JPS63250877A - Superconducting member - Google Patents
Superconducting memberInfo
- Publication number
- JPS63250877A JPS63250877A JP62086316A JP8631687A JPS63250877A JP S63250877 A JPS63250877 A JP S63250877A JP 62086316 A JP62086316 A JP 62086316A JP 8631687 A JP8631687 A JP 8631687A JP S63250877 A JPS63250877 A JP S63250877A
- Authority
- JP
- Japan
- Prior art keywords
- ceramics
- superconductivity
- exhibit
- superconducting
- group
- 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.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 42
- 230000001747 exhibiting effect Effects 0.000 claims description 13
- 230000000737 periodic effect Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 239000004020 conductor Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 230000008646 thermal stress Effects 0.000 abstract description 4
- 230000003252 repetitive effect Effects 0.000 abstract 2
- 230000009466 transformation Effects 0.000 abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910052695 Americium Inorganic materials 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052685 Curium Inorganic materials 0.000 description 1
- 229910052690 Einsteinium Inorganic materials 0.000 description 1
- 229910052687 Fermium Inorganic materials 0.000 description 1
- 230000005668 Josephson effect Effects 0.000 description 1
- 229910052766 Lawrencium Inorganic materials 0.000 description 1
- 229910052764 Mendelevium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052781 Neptunium Inorganic materials 0.000 description 1
- 229910052778 Plutonium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052774 Proactinium Inorganic materials 0.000 description 1
- -1 R b Inorganic materials 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 229910052730 francium Inorganic materials 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 1
- 229910052705 radium Inorganic materials 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 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
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
- H10N60/0296—Processes for depositing or forming superconductor layers
- H10N60/0576—Processes for depositing or forming superconductor layers characterised by the substrate
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は、超電導性が必要とされるデバイス等に用い
られる超電導部材に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a superconducting member used in devices requiring superconductivity.
［従来の技術］
最近、セラミックス系超電導材料が高い超電導転移臨界
温度を示すことが見い出され、注目されている。これら
のセラミックス系超電導材料は、従来の金属系超電導材
料と同様、単独での使用とともに、超電導状態の安定化
等の目的で、常電導材料と複合して使用することが検討
されている。[Prior Art] Recently, it has been discovered that ceramic superconducting materials exhibit a high critical temperature for superconducting transition, and this has attracted attention. Similar to conventional metal-based superconducting materials, these ceramic-based superconducting materials are being considered for use alone or in combination with normal-conducting materials for the purpose of stabilizing the superconducting state.
従来の金属系超電導材料では、常電導材料として、銅や
アルミニウムなどの常電導金属が専ら使用されている。In conventional metallic superconducting materials, normal conducting metals such as copper and aluminum are exclusively used as normal conducting materials.
［発明が解決しようとする問題点〕
しかしながら、セラミックス系超電導材料に、常電導材
料として金属を複合させると、それぞれの熱膨張係数が
大きく異なるため、繰返し熱応力に弱い超電導部材とな
る。[Problems to be Solved by the Invention] However, when a ceramic superconducting material is combined with a metal as a normal conductive material, the thermal expansion coefficients of the materials differ greatly, resulting in a superconducting member that is susceptible to repeated thermal stress.
この発明の目的は、かかる問題を解消すべく、新規な超
電導部材を提供することにある。An object of the present invention is to provide a novel superconducting member to solve this problem.
［問題点を解決するための手段］
この発明の超電導部材では、超電導を示すセラミックス
と、該セラミックスが超電導を示す超電導転移臨界温度
以下の温度で常電導を示すセラミックスとを複合してい
る。[Means for Solving the Problems] The superconducting member of the present invention is a composite of a ceramic exhibiting superconductivity and a ceramic exhibiting normal conductivity at a temperature below the superconductivity transition critical temperature at which the ceramic exhibits superconductivity.
この発明で用いられる超電導を示すセラミックスとして
は、たとえば、一般式ＡａＢｂＣｃで表わされる超電導
材料［Ａは周期律表１ａ、ＵａおよびＩＩＩａ族元素か
らなる群より選択した少なくとも１種、Ｂは周期律表Ｉ
ｂ、ｎｂおよびｍｂ族元素からなる群より選択した少な
くとも１種、Ｃは酸素、炭素、窒素、フッ素およびイオ
ウからなる群より選択した少なくとも１種を示し、一般
式中のａ、 ｂおよびＣは、それぞれ、Ａ、Ｂおよび
Ｃの組成比を示す数である。コを挙げることができる。The ceramic exhibiting superconductivity used in the present invention includes, for example, a superconducting material represented by the general formula AaBbCc [A is at least one element selected from the group consisting of elements of group 1a, Ua, and IIIa of the periodic table, and B is I
At least one selected from the group consisting of group b, nb and mb group elements; C represents at least one selected from the group consisting of oxygen, carbon, nitrogen, fluorine and sulfur; a, b and C in the general formula are , are numbers indicating the composition ratios of A, B and C, respectively. I can list the following.
周期律表１ａ族元素としては、Ｈ，Ｌｉ、Ｎａ、に、Ｒ
ｂ、Ｃｓ、Ｆｒが挙げられる。周期律表ｎａ族元素とし
ては、Ｂｅ、 Ｍｇ、 Ｃａ、 Ｓｒ。Group 1a elements of the periodic table include H, Li, Na, R
b, Cs, and Fr. Group Na elements of the periodic table include Be, Mg, Ca, and Sr.
Ｂａ、Ｒａが挙げられる。周期律表ＩＩｒａ族元素とし
ては、Ｓｃ、Ｙ、Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｐｍ ｒ
Ｓ ｍ ＋ Ｅ ｕ ！ Ｇ ｄ ＋ Ｔ ｂ ＊ Ｄ
ｙ ｒ Ｈｏ ｒ Ｅ ｒ ＋Ｔｍ、 Ｙｂ、 Ｌｕ
、 Ａｃ、 Ｔｈ、 Ｐａ、 Ｕ、 Ｎｐ。Examples include Ba and Ra. Group IIra elements of the periodic table include Sc, Y, La, Ce, Pr, Nd, Pm r
S m + E u! G d + T b * D
y r Hor E r +Tm, Yb, Lu
, Ac, Th, Pa, U, Np.
Ｐｕ、 Ａｍ、 Ｃｍ、 Ｂｋ、 Ｃｆ、 Ｅｓ、
Ｆｍ、 Ｍｄ、Ｎｏ、Ｌｒが挙げられる。Pu, Am, Cm, Bk, Cf, Es,
Examples include Fm, Md, No, and Lr.
また、周期律表１ｂ族元索としては、Ｃｕ、Ａｇ、Ａｕ
が挙げられる。周期律表ｎｂ族元素としては、Ｚｎ、Ｃ
ｄ、Ｈｇが挙げられる。周期律表ｍｂ族元素としては、
Ｂ、 ＡＩ、 Ｇａ、 Ｉｎ、 ＴＩが挙げられる。In addition, as the elements of group 1b of the periodic table, Cu, Ag, Au
can be mentioned. Group nb elements of the periodic table include Zn, C
d, Hg. Group MB elements of the periodic table include:
Examples include B, AI, Ga, In, and TI.
特に好ましくは、Ａが周期律表１ａ、ＩｌａおよびＩＩ
Ｉａ族元素からなる群より選ばれた少なくとも２種を含
む。また、Ｂとして少なくとも銅を含み、Ｃとして少な
くとも酸素を含むことがさらに好ましい。Particularly preferably, A corresponds to periodic table Ia, Ila and II
Contains at least two selected from the group consisting of Group Ia elements. Further, it is more preferable that B contains at least copper, and C contains at least oxygen.
また、一般式中のａ、ｂおよびＣは、ａｘ（Ａの平均原
子価）＋ｂＸ （Ｂの平均原子価）ｍｃＸ（Ｃの平均原
子価）を満たすことが好ましい。Further, a, b and C in the general formula preferably satisfy ax (average valence of A) + bX (average valence of B) mcX (average valence of C).
なお、従来知られている超電導を示すセラミックスとし
ては、たとえばＹ−３ｒ＝Ｃｕ−０系セラミツクス、Ｙ
−Ｂａ−Ｃｕ−０系セラミツクス、Ｌａ−８ｒ−Ｃｕ−
０系セラミツクスおよびＬａ−Ｂａ−Ｃｕ−０系セラミ
ツクスがある。しかし、この発明は、これらの従来のセ
ラミックスに限定されることはなく、将来開発される超
電導を示すセラミックスをも対象とするものである。Note that conventionally known ceramics exhibiting superconductivity include, for example, Y-3r=Cu-0 ceramics, Y
-Ba-Cu-0 ceramics, La-8r-Cu-
There are 0 series ceramics and La-Ba-Cu-0 series ceramics. However, the present invention is not limited to these conventional ceramics, but also covers ceramics exhibiting superconductivity that will be developed in the future.
この発明で用いる常電導を示すセラミックスとしては、
超電導を示すセラミックスが、その超電導転移臨界温度
より高い温度となったときに示す電気抵抗よりも低い電
気抵抗を有するセラミックスであれば特に限定されるこ
とはない。たとえば、ＴｉＯ２などの酸化物が挙げられ
、またその他の炭化物、窒化物、フッ化物および硫化物
などのセラミックスを用いることができる。Ceramics exhibiting normal conductivity used in this invention include:
The ceramic exhibiting superconductivity is not particularly limited as long as it has an electrical resistance lower than the electrical resistance it exhibits when the temperature reaches a temperature higher than its superconducting transition critical temperature. For example, oxides such as TiO2 can be used, and other ceramics such as carbides, nitrides, fluorides, and sulfides can be used.
［発明の作用効果］
この発明の超電導部材では、セラミックス同士を複合し
ており、熱膨張率が比較的近似しているため、常電導材
料として金属を用いた場合に比べ繰返し熱応力に対し強
い超電導部材とすることができる。[Operations and Effects of the Invention] The superconducting member of the present invention is a composite of ceramics and has relatively similar coefficients of thermal expansion, so it is more resistant to repeated thermal stress than when metal is used as the normal conductive material. It can be a superconducting member.
また、超電導を示すセラミックスは一般に脆くて弱いも
のであるが、この発明の超電導部材では、このような超
電導を示すセラミックスに常電導を示すセラミックスを
複合させているので、常電導を示すセラミックスで超電
導を示すセラミックスを補強することができる。In addition, although ceramics that exhibit superconductivity are generally brittle and weak, the superconducting member of the present invention combines such ceramics that exhibit superconductivity with ceramics that exhibit normal conductivity, so that ceramics that exhibit normal conductivity can be used to conduct superconductivity. It can reinforce ceramics that show
この発明の超電導部材は、電気伝送媒体のみならず、ク
ライオスタットやジョセフソン効果などを利用するよう
な超電導が必要とされる分野において幅広く利用され得
るものである。したがって、常電導の部分を複合する目
的は、超電導安定化に限定されることはなく、たとえば
電極端子などその他の目的で複合させてもよい。The superconducting member of the present invention can be used not only as an electrical transmission medium but also in a wide range of fields where superconductivity is required, such as in cryostats, Josephson effects, and the like. Therefore, the purpose of combining normally conducting parts is not limited to stabilizing superconductivity, and may be combined for other purposes such as electrode terminals.
［実施例］
常電導を示すセラミックスであるＴｉＯ□基板の上に、
第１図に示すように、ＹＢａ２ Ｃｕ、０７の組成の膜
をスパッタリング法により形成した。[Example] On a TiO□ substrate, which is a ceramic exhibiting normal conductivity,
As shown in FIG. 1, a film having a composition of YBa2Cu, 07 was formed by sputtering.
第１図において、１は超電導を示すセラミックス薄膜で
あるＹＢａ２ Ｃｕ、０７膜、２は常電導を示すセラミ
ックス基板であるＴｉＯ２基板を示す。In FIG. 1, numeral 1 indicates a YBa2 Cu, 07 film which is a ceramic thin film exhibiting superconductivity, and 2 indicates a TiO2 substrate which is a ceramic substrate exhibiting normal conductivity.
薄膜の超電導転移臨界温度は９０にであった。また、Ｔ
ｉＯ２は、９０に以下でも常電導を示すことが知られて
いる。第１図に示す超電導部材の超電導特性を、７７に
で測定したところ、安定した超電導状態を示すことが確
認された。The superconducting transition critical temperature of the thin film was 90°C. Also, T
It is known that iO2 exhibits normal conductivity even at 90°C or less. When the superconducting properties of the superconducting member shown in FIG. 1 were measured at 77, it was confirmed that it exhibited a stable superconducting state.
第１図は、この発明の一実施例を示す断面図である。
図において、１は超電導を示すセラミックス薄膜、２は
常電導を示すセラミックス基板を示す。FIG. 1 is a sectional view showing an embodiment of the present invention. In the figure, 1 indicates a ceramic thin film exhibiting superconductivity, and 2 indicates a ceramic substrate exhibiting normal conductivity.
Claims (5)
超電導を示す超電導転移臨界温度以下の温度で常電導を
示すセラミックスとを複合したことを特徴とする、超電
導部材。(1) A superconducting member characterized in that it is a composite of a ceramic that exhibits superconductivity and a ceramic that exhibits normal conductivity at a temperature below the superconducting transition critical temperature at which the ceramic exhibits superconductivity.
ｂＣｃで表わされる超電導材料［Ａは周期律表 I ａ、
IIａおよびIIIａ族元素からなる群より選択した少なく
とも１種、Ｂは周期律表 I ｂ、IIｂおよびIIIｂ族元素
からなる群より選択した少なくとも１種、Ｃは酸素、炭
素、窒素、フッ素およびイオウからなる群より選択した
少なくとも１種を示し、一般式中のａ、ｂおよびｃは、
それぞれ、Ａ、ＢおよびＣの組成比を示す数である。］
である、特許請求の範囲第１項記載の超電導部材。(2) The ceramic exhibiting superconductivity has the general formula AaB
Superconducting material represented by bCc [A is periodic table I a,
At least one element selected from the group consisting of elements of groups IIa and IIIa, B is at least one element selected from the group consisting of elements of groups Ib, IIb and IIIb of the periodic table, and C is oxygen, carbon, nitrogen, fluorine and sulfur. represents at least one selected from the group consisting of: a, b and c in the general formula,
These numbers indicate the composition ratios of A, B, and C, respectively. ]
The superconducting member according to claim 1.
らなる群より選択した少なくとも２種を含むことを特徴
とする、特許請求の範囲第２項記載の超電導部材。(3) The superconducting member according to claim 2, wherein the A includes at least two selected from the group consisting of Groups Ia, IIa, and IIIa of the Periodic Table.
くとも酸素を含むことを特徴とする、特許請求の範囲第
２項または第３項記載の超電導部材。(4) The superconducting member according to claim 2 or 3, wherein the B contains at least copper, and the C contains at least oxygen.
均原子価）＋ｂ×（Ｂの平均原子価）＝ｃ×（Ｃの平均
原子価）を満たすように選ばれることを特徴とする、特
許請求の範囲第２、３または４項に記載の超電導部材。(5) a, b, and c in the general formula are selected such that a x (average valence of A) + b x (average valence of B) = c x (average valence of C) The superconducting member according to claim 2, 3 or 4, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62086316A JP2520901B2 (en) | 1987-04-08 | 1987-04-08 | Superconducting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62086316A JP2520901B2 (en) | 1987-04-08 | 1987-04-08 | Superconducting material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63250877A true JPS63250877A (en) | 1988-10-18 |
| JP2520901B2 JP2520901B2 (en) | 1996-07-31 |
Family
ID=13883429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62086316A Expired - Lifetime JP2520901B2 (en) | 1987-04-08 | 1987-04-08 | Superconducting material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520901B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63239742A (en) * | 1987-03-27 | 1988-10-05 | Matsushita Electric Ind Co Ltd | Manufacture for film superconductor |
-
1987
- 1987-04-08 JP JP62086316A patent/JP2520901B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63239742A (en) * | 1987-03-27 | 1988-10-05 | Matsushita Electric Ind Co Ltd | Manufacture for film superconductor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2520901B2 (en) | 1996-07-31 |
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