JPS63236751A - Superconductive ceramic - Google Patents
Superconductive ceramicInfo
- Publication number
- JPS63236751A JPS63236751A JP62072485A JP7248587A JPS63236751A JP S63236751 A JPS63236751 A JP S63236751A JP 62072485 A JP62072485 A JP 62072485A JP 7248587 A JP7248587 A JP 7248587A JP S63236751 A JPS63236751 A JP S63236751A
- Authority
- JP
- Japan
- Prior art keywords
- compound
- oxide
- carbonate
- present
- superconductive ceramic
- 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 11
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 7
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 6
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 6
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 15
- 239000010955 niobium Substances 0.000 claims description 10
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical group [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- AAOVKJBEBIDNHE-UHFFFAOYSA-N diazepam Chemical compound N=1CC(=O)N(C)C2=CC=C(Cl)C=C2C=1C1=CC=CC=C1 AAOVKJBEBIDNHE-UHFFFAOYSA-N 0.000 claims description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 2
- 229940072690 valium Drugs 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 abstract description 12
- 239000000843 powder Substances 0.000 abstract description 8
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract description 5
- 238000010298 pulverizing process Methods 0.000 abstract description 4
- 238000001354 calcination Methods 0.000 abstract description 3
- 239000005751 Copper oxide Substances 0.000 abstract description 2
- 229910000431 copper oxide Inorganic materials 0.000 abstract description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 3
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 abstract 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 abstract 2
- 239000010949 copper Substances 0.000 abstract 1
- 229940116318 copper carbonate Drugs 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000007858 starting material Substances 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000002887 superconductor Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000005749 Copper compound Substances 0.000 description 2
- 229910052771 Terbium Inorganic materials 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 150000001880 copper compounds Chemical class 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- 239000011224 oxide ceramic Substances 0.000 description 2
- 229910052706 scandium Inorganic materials 0.000 description 2
- 239000013077 target material Substances 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910000750 Niobium-germanium Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910052727 yttrium 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
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】 「発明の利用分野」 本発明は酸化物セラミック系超電導材料に関する。[Detailed description of the invention] "Field of application of the invention" The present invention relates to oxide ceramic superconducting materials.
「従来の技術」 従来、超電導材料は、水銀、鉛等の元素、ＮｂＮ。"Conventional technology" Conventionally, superconducting materials include elements such as mercury and lead, and NbN.
Ｎｂ３Ｇｅ、 Ｎｂ３Ｇａ等の合金またはＮｂａ（八１
＠、 ５Ｇｅｏ、 ｚ）等の三元素化合物よりなる金
属材料が用いられている。しかしこれらのＴｃ（超電導
臨界温度）オンセントは２５Ｋまでであった。Alloys such as Nb3Ge, Nb3Ga or Nba(81
A metal material made of a ternary element compound such as @, 5Geo, z) is used. However, the Tc (superconducting critical temperature) of these was up to 25K.
他方、近年、セ・ラミック系の超電導材料が注目されて
いる。この材料は最初ＩＢＭのチューリッヒ研究所より
Ｂａ−Ｌａ−Ｃｕ−０（バラクオ）系酸化物高温超電導
体として報告され、さらにＬＳＣＯ（第二銅酸−ランタ
ンーストロンチューム）として知られてきた。On the other hand, ceramic-based superconducting materials have attracted attention in recent years. This material was first reported by IBM's Zurich Research Institute as a Ba-La-Cu-0 (baraquo) based oxide high temperature superconductor, and further came to be known as LSCO (cupric acid-lanthanum-strontium).
「従来の問題点」
しかし、これら酸化物セラミックスの超電導の可能性は
ベルブスカイト型の構造を利用しているもので、そのＴ
ｃも３０Ｋがその限界であった。``Conventional problems'' However, the possibility of superconductivity in these oxide ceramics is based on the vervskite structure, and its T
The limit for c was also 30K.
このため、このＴｃおよびＴｃｏをさらに高くし、望む
べくは液体窒素温度（７７Ｋ ）またはそれ以上で動作
せしめることが強く求められていた。For this reason, there has been a strong desire to further increase Tc and Tco, and preferably to operate at liquid nitrogen temperature (77K) or higher.
「問題を解決すべき手段」
本発明は、かかる高温で超電導を呈するべく、新しい素
材を探し求めた。その結果、Ｔｃも５０〜１０７Ｋにま
で向上させ得ることが明らかになった。"Means to Solve the Problem" The present invention seeks a new material that exhibits superconductivity at such high temperatures. As a result, it became clear that Tc could also be improved to 50 to 107K.
本発明の超電導性セラミックスは（ＡＩ−Ｘ Ｂｘ）ｙ
ｃｕｚｏｗＸ＝Ｏ〜１． ｙ−２，０〜４．０好ましく
は２．５〜３．５゜ｚ ＝１．０〜４．０好ましくは１
．５〜３．５．Ｗ＝４．０〜１０．０好ましくは７〜８
で一般的に示し得るものである。ＡはＧａ（ガリューム
）、Ｚｒ（ジルコニューム）。The superconducting ceramic of the present invention is (AI-X Bx)y
cuzowX=O~1. y-2,0-4.0 preferably 2.5-3.5°z = 1.0-4.0 preferably 1
．． 5-3.5. W=4.0-10.0 preferably 7-8
This can be generally shown as A is Ga (gallium) and Zr (zirconium).
Ｎｂにニオブ）またはＧｅ（ゲルマニューム）８ＢはＢ
ａ（バリューム）、Ｓｒ（ストロンチューム）またはＣ
ａ（カルシューム）より選ばれている。Nb to niobium) or Ge (germanium) 8B is B
a (valium), Sr (strontium) or C
It is selected from a (calcium).
本発明はさらにＡを一成分ではなく、前記した材料に加
えてイットリューム族（Ｅｕ、 Ｇｄ、 Ｔｂ、 Ｄｙ
、 Ｈｏ。The present invention further provides that A is not used as a single component, but as a component of the yttrium group (Eu, Gd, Tb, Dy) in addition to the above-mentioned materials.
, Ho.
Ｅｒｌ Ｔｍ、 ｙｂ、 Ｌｕ、 Ｓｃ、 Ｙ）を添加
する二成分構成を有せしめても有効である。It is also effective to have a two-component structure in which Erl Tm, yb, Lu, Sc, Y) is added.
本発明は出発材料の酸化物または炭酸化物を混合し、一
度加圧して仮焼成する。さらにこれを微粉末化し、再び
加圧しタブレット化し、本焼成をする工程を有せしめて
いる。In the present invention, starting materials of oxides or carbonates are mixed, pressurized once, and calcined. Furthermore, it has a step of pulverizing it, pressurizing it again to make it into a tablet, and then firing it.
「作用」
本発明のセラミック超電導素材はきわめて簡単に作るこ
とができる。特にこれらはその出発材料として３Ｎまた
は４Ｎの純度の酸化物を用い、これをボールミルを用い
微粉末に粉砕し、混合すれば化学量論的に（Ａｒ−ｘ
Ｂｘ）ｙｃｕｚｏｗのｘ＋ ３’ ＋ Ｚ ＨＨのそれ
ぞれの値を任意に変更、制御することができる。"Operation" The ceramic superconducting material of the present invention can be produced extremely easily. In particular, these use an oxide with a purity of 3N or 4N as its starting material, which is ground into a fine powder using a ball mill and mixed to achieve a stoichiometric (Ar-x
Each value of x+3'+ZHH of Bx)ycuzow can be arbitrarily changed and controlled.
本発明において゛、かかる超電導材料を作るのに特に高
価な設備を用いなくともよいという他の特徴も有する。Another feature of the present invention is that it is not necessary to use particularly expensive equipment to produce such a superconducting material.
以下に実施例に従い、本発明を記す。The present invention will be described below according to Examples.
「実施例１」
本発明の実施例としてＡとしてＮｂ、 ＢとしてＢａを
用いた。"Example 1" As an example of the present invention, Nb was used as A and Ba was used as B.
出発材料はＮｂ化合物として酸化ニオブ（Ｎｂ、Ｏ，）
。The starting material is niobium oxide (Nb, O,) as a Nb compound.
.
Ｂａ化合物としてＢａＣ０，、銅化合物としてＣｕＯを
用いた。これらは高純度化学工業株式会社より入手し純
度は９９．９５χまたはそれ以上の微粉末を用いた。BaCO was used as the Ba compound, and CuO was used as the copper compound. These were obtained from Kojundo Kagaku Kogyo Co., Ltd. and used as fine powders with a purity of 99.95χ or higher.
さらにｘ ＝０．６６（Ａ：Ｂ＝１：２）、 ’！ ＝
１． ｚ ＝３． ｗ ＝ ６〜８となるべく選んだ。Furthermore, x = 0.66 (A:B=1:2), '! =
1. z=3. W = 6 to 8 was chosen as much as possible.
・
これらを十分乳鉢で混合しカプセルに封入し、３ Ｋｇ
／ｃｍ”の荷重を加えてタブレフト化（大きさ１０ＩＩ
ＩＩＩＩφｘ３＋＋ｕｗ）した、さらに酸化性雰囲気、
例えば大気中で５００〜１０００℃、例えば７００℃で
８時間加熱酸化をした。この工程を仮焼成とした。・ Mix these thoroughly in a mortar and seal in capsules, weighing 3 kg.
/cm” load to create a table left (size 10II
IIIφx3++uw), further oxidizing atmosphere,
For example, heating oxidation was performed in the air at 500 to 1000°C, for example 700°C, for 8 hours. This step was called pre-firing.
次にこれを粉砕し、乳鉢で混合した。そしてその粉末の
平均粉半径が１０μｍ以下の大きさとなるようにした。This was then ground and mixed in a mortar. The powder was made to have an average powder radius of 10 μm or less.
さらにこれをカプセルに封入し５０Ｋｇ／ｃｍ”の圧力
でタブレットに加圧して成型した。Further, this was encapsulated in a capsule and pressed to form a tablet at a pressure of 50 kg/cm''.
またはこれと同時に、このタブレットを５００〜１００
０℃、例えば９００℃の酸化物雰囲気、例えば大気中で
酸化し、本焼成を１０〜５０時間、例えば１５時間行っ
た。Or at the same time, use this tablet for 500-100
Oxidation was carried out at 0°C, for example 900°C, in an oxide atmosphere, for example in the air, and main firing was carried out for 10 to 50 hours, for example 15 hours.
次にここの試料を酸素を少な（させた０、−Ａｒ中で加
熱（６００〜１１００℃、３〜３０時間、例えば８００
℃、２０時間）して、還元させた。Next, the sample was heated (600 to 1100°C, 3 to 30 hours, e.g. 800
°C for 20 hours) for reduction.
この試料を用いて固有抵抗と温度との関係を調べた。す
るとＴｃオンセット（超電導の始まる温度）として１０
３ Ｋ 、Ｔｃｏ（電気抵抗が実質的に零となる温度）
として？２ ” Ｋを観察することができた。Using this sample, the relationship between resistivity and temperature was investigated. Then, Tc onset (temperature at which superconductivity begins) is 10
3 K, Tco (temperature at which electrical resistance becomes substantially zero)
As? 2”K could be observed.
「実施例２」
この実施例としてＡとしてＺｒ、、ＢとしてＢａを用い
た。出発材料はＺｒＯを、ＢａとしてＢａＣＯ５、また
銅化合物としてＣｕＯを用いた。その他は実施例１と同
様である。"Example 2" In this example, Zr was used as A, and Ba was used as B. ZrO was used as the starting material, BaCO5 was used as Ba, and CuO was used as the copper compound. The rest is the same as in Example 1.
Ｔｃオンセットとして８０Ｋ ％ Ｔｃｏとして６３Ｋ
を得ることができた。80K as Tc onset 63K as Tco
was able to obtain.
「実施例３」
実施例１において、ＡとしてＮｂに加えてｙ、ｏ、を）
Ｊｂ、０．に２０〜３０％加えた。するとＴｃオンセッ
トをさらに５〜９にも向上させることができた。"Example 3" In Example 1, in addition to Nb, y, o, as A)
Jb, 0. 20-30% was added. As a result, the Tc onset could be further improved to 5-9.
本発明において、イットリューム族（Ｅｕ、Ｇａ、Ｔｂ
＋）ｙ、 Ｈｄ＋ Ｅｒ、 Ｔ＋ｓ、 Ｙｂｔ Ｌｕ、
Ｓｃ、 Ｖ）の元素を酸化物として出発材料として用
い、複合材料セラミックスとしても有効である。特にこ
れらより選ばれた材料をＣＡｒ−ｘ Ｂｘ）ｙｃｕｚｏ
ｗで示される一般式のＡの一部に和えることはＴｃを５
〜ＩＯＫも向上させる効果があった。In the present invention, the yttrium group (Eu, Ga, Tb
+)y, Hd+ Er, T+s, Ybt Lu,
Using the elements Sc, V) as oxides as starting materials, it is also effective as a composite ceramic material. Especially materials selected from these are CAr-x Bx)ycuzo
Adding it to a part of A in the general formula w indicates that Tc is 5
- It also had the effect of improving IOK.
「実施例４」
本実施例として、実施例３の変型であるが、イットリュ
ーム族の元素、例えばｙｂを酸化物で添加した。しかし
これらはＲ１（Ｓ０４）・ＫｚＳＯａ （Ｒはイットリ
ニーム元素）型の複塩として過剰の硫酸カリニーム溶液
にとかし、これを実施例１で用いた仮焼成後の粉末に添
加して添加効果を向上させる方法もその添加量を精密に
制御できる。その結果、実施例１に比べてさらに最大８
にもＴｃを向上できた。"Example 4" This example is a modification of Example 3, but an element of the yttrium group, for example, yb, was added in the form of an oxide. However, these are dissolved as double salts of the R1 (S04) KzSOa (R is yttrine element) type in an excess potassium sulfate solution, and this is added to the pre-calcined powder used in Example 1 to improve the addition effect. The method also allows precise control of the amount added. As a result, compared to Example 1, the maximum
It was also possible to improve Tc.
「実施例５」
本発明はその他の材料としてＡとしてＧａ、Ｇｅ、 Ｂ
としてＳｒを用い得る。その概要は実施例１と概略同様
である。"Example 5" The present invention uses Ga, Ge, and B as other materials A.
Sr can be used as the material. The outline is roughly the same as that of the first embodiment.
「効果」
本発明はこれまでまったく不可能とされているセラミッ
ク超電導体を作ることができるようになった。"Effects" The present invention has made it possible to create ceramic superconductors, which was previously considered impossible.
本発明において仮焼成をした後に微粉末化する工程によ
り、初期状態でのそれぞれの出発材料の化合物を到達材
料、即ち（Ａ、ＸＢｘ）ｙｃｕｚｏ−で示される材料を
含む化合物とするものである。In the present invention, the step of calcining and then pulverization converts the compound of each starting material in its initial state into the final material, that is, a compound containing the material represented by (A, XBx)ycuzo-.
さらにこの到達材料の化合物を再び微粉末化することに
より、−皮形成された到達材料を含む化合物中に混入し
た。出発材料の化合物をより完全に除去する効果を有し
、加えて最後完成化合物中にボイド等の空穴の有る完成
化合物中に、ボイド等の空穴の存在をより除去すること
ができるものと推定される。Furthermore, by pulverizing the compound of this target material again, it was mixed into the compound containing the coated target material. It has the effect of removing the compound of the starting material more completely, and in addition, it can further remove the presence of vacancies such as voids in the final completed compound that has vacancies such as voids. Presumed.
また本発明の分子式で示される超電導セラミックスはそ
の超電導の推定メカニズムとして、銅の酸化物が構造に
おいて層構造を有し、その層構造も一分子内で一層また
は２層構成を有し、その層内をキャリアが超電導をして
いるものと推定さざ゛れる。。In addition, the superconducting ceramic represented by the molecular formula of the present invention has a layered structure of copper oxide as a presumed mechanism of superconductivity, and the layered structure also has a one-layer or two-layer structure within one molecule. It is presumed that the carriers inside are superconducting. .
本発明の実施例は、タブレットにしたものである。しか
しタブレットにするのではなく、仮焼成または本焼成の
後の粉末を溶媒にとかし、基板等にその溶液をコーティ
ングをし、これを酸化性雰囲気で焼成し、さらにその後
還元性雰囲気で本焼成をすることによって、薄膜の超電
導セラミックスとすることも可能である。An embodiment of the present invention is made into a tablet. However, instead of making tablets, the powder after preliminary firing or main firing is dissolved in a solvent, the solution is coated on a substrate, etc., and this is fired in an oxidizing atmosphere, and then the main firing is performed in a reducing atmosphere. By doing so, it is also possible to form a thin film of superconducting ceramics.
本発明により超電導体を容易に低価格で作ることができ
るようになった。The present invention has made it possible to easily produce superconductors at low cost.
Claims (2)
＝０〜１，ｙ＝２．０〜４．０，ｚ＝１．０〜４．０，
ｗ＝４．０〜１０．０を有し、ＡがＧａ（ガリューム）
，Ｚｒ（ジルコニューム），Ｎｂ（ニオブ）またはＧｅ
（ゲルマニューム）より選ばれ、ＢはＢａ（バリューム
），Ｓｒ（ストロンチューム），Ｃａ（カルシューム）
より選ばれた超電導性を有するセラミックス材料である
ことを特徴とする超電導セラミックス。1. (A_1_-_xB_x)_yCu_zO_w_x
=0~1, y=2.0~4.0, z=1.0~4.0,
w=4.0 to 10.0, A is Ga (gallium)
, Zr (zirconium), Nb (niobium) or Ge
(Germanium), B is Ba (Valium), Sr (Strontium), Ca (Calcium)
A superconducting ceramic characterized by being a ceramic material having superconductivity selected from the following.
ーム），Ｚｒ（ジルコニューム），Ｎｂ（ニオブ）また
はＧｅ（ゲルマニューム）より選ばれた材料とイットリ
ューム族の元素との複数の元素より選ばれた材料との複
合体であることを特徴とする超電導セラミックス。2. In claim 1, A is selected from a plurality of elements including a material selected from Ga (gallium), Zr (zirconium), Nb (niobium), or Ge (germanium) and an element of the yttrium group. Superconducting ceramics are characterized by being composites with other materials.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62072485A JPS63236751A (en) | 1987-03-25 | 1987-03-25 | Superconductive ceramic |
| AU13171/88A AU598115B2 (en) | 1987-03-18 | 1988-03-16 | Superconducting oxide ceramics |
| EP88302429A EP0283317B1 (en) | 1987-03-18 | 1988-03-18 | Superconducting oxide ceramics |
| DE8888302429T DE3878270T2 (en) | 1987-03-18 | 1988-03-18 | SUPER-CONDUCTING OXIDE CERAMICS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62072485A JPS63236751A (en) | 1987-03-25 | 1987-03-25 | Superconductive ceramic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63236751A true JPS63236751A (en) | 1988-10-03 |
Family
ID=13490672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62072485A Pending JPS63236751A (en) | 1987-03-18 | 1987-03-25 | Superconductive ceramic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63236751A (en) |
-
1987
- 1987-03-25 JP JP62072485A patent/JPS63236751A/en active Pending
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