JPS63225525A - Superconductive material - Google Patents
Superconductive materialInfo
- Publication number
- JPS63225525A JPS63225525A JP62057367A JP5736787A JPS63225525A JP S63225525 A JPS63225525 A JP S63225525A JP 62057367 A JP62057367 A JP 62057367A JP 5736787 A JP5736787 A JP 5736787A JP S63225525 A JPS63225525 A JP S63225525A
- Authority
- JP
- Japan
- Prior art keywords
- oxides
- bao
- expressed
- superconductive material
- superconducting material
- 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
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/80—Constructional details
- H10N60/85—Superconducting active materials
- H10N60/855—Ceramic superconductors
- H10N60/857—Ceramic superconductors comprising copper oxide
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
（産業上の利用分野）
本発明は、新しい超伝導性材料に関するものである。
（従来の技術〉
ある温度以下で電気抵抗がゼロになる超伝導物質は、磁
気浮上列車や医療用の断層診断装置、将来のエネルギー
源と目される核融合などに不可欠な強力磁石、送電損失
の少ない電力輸送用電線や電力貯蔵用の電源、高速コン
ピュータ素子用電極など暢広い応用が期待されている。
しかし、従来の材料は、超伝導体となる臨界温度（Ｔｃ
）が高々２３にと低かったため、冷却のため高価なヘリ
ウムを使わなければならないという欠点があった。
このような欠点を除くため、最近Ｌｍ−Ｈａ−Ｃｕ−０
からなる材料が開発され（Ｊ、Ｇ、Ｂｅｄｎｏｒｚ ａ
ｎｄに、Ａ、Ｍｕｌｌｅｒ、 Ｚ、、Ｐｈｙｓ、Ｂ、ｉ
Ｎ、１８９−１９３．１９８６）、それを受けて新たに
Ｖ−Ｂａ−Ｃｕ−０が開発された（Ｃ，ν、Ｃｈｕ他、
ｔｏ ｂｅｐｕｂｌｉｓｈｅｄ ｉｎ Ｐｈｙｓ、Ｒｅ
ｖ、Ｌｅｔｔ、）ａ Ｌ／かし、Ｌａ−Ｂａ−Ｃｕ、−
０は、Ｔｃが未だ３０−３５にと低く、轡た、Ｖ−Ｂａ
−Ｃｕ−０は、Ｔｃは９８にと高いものの、その材料合
成法が難しく、同じ合成条件によフて超伝導性を示すも
のと示さないものがあるなど、特性の再現性に難がある
という欠点があった。
（発明が解決しようとする問題点〉
本発明の目的は、上記の欠点を除くため、Ｔｃが高くか
つ合成が容易な新しい超伝導性材料を提供することにあ
る。
（問題点を解決するための手段）
本発明は、原料として酸化物、炭酸塩等を用い、焼成に
よりＮｄ−１１ａ−Ｃｕ−０からなる超伝導物 。
貢を得る。
（実施例）
〔実施例１］
Ｎｄ２Ｏ，、ＢａＣＯｘ、ＣｕＯを試薬として（１−ｘ
）：２ｘ：２（ここで、Ｏ＜ｘ＜１＞のモル比で焼成用
原料を秤量、混合後、９００°Ｃの温度において酸素中
ないし空気中で１２時閏燻、成してＮｄ・ｌ１ａ−Ｃｕ
−０１１化物を得た。
これらの酸化物は、ｒＩｉ数の相からなる混合物であり
、その一つとして、ＬａｌＢａ３Ｃｕ６０ｔ４． ｔ（
Ｌ、Ｅｒ−ＲａｋｈＯ他、 Ｊ、５ｏｌｉｄ ５ｔａｔ
ｅ Ｃｈｅａｐ、、 ３７，１５１−１５６．１９８１
）のようなペロブスカイト型化合物を含む、この酸化物
の抵抗率の温度変化を調べたところ、Ｘが０．３３（第
２図のｌで示した組成）から０．８２ （第２図の２で
示した組成）の範囲でＴｃが８０に以上の超伝導性を示
すことがわかった。そのＩＷ４として、Ｘが０．５の１
合を第１図に示す、第１図に示すようにこの物質は、Ｔ
ｃが９０にの超伝導性をもつ、これらの酸化物は、Ｔｃ
がｌｌｌｏＫ以上と高いため冷却に液体へ゛リウムより
価格が１０分の！安い液体窒素（沸点７７Ｋ）が使用で
きる可能性があり、また、合成法が単純で特性の再現性
に優れるという効果がある。
［実施例２］
Ｎｄ２Ｏ３、ＢａＣＯ３、ＣｕＯＪ＆試薬として（１−
ｘ）：３（＋−ｘ）：５ｘのモル比で焼成用原料を秤量
、混合後、９００°Ｃの温度において酸素中ないし空気
中で１２時間焼成してＮｄ−Ｂａ−Ｃｕ−０酸化物を得
た。これらの酸化物も実施例１に示した酸化物と同様、
複数の相からなる混合物であるが、これらの酸化物の抵
抗率の温度変化を調べたところ、Ｘが０．２９゛（第２
ｒ：Ｉｉの３で示した編成）から０．５８ （第２図の
４で示した組成）の範囲でＴｃがｌｌｌｏＫ以上の超伝
導性を示すことがわがフた。
［実Ｉ［３］
Ｎｄ２Ｏ３、ＢａＣＯ３、ＣｕＯを試薬として（１−Ｘ
）：２ｘ：２ｘのモル比で焼成用原料を秤量、混合後、
９００＃Ｃの温度においで酸素中ないし空気中で１２時
間焼成してＮｄ−Ｂａ−Ｃｕ・０酸化物な得た。これら
の酸化物も実施例１に示した酸化物と同様、複数の相か
らなる混合物であるが、これらの酸化物の抵抗率の温度
変化を調べたところ、Ｘが０．２５ （第２図の６で示
した組成）から０．８２ （第２１！ｌの６で示した組
成）の範囲でＴｃが８０に以上の超伝導性を示すことが
わかった。(Industrial Application Field) The present invention relates to a new superconducting material. (Conventional technology) Superconducting materials, whose electrical resistance becomes zero below a certain temperature, are used in powerful magnets and power transmission losses, which are essential for magnetic levitation trains, medical tomographic diagnostic equipment, and nuclear fusion, which is seen as a future energy source. It is expected that it will find a wide range of applications, such as electric wires for power transport with low thermal conductivity, power sources for power storage, and electrodes for high-speed computer devices.
) was as low as 23 at most, and had the disadvantage of requiring the use of expensive helium for cooling. In order to eliminate such drawbacks, recently Lm-Ha-Cu-0
A material consisting of (J, G, Bednorz a
nd, A., Muller, Z., Phys., B.i.
N, 189-193.1986), and in response, V-Ba-Cu-0 was newly developed (C, ν, Chu et al.
to be published in Phys, Re
v, Lett,) a L/Kashi, La-Ba-Cu, -
0, Tc is still low at 30-35, and V-Ba
-Cu-0 has a high Tc of 98, but its material synthesis method is difficult, and there are difficulties in reproducibility of its properties, with some exhibiting superconductivity and others not under the same synthesis conditions. There was a drawback. (Problems to be Solved by the Invention) An object of the present invention is to provide a new superconducting material that has a high Tc and is easy to synthesize, in order to eliminate the above-mentioned drawbacks. The present invention uses oxides, carbonates, etc. as raw materials, and obtains a superconductor composed of Nd-11a-Cu-0 by firing. (Example) [Example 1] Nd2O, BaCOx , CuO as a reagent (1-x
):2x:2 (Here, after weighing and mixing raw materials for firing with a molar ratio of O<x<1>, smoke them in oxygen or air at a temperature of 900°C for 12 hours to form Nd. l1a-Cu
-011 compound was obtained. These oxides are a mixture of rIi number of phases, one of which is LalBa3Cu60t4. t(
L, Er-RakhO et al., J, 5olid 5tat
e Cheap, 37, 151-156.1981
), we investigated the temperature change in resistivity of this oxide, which contains perovskite-type compounds such as It was found that superconductivity with a Tc of 80 or more was exhibited within the range of the composition shown in . As that IW4, X is 1 of 0.5
The combination is shown in Figure 1. As shown in Figure 1, this material
These oxides have superconductivity with c of 90, Tc
Since it is more expensive than lloK, it is 10 times cheaper than liquid helium for cooling! There is a possibility that cheap liquid nitrogen (boiling point 77K) can be used, and the synthesis method is simple and the reproducibility of characteristics is excellent. [Example 2] Nd2O3, BaCO3, CuOJ & (1-
Weigh and mix the raw materials for firing at a molar ratio of I got it. These oxides are similar to the oxides shown in Example 1,
Although it is a mixture consisting of multiple phases, when we investigated the temperature change in the resistivity of these oxides, we found that X was 0.29゛ (second phase).
It was found that Tc exhibits superconductivity of lloK or higher in the range of r:Ii (composition indicated by 3) to 0.58 (composition indicated by 4 in FIG. 2). [Real I [3] Nd2O3, BaCO3, CuO as reagents (1-X
): 2x: After weighing and mixing the raw materials for firing at a molar ratio of 2x,
A Nd--Ba--Cu.0 oxide was obtained by firing in oxygen or air at a temperature of 900 #C for 12 hours. Similar to the oxide shown in Example 1, these oxides are mixtures consisting of multiple phases, but when we investigated the temperature change in resistivity of these oxides, we found that X was 0.25 (Fig. 2). It was found that superconductivity with Tc of 80 or more was exhibited in the range from 0.82 (composition shown in 6 of No. 21!l) to 0.82 (composition shown in 6 of No. 21!l).
【実施例４】
Ｎｄ２Ｏ，、ＢａＣ０］、ＣｕＯを試薬として第２図の
１と４．４と２．２と６．６と３．３と５．５と１を結
んだ線で囲まれる領域の組成をもつ焼成用原料を秤量、
混合後、９０Ｇ’Ｃの温度において酸素中ないし空気中
で１２時間焼成して得た酸化物の抵抗率を調べたところ
、これらの酸化物もＴｃが８０に以上の超伝導性をもつ
ことがわかった。
（発明の効果）
以上説明したようにＮｄ−８ａ−Ｃｕ・０酸化物は、Ｔ
ｃが８０に以上と高く、合成も容易で特性の再現性に優
れるため、超伝導材料として使用できる利点がある。[Example 4] Using Nd2O, BaC0] and CuO as reagents, the area surrounded by the line connecting 1, 4.4, 2.2, 6.6, 3.3, 5.5, and 1 in Fig. 2 Weigh the raw materials for firing with the composition of
After mixing, we investigated the resistivity of the oxides obtained by baking them in oxygen or air at a temperature of 90 G'C for 12 hours, and found that these oxides also had superconductivity with a Tc of 80 or higher. Understood. (Effect of the invention) As explained above, Nd-8a-Cu.0 oxide has T
It has a high c of 80 or more, is easy to synthesize, and has excellent reproducibility of properties, so it has the advantage of being usable as a superconducting material.
第１図は、Ｎｄ２Ｏ３：ＢａＣＯ３：ＣｕＯ＝０．５：
Ｉ：１（１４，３：２８．６：５７．１）の組成をもつ
焼成物の抵抗率の温度変化を示す図である。
第２図は、Ｎｄ２０３−ＢａＯ−ＣｕＯ３元系で超伝導
性を示す組成領域を示す図である。ここで、１．２．３
．４．５，６は、各々、Ｎｄ２Ｏ３：ＢａＯ：ＣｕＯ＝
２０：２０：８０．４．７：４２．９：５２．４．１
Ｂ、［ｉ：４９．６：３３．８．９．２：２７．５：６
３．３．４２．８：２８．６：２Ｂ、６．５．２：４７
．４：４７．４の組成を示す。
図面の浄書（内容に変更なし）
ヤ １ 父
Ｎ従Ｌ０３
峯２（支）Figure 1 shows Nd2O3:BaCO3:CuO=0.5:
FIG. 2 is a diagram showing a temperature change in resistivity of a fired product having a composition of I:1 (14,3:28.6:57.1). FIG. 2 is a diagram showing a compositional region exhibiting superconductivity in the Nd203-BaO-CuO ternary system. Here, 1.2.3
．． 4.5 and 6 are respectively Nd2O3:BaO:CuO=
20:20:80.4.7:42.9:52.4.1
B, [i:49.6:33.8.9.2:27.5:6
3.3.42.8:28.6:2B, 6.5.2:47
．． 4:47.4. Engraving of drawings (no changes in content) Ya 1 Father N subordinate L03 Mine 2 (branch)
Claims (5)
Ｏ＝（１−ｘ）：２ｘ：２からなる組成において、ｘが
０．３３から０．８２の範囲で規定される特許請求の範
囲１項記載の超伝導性物質。(2) Among the above substances, Nd_2O_3:BaO:Cu
The superconducting material according to claim 1, wherein x is defined in the range of 0.33 to 0.82 in a composition consisting of O=(1-x):2x:2.
Ｏ＝（１−ｘ）：３（１−ｘ）：５ｘからなる組成にお
いて、ｘが０．２９から０．５８の範囲で規定される特
許請求の範囲第１項記載の超伝導性物質。(3) Among the above substances, Nd_2O_3:BaO:Cu
The superconducting material according to claim 1, wherein x is defined in the range of 0.29 to 0.58 in a composition consisting of O=(1-x):3(1-x):5x.
Ｏ＝（１−ｘ）：２ｘ：２ｘからなる組成において、ｘ
が０．２５から０．８２の範囲で規定される特許請求の
範囲第１項記載の超伝導性物質。(4) Among the above substances, Nd_2O_3:BaO:Cu
In the composition consisting of O=(1-x):2x:2x, x
The superconducting material according to claim 1, wherein the superconducting material is defined in the range of 0.25 to 0.82.
Ｏ系でＮｄ＿２Ｏ＿３：ＢａＯ：ＣｕＯ＝２０：２０：
６０、９．２：２７．５：６３．３、４．７：４２．９
：５２．４、５．２：４７．４：４７．４、１６．６：
４９．６：３３．８、４２．８：２８．６：２８．６で
示される組成を結んだ領域の中にある組成をもつ特許請
求の範囲１項、第２項、第３項、第４項いずれか記載の
超伝導性物質。(5) Among the above substances, Nd_2O_3-BaO-Cu
In O system, Nd_2O_3:BaO:CuO=20:20:
60, 9.2:27.5:63.3, 4.7:42.9
:52.4, 5.2:47.4:47.4, 16.6:
49.6:33.8, 42.8:28.6:28.6 having a composition within the region connecting the compositions shown in Claims 1, 2, 3, and The superconducting substance according to any of Item 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62057367A JPS63225525A (en) | 1987-03-12 | 1987-03-12 | Superconductive material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62057367A JPS63225525A (en) | 1987-03-12 | 1987-03-12 | Superconductive material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63225525A true JPS63225525A (en) | 1988-09-20 |
Family
ID=13053618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62057367A Pending JPS63225525A (en) | 1987-03-12 | 1987-03-12 | Superconductive material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63225525A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07232917A (en) * | 1994-02-18 | 1995-09-05 | Kokusai Chodendo Sangyo Gijutsu Kenkyu Center | Oxide superconductor and manufacturing method thereof |
| EP1035592A2 (en) * | 1999-03-05 | 2000-09-13 | International Superconductivity Technology Center | Oxide superconductor and method for producing same |
| US6690567B1 (en) | 2002-09-26 | 2004-02-10 | Ceramphysics, Inc. | Capacitive energy storage device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02502903A (en) * | 1987-01-12 | 1990-09-13 | ユニヴァーシティ オヴ ヒューストン・ユニヴァーシティ パーク | Superconductivity in rectangular planar compound systems |
-
1987
- 1987-03-12 JP JP62057367A patent/JPS63225525A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02502903A (en) * | 1987-01-12 | 1990-09-13 | ユニヴァーシティ オヴ ヒューストン・ユニヴァーシティ パーク | Superconductivity in rectangular planar compound systems |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07232917A (en) * | 1994-02-18 | 1995-09-05 | Kokusai Chodendo Sangyo Gijutsu Kenkyu Center | Oxide superconductor and manufacturing method thereof |
| EP1035592A2 (en) * | 1999-03-05 | 2000-09-13 | International Superconductivity Technology Center | Oxide superconductor and method for producing same |
| EP1035592A3 (en) * | 1999-03-05 | 2004-12-01 | International Superconductivity Technology Center | Oxide superconductor and method for producing same |
| US6690567B1 (en) | 2002-09-26 | 2004-02-10 | Ceramphysics, Inc. | Capacitive energy storage device |
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