JPH01176607A - Manufacture of oxide superconductive linear body - Google Patents
Manufacture of oxide superconductive linear bodyInfo
- Publication number
- JPH01176607A JPH01176607A JP62335978A JP33597887A JPH01176607A JP H01176607 A JPH01176607 A JP H01176607A JP 62335978 A JP62335978 A JP 62335978A JP 33597887 A JP33597887 A JP 33597887A JP H01176607 A JPH01176607 A JP H01176607A
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- superconductor
- cooling
- core material
- linear body
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 239000002887 superconductor Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000011162 core material Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 7
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000010587 phase diagram Methods 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910017941 Ag—Li Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001252 Pd alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 238000005245 sintering 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
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は芯材の外周が超電導体となる酸化物で被覆され
ている酸化物超電導線条体の製造方法に関するものであ
り、同酸化物を粉末として使用するのではなく溶融体と
して使用するようにしたものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing an oxide superconducting wire body in which the outer periphery of a core material is coated with an oxide that becomes a superconductor. Instead of using it as a powder, it is used as a melt.
（従来技術）
液体窒素温度以上で超電導状態を示す酸化物超電導体は
既に知られている。この酸化物Ｍｉ電導体の代表的なも
のとしてＹ−Ｂａ−Ｃｕ−０系がある。この酸化物超電
導体を線材化する方法として従来は次のような方法があ
った。(Prior Art) Oxide superconductors that exhibit a superconducting state at temperatures above liquid nitrogen temperature are already known. A typical example of this oxide Mi conductor is the Y-Ba-Cu-0 system. Conventionally, the following methods have been used to make wire rods from this oxide superconductor.
（１）原料の混合酸化物粉末をＡｇ、Ａｇ合金、Ｃｕ合
金等の金属パイプ内に充填した後、これを冷間加工（例
えば冷間伸線、スェージング、溝ロール、平ロール等で
線あるいは薄板に加工）して所望寸法の線状体とし、続
いて熱処理を施す方法（２）原料の混合酸化物粉末とバ
インダーとを混練した後、押出加工等により線材化する
方法。(1) After filling the raw material mixed oxide powder into a metal pipe made of Ag, Ag alloy, Cu alloy, etc., it is processed into wire or (2) Method of kneading mixed oxide powder as a raw material and a binder and then forming it into a wire rod by extrusion processing or the like.
（３）芯材の外周上に、原料の混合酸化物粉末とバイン
ダーとの混練物をコーティングし、次いで脱□バインダ
ーを含む熱処理を行なう方法。(3) A method in which the outer periphery of the core material is coated with a kneaded mixture of raw mixed oxide powder and a binder, and then heat treatment including removal of the binder is performed.
（従来技術の問題点） しかし上記の従来方法では次のような問題があった。(Problems with conventional technology) However, the above conventional method has the following problems.
（１）焼成後の焼結体の密度が真密度に近い値にならな
いので臨界電波密度が小さくなる。(1) Since the density of the sintered body after firing does not reach a value close to the true density, the critical radio wave density becomes small.
（２）製造方法が熱平衡過程によるため焼結や加熱過程
においてＹＢ ａ２Ｃｕ３Ｏ７−Ｘ結晶粒の粒界に異相
であるＹ７ ＢａＣｕＯ３，ＢａＣｕＯｚ、Ｙ２０３
、ＣｕＯなどが形成され、臨界電流密度を低下させると
いった特性劣化の原因になっている。(2) Because the manufacturing method is based on a thermal equilibrium process, Y7 BaCuO3, BaCuOz, Y203, which has a different phase at the grain boundaries of YBa2Cu3O7-X crystal grains during sintering and heating processes.
, CuO, etc. are formed, which causes characteristic deterioration such as a decrease in critical current density.
（発明の目的）
本発明の目的は高緻密度で、臨界温度ＴＣや臨界電流密
度Ｊ、の高い酸化物超電導線条体を容易に製造できる方
法を実現することにある。(Objective of the Invention) An object of the present invention is to realize a method for easily manufacturing an oxide superconducting wire having high density, critical temperature TC, and critical current density J.
（問題点を解決するための手段）
本発明の酸化物超電導線条体の製造方法は第１図のよう
に、組成がＹＢａ２Ｃｕ３Ｏ？−Ｘ −ＢａＣｕＯ２−
ＣｕＯ三元状態図で示される範囲にある超電導体となる
酸化物溶融体ｌ中に、線状の芯材２を通し、これを１０
３〜１０６℃／ｓｅｃの範囲内の冷却速度で冷却して外
周が超電導体となる酸化物３で被覆された酸化物超電導
線条体を製造するようにしたことを特徴とするものであ
る。(Means for Solving the Problems) The method for manufacturing the oxide superconducting wire of the present invention is as shown in FIG. 1, in which the composition is YBa2Cu3O? -X -BaCuO2-
A linear core material 2 is passed through the molten oxide l that becomes a superconductor within the range shown in the CuO ternary phase diagram, and is
The present invention is characterized in that an oxide superconducting wire body whose outer periphery is coated with an oxide 3 that becomes a superconductor is produced by cooling at a cooling rate within the range of 3 to 106° C./sec.
ｔ５１図は本発明の１実施例である。同図において１は
超電導体となる酸化物溶融体であり、これは溶解炉５内
において予め溶融されて８００℃から１２００℃の温度
範囲に保持されている０本発明では繰出しリール６から
緑り出される線状の芯材２を酸化物溶融体１中に通し、
それを冷却装置７で冷却して外周が超電導体３で被覆さ
れた酸化物超電導線条体４とした後、巻取リリール８で
巻き取るようにしたものである。The t51 diagram is one embodiment of the present invention. In the figure, 1 is an oxide melt that becomes a superconductor, and this is melted in advance in a melting furnace 5 and maintained at a temperature range of 800°C to 1200°C. The linear core material 2 taken out is passed through the oxide melt 1,
This is cooled by a cooling device 7 to form an oxide superconducting wire body 4 whose outer periphery is coated with a superconductor 3, and then wound up by a take-up reel 8.
上記の芯材２には銀や白金またはその合金（Ａｇ、 Ａ
ｇ−Ｃｕ、 Ａｇ−Ｌｉ、 Ａ’ｇ−Ｍｎ、 Ｐｔ、Ｐ
ｔ−Ｒｈ、Ｐｔ−Ｒｅ）などで作られ′たｉ材が用いら
れる。芯材２は全体がそれらで作られた□ものではなく
、表層だけが銀、白金又はその合金で作られた線材であ
ってもよい。The core material 2 is made of silver, platinum, or an alloy thereof (Ag, A
g-Cu, Ag-Li, A'g-Mn, Pt, P
A material made of materials such as t-Rh, Pt-Re) is used. The core material 2 is not entirely made of these materials, and only the surface layer may be a wire material made of silver, platinum, or an alloy thereof.
上記の酸化物溶融体１の組成はＹＢａ２Ｃｕ３Ｏ７−Ｘ
−ＢａＣｕＯ４−ＣｕＯ三元状態図で示される範囲に
あることが望ましい、また酸化物溶融体１の温度は１２
００℃以下であることが望ましい、また冷却速度は１０
３〜ｂ
が望しい。The composition of the above oxide melt 1 is YBa2Cu3O7-X
-BaCuO4-CuO It is desirable that the temperature is within the range shown in the ternary phase diagram, and the temperature of the oxide melt 1 is 12
It is desirable that the temperature is below 00°C, and the cooling rate is 10°C.
3-b is desirable.
（作用）
本発明の製造方法は酸化物粉末の成形加工ではなく、酸
化物の溶融−凝固という方法であるため、酸化物を粉末
として使用する場合に比して得られる焼結体は高密度と
なり、臨界電流密度が向上する。(Function) Since the manufacturing method of the present invention involves melting and solidifying the oxide rather than molding the oxide powder, the sintered body obtained has a higher density than when using the oxide as a powder. Therefore, the critical current density improves.
また酸化物溶融融体ｌを急冷することで酸化物超電導動
体の粒界に析出する異相が少なく、高緻密な線条体が得
られる。Moreover, by rapidly cooling the oxide melt l, there are fewer foreign phases precipitated at the grain boundaries of the oxide superconductor, and a highly dense filament can be obtained.
（実施例）
本発明の実施例では酸化物溶融体１の組成を下記の６！
ｌｊ類とした。(Example) In the example of the present invention, the composition of the oxide melt 1 is as follows: 6!
It was classified as class lj.
Ｙ：Ｂａ：Ｃｕ
■ ｌ ： １：１
■ ｌ：１．８：３
■ １：２．２：３
■ １： ２：３
１ ００．１１：２：３
■ ０．８ ： １．９： ３
各々の酸化物溶融体１を１４００℃、１１５０℃および
９５０℃に保持し、その中を直径ｌｌ１ｍφのＡｇ−５
０ｗｔ％Ｐｄ合金線２を２０ ｍ ／’ ｓｅａで通過
させた。しかる後、９００℃の酸素流気中で６時間加熱
し、２℃／ｗｉｎで３Ｏ０℃まで冷却してから大気中に
取出して臨界温度（Ｔｃ）と、７７に、ＩＴにおける臨
界電流密度Ｃ１ｃ）の測定を行なった。その結果は次の
通りであった。Y:Ba:Cu ■ l: 1:1 ■ l:1.8:3 ■ 1:2.2:3 ■ 1: 2:3 1 00.11:2:3 ■ 0.8: 1.9: 3 Each oxide melt 1 was maintained at 1400°C, 1150°C and 950°C, and a Ag-5 with a diameter of 11 mφ was placed inside.
A 0 wt% Pd alloy wire 2 was passed through at 20 m/' sea. Thereafter, it was heated in an oxygen stream at 900°C for 6 hours, cooled at 2°C/win to 300°C, and then taken out into the atmosphere to reach the critical temperature (Tc) and 77, the critical current density at IT (C1c). Measurements were made. The results were as follows.
（以下余白）
第１表
上表より明らかなように酸化物溶融体温度を１４００℃
、１１５０℃、９５０℃としたときの得られる線材の臨
界温度（↑Ｃ）は、酸化物溶融体の組成間で差が少ない
が、臨界電流密度（Ｓ、）は組成０００群と０００群と
でかなりの差がある。その理由は！１成■（す■のもの
では粒界に第２相が多く観察されたことと対応しており
、粒界に高抵抗物質が介在することによると思われる。(Left below) As is clear from the table above in Table 1, the temperature of the oxide melt was set at 1400°C.
, 1150℃ and 950℃, there is little difference in the critical temperature (↑C) of the resulting wire between the compositions of the oxide melt, but the critical current density (S, ) differs between the compositions 000 group and 000 group. There is a considerable difference. The reason is! This corresponds to the fact that a large number of second phases were observed at grain boundaries in the case of 1-formation (2), which is thought to be due to the presence of a high-resistance substance at the grain boundaries.
また上記の第１表より組成■■■のものは、製法上の条
件が良くても特性の良好なａｉ電導線条体は得にくい。Furthermore, as shown in Table 1 above, it is difficult to obtain an ai conductive wire body with good characteristics even if the manufacturing process conditions are good for those having compositions ■■■.
一方■〜■の組成のものは９５０〜１１５０℃程度の融
液温度で加工することにより高い工、値の線材が得られ
ることが判る。On the other hand, it can be seen that wire rods with compositions (1) to (2) having high workability and value can be obtained by processing at a melt temperature of about 950 to 1150°C.
（実施例２）
実施例１における■■（６）の組成の酸化物溶融体１を
用い、融液温度を１１００℃とし、その溶融体ｌ中を０
．５ｍｍφの白金−１３７０ジウム線を２００ｍ／ｓｅ
ｃ、２０ｍ／ｓｅｅ、 ２ｍ／ｓｅｅ、 ０．２ｍ／ｓ
ｐ＋：、 ０．０２ｍ／ｓｅｅの速度で通過させて酸化
物溶融体ｌを被覆し、た後、得られた各々の線材を実施
例Ｉと同様に９００℃で６時間加熱したのち、第２表に
示した冷却条件にて冷却してから、７７Ｋ、ＩＴにおけ
る臨界１！流密度（１ｃ）の測定を行なった。得られた
結果は次の通りであった。(Example 2) Using the oxide melt 1 having the composition of
．． 5mmφ platinum-1370dium wire at 200m/se
c, 20m/see, 2m/see, 0.2m/s
p+: After coating the oxide melt l by passing at a speed of 0.02 m/see, each of the obtained wires was heated at 900°C for 6 hours in the same manner as in Example I, and then the second After cooling under the cooling conditions shown in the table, the temperature reached 77K, criticality 1 in IT! The flow density (1c) was measured. The results obtained were as follows.
第２表
上表から明らかな如く■■■の組成であっても線速度及
び冷却速度が早過ぎても遅すぎてもむ値の高い線材が得
られないことがわかる。As is clear from the upper table of Table 2, it can be seen that even with the composition of ■■■, a wire with a high tensile strength cannot be obtained if the linear velocity and cooling rate are too fast or too slow.
（発明の効果） 本発明の製造方法は次のような効果がある。(Effect of the invention) The manufacturing method of the present invention has the following effects.
（１）異相析出が少ないので高臨界電流密度の酸化物超
電導線条体が得られる。(1) An oxide superconducting wire with a high critical current density can be obtained because there is little foreign phase precipitation.
（２） 、ｔｆｌ電導体となる酸化物を粉末として使用
するのではなく溶融体として使用するたちのであるため
高密度の酸化物超電導線条体が得られる。(2) Since the oxide that becomes the TFL conductor is used as a melt rather than as a powder, a high-density oxide superconducting wire can be obtained.
（３）長尺な酸化物超電導線条体を容易に得ることがで
きる。(3) Elongated oxide superconducting wires can be easily obtained.
（４）線材の形状にｆｔ１Ｊ約されないので、丸線、テ
ープ、編細線といった各種線材の製造に広く適用できる
。(4) Since ft1J is not limited to the shape of the wire, it can be widely applied to the production of various wires such as round wires, tapes, and knitted wires.
（５）臨界温度〒Ｃや臨界電流密度Ｊ０が高い高性脂の
酸化物超電導線条体が得られる。(5) A high-fat oxide superconducting wire body having a high critical temperature 〒C and a high critical current density J0 can be obtained.
第１図は本発明の製造方法の一例を示す説＃ｉ図である
。
１は酸化物溶融体
２は芯材
３はｍ電導体となる酸化物FIG. 1 is a diagram #i showing an example of the manufacturing method of the present invention. 1 is an oxide melt 2 is a core material 3 is an oxide that becomes an m conductor
Claims (3)
ＣｕＯ＿２−ＣｕＯ三元状態図で示される範囲にある超
電導体となる酸化物溶融体１中に、線状の芯材２を通し
、これを１０＾３〜１０＾６℃／ｓｅｃの範囲内の冷却
速度で冷却して外周が超電導体となる酸化物３で被覆さ
れた酸化物超電導線条体を製造するようにしたことを特
徴とする酸化物超電導線条体の製造方法。(1) Composition is YBa_2Cu_3O_7_-_x-Ba
A linear core material 2 is passed through the oxide melt 1, which becomes a superconductor within the range shown in the CuO_2-CuO ternary phase diagram, and heated at a temperature of 10^3 to 10^6°C/sec. 1. A method for manufacturing an oxide superconducting wire, which comprises manufacturing an oxide superconducting wire whose outer periphery is coated with an oxide 3 that becomes a superconductor by cooling at a cooling rate.
の合金であるものを用いることを特徴とする特許請求の
範囲第１項記載の酸化物超電導線条体の製造方法。(2) The method for producing an oxide superconducting wire according to claim 1, characterized in that the entire core material 2 or only its surface layer is made of silver, platinum, or an alloy thereof.
とを特徴とする特許請求の範囲第１項記載の酸化物超電
導線条体の製造方法。(3) The method for producing an oxide superconducting wire body according to claim 1, wherein the temperature of the oxide melt 1 is 1200° C. or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62335978A JPH01176607A (en) | 1987-12-29 | 1987-12-29 | Manufacture of oxide superconductive linear body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62335978A JPH01176607A (en) | 1987-12-29 | 1987-12-29 | Manufacture of oxide superconductive linear body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01176607A true JPH01176607A (en) | 1989-07-13 |
Family
ID=18294431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62335978A Pending JPH01176607A (en) | 1987-12-29 | 1987-12-29 | Manufacture of oxide superconductive linear body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01176607A (en) |
-
1987
- 1987-12-29 JP JP62335978A patent/JPH01176607A/en active Pending
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