JPS63237314A - Manufacture of superconductive compound material - Google Patents
Manufacture of superconductive compound materialInfo
- Publication number
- JPS63237314A JPS63237314A JP62072787A JP7278787A JPS63237314A JP S63237314 A JPS63237314 A JP S63237314A JP 62072787 A JP62072787 A JP 62072787A JP 7278787 A JP7278787 A JP 7278787A JP S63237314 A JPS63237314 A JP S63237314A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- powder
- oxide
- paint
- binder
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 150000001875 compounds Chemical class 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 25
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims description 27
- 239000002887 superconductor Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 12
- 238000010304 firing Methods 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 229910052790 beryllium Inorganic materials 0.000 claims description 2
- 229910052738 indium Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910052706 scandium Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 2
- 239000003960 organic solvent Substances 0.000 claims 2
- 229910052690 Einsteinium Inorganic materials 0.000 claims 1
- 239000004593 Epoxy Substances 0.000 claims 1
- 239000004642 Polyimide Substances 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000004815 dispersion polymer Substances 0.000 claims 1
- 229920001721 polyimide Polymers 0.000 claims 1
- 239000002952 polymeric resin Substances 0.000 claims 1
- 238000001953 recrystallisation Methods 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 claims 1
- 229910052716 thallium Inorganic materials 0.000 claims 1
- 239000003973 paint Substances 0.000 abstract description 22
- 239000002245 particle Substances 0.000 abstract description 17
- 239000000919 ceramic Substances 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract 2
- 230000001112 coagulating effect Effects 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 239000013528 metallic particle Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- 235000019402 calcium peroxide Nutrition 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 102100025342 Voltage-dependent N-type calcium channel subunit alpha-1B Human genes 0.000 description 1
- 101710088658 Voltage-dependent N-type calcium channel subunit alpha-1B Proteins 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 229910052718 tin Inorganic materials 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)
- Superconductor Devices And Manufacturing Methods Thereof (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、任意の形状に形成が可能な超伝導性複合材の
作製方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing a superconducting composite material that can be formed into any shape.
（従来の技術およびそめ問題点）
超伝導現象は超伝導臨界温度（Ｔ ｃ ）以下において
、電気抵抗がゼロになる現象であるが、この状態で電流
を流した場合、エネルギを消費しない、金属・合金系の
これまでの最高のＴｃは、Ｎｂ、Ｇｅの２３．８ Ｋで
ある。高いＴｃを持つ合金系は Ａ１５構造という化合
物であり、非常に脆く加工することが難しい。このため
、これら材料を線材等に加工する場合、補助材の利用や
、加工性の良い状態で、線材等に成形した後、熱処理に
より所定の化合物超伝導体を形成する等、いくつかの方
法が開発されている。例えば。(Prior art and related problems) Superconductivity is a phenomenon in which electrical resistance becomes zero below the superconducting critical temperature (T c ), but when a current is passed in this state, no energy is consumed in the metal.・The highest Tc of alloy systems to date is 23.8 K for Nb and Ge. The alloy system with high Tc is a compound with A15 structure, which is extremely brittle and difficult to process. For this reason, when processing these materials into wire rods, etc., there are several methods such as using auxiliary materials, forming them into wire rods, etc. in a state with good workability, and then forming a predetermined compound superconductor through heat treatment. is being developed. for example.
Ｃｕパイプ等に化合物超伝導材料を埋め込み、このパイ
プを焼きなまし、引き抜きを多数回繰り返して線材にす
る方法、Ｎｂの粉末とＳｎの粉末をＮｂパイプに充填し
、所定の形状比してから加熱し、Ｎ１ｇＳｎ等を作製す
る方法、或は、溶融しているＧａ浴中にＶテープを通過
させた後、熱処理してＶｚＧａ層を形成する方法等があ
り、超伝導材料に適した方法がある。何れもが、化合物
超伝導体そのものが加工性がないことに起因する。高い
Ｔｃを持つ材料は、冷却方法の容易さから、また、冷却
コストの観点から実用的価値が高い、Ｎｂ、Ｇｅ等の超
伝導材を使用する場合、適当な冷媒が存在しないため、
高価な液体Ｈｅ（４，２Ｋ）を使用することになり、使
用コストは著しく高いものになっている。A method of embedding a compound superconducting material in a Cu pipe, etc., annealing the pipe, and repeating drawing many times to make a wire rod.A method of filling a Nb pipe with Nb powder and Sn powder, heating it after forming a predetermined shape ratio. , N1gSn, etc., or a method of passing a V tape through a molten Ga bath and then heat-treating it to form a VzGa layer, which methods are suitable for superconducting materials. Both are due to the fact that the compound superconductor itself has no processability. Materials with high Tc have high practical value from the viewpoint of easy cooling methods and cooling costs.When using superconducting materials such as Nb and Ge, there is no suitable refrigerant.
Since expensive liquid He (4.2K) is used, the cost of use is extremely high.
ところが、最近、（Ｌａｔ−ｘＢａｘ）ｚｃｕ０４．
（Ｌａｔ−ｘＳｒｘ）ｇｃｕ０４． （Ｙ＋−ｘＢａｘ
）Ｃｕ０４等の酸化物が３０〜１００数１０ Ｋという
高いＴｃを示すことが分かうてきた。However, recently, (Lat-xBax)zcu04.
(Lat-xSrx)gcu04. (Y+-xBax
) It has been found that oxides such as Cu04 exhibit a high Tc of 30 to several 10 K.
７７に以上のＴｃを持つ材料では、非常に安価な液体Ｎ
Ｘが使用できる。上記の酸化物にはこの条件を満足する
ものがあり、実用性の高い材料である。For materials with Tc greater than 77, very cheap liquid N
X can be used. Some of the above oxides satisfy this condition and are highly practical materials.
しかし、酸化物は、加工性は全くなく、最初に述べた方
法で線材、厚膜、配線等に加工することも容易でなく、
使用上に大きな欠点があった。However, oxides have no processability, and it is not easy to process them into wires, thick films, wiring, etc. using the method mentioned above.
There were major drawbacks in its use.
（問題点を解決するための手段）。(Means for solving problems).
本発明は、酸化物超伝導体の難加工性の問題を解決し、
任意の形状の酸化物超伝導体を含む複合材を容易に形成
する方法を提供するものである。The present invention solves the problem of difficulty in processing oxide superconductors,
The present invention provides a method for easily forming a composite material containing an oxide superconductor of any shape.
具体的には、金属塗料にＴｃの高い酸化物超伝導体の粉
末を分散し、その塗料を金属あるいはセラミックス等の
耐熱性基板の表面に塗布し、その後、数１００℃で焼成
することにより、酸化物超伝導体と金属からなる超伝導
性複合材を形成する。酸化物超伝導体は、数種の酸化物
や炭化物等を混合させ、８００℃〜１３００℃の温度で
焼成して作製できる。この焼成された酸化物超伝導体は
比較的硬い状態を示し、十分使用に耐えるものであるが
、複雑な形状や薄層状の酸化物超伝導材を形成すること
は、著しく困難である。Specifically, powder of an oxide superconductor with a high Tc is dispersed in a metal paint, the paint is applied to the surface of a heat-resistant substrate such as metal or ceramics, and then fired at several hundred degrees Celsius. Form a superconducting composite consisting of an oxide superconductor and metal. Oxide superconductors can be produced by mixing several types of oxides, carbides, etc. and firing the mixture at a temperature of 800°C to 1300°C. Although this fired oxide superconductor exhibits a relatively hard state and is sufficiently durable for use, it is extremely difficult to form an oxide superconductor material with a complicated shape or a thin layer.
焼成された酸化物超伝導体は、一般のセラミックスと同
様に、衝撃によって容易に破壊されるが、粉体になった
としても個々の粒子は超伝導状態を示す、しかし、粉体
を高圧でプレスして固めた塊は、全体として高抵抗の状
態を示す。Sintered oxide superconductors, like general ceramics, are easily destroyed by impact, but even when turned into powder, individual particles exhibit superconductivity. The pressed and solidified mass exhibits a state of high resistance as a whole.
これは、粉体の単一粒子はＴｃ以下で超伝導状態を示し
ているにも関わらず、粉体同士の密着性が悪いために、
高い抵抗を示すことになる。This is because even though a single particle of powder exhibits a superconducting state below Tc, the adhesion between powder particles is poor.
It will show high resistance.
高圧でプレスした状態では、接触部の抵抗を低下させる
ことも可能であるが、その用途は限られたものである。Although it is possible to reduce the resistance of the contact portion when pressed under high pressure, its use is limited.
この様に、粉体のままでは、実用に供する範囲は著しく
狭い。As described above, if the powder is used as it is, the scope of its practical use is extremely narrow.
上記酸化物超伝導体の機械的特性、加工性、及び、粉体
の接触特性等の問題点を解決するには、酸化物超伝導の
粒子そのものを加工するのではなく、個々の粒子の接触
抵抗を低下させると同時にそれらの状態が強固に固めら
れることが必要である。In order to solve the problems of the mechanical properties, processability, and powder contact characteristics of the oxide superconductor mentioned above, it is necessary to contact each particle instead of processing the oxide superconductor particles themselves. It is necessary to lower the resistance and at the same time to solidify these conditions.
この方法として、本発明では酸化物超伝導粉体を金属塗
料に分散し、それらを焼成することにより、金属粉体の
凝集効果を利用し酸化物超伝導粒子を接近させる。同時
に、酸化物粒子界面に金属を介在することになり、接触
抵抗は減少し、全体として抵抗の低い安定した複合材を
得ることができる。この状態では酸化物粒子は、金属粒
子の相互拡散で強固になった金属で覆われているため複
合材は強靭となる。As a method for this, in the present invention, oxide superconducting powder is dispersed in a metal paint, and by firing them, the oxide superconducting particles are brought close to each other by utilizing the agglomeration effect of the metal powder. At the same time, the presence of metal at the interface of the oxide particles reduces contact resistance, making it possible to obtain a stable composite material with low resistance as a whole. In this state, the oxide particles are covered with metal that has become stronger due to interdiffusion of the metal particles, making the composite material tougher.
本発明では、酸化物超伝導体として、（Ｍ１＋−１Ｍ２
ｘ）ｖＣｕＯｚ （０＜Ｘ＜１．１≦Ｙ≦２．２≦２≦
４、肘は■族金属（Ｓｃ、Ｙ、Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ
、Ｐｍ、Ｙｂ、Ｌｕ、Ｂ、Ａｌ、Ｇａ。In the present invention, (M1+-1M2
x) vCuOz (0<X<1.1≦Y≦2.2≦2≦
4. Elbows are made of group ■ metals (Sc, Y, La, Ce, Pr, Nd
, Pm, Yb, Lu, B, Al, Ga.
Ｉｎ、ＴＬＥｓ）、Ｍ２は■族金属（Ｂｅ、 Ｍｇ、
Ｃｄｌ Ｓｒ、 Ｂａ、 Ｚｎ。In, TLEs), M2 is group II metal (Be, Mg,
Cdl Sr, Ba, Zn.
Ｃｄ、 Ｈｇ、 Ｃｆ） ）の中から選ばれた酸化物の
粉体であり、金属粉体として、Ａｇ、Ｃｕ、Ａｌ等の比
較的融点の低い金属あるいは合金と更に、高分子系バイ
ンダとその溶剤の混合体を作製し、それを塗布した後、
焼成することにより超伝導現象を示す強固な複合材料を
容易に得るものである。It is a powder of an oxide selected from Cd, Hg, Cf), and the metal powder is a metal or alloy with a relatively low melting point such as Ag, Cu, Al, etc., and a polymeric binder and its After making the solvent mixture and applying it,
By firing, a strong composite material exhibiting superconductivity can be easily obtained.
（実施例）
〔実施例１〕
エチルセルロース２ｇとブチルアセテート１８ｇに１Ｏ
ＢＩＩＩのＡｇ粉Ｌｏｇを混合したＡ、塗料２０ｇにＴ
ｃ＝８５にの（Ｙ（＋、 ５Ｂａａ、 ５）ＣａＯ２粉
体２０ｇを混合させた。(Example) [Example 1] 2 g of ethyl cellulose and 18 g of butyl acetate with 1O
A mixed with BIII Ag powder Log, T with 20g of paint
20g of (Y(+, 5Baa, 5)CaO2 powder with c=85 was mixed.
この複合塗料を１インチの石英基板上に厚さ１ｍ＋−に
塗布し、４００℃で１時間焼成した。また、同時に、酸
化物を混入しないＡｇｅ料のみを、もう一枚の石英基板
上に同様の条件で塗布後、焼成した。This composite paint was applied to a thickness of 1 m+- on a 1-inch quartz substrate and baked at 400° C. for 1 hour. At the same time, only the Age material containing no oxide was applied onto another quartz substrate under the same conditions, and then fired.
これら焼成した複合材を３＋ｗａ＋Ｘ１０＋ｍの大きさ
に切り出し、電気抵抗測定用試料とした。第１図は４端
子法で測定した電気抵抗の測定温度依存性を示す、１の
点線は、Ａｇ塗料のみから作製されたＡ、材の抵抗変化
であり、温度の減少と共に抵抗は減少することを示す、
２の実線は、酸化物とＡｇの複合材の電気抵抗の変化を
示したものである。温度の低下と共に、抵抗は減少する
が、９０ Ｋ付近で急激に減少し、低温側で抵抗が残っ
ていることが分かる。抵抗が急激に減少する温度は、酸
化物そのもののＴｃであり、９は酸化物の８の抵抗変化
を示す。複合材でのＴｃ以下の抵抗を便宜上、残留抵抗
と名づけるとする。These fired composite materials were cut out into a size of 3+wa+X10+m and used as samples for measuring electrical resistance. Figure 1 shows the temperature dependence of electrical resistance measured using the four-terminal method.The dotted line 1 shows the resistance change of material A made only from Ag paint, and the resistance decreases as the temperature decreases. showing,
The solid line 2 shows the change in electrical resistance of the composite material of oxide and Ag. It can be seen that the resistance decreases as the temperature decreases, but sharply decreases around 90 K, and that resistance remains on the low temperature side. The temperature at which the resistance rapidly decreases is the Tc of the oxide itself, and 9 indicates the resistance change of 8 of the oxide. For convenience, the resistance below Tc in the composite material will be referred to as residual resistance.
液体Ｎ２温度（７７Ｋ）では、残留抵抗がありこの値は
、Ａｇ材の値の１７５程度である０作製された複合材は
金属的な強固な材料であった。At the liquid N2 temperature (77K), there is a residual resistance, and this value is approximately 175 of the value of the Ag material.The composite material produced was a strong metallic material.
〔実施例２〕
実施例１と同様のＡｇ塗料に、（Ｍｌ ＋ −ＸＭ２Ｘ
） ｙｃｕｏｚ（０＜Ｘ＜１．１≦Ｙ≦２．２≦２≦４
、（Ｍｌ ： Ｓｃ＋Ｙ、Ｌａ、Ｃｅ。[Example 2] The same Ag paint as in Example 1 was coated with (Ml + -XM2X
) ycuoz(0<X<1.1≦Y≦2.2≦2≦4
, (Ml: Sc+Y, La, Ce.
Ｐｒ＋Ｎｄ、Ｐｍ、Ｙｂ、Ｌｕ、Ｂ、Ａ１．Ｇａ、Ｉｎ
、Ｔ１．Ｈｓ） ％ （Ｍ２ ： Ｂｅ。Pr+Nd, Pm, Yb, Lu, B, A1. Ga, In
, T1. Hs) % (M2: Be.
Ｍｇ、Ｃａ、Ｓｒ、Ｂａ、Ｚｎ、Ｃｄｌ）Ｉｇｌｃｆ）
）からなる酸化物超伝導体の粉体を少なくとも一種類分
散させて複合塗料とし、実施例１と同様の焼成試料を作
製し、抵抗を測定した。抵抗の温度依存性は実施例１の
図１の２の変化と同様の変化を示したが、急激な抵抗の
変化が見られる温度は、酸化物自身のＴｃであり、その
温度は酸化物により異なった。Ｔｃの異なる２種類の酸
化物を分散した場合の焼成試料では、２段の急激な抵抗
減少が観測された。Ａｇ塗料に分散させる酸化物の量が
多くなると、Ｔｃ以下の残留抵抗は減少した。しかし、
複合材の強度は減少する傾向にあった。バインダとして
小量のガラスを塗料に添加すると強度は改善された。Mg, Ca, Sr, Ba, Zn, Cdl)Iglcf)
) A composite paint was prepared by dispersing at least one kind of powder of an oxide superconductor consisting of the following: ), a fired sample similar to that in Example 1 was prepared, and the resistance was measured. The temperature dependence of the resistance showed a change similar to the change in 2 in FIG. Different. In the fired sample in which two types of oxides with different Tc were dispersed, a two-step rapid decrease in resistance was observed. As the amount of oxide dispersed in the Ag paint increased, the residual resistance below Tc decreased. but,
The strength of composites tended to decrease. Strength was improved by adding small amounts of glass as a binder to the paint.
〔実施例３〕
実施例１と同様のバインダと溶剤にＣａ粉とＡｌ粉を混
ぜ、Ｃｕ塗料とＡｌ塗料を作製しルａ１．５ｓｒｏ、
ｚＣｕｂ、の粉体を混合させ複合塗料とした。 Ｃｕ塗
料では６００℃、ＡｌＰｊｉ料では３００℃で焼成した
。この様にして作製した２種類の複合材は何れも実施例
１と同じ超伝導現象を示した。この時のＴｃは３４にで
あった。[Example 3] Mix Ca powder and Al powder with the same binder and solvent as in Example 1 to prepare Cu paint and Al paint.
The powder of zCub was mixed to make a composite paint. The Cu paint was fired at 600°C, and the AlPji material was fired at 300°C. Both of the two types of composite materials produced in this manner exhibited the same superconductivity phenomenon as in Example 1. Tc at this time was 34.
また、金属粉体として、ＣｕとＡｌの粉体、或は、Ａｇ
とＡｌの粉体を混合して塗料にしても、焼成された複合
材は同じ超伝導現象を示した。また、ｐｂやＳｎのよう
な低融点金属の塗料を作製して、焼成に用いても同様の
効果が得られた。In addition, as metal powder, Cu and Al powder or Ag
Even when powders of Al and Al were mixed to form a paint, the fired composite exhibited the same superconductivity phenomenon. Furthermore, the same effect was obtained even when a paint made of a low melting point metal such as PB or Sn was prepared and used for firing.
〔実施例４〕
市販のＡｇ塗料（ＤＵＰＯＮＴ ４９２９）に（Ｙｏ、
５Ｂａｏ、 ５）ＣａＯ２粉体を混合させ複合塗料と
して、実施例１と同じ様に焼成して、複合材を作製した
。この試料においても９８ Ｋで超伝導現象を示し、実
施例１と同じ挙動が観測された。[Example 4] Commercially available Ag paint (DUPONT 4929) was coated with (Yo,
5Bao, 5) CaO2 powder was mixed to prepare a composite coating material, which was fired in the same manner as in Example 1 to produce a composite material. This sample also exhibited a superconducting phenomenon at 98 K, and the same behavior as in Example 1 was observed.
（発明の効果）
以上説明したように、金属系塗布材に、酸化物超伝導体
の粉体を分散させた混合体を、塗布し、それを焼成する
のであるから、溶剤とバインダは蒸発し、分散した金属
粉体粒子は酸化物粉体粒子を取り込みながら相互拡散を
伴い凝縮し、金属結合を形成するため、焼成された複合
材は機械的に強靭となる。焼成の際、酸化物粒子は相互
に接近し、かつ、酸化物粒子の接触界面には金属が介在
するため、酸化物粒子は固定され、酸化物粒子相互の接
触抵抗は減少して、Ｔｃ以下の残留抵抗が小さな、安定
した超伝導現象を示す材料となる。また、この複合材は
、塗布と焼成により形成できるため、任意の形状が容易
に形成できる利点がある。(Effects of the Invention) As explained above, since a mixture in which oxide superconductor powder is dispersed is applied to a metal-based coating material and then baked, the solvent and binder are not evaporated. The dispersed metal powder particles condense while taking in the oxide powder particles through interdiffusion to form a metallic bond, so that the fired composite material becomes mechanically strong. During firing, the oxide particles come close to each other and metal is present at the contact interface of the oxide particles, so the oxide particles are fixed and the contact resistance between the oxide particles decreases to below Tc. It is a material that exhibits stable superconducting phenomena with a small residual resistance. Furthermore, since this composite material can be formed by coating and firing, it has the advantage that any shape can be easily formed.
第１図は、金属材、本発明の超伝導性複合材及び酸化物
超伝導体の電気抵抗の温度依存性を示す。
１はＡｇ塗料のみを焼成したＡｇ材の抵抗変化であり、
２は本発明の超伝導性複合材の抵抗変化であり、３は酸
化物超伝導体の抵抗変化である。FIG. 1 shows the temperature dependence of the electrical resistance of a metal material, a superconducting composite material of the present invention, and an oxide superconductor. 1 is the resistance change of Ag material made by firing only Ag paint,
2 is the resistance change of the superconducting composite material of the present invention, and 3 is the resistance change of the oxide superconductor.
Claims (5)
る金属塗料に、酸化物超伝導体の粉末を混合させ、該混
合体を耐熱性基板に塗布した後、焼成することを特徴と
する超伝導性複合材の作製方法。(1) A superconductor characterized by mixing oxide superconductor powder with a metal coating consisting of metal or alloy powder, binder, and solvent, applying the mixture to a heat-resistant substrate, and then firing it. Method for making conductive composites.
ＸＭ２＿Ｘ）＿ＹＣｕＯ＿Ｚ（０＜Ｘ＜１、１≦Ｙ≦２
、２≦Ｚ≦４、Ｍ１はIII族金属（Ｓｃ、Ｙ、Ｌａ、Ｃ
ｅ、Ｐｒ、Ｎｄ、Ｐｍ、Ｙｂ、Ｌｕ、Ｂ、Ａｌ、Ｇａ、
Ｉｎ、Ｔｌ、Ｅｓ）、Ｍ２はII族金属（Ｂｅ、Ｍｇ、Ｃ
ａ、Ｓｒ、Ｂａ、Ｚｎ、Ｃｄ、Ｈｇ、Ｃｆ））の中から
選ばれた酸化物の粉末であることを特徴とする特許請求
の範囲第１項記載の超伝導性複合材の作製方法。(2) The above oxide superconductor powder is (M1_1_-_
XM2_X)_YCuO_Z(0<X<1, 1≦Y≦2
, 2≦Z≦4, M1 is a group III metal (Sc, Y, La, C
e, Pr, Nd, Pm, Yb, Lu, B, Al, Ga,
In, Tl, Es), M2 is a group II metal (Be, Mg, C
2. The method for producing a superconducting composite material according to claim 1, wherein the powder is an oxide selected from the group consisting of:
的再結晶温度の低い金属又はこれらの合金であることを
特徴とする特許請求の範囲第１項又は第２項記載の超伝
導性複合材の作製方法。(3) The superconductor according to claim 1 or 2, wherein the metal or alloy is a metal having a relatively low recrystallization temperature, such as Cu, Ag, or Al, or an alloy thereof. Method for producing composite materials.
クリル系、ゴム系等の高分子樹脂であり、溶剤としては
、バインダを常温で溶融する揮発性の高い有機溶剤を使
用することを特徴とする特許請求の範囲第１項、第２項
、第３項いずれか記載の超伝導性複合材の作製方法。(4) The binder is a polymeric resin such as epoxy, polyimide, acrylic, or rubber, and the solvent is a highly volatile organic solvent that melts the binder at room temperature. A method for producing a superconducting composite material according to any one of claims 1, 2, and 3.
融し、かつ、揮発性の高い有機溶剤であることを特徴と
する特許請求の範囲第１項、第２項、第３項いずれか記
載の超伝導性複合材の作製方法。(5) Any one of claims 1, 2, and 3, wherein the solvent is an organic solvent that melts a polymer dispersion material as a binder and is highly volatile. A method for producing the superconducting composite described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62072787A JP2527179B2 (en) | 1987-03-26 | 1987-03-26 | Method for producing superconducting composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62072787A JP2527179B2 (en) | 1987-03-26 | 1987-03-26 | Method for producing superconducting composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63237314A true JPS63237314A (en) | 1988-10-03 |
| JP2527179B2 JP2527179B2 (en) | 1996-08-21 |
Family
ID=13499447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62072787A Expired - Fee Related JP2527179B2 (en) | 1987-03-26 | 1987-03-26 | Method for producing superconducting composite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2527179B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0292385A2 (en) * | 1987-05-18 | 1988-11-23 | Sumitomo Electric Industries Limited | Method of making oxide ceramic superconducting wires |
| JPH01144518A (en) * | 1987-08-20 | 1989-06-06 | Sumitomo Electric Ind Ltd | Long-sized superconductor and manufacture thereof |
| US5834405A (en) * | 1990-05-18 | 1998-11-10 | International Business Machines Corporation | Superconducting multilayer ceramic substrate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63233070A (en) * | 1987-03-23 | 1988-09-28 | Semiconductor Energy Lab Co Ltd | Preparation of superconductive ceramic |
-
1987
- 1987-03-26 JP JP62072787A patent/JP2527179B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63233070A (en) * | 1987-03-23 | 1988-09-28 | Semiconductor Energy Lab Co Ltd | Preparation of superconductive ceramic |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0292385A2 (en) * | 1987-05-18 | 1988-11-23 | Sumitomo Electric Industries Limited | Method of making oxide ceramic superconducting wires |
| US5686394A (en) * | 1987-05-18 | 1997-11-11 | Sumitomo Electric Industries, Ltd. | Process for manufacturing a superconducting composite |
| JPH01144518A (en) * | 1987-08-20 | 1989-06-06 | Sumitomo Electric Ind Ltd | Long-sized superconductor and manufacture thereof |
| US5834405A (en) * | 1990-05-18 | 1998-11-10 | International Business Machines Corporation | Superconducting multilayer ceramic substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2527179B2 (en) | 1996-08-21 |
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