration of superconducting properties can be avoided.
発明の構成要素の例示
本発明において用いる酸化物超電導体については特に限
定はない、ＹＢａ２Ｃｕ３０ａやＹｉ、−ｂＢａｂＣｕ
Ｏｃの如きＹ系酸化物超電導体、Ｂａｔ−ｄＫｃｉＢ
ｉ Ｏ３の如きＢａ系酸化物超電導体、Ｎｄ２−ｅ
Ｃｅ。Examples of Constituent Elements of the Invention The oxide superconductor used in the present invention is not particularly limited, and may include YBa2Cu30a, Yi, -bBabCu
Y-based oxide superconductor such as Oc, Bat-dKciB
i Ba-based oxide superconductor such as O3, Nd2-e
Ce.
Ｃｕ０４−ｆの如きＮｄ系酸化物超電導体、Ｂｉ２−ｚ
Ｐｂｒ Ｓｒ２ Ｃａ２Ｃｕ３０ゎやＢｉ２５ｒ２Ｃａ
ｔ−ｉＹＩＣＩＪ２０８−１の如きＢｉ系酸化物超電導
体、その化Ｔａ系酸化物超電導体、Ｌａ系酸化物超電導
体、ＴＩ系酸化物超電導体、ｐｂ系酸化物超電導体など
、また前記のＹ等の成分を他の希土類元素で置換したも
の、ないしＢａ等の成分を他のアルカリ土類金属で置換
したもの、あるいは０成分をＦなどで置換したものなど
、公知物のいずれも用いることができる。就中、Ｂｉ系
酸化物超電導体やＴａ系酸化物超電導体の如く、焼結処
理時おける酸素の出入が少ない酸化物超電導体が好まし
く用いられる。Nd-based oxide superconductors such as Cu04-f, Bi2-z
Pbr Sr2 Ca2Cu30ゎ and Bi25r2Ca
Bi-based oxide superconductors such as t-iYICIJ208-1, Ta-based oxide superconductors, La-based oxide superconductors, TI-based oxide superconductors, pb-based oxide superconductors, etc., as well as the above-mentioned Y, etc. Any of the known products can be used, such as those in which the component is replaced with other rare earth elements, those in which components such as Ba are replaced with other alkaline earth metals, or those in which the zero component is replaced with F, etc. . Among these, oxide superconductors such as Bi-based oxide superconductors and Ta-based oxide superconductors, which allow little oxygen to enter and exit during the sintering process, are preferably used.
なお酸化物超電導体は例えば、所定の組成となる配合割
合で原料を共沈法やゾルゲル法等の湿式混合法、ないし
その他の適宜な混合法で混合し、その混合物を仮焼処理
ないし焼結処理して超電導体とすることにより得ること
ができる。Note that oxide superconductors are produced by, for example, mixing raw materials at a predetermined composition ratio using a wet mixing method such as a coprecipitation method or a sol-gel method, or any other suitable mixing method, and then calcining or sintering the mixture. It can be obtained by processing to make a superconductor.
用いる酸化物超電導体の粉末は例えば、前記の焼結処理
体等を粉砕することにより得ることができる。ステンレ
スバイブ、ないし金属バイブへの緻密充填性、就中７０
〜９０％の高密度充填性（空隙率３０〜ｌＯ％）などの
点より、その粒径は小さいほど好ましい。一般には１０
０μ圃以下、就中５０印以下の粒径が好ましい。The powder of the oxide superconductor used can be obtained, for example, by pulverizing the sintered body or the like described above. Dense filling ability for stainless steel vibes or metal vibes, especially 70
From the point of view of high density packing of ~90% (porosity 30~10%), the smaller the particle size, the more preferable. Generally 10
A grain size of 0 μm or less, especially 50 marks or less is preferred.
本発明において用いるステンレスパイプは、第２図や第
３図に例示した如く、外周面及び内周面を銀、金、白金
の如き耐酸化性金属で被覆処理したものである。これに
より、焼結処理時にステンレスバイブが酸化することを
防止でき、超電導特性の低下を防止することができる。As illustrated in FIGS. 2 and 3, the stainless steel pipe used in the present invention has its outer and inner surfaces coated with an oxidation-resistant metal such as silver, gold, or platinum. Thereby, the stainless steel vibrator can be prevented from being oxidized during the sintering process, and the deterioration of superconducting properties can be prevented.
図中、１１がステンレス層、１２が耐酸化性金属層であ
る。In the figure, 11 is a stainless steel layer, and 12 is an oxidation-resistant metal layer.
本発明において耐酸化性金属で被覆処理したステンレス
パイプは、酸化物超電導体の粉末の充填に用いる（第２
図）。また、酸化物超電導体の粉末を充填した金属バイ
ブ１の複数本を用いて多芯系超電導体を得る場合におけ
る当該金属パイプ１の装填パイプとして用いる（第３図
）。なお、多芯系超電導体を得る場合においては、酸化
物超電導体の粉末を充填するための金属バイブとして、
耐酸化性金属で被覆処理したステンレスバイブのほか、
銀、銅、チタン、アルミニウムなどの適宜な金属からな
るパイプを用いてよい。In the present invention, a stainless steel pipe coated with an oxidation-resistant metal is used for filling oxide superconductor powder (second
figure). Further, it is used as a loading pipe for a metal pipe 1 when a multicore superconductor is obtained using a plurality of metal vibrators 1 filled with oxide superconductor powder (FIG. 3). In addition, when obtaining a multicore superconductor, a metal vibrator for filling the oxide superconductor powder is used.
In addition to stainless steel vibrators coated with oxidation-resistant metal,
A pipe made of a suitable metal such as silver, copper, titanium, aluminum, etc. may be used.
当該ステンレスパイプ、ないし金属バイブに酸化物超電
導体の粉末を充填してなる充填体、あるいは当該ステン
レスパイプ内に複数本の該充填体を納めた装填体は、必
要に応じ伸線処理や偏平化処理等により所望の形状、例
えば丸形やテープ形等に塑性加工したのち、焼結処理に
供される。The stainless steel pipe or metal vibrator is filled with oxide superconductor powder, or the stainless steel pipe is filled with a plurality of the filled bodies, which may be wire-drawn or flattened as necessary. After being plastically worked into a desired shape, such as a round shape or tape shape, by processing, etc., it is subjected to a sintering treatment.
焼結処理における焼結温度は、酸化物超電導体の種類等
に応じ適宜に決定される。一般には７００〜１２００℃
であり、その加熱手段は任意である。また、焼結雰囲気
は酸化物超電導体に応し決定される。焼結時間は通例、
２００時間以下、就中２〜１５０時間であるがこれに限
定されない。The sintering temperature in the sintering process is appropriately determined depending on the type of oxide superconductor, etc. Generally 700-1200℃
The heating means is arbitrary. Further, the sintering atmosphere is determined depending on the oxide superconductor. The sintering time is typically
The duration is 200 hours or less, particularly 2 to 150 hours, but is not limited thereto.
前記により通例、酸化物超電導体の直径ないし層厚ｌＯ
μｌＩｌ〜５ ｍｍ 、金属層の厚さ１μＩ１１〜２１
Ｉｌ１１の超電導体、あるいはかかる超電導体の複数本
を有する多芯体が得られるが、その寸法等、超電導体の
形態は任意である。According to the above, the diameter or layer thickness of the oxide superconductor lO
μlIl~5 mm, metal layer thickness 1μI11~21
A superconductor of Il11 or a multicore body having a plurality of such superconductors can be obtained, but the shape of the superconductor, such as its size, is arbitrary.
発明の効果
本発明によれば耐酸化性金属で被覆処理したステンレス
パイプを用いたので、焼結処理時に未反応成分が分解し
てガスが生じても、パイプが凹凸化、ないし膨大化する
ことを防止でき、寸法精度、パイプとの密着性に優れる
単芯系ないし多芯系の超電導体を得ることができる。Effects of the Invention According to the present invention, since a stainless steel pipe coated with an oxidation-resistant metal is used, even if unreacted components decompose during the sintering process and gas is generated, the pipe will not become uneven or bulky. It is possible to obtain a single-core or multi-core superconductor that has excellent dimensional accuracy and adhesion to pipes.
実施例ｌ
Ｂ１２−ｔ Ｐｂｔ Ｓｒ２ Ｃａ２Ｃｕ３０ｈ （ｇ
＝０．２）からなる平均粒径３０ｍの酸化物超電導体
の粉末を内外面を銀で被覆した外径６順、肉厚２鴫のス
テンレスパイプに充填（空隙率約１２％）シ、これを伸
線処理して直径１．０−の線材とした。次に、前記線材
を約り０℃／時間の昇温速度で８４０℃に加熱し、この
温度を約１００時間維持したのち１０時間かけて室温ま
で徐冷することにより焼結処理した。Example l B12-t Pbt Sr2 Ca2Cu30h (g
Powder of oxide superconductor with an average particle diameter of 30 m consisting of 0.2) was filled into a stainless steel pipe with an outer diameter of 6 and a wall thickness of 2, whose inner and outer surfaces were coated with silver (porosity of about 12%). was wire-drawn to obtain a wire rod with a diameter of 1.0-. Next, the wire rod was heated to 840° C. at a temperature increase rate of about 0° C./hour, maintained at this temperature for about 100 hours, and then slowly cooled to room temperature over 10 hours to undergo a sintering treatment.
得られた超電導体に膨大部は認められず、寸法精度ない
し形態の均一性に優れていた。また、その臨界温度は１
０５にで、臨界電流密度は２ Ｘ １０’ Ａ／ ｃＪ
（７７、３Ｋ ）であった。なお、臨界温度は０．１
Ａ ／ ｃｔの電流密度下、液体ヘリウムで冷却しなか
ら４端子法（こより電気抵抗の温度による変化を測定し
、電圧端子間の発生電圧がＯとなったときの温度である
。また、臨界電流密度はパワーリードと共に液体窒素で
冷却しながら徐々に電流値をあげて４′ＩＡ子法により
電圧端子間の電圧の印加電流による変化を測定し、Ｘ−
Ｙレコーダーにおいて１μＶ ／ ｃｍの電圧が出現し
たときの電流値を超電導体の断面積で除した値である。The obtained superconductor did not have any bulges and was excellent in dimensional accuracy and uniformity of shape. Also, its critical temperature is 1
At 05, the critical current density is 2 X 10' A/cJ
(77,3K). Note that the critical temperature is 0.1
Under a current density of A/ct, the change in electrical resistance due to temperature is measured using the four-terminal method (without cooling with liquid helium), and this is the temperature when the voltage generated between the voltage terminals becomes O. The current density was determined by gradually increasing the current value while cooling the power lead with liquid nitrogen and measuring the change in voltage between the voltage terminals due to the applied current using the 4'IA method.
This is the value obtained by dividing the current value when a voltage of 1 μV/cm appears in the Y recorder by the cross-sectional area of the superconductor.
比較例
ステンレスパイプに代えて銀パイプを用いたほかは実施
例１に準して超電導体を得た。この超電導体は厚さ方向
及び幅方向において、目視観察によってもわかる程度に
凹凸の大きいものであり、厚さが約ｌｌ１ＩＩ１１にも
及ぶ膨大部を有するものであった。Comparative Example A superconductor was obtained in accordance with Example 1, except that a silver pipe was used in place of the stainless steel pipe. This superconductor had large irregularities in the thickness direction and the width direction, as could be seen by visual observation, and had an enormous portion with a thickness of about 111111.
実施例２
比較例に準じて酸化物超電導体の粉末を充填した銀バイ
ブを形成し、その４本を内外面を銀で被覆した外径１３
ｍ＋、肉厚３ｍのステンレスパイプに装填し、これを伸
線処理して直径約３Ｍの線材としたのち、実施例１に準
じて焼結処理した。Example 2 Silver vibes filled with oxide superconductor powder were formed according to the comparative example, and four of them were coated with silver on the inner and outer surfaces and had an outer diameter of 13 mm.
m+, a stainless steel pipe with a wall thickness of 3 m was loaded, and this was wire-drawn to make a wire rod with a diameter of about 3 M, and then sintered according to Example 1.
得られた多芯系超電導体に膨大部は認められず、寸法精
度ないし形態の均一性に優れていた。またその臨界温度
は１０５にで、臨界電流密度は２ Ｘ １０３Ａ ／
ｃ＋ｊ （７７，３Ｋ ）であった。No bulge was observed in the obtained multicore superconductor, and it had excellent dimensional accuracy and uniformity of form. Its critical temperature is 105, and its critical current density is 2 x 103A/
c+j (77,3K).
第１図は充填体の断面図、第２図、第３図はステンレス
パイプの適用例の説明断面図、第４図は従来の超電導体
の説明図である。
１：金属パイプ
２二酸化物超電導体の粉末
１１；ステンレス層
１２：耐酸化性金属層FIG. 1 is a sectional view of a filling body, FIGS. 2 and 3 are sectional views illustrating an example of application of a stainless steel pipe, and FIG. 4 is an illustrative diagram of a conventional superconductor. 1: Metal pipe 2 Dioxide superconductor powder 11; Stainless steel layer 12: Oxidation-resistant metal layer
Claims (2)
処理して超電導体を製造するにあたり、金属パイプとし
て内外面を耐酸化性金属で被覆処理したステンレスパイ
プを用いることを特徴とする超電導体の製造方法。1. A superconductor characterized in that a stainless steel pipe whose inner and outer surfaces are coated with an oxidation-resistant metal is used as the metal pipe in manufacturing the superconductor by sintering oxide superconductor powder filled in a metal pipe. Production method.
本を、内外面を耐酸化性金属で被覆処理したステンレス
パイプ内に装填して加熱処理し、金属パイプ内の酸化物
超電導体の粉末を焼結処理することを特徴とする超電導
体の製造方法。2. Multiple metal pipes filled with oxide superconductor powder are placed inside a stainless steel pipe whose inner and outer surfaces are coated with oxidation-resistant metal, and heat treated to sinter the oxide superconductor powder inside the metal pipe. 1. A method for producing a superconductor, which comprises performing a crystallization treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1192398A JPH0360456A (en) | 1989-07-25 | 1989-07-25 | Production of superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1192398A JPH0360456A (en) | 1989-07-25 | 1989-07-25 | Production of superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0360456A true JPH0360456A (en) | 1991-03-15 |
Family
ID=16290646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1192398A Pending JPH0360456A (en) | 1989-07-25 | 1989-07-25 | Production of superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0360456A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50161421A (en) * | 1974-06-21 | 1975-12-27 | ||
| JPS63307618A (en) * | 1987-06-06 | 1988-12-15 | Sumitomo Electric Ind Ltd | Manufacture of superconductive wire |
| JPS63307622A (en) * | 1987-06-08 | 1988-12-15 | Sumitomo Electric Ind Ltd | Manufacture of superconductive wire |
| JPS6448650A (en) * | 1987-08-19 | 1989-02-23 | Nittetsu Hard Kk | Roll for continuous casting having breakage resistance and wear resistance |
| JPS6471007A (en) * | 1987-05-13 | 1989-03-16 | Sumitomo Electric Industries | Superconductive wire and superconductive coil and their manufacture |
-
1989
- 1989-07-25 JP JP1192398A patent/JPH0360456A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50161421A (en) * | 1974-06-21 | 1975-12-27 | ||
| JPS6471007A (en) * | 1987-05-13 | 1989-03-16 | Sumitomo Electric Industries | Superconductive wire and superconductive coil and their manufacture |
| JPS63307618A (en) * | 1987-06-06 | 1988-12-15 | Sumitomo Electric Ind Ltd | Manufacture of superconductive wire |
| JPS63307622A (en) * | 1987-06-08 | 1988-12-15 | Sumitomo Electric Ind Ltd | Manufacture of superconductive wire |
| JPS6448650A (en) * | 1987-08-19 | 1989-02-23 | Nittetsu Hard Kk | Roll for continuous casting having breakage resistance and wear resistance |
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