JPH01111768A - Production of high temperature superconducting oxide - Google Patents
Production of high temperature superconducting oxideInfo
- Publication number
- JPH01111768A JPH01111768A JP62271270A JP27127087A JPH01111768A JP H01111768 A JPH01111768 A JP H01111768A JP 62271270 A JP62271270 A JP 62271270A JP 27127087 A JP27127087 A JP 27127087A JP H01111768 A JPH01111768 A JP H01111768A
- Authority
- JP
- Japan
- Prior art keywords
- provisionally
- calcined
- production
- oxide
- cuo
- 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 17
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000007858 starting material Substances 0.000 claims abstract description 8
- 229910052747 lanthanoid Inorganic materials 0.000 claims abstract description 6
- 150000002602 lanthanoids Chemical class 0.000 claims abstract description 6
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 5
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 5
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 4
- 239000002887 superconductor Substances 0.000 claims 1
- 238000001354 calcination Methods 0.000 abstract description 9
- 238000010298 pulverizing process Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 abstract description 4
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052771 Terbium Inorganic materials 0.000 abstract description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-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】
〈産業上の利用分野〉
本発明は、高温で超伝導現象を示す高温超伝導酸化物の
製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for producing a high-temperature superconducting oxide that exhibits a superconducting phenomenon at high temperatures.
・ 〈従来技術〉
高温超伝導材料はバルク材として送電ケーブル、リニア
モーターカー、磁気浮上船、電力貯蔵等に、または、薄
膜としてジョセフソン素子、スクイラド、磁気センサ等
の広い用途に期待されている。・ <Prior art> High-temperature superconducting materials are expected to be used as bulk materials in power transmission cables, linear motor cars, magnetically levitated ships, power storage, etc., and as thin films for a wide range of applications such as Josephson devices, Squirads, magnetic sensors, etc. .
この高温超伝導材料として、Ｂａ２ Ａｔ Ｃｕ３０７
−ｙ［ただしＡは、Ｙ又はＣｅ、Ｐｒ、Ｐｍ。As this high temperature superconducting material, Ba2 At Cu307
-y [where A is Y, Ce, Pr, or Pm.
Ｔｂを除くランタンド元素のうちいずれか一種］は、Ｉ
ＢＭ研究所等から提案され、高温で超伝導現象を示す酸
化物として脚光を浴びている。Any one of the lanthanide elements except Tb] is I
It was proposed by BM Research Institute and others, and has been attracting attention as an oxide that exhibits superconductivity at high temperatures.
例えば一般式Ｂ ａ２ ＹＩＣｕ３０７−ｙで表示され
る高温超伝導材料の製造にあっては、従来、出発原料と
して、ＢａＣＯ３、Ｙ２Ｏ３、ＣｕＯを用い、これを混
同し、仮焼、粉砕及び焼成することにより生成していた
。For example, in the production of a high-temperature superconducting material represented by the general formula B a2 YICu307-y, BaCO3, Y2O3, and CuO are conventionally used as starting materials, mixed together, and then calcined, pulverized, and fired. It was generated by
詳しくは、第２図に示すように、前記各材料を混合して
、９００℃で１０〜２４時間仮焼し、さらに粉砕してか
ら再び仮焼し、この粉砕と仮焼を数回祿換えしてＢａＣ
Ｏ３中の炭素を除去し、粉砕後９００℃〜１０００℃で
数時間焼成し、その後、アニールを施し、４００℃〜５
００℃で急冷することによりおこなっていた。Specifically, as shown in Figure 2, the above-mentioned materials are mixed, calcined at 900°C for 10 to 24 hours, further crushed and calcined again, and this crushing and calcining are repeated several times. And BaC
Carbon in O3 is removed, and after pulverization, it is fired at 900°C to 1000°C for several hours, then annealed and heated at 400°C to 50°C.
This was done by rapid cooling at 00°C.
〈発明が解決しようとする問題点〉
前記製造方法にあっては、出発原料として、ＢａＣＯ３
を用いているため、粉砕と仮焼を成度繰返して炭素Ｃを
除去する必要があり、しかも、仮焼温度が高いため、仮
焼したものは極めて固く、粉砕が困難であり、製造が面
倒であった。また、粉砕に用いる乳鉢、ポットのアルミ
ナ等が粉砕中に混入する恐れがあり、かつ仮焼反応が不
充分であると、ＢａＣＯ３が焼成物中に残留するため、
安定した酸化物を得ることができず再現性を阻害する一
因となっていた。さらには、焼結性が悪く、相対密度（
理論密度を６．４とする）が７０％〜８５％のものが製
造され、その緻密化が課題となっていた。<Problems to be solved by the invention> In the above production method, BaCO3 is used as a starting material.
Because of this, it is necessary to repeat grinding and calcination to remove carbon C. Furthermore, because the calcination temperature is high, the calcined product is extremely hard and difficult to grind, making manufacturing cumbersome. Met. In addition, there is a risk that alumina from the mortar and pot used for pulverization may be mixed in during pulverization, and if the calcination reaction is insufficient, BaCO3 will remain in the fired product.
It was not possible to obtain a stable oxide, which was one of the reasons for inhibiting reproducibility. Furthermore, the sinterability is poor and the relative density (
Products with a theoretical density of 6.4) of 70% to 85% have been manufactured, and densification has been an issue.
本発明はＢａ２Ａｔ Ｃｕ３０７−ｙ ［ただしＡは、
Ｙ又はＣｅ ＋ Ｐ ｒ 、 Ｐ ｍ 、 Ｔ ｂを除
くランク、ンド元素のうちいずれか一種］の製造にあっ
て、前記従来方法の問題点を解決することを目的とする
ものである。The present invention is based on Ba2AtCu307-y [where A is
The purpose of the present invention is to solve the problems of the conventional methods in the production of Y or any one of the rank and index elements excluding Ce + P r , P m , and T b.
く問題点を解決する手段〉
本発明は、
Ｂａ （ＯＨ）２ ＊ ８Ｈ２０゜Ａ２０３［た
だしＡは、Ｙ又はＣｅ、Ｐｒ。Means for Solving Problems〉 The present invention provides Ba(OH)2*8H20°A203 [where A is Y, Ce, or Pr.
Ｐｍ、Ｔｂを除くランタンド元素の
うちいずれか一種］
ＣｕＯ又はＣｕ２Ｏ
以上三種の材料を出発原料として混合し、仮焼、粉砕及
び焼成してＢａ２ Ａ＋ Ｃｕ３０７−ｙを生成するよ
うにしたことを特徴とするものである。Any one of the lanthanide elements excluding Pm and Tb] CuO or Cu2O The above three materials are mixed as starting materials, and are calcined, pulverized and fired to produce Ba2 A+ Cu307-y. It is something to do.
〈実施例〉
第１図に示すように、出発原料として、Ｂａ（ＯＨ）２
＊ ８Ｈ２０、Ｙ２０３ 、Ｃｕｏを所定量秤量し、
エチルアルコールを添加して混合粉砕し、５００℃〜７
００℃で１０時間仮焼し、これにエチルアルコールを添
加して粉砕した。そして、これを９００℃〜１０００℃
で５時間焼成し、その後、２５℃／時間の割合で徐冷し
、４００℃〜４５０℃で急冷しテＢａ２ ＹＩ Ｃｕ３
０７−ｙを得た。<Example> As shown in Fig. 1, Ba(OH)2 was used as a starting material.
*Weigh a predetermined amount of 8H20, Y203, and Cuo,
Add ethyl alcohol and mix and grind at 500℃~7
The mixture was calcined at 00° C. for 10 hours, and ethyl alcohol was added thereto and pulverized. Then, heat this to 900℃~1000℃
After that, it was slowly cooled at a rate of 25°C/hour, and then rapidly cooled at 400°C to 450°C.
07-y was obtained.
前記工程において、ＣｕＯに換えて、Ｃｕ２Ｏを用いる
ようにしてもよい。In the step, Cu2O may be used instead of CuO.
かかる工程によって生じたＢａ２ ｙｔ Ｃｕ３０７−
ｙは、相対密度が９０％〜９６％であり、緻密なものを
得ることができた。Ba2 yt Cu307- produced by this process
y had a relative density of 90% to 96%, and a dense product could be obtained.
また常伝導域での比抵抗も大幅に低下した。Moreover, the specific resistance in the normal conduction range was also significantly reduced.
尚、本発明はＢａ−Ｙ−Ｃｕ−０系を例にとって説明し
たが、Ｂａ−Ｍ−Ｃｕ−０系″［ただしＭは、Ｃｅ 、
Ｐ ｒ 、 Ｐ ｍ 、 Ｔ ｂを除くランタンド元
素のうちいずれか一種］の場合でも同様の効果を呈する
ことを確認した。The present invention has been explained using the Ba-Y-Cu-0 system as an example, but the Ba-M-Cu-0 system'' [where M is Ce,
It was confirmed that the same effect is exhibited even when using any one of the lanthanide elements excluding P r , P m , and T b.
く効果〉
本発明の製造方法にあって、その製造過程で出発原料と
して炭酸塩を用いないから、仮焼物中に炭素Ｃが混在せ
ず、このため、粉砕と仮焼を繰返す必要がなく、さらに
は低温で仮焼するため仮焼物の硬度が低く、易粉砕性が
あって、製造が容易である。Effects> Since the manufacturing method of the present invention does not use carbonate as a starting material in the manufacturing process, carbon C is not mixed in the calcined product, so there is no need to repeat crushing and calcining. Furthermore, since the calcined product is calcined at a low temperature, the calcined product has low hardness and is easily crushed, making it easy to manufacture.
またこの製造方法の結果生成されたＢａ２ＡＩＣｕ３０
７−ｙ［ただしＡは、Ｙ又はＣｅ 、 Ｐｒ 。Also, Ba2AICu30 produced as a result of this manufacturing method
7-y [where A is Y or Ce, Pr.
Ｐｍ、Ｔｂを除くランタンド元素のうちいずれか一種］
は、低温で仮焼したために、相対密度が高く、緻密な材
料を形成し得る。この緻密化は、Ｂａ２ Ａ＋ Ｃｕ３
０７−ｙの臨界温度Ｊｃの向上には必要であり、より高
い臨界温度Ｊｃの達成が期待される。Any one of the lanthanide elements excluding Pm and Tb]
can form dense materials with high relative density due to low temperature calcination. This densification is Ba2 A+ Cu3
This is necessary to improve the critical temperature Jc of 07-y, and it is expected to achieve a higher critical temperature Jc.
さらにまた材料が水、二酸化炭素に対する特性の劣化が
少なく、対環境性が向上する。Furthermore, the material has less deterioration in its properties against water and carbon dioxide, and its environmental resistance is improved.
その他、常伝導域での比抵抗も大幅に低下する。In addition, the specific resistance in the normal conduction range is also significantly reduced.
而て、本発明は極めて有益な製造方法である。Therefore, the present invention is an extremely useful manufacturing method.
【図面の簡単な説明】
第１図は本発明による製造工程を示す説明図、第２図は
従来の製造方法による製造工程を示す説明図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a manufacturing process according to the present invention, and FIG. 2 is an explanatory diagram showing a manufacturing process according to a conventional manufacturing method.
Claims (1)
Ｔｂを除くランタンド元素の うちいずれか一種］ ＣｕＯ又はＣｕ＿２Ｏ 以上三種の材料を出発原料として混合し、仮焼、粉砕及
び焼成してＢａ＿２ＡｌＣｕ＿３Ｏ＿７＿−＿ｙを生成
するようにしたことを特徴とする高温超伝導酸化物の製
造方法。[Claims] Ba(OH)_2・8H_2O, A_2O_3 [However, A is Y or Ce, Pr, Pm,
Any one of the lanthanide elements excluding Tb] CuO or Cu_2O A high-temperature superconductor characterized in that the above three materials are mixed as starting materials, and calcined, crushed and fired to produce Ba_2AlCu_3O_7_-_y. Method for producing oxides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62271270A JPH01111768A (en) | 1987-10-26 | 1987-10-26 | Production of high temperature superconducting oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62271270A JPH01111768A (en) | 1987-10-26 | 1987-10-26 | Production of high temperature superconducting oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01111768A true JPH01111768A (en) | 1989-04-28 |
Family
ID=17497744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62271270A Pending JPH01111768A (en) | 1987-10-26 | 1987-10-26 | Production of high temperature superconducting oxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01111768A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0264057A (en) * | 1988-08-29 | 1990-03-05 | Toshiba Corp | Oxide superconducting member |
| JPWO2015019992A1 (en) * | 2013-08-05 | 2017-03-02 | 学校法人同志社 | Boron carbide ceramics and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310764A (en) * | 1987-06-12 | 1988-12-19 | Mamoru Omori | Oriented oxide superconductor and its production |
-
1987
- 1987-10-26 JP JP62271270A patent/JPH01111768A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310764A (en) * | 1987-06-12 | 1988-12-19 | Mamoru Omori | Oriented oxide superconductor and its production |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0264057A (en) * | 1988-08-29 | 1990-03-05 | Toshiba Corp | Oxide superconducting member |
| JPWO2015019992A1 (en) * | 2013-08-05 | 2017-03-02 | 学校法人同志社 | Boron carbide ceramics and manufacturing method thereof |
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