JPS63230525A - Superconductive material - Google Patents
Superconductive materialInfo
- Publication number
- JPS63230525A JPS63230525A JP62063226A JP6322687A JPS63230525A JP S63230525 A JPS63230525 A JP S63230525A JP 62063226 A JP62063226 A JP 62063226A JP 6322687 A JP6322687 A JP 6322687A JP S63230525 A JPS63230525 A JP S63230525A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- superconductive
- crystal structure
- superconductive material
- composition
- 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
- 239000000463 material Substances 0.000 title claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000013078 crystal Substances 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 230000002950 deficient Effects 0.000 claims abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 4
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 4
- 239000002887 superconductor Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910052691 Erbium Inorganic materials 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- GDZCSZKVCXJXBN-UHFFFAOYSA-N [Cu]=O.[Ba].[Er] Chemical compound [Cu]=O.[Ba].[Er] GDZCSZKVCXJXBN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- -1 barium-yttrium-copper-oxygen oxide Chemical compound 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
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
【発明の詳細な説明】 イ６発明の目的 性素材に関するものである。[Detailed description of the invention] B6 Purpose of the invention It concerns sexual materials.
従来最高の臨界温度を有する超伝導物質として確認され
ているものは、一般式、
（Ｌａ□−ＸＭｘ）２ＣｕＯ４
但しＭ＝Ｂａ、Ｓｒ、Ｃａ
で表わされる酸化物で、その臨界温度Ｔｃ（転移開始温
度）は最高で４０にであり、液体水素（沸点２０．３Ｋ
）または液体ネオン（沸点２７．１Ｋ）の冷却下で使用
可能になっているものの、未だ液体窒素（沸点７７Ｋ）
で使用可部な水準には達していなかった。The superconducting material that has been confirmed to have the highest critical temperature is an oxide represented by the general formula (La□-XMx)2CuO4, where M=Ba, Sr, Ca. temperature) is up to 40°C, and liquid hydrogen (boiling point 20.3K)
) or liquid neon (boiling point 27.1K), but it is still possible to use liquid nitrogen (boiling point 77K)
However, it did not reach a usable level.
臨界温度が液体窒素温度（沸点７７Ｋ）を越す可能性の
ある物質として指摘されたのは、米国ヒユーストン大学
Ｃ，Ｗ、Ｃｈｕらのグループによるバリウム−イツトリ
ウム−銅−酸素系の酸化物（Ｐｈｙｓ。A barium-yttrium-copper-oxygen oxide (Phys.
Ｒｅｖ、 Ｌｅｔｔ、 Ｖｏｌ、５Ｂ、 Ｐ２Ｏ３−９
０９（１９８７））テ、電気抵抗が消滅する温度は９４
にと主張されている。Rev, Lett, Vol, 5B, P2O3-9
09 (1987)) Te, the temperature at which electrical resistance disappears is 94
It is claimed that
しかし作成されたものは幾つかの構造を有する混合物質
であり、超伝導を示す物質の組成式は同定されていない
。However, what was created was a mixed material with several structures, and the compositional formula of the material exhibiting superconductivity has not been identified.
発明が解決しようとする問題点
本発明は、従来知られている超伝導性素材とは異った新
しい物質で、安価な液体窒素温度よりも高い温度で電気
抵抗が消滅する超伝導性素材を提供することを目的とす
る。Problems to be Solved by the Invention The present invention uses a new superconducting material that is different from conventionally known superconducting materials, and whose electrical resistance disappears at temperatures higher than the temperature of inexpensive liquid nitrogen. The purpose is to provide.
口０発明の構成
問題点を解決するための手段
本発明に係る超伝導性素材は、一般式
％式％
なる組成物を主体とし、酸素欠損ペロブスカイト型結晶
構造を有することを特徴とする。Means for Solving the Constituent Problems of the Invention The superconducting material according to the present invention is mainly composed of a composition represented by the general formula %, and is characterized by having an oxygen-deficient perovskite crystal structure.
ここでＭはＥｒ（エルビウム）を主成分とする希土類金
属元素であり、Ｘは１〜３、ｙは０．５〜１．５．ｚは
θ〜３の範囲の数値であり、好ましくはＸは２程度、ｙ
は１程度である。Here, M is a rare earth metal element whose main component is Er (erbium), X is 1 to 3, and y is 0.5 to 1.5. z is a numerical value in the range of θ to 3, preferably X is about 2, and y
is about 1.
Ｃｕは大部分が２価の状態で存在し１Ｍがほぼ３価、Ｈ
ａが２価である結果、０の組成は約６゜５となるが、前
記組成物を結晶化する際の焼成温度や雰囲気次第でＣｕ
の一部が３価、の状態となったものが共存する場合もあ
り、その場合、総合的な０組成は６．５よりも若干高め
に表れるが１本発明においてはかかる場合を除外するも
のではない。Most of Cu exists in a divalent state, and 1M is almost trivalent, H
As a result of a being divalent, the composition of 0 is approximately 6°5, but depending on the firing temperature and atmosphere when crystallizing the composition, Cu
In some cases, a part of which is in a trivalent state coexists, and in that case, the overall 0 composition appears to be slightly higher than 6.5, but this invention excludes such cases. isn't it.
即ち、（Ｂａ２Ｅｒ）Ｃｕ３０，５ に近い組成物が大
部分を占めていればよい。That is, it is only necessary that the composition close to (Ba2Er)Cu30,5 occupies the majority.
酸素雰囲気下で高温焼成を行っても３価のＣｕの生成は
それほど大ではなく、通常１０％以下である。Even if high-temperature firing is performed in an oxygen atmosphere, the production of trivalent Cu is not so large, usually 10% or less.
またＭはＥｒを主体とするが、他の希土類金属を若干含
んでいてもよい。Further, although M is mainly composed of Er, it may contain a small amount of other rare earth metals.
本発明において「主体とし」と言うのは、前記組成物が
大部分を占めている状態を指し、結晶構造及び本発明の
目的の達成に悪影響を与えない限り、前記組成物以外の
組成物乃至金属が共存する場合を除外するものではない
。In the present invention, the term "mainly composed" refers to a state in which the above-mentioned composition occupies the majority, and as long as it does not adversely affect the crystal structure and the achievement of the object of the present invention, compositions other than the above-mentioned composition may not be used. This does not exclude cases where metals coexist.
１月
前記一般式の組成物を主体とし、酸素欠損ペロブスカイ
ト型結晶構造を有する素材は、液体窒素温度よりも高い
温度で超伝導転移を開始する。A material mainly composed of the composition of the above general formula and having an oxygen-deficient perovskite crystal structure starts superconducting transition at a temperature higher than the liquid nitrogen temperature.
以下、実施例により本発明を具体的に説明するが、本発
明はこれら実施例に限定されるものではない。EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to these Examples.
実施例１
前記一般式において、Ｘが１．５〜ｔ、ｇ、ｙが１．５
〜１．２のバリウム−エルビウム−銅−酸素系組成物を
調製した。Example 1 In the general formula, X is 1.5 to t, g and y are 1.5
A barium-erbium-copper-oxygen composition of ~1.2 was prepared.
計算量の試薬特級Ｅｒ２０ｓ 、ＢａＣＯ３及びＣｕＯ
の各粉末をエタノール中でメノウ乳鉢により混合、ルツ
ボに入れて９５０℃で５時間予備焼成し、炉から取り出
したのち再び粉砕し、約１０００ Ｋ ｇ ／ ｃ ｍ
２の圧力でプレスしてベレットとし、９５０℃の炉中
で５時間焼結した。Calculated reagent special grade Er20s, BaCO3 and CuO
The powders were mixed in ethanol in an agate mortar, placed in a crucible, pre-calcined at 950°C for 5 hours, taken out from the furnace, and ground again to yield approximately 1000 kg/cm
It was pressed into a pellet at a pressure of 2.2 and sintered in a furnace at 950° C. for 5 hours.
各焼結物は、Ｘ線回折により、酸素欠損ペロブスカイト
型結晶構造を有することことが認められた。It was confirmed by X-ray diffraction that each sintered product had an oxygen-deficient perovskite crystal structure.
各々について、超伝導転移開始温度Ｔｃ（磁化率ないし
電気抵抗率が超伝導転移を示し始める温度）及び転移温
度幅ΔＴｃ（磁化率ないし電気抵抗率が通常の値（Ｔｃ
近傍）から変化する時の変化率が９０％及び１０％にな
る時の温度間隔）を測定した結果を第１表に示す。For each, the superconducting transition starting temperature Tc (the temperature at which the magnetic susceptibility or electrical resistivity begins to show a superconducting transition) and the transition temperature width ΔTc (the temperature at which the magnetic susceptibility or electrical resistivity is the normal value (Tc)
Table 1 shows the results of measuring the temperature interval when the rate of change is 90% and 10% when changing from the vicinity).
第 １ 表 ハ０発明の効果 本発明の超伝導性素材は下記の利点を有する。Table 1 Effect of invention The superconducting material of the present invention has the following advantages.
■臨界温度が高く液体窒素による冷却が可能になったた
め、稀少で高価な冷却剤の使用を全く必要としない。■Since the critical temperature is high and cooling with liquid nitrogen is possible, there is no need to use rare and expensive coolants.
■空気中で９５０℃程度の高温まで加熱しても安定であ
るために、超伝導線材やエレクトロニクス素子素材とし
ての製造上の自由度が大きい。■Since it is stable even when heated to a high temperature of about 950°C in air, it has great flexibility in manufacturing as a superconducting wire or electronic device material.
■セラミックス系の超伝導体であるために、その電気的
、磁気的、機械的性質が従来の金属系超伝導体と異なる
と考えられ、そのためにジョセフソン素子や超伝導量子
干渉素子として応用された時に、それらの特性の多様性
を増す。■Since it is a ceramic-based superconductor, its electrical, magnetic, and mechanical properties are thought to be different from conventional metal-based superconductors, and for this reason it has been applied as Josephson devices and superconducting quantum interference devices. increase the diversity of those characteristics.
Claims (1)
ｒを主成分とする希土類金属 ｘ＝１〜３ ｙ＝０．５〜１．５ ｚ＝０〜３ なる組成物を主体とし、酸素欠損ペロブスカイト型結晶
構造を有することを特徴とする超伝導性素材。[Claims] General formula (Ba_xM_y)Cu_3O_9_-_zwhere M=E
A superconductor characterized by having an oxygen-deficient perovskite crystal structure, which is mainly composed of a rare earth metal containing r as the main component, x = 1 to 3, y = 0.5 to 1.5, and z = 0 to 3. material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62063226A JPS63230525A (en) | 1987-03-18 | 1987-03-18 | Superconductive material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62063226A JPS63230525A (en) | 1987-03-18 | 1987-03-18 | Superconductive material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63230525A true JPS63230525A (en) | 1988-09-27 |
Family
ID=13223083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62063226A Pending JPS63230525A (en) | 1987-03-18 | 1987-03-18 | Superconductive material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63230525A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63236712A (en) * | 1987-03-24 | 1988-10-03 | Kazuo Fueki | Superconductive material |
| JPS643055A (en) * | 1987-03-22 | 1989-01-06 | Sumitomo Electric Ind Ltd | Production of superconducting material |
-
1987
- 1987-03-18 JP JP62063226A patent/JPS63230525A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643055A (en) * | 1987-03-22 | 1989-01-06 | Sumitomo Electric Ind Ltd | Production of superconducting material |
| JPS63236712A (en) * | 1987-03-24 | 1988-10-03 | Kazuo Fueki | Superconductive material |
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