JPH01145366A - Oxide-based superconducting ceramics - Google Patents
Oxide-based superconducting ceramicsInfo
- Publication number
- JPH01145366A JPH01145366A JP87305284A JP30528487A JPH01145366A JP H01145366 A JPH01145366 A JP H01145366A JP 87305284 A JP87305284 A JP 87305284A JP 30528487 A JP30528487 A JP 30528487A JP H01145366 A JPH01145366 A JP H01145366A
- Authority
- JP
- Japan
- Prior art keywords
- earth metal
- critical temperature
- superconducting ceramics
- oxide
- rare earth
- 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 16
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 7
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 claims abstract description 4
- 239000001301 oxygen Substances 0.000 claims abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 4
- 150000001342 alkaline earth metals Chemical class 0.000 claims abstract 3
- 229910002480 Cu-O Inorganic materials 0.000 claims abstract 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 239000003446 ligand Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 3
- 229910052788 barium Inorganic materials 0.000 abstract description 2
- 229910052727 yttrium Inorganic materials 0.000 abstract description 2
- 150000002910 rare earth metals Chemical class 0.000 abstract 3
- 229910052688 Gadolinium Inorganic materials 0.000 abstract 1
- 229910052746 lanthanum Inorganic materials 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 229910052712 strontium Inorganic materials 0.000 abstract 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 6
- 239000011224 oxide ceramic Substances 0.000 description 6
- 230000005292 diamagnetic effect Effects 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 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
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
゛本発明は、ペロブスカイト型結晶構造を有する酸化物
超電導セラミックスに関する。Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to an oxide superconducting ceramic having a perovskite crystal structure.
（従来の技術）
最近、液体窒素温度程度或いはそれ以上の温度で超電導
状態を示す酸化物超電導セラミックスが注目されている
。これらの多くは、希土類元素を含有するペロブスカイ
ト型酸化物である。代表的には例えば、Ｙ（イツトリウ
ム）−Ｂａ（バリウム）−Ｃｕ（銅）系の酸化物超電導
セラミックスがある。(Prior Art) Recently, oxide superconducting ceramics that exhibit a superconducting state at temperatures around or higher than the temperature of liquid nitrogen have attracted attention. Many of these are perovskite-type oxides containing rare earth elements. A typical example is Y (yttrium)-Ba (barium)-Cu (copper)-based oxide superconducting ceramics.
しかしこれまでに発表されている高温超電導セラミック
スは、臨界温度Ｔｃが高々９５にである。However, the high temperature superconducting ceramics announced so far have a critical temperature Tc of 95 at most.
臨界温度がこれより高いものもまれに公表されているが
、それらは十分なマイスナー効果が確認されていなかっ
たり、或いは極めて特性が不安定で経時変化が大きい、
といった問題があった。今後、高温酸化物超電導セラミ
ックスを工業上実用化するためには、更に臨界温度が高
く、しかも特性の安定性と信頼性が高いものであること
が望まれる。Products with a critical temperature higher than this have been published on rare occasions, but in these cases sufficient Meissner effect has not been confirmed, or the properties are extremely unstable and change significantly over time.
There was such a problem. In order to put high-temperature oxide superconducting ceramics into industrial use in the future, it is desired that they have even higher critical temperatures and more stable and reliable characteristics.
（発明が解決しようとする問題点）
以上のように従来の酸化物超電導セラミックスは、未だ
臨界温度が十分に高いとは言えず、また特性も不安定で
あるという聞届があった。(Problems to be Solved by the Invention) As described above, it has been reported that the critical temperature of conventional oxide superconducting ceramics is not yet sufficiently high, and the characteristics are also unstable.
本発明は上記の点に鑑み、臨界温度が高く、且つ安定し
た特性を示す酸化物超電導セラミックスを提供すること
を目的とする。In view of the above points, an object of the present invention is to provide an oxide superconducting ceramic having a high critical temperature and exhibiting stable characteristics.
［発明の構成］
（問題点を解決するための手段）
本発明は、Ｃｕ＋◆イオンの配位子位置に酸素欠陥を有
するＡ−Ｂ−Ｃｕ−０系の酸化物超電導セラミックスに
おいて、Ａとして二種類以上の希土類元素を有し、且っ
Ｂとして二種類以上のアルカリ土類金属元素を有するこ
とを特徴とする。[Structure of the Invention] (Means for Solving the Problems) The present invention provides an A-B-Cu-0 based oxide superconducting ceramic having an oxygen defect at the ligand position of the Cu+◆ ion. It is characterized by having more than one type of rare earth element, and having two or more types of alkaline earth metal elements as B.
（作用）
本発明のようなセラミックス成分とすることにより、臨
界温度９５に以上が得られ、またその臨界温度付近でマ
イスナー効果が確認され、超電導特性の安定性も優れた
ものが得られる。(Function) By using the ceramic component of the present invention, a critical temperature of 95 or above can be obtained, the Meissner effect is confirmed near the critical temperature, and excellent stability of superconducting properties can be obtained.
（実施例） 以下、本発明のいくつかの実施例を具体的に説明する。(Example) Hereinafter, some embodiments of the present invention will be specifically described.
第１図は各実施例の酸化物セラミックスの磁化率特性を
測定した結果である。FIG. 1 shows the results of measuring the magnetic susceptibility characteristics of the oxide ceramics of each example.
実施例Ｉ
Ｇ ｄ、５Ｌ ａｏ、５Ｍ ｇｏ、５Ｂ ａｌ、５Ｃｕ
３０ 、の成分を有するセラミックス材料を、１０５０
℃の水素還元雰囲気中で５時間焼結し、その後空気中で
６００℃、３０分のアニールを施した。この酸化物セラ
ミックスは、Ｘ線回折の測定から、ペロブスカイト系の
結晶構造を有することが確認された。臨界温度はＴｃ−
９８にであった。第１図に示したように、この臨界温度
付近で反磁性を示している。Example I G d, 5L ao, 5M go, 5B al, 5Cu
A ceramic material having a composition of 1050
It was sintered for 5 hours in a hydrogen reducing atmosphere at 600° C. and then annealed in air at 600° C. for 30 minutes. This oxide ceramic was confirmed to have a perovskite crystal structure from X-ray diffraction measurements. The critical temperature is Tc-
It was in 1998. As shown in FIG. 1, it exhibits diamagnetic properties near this critical temperature.
特性の安定性も優れていることが確認された。It was confirmed that the stability of properties was also excellent.
実施例２
Ｎｄ Ｓｎ Ｂａ Ｓｒ ＣｕＯの成分を０．
５ ０．５ １．５ ０．５ ３ ６．５有するセラミ
ックス材料を、１０００℃の００２ガス雰囲気中で５時
間焼結し、その後空気中で５５０℃、３０分のアニール
を施した。アニール後、徐冷した。この酸化物セラミッ
クスは、臨界温度はＴｃ＝１１０にであった。この臨界
温度付近で反磁性を示した。特性の安定性も優れている
ことが確認された。Example 2 The components of Nd Sn Ba Sr CuO were reduced to 0.
5 0.5 1.5 0.5 3 6.5 was sintered in a 002 gas atmosphere at 1000°C for 5 hours, and then annealed in air at 550°C for 30 minutes. After annealing, it was slowly cooled. The critical temperature of this oxide ceramic was Tc=110. It exhibited diamagnetic properties near this critical temperature. It was confirmed that the stability of properties was also excellent.
実施例３
Ｙｂ Ｙ Ｂａ Ｍｇ ＣｕＯの成分を０．
５ ０．５ １．５ ０．５ ３ ６．５有するセラ
ミックス材料を、空気中で１０５０℃。Example 3 The components of Yb Y Ba Mg CuO were reduced to 0.
5 0.5 1.5 0.5 3 6.5 ceramic material at 1050°C in air.
５時間焼結し、その後３００℃、３０分のアニールを施
した。得られた酸化物セラミックスは、Ｘ線回折の結果
、ペロブスカイト構造を有することが確認された。臨界
温度はＴｃ−１０１にであった。この臨界温度付近で反
磁性を示した。特性の安定性も優れていることが確認さ
れた。It was sintered for 5 hours, and then annealed at 300°C for 30 minutes. As a result of X-ray diffraction, it was confirmed that the obtained oxide ceramic had a perovskite structure. The critical temperature was at Tc-101. It exhibited diamagnetic properties near this critical temperature. It was confirmed that the stability of properties was also excellent.
実施例４
Ｙｂ Ｓｃ Ｂａ Ｃｒ ＣｕＯの成分を有０
．５ ０．５ １．５ ０．５ ８ ７するセラミック
ス材料を、空気中で１１００℃。Example 4 Contains 0 components of Yb Sc Ba Cr CuO
．． 5 0.5 1.5 0.5 8 7 ceramic material in air at 1100°C.
５時間焼結し、その後２５０℃、１時間のアニールを施
した。得られた酸化物セラミックスは、Ｘ線回折の結果
、ペロブスカイト構造を有することが確認された。臨界
温度はＴｃ−９７にであった。It was sintered for 5 hours, and then annealed at 250°C for 1 hour. As a result of X-ray diffraction, it was confirmed that the obtained oxide ceramic had a perovskite structure. The critical temperature was at Tc-97.
この臨界温度付近で反磁性を示した。特性の安定性も優
れていることが確認された。It exhibited diamagnetic properties near this critical temperature. It was confirmed that the stability of properties was also excellent.
〔発明の効果］
以上のように本発明によれば、９５に以上の臨界温度を
示し、この臨界温度付近でマイスナー効果を示し、安定
した特性が得られる酸化物超電導セラミックスを提供す
ることができる。[Effects of the Invention] As described above, according to the present invention, it is possible to provide an oxide superconducting ceramic that exhibits a critical temperature of 95 or higher, exhibits the Meissner effect near this critical temperature, and has stable characteristics. .
第１図は、本発明の実施例の酸化物セラミックスの磁化
率特性を示す。
出願人代理人 弁理士 鈴江武彦FIG. 1 shows the magnetic susceptibility characteristics of the oxide ceramics of Examples of the present invention. Applicant's agent Patent attorney Takehiko Suzue
Claims (1)
Ａ−Ｂ−Ｃｕ−Ｏ系の酸化物超電導セラミックスにおい
て、Ａとして二種類以上の希土類元素を有し、且つＢと
して二種類以上のアルカリ土類金属を有することを特徴
とする酸化物超電導セラミックス。In A-B-Cu-O based oxide superconducting ceramics having oxygen defects at the ligand positions of Cu^+^+ ions, A contains two or more rare earth elements, and B contains two or more rare earth elements. An oxide superconducting ceramic characterized by containing an alkaline earth metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP87305284A JPH01145366A (en) | 1987-12-02 | 1987-12-02 | Oxide-based superconducting ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP87305284A JPH01145366A (en) | 1987-12-02 | 1987-12-02 | Oxide-based superconducting ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01145366A true JPH01145366A (en) | 1989-06-07 |
Family
ID=17943244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP87305284A Pending JPH01145366A (en) | 1987-12-02 | 1987-12-02 | Oxide-based superconducting ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01145366A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008204958A (en) * | 2008-05-07 | 2008-09-04 | Toshiba Corp | Oxide superconductor and its manufacturing method |
-
1987
- 1987-12-02 JP JP87305284A patent/JPH01145366A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008204958A (en) * | 2008-05-07 | 2008-09-04 | Toshiba Corp | Oxide superconductor and its manufacturing method |
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