JPH02137721A - Oxide superconductor and production thereof - Google Patents
Oxide superconductor and production thereofInfo
- Publication number
- JPH02137721A JPH02137721A JP63287604A JP28760488A JPH02137721A JP H02137721 A JPH02137721 A JP H02137721A JP 63287604 A JP63287604 A JP 63287604A JP 28760488 A JP28760488 A JP 28760488A JP H02137721 A JPH02137721 A JP H02137721A
- Authority
- JP
- Japan
- Prior art keywords
- oxide superconductor
- present
- superconductor
- oxide
- mixed powder
- 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
- 239000002887 superconductor Substances 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000011812 mixed powder Substances 0.000 claims abstract description 7
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 abstract description 2
- RSEIMSPAXMNYFJ-UHFFFAOYSA-N europium(III) oxide Inorganic materials O=[Eu]O[Eu]=O RSEIMSPAXMNYFJ-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract 2
- 238000001354 calcination Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 7
- 238000010304 firing Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910052684 Cerium Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052693 Europium Inorganic materials 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 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
- 239000000126 substance Substances 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 europium-cerium-barium-copper Chemical compound 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method 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
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は酸化物超伝導体に関するものである。[Detailed description of the invention] (Industrial application field) The present invention relates to oxide superconductors.
（問題点を解決するための手段）
本発明者は上記問題点を解決するために鋭意検討を行な
った結果、ユウロピウム−セリウム−バリウム−銅系の
酸化物が高い温度で超伝導状態を示すことを見出だし、
本発明を完成するに至った。(Means for Solving the Problems) As a result of intensive studies to solve the above problems, the inventors of the present invention found that europium-cerium-barium-copper-based oxides exhibit a superconducting state at high temperatures. Find out,
The present invention has now been completed.
すなわち本発明は、一般式
％式％
（ただし、０．５≦Ｘ≦０． ＆５゜
０．０５≦ｙ≦０．３５）
で示されることを特徴とする酸化物超伝導体及びその製
造方法である。That is, the present invention provides an oxide superconductor and a method for producing the same, which are represented by the general formula % (where 0.5≦X≦0. &5゜0.05≦y≦0.35). It is.
本発明の酸化物超伝導体は、ユウロピウム、セリウム、
バリウム及び銅の混合物を原料として酸化することによ
り製造することができるが、歩留まり、酸化時間などを
考慮すれば、ユウロピウム。The oxide superconductor of the present invention includes europium, cerium,
It can be manufactured by oxidizing a mixture of barium and copper as a raw material, but considering the yield and oxidation time, europium.
セリウム、バリウム及び銅各々の酸化物、炭酸塩などの
混合物を原料とし、焼成による酸化を行ない製造するこ
とが好ましい。また、原料の純度は特に制限しないが、
不純物が少ないものを用いることが好ましい。It is preferable to use a mixture of oxides, carbonates, etc. of cerium, barium, and copper as raw materials, and to perform oxidation by firing. In addition, there are no particular restrictions on the purity of raw materials, but
It is preferable to use one containing few impurities.
例えば本発明の酸化物超伝導体は、Ｅｕ２Ｏ３゜ＣｅＯ
、ＢａＣＯ３およびＣｕＯから成る混合粉末を原料とし
て、焼成による酸化を行なえば得ることかできる。上記
混合粉末を原料として用いる場合、混合粉末を温度８０
０℃以上で焼成することにより、ユウロピウム、セリウ
ム、バリウム及び銅は充分に酸化されて焼結体となり、
更に該焼結体は組織調整が為され、高い温度で超伝導状
態を示す本発明の酸化物超伝導体が得られる。このとき
焼成を空気中あるいは酸素中で、温度８００℃以上、時
間５時間以上で行なえば、原料は充分に酸化されるので
好ましい。For example, the oxide superconductor of the present invention is Eu2O3°CeO
It can be obtained by oxidizing a mixed powder consisting of , BaCO3 and CuO as a raw material by firing. When using the above mixed powder as a raw material, the mixed powder is heated to 80°C.
By firing at 0°C or higher, europium, cerium, barium and copper are sufficiently oxidized and become a sintered body.
Further, the structure of the sintered body is adjusted to obtain the oxide superconductor of the present invention which exhibits a superconducting state at high temperatures. At this time, it is preferable to carry out the firing in air or oxygen at a temperature of 800° C. or more for a time of 5 hours or more, since the raw material will be sufficiently oxidized.
以上のように得られた本発明の酸化物超伝導体は、３０
に以上の温度で超伝導状態を示すものである。The oxide superconductor of the present invention obtained as described above has 30
It exhibits a superconducting state at temperatures above .
（実施例）
以下、実施例により本発明を更に詳しく説明するが、本
発明は何らこれらに限定されるものではないゆ
実施例
原料として、純度９９．９９％のＢ ａ ＣＯａ粉末１
．００重量部、 Ｅ Ｌｌ ２０ ａ粉末２．８７ｆ
ｆ１１部、ＣｅＯ２粉末０．５８重量部およびＣｕＯ粉
末０．９８重量部を充分混合した混合粉末を用いた。(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.As an example raw material, B a COa powder 1 with a purity of 99.99%
．． 00 parts by weight, E Ll 20a powder 2.87f
A mixed powder was used in which 11 parts of f1, 0.58 parts by weight of CeO2 powder, and 0.98 parts by weight of CuO powder were thoroughly mixed.
その後、混合粉末を空気中、１１００℃で１０時間焼成
して焼結体を得た。得られた物質はＸ線回折による分析
の結果、
（Ｅｕ Ｂａ Ｃｅ０．０Ｂ
０．２０５ ０．１３５ ）２ ＣｕＯ４の組成を
有することが確認された。Thereafter, the mixed powder was fired in air at 1100° C. for 10 hours to obtain a sintered body. As a result of analysis by X-ray diffraction, the obtained substance was found to be (Eu Ba Ce0.0B
It was confirmed that it had a composition of 0.205 0.135 )2 CuO4.
また、得られた物質の電気抵抗を４端子法で測定した。Furthermore, the electrical resistance of the obtained substance was measured using a four-terminal method.
゛その結果、この物質は３０にと高い温度で超伝導状態
を示す超伝導体であることが［認された。温度による電
気抵抗の変化を２９６Ｋを基準として第１図に示す。As a result, this material was found to be a superconductor that exhibits superconductivity at temperatures as high as 30 degrees. FIG. 1 shows the change in electrical resistance due to temperature, with 296K as a reference.
また、得られた超伝導体の３０に以下での磁化率をａ−
１定したところ、完全反磁性を示し、このことから物質
全体が超伝導状態を示すことが確認された。その結果を
第２図に示す。In addition, the magnetic susceptibility of the obtained superconductor at 30% is set to a-
When the material was stabilized for 1 hour, it showed complete diamagnetism, which confirmed that the entire material exhibited a superconducting state. The results are shown in FIG.
（発明の効果）
以上述べたとおり、本発明の酸化物超伝導体は、３０に
以上の高い温度で超伝導状態を示すものであり、これを
用いることにより簡便に超伝導状態を１することができ
る。(Effects of the Invention) As described above, the oxide superconductor of the present invention exhibits a superconducting state at temperatures as high as 30°C or higher, and by using this, it is possible to easily bring the superconducting state to 1. Can be done.
第１図は実施例により得られた、本発明の酸化物超伝導
体の温度による電気抵抗の変化を示す図である。
第２図は実施例により得られた、本発明の酸化物超伝導
体の温度による磁化率の変化を示す図である。FIG. 1 is a diagram showing changes in electrical resistance depending on temperature of the oxide superconductor of the present invention obtained in Examples. FIG. 2 is a diagram showing changes in magnetic susceptibility depending on temperature of the oxide superconductor of the present invention obtained in Examples.
Claims (2)
ｕＯ＿４（ただし、０．５≦ｘ≦０．８５、 ０．０５≦ｙ≦０．３５） で示されることを特徴とする酸化物超伝導体。(1) General formula (Eu_xBa_yCe_1_-_x_-_y)_2C
An oxide superconductor characterized by uO_4 (0.5≦x≦0.85, 0.05≦y≦0.35).
ＣｕＯからなる混合粉末を温度８００℃以上で焼成する
ことを特徴とする特許請求の範囲第１項に記載の酸化物
超伝導体の製造方法。(2) The method for producing an oxide superconductor according to claim 1, characterized in that a mixed powder consisting of Eu_2O_3, CeO_2, BaCO_3, and CuO is fired at a temperature of 800°C or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63287604A JPH02137721A (en) | 1988-11-16 | 1988-11-16 | Oxide superconductor and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63287604A JPH02137721A (en) | 1988-11-16 | 1988-11-16 | Oxide superconductor and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02137721A true JPH02137721A (en) | 1990-05-28 |
Family
ID=17719423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63287604A Pending JPH02137721A (en) | 1988-11-16 | 1988-11-16 | Oxide superconductor and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02137721A (en) |
-
1988
- 1988-11-16 JP JP63287604A patent/JPH02137721A/en active Pending
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