JPH01157452A - Fiber reinforced superconductor - Google Patents
Fiber reinforced superconductorInfo
- Publication number
- JPH01157452A JPH01157452A JP62314363A JP31436387A JPH01157452A JP H01157452 A JPH01157452 A JP H01157452A JP 62314363 A JP62314363 A JP 62314363A JP 31436387 A JP31436387 A JP 31436387A JP H01157452 A JPH01157452 A JP H01157452A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- oxide superconductor
- superconductor
- fine
- oxygen
- 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 58
- 239000000835 fiber Substances 0.000 title claims abstract description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 21
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 7
- 230000002950 deficient Effects 0.000 claims abstract description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 3
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims abstract description 3
- 230000007547 defect Effects 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract description 5
- 229910052727 yttrium Inorganic materials 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000010298 pulverizing process Methods 0.000 abstract description 2
- 239000012784 inorganic fiber Substances 0.000 abstract 1
- 125000004430 oxygen atom Chemical group O* 0.000 abstract 1
- 238000010304 firing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052693 Europium Inorganic materials 0.000 description 2
- 229910052689 Holmium Inorganic materials 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003721 gunpowder Substances 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052706 scandium Inorganic materials 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- 101100514056 Rhodobacter capsulatus modD gene Proteins 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000001947 vapour-phase growth 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】
［発明の目的］
（産業上の利用分野）
本発明は、酸化物超電導体に係り、特に機械的強度に優
れた酸化物超電導体に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an oxide superconductor, and particularly to an oxide superconductor having excellent mechanical strength.
（従来の技術）
近年、Ｂａ−Ｌａ−Ｃｕ−０系の層状ペロブスカイト型
の酸化物が高い臨界温度を有する可能性のあることが発
表されて以来、各所で酸化物超電導体の研究が行われて
いる（Ｚ、Ｐｈｙｓ、Ｂ Ｃｏｎｄｅｎｓｅｄ Ｍａｔ
ｔｅｒ６４、１８９−１９３（１９８６））。その中で
もｌ／−Ｂａ−Ｃｕ−０系で代表される酸素欠陥を有す
る欠陥ペロブスカイト型（ＬｎＢａ２Ｃｕ３Ｏ−ｔ−δ
型）（δハ酸素欠陥ヲ表ワＬ１通常１以下、Ｌｎは、Ｙ
、 Ｌａ、 Ｓｃ、 Ｎｄ、 Ｓｍ、 Ｅｕ１Ｇｄ。(Prior Art) In recent years, it has been announced that layered perovskite-type oxides based on Ba-La-Cu-0 may have a high critical temperature, and since then, research on oxide superconductors has been carried out in various places. (Z, Phys, B Condensed Mat
ter64, 189-193 (1986)). Among them, defective perovskite type (LnBa2Cu3O-t-δ
Type) (δ represents oxygen defects, L1 is usually less than 1, Ln is Y
, La, Sc, Nd, Sm, Eu1Gd.
Ｄｙ１Ｎｏ、［ｒ、 ｒｍ、 ｙｂ、ｉよび［Ｕから選
ばれた少なくとも１種の元素、Ｂａの一部はＳｒ￥？で
置換可能）の酸化物超電導体は、臨界温疫が９０に以上
と液体窒素以上の高い温度を示すため非常に有望な材料
として注目されティる（ Ｐｈｙｓ、 Ｒｅｖ、 Ｌｅ
ｔｔ、Ｖｏｌ、５８Ｎｏ、 ９．９０８−９１０）。Dy1No, at least one element selected from [r, rm, yb, i and [U, part of Ba is Sr\? Oxide superconductors (which can be replaced by
tt, Vol. 58 No. 9.908-910).
しかしながら、この酸化物超電導体は結晶性の酸化物で
あって機械的応力に対して弱く、一定値以上歪むと超電
導特性が低下または消滅する。このため、従来の酸化物
超電導体を用いた５！）電部材では、用途によっては実
用的な機械的強度、たとえば引張り強度や曲げ強度を得
ることが困難であり、使用時において所望の電流密度を
得ることが困難であるという問題があった。However, this oxide superconductor is a crystalline oxide and is weak against mechanical stress, and when it is distorted beyond a certain value, its superconducting properties deteriorate or disappear. For this reason, 5! using conventional oxide superconductors! ) In electrical components, it is difficult to obtain practical mechanical strength, such as tensile strength or bending strength, depending on the use, and it is difficult to obtain a desired current density during use.
（発明が解決しようとする問題点）
このように、従来の酸化物超電導体を用いた導電部材は
、用途によっては別械的強度が不充分であるという問題
があった。(Problems to be Solved by the Invention) As described above, the conventional conductive member using an oxide superconductor has a problem in that the mechanical strength is insufficient depending on the application.
本発明は、かかる従来の難点を解消すべくなされたもの
で、酸化物超電導体を用い、実用上充分な機械的強度を
有するｍＭ強化超電導体を提供することを目的としてい
る。The present invention was made to solve these conventional problems, and an object of the present invention is to provide an mM-strengthened superconductor using an oxide superconductor and having a mechanical strength sufficient for practical use.
［発明の構成］
（問題点を解決するための手段）
ザなわら、本発明の繊維強化超電導体は、酸化物超電′
導体中に、無機微繊維が分散されてなることを特徴とし
ている。[Structure of the Invention] (Means for Solving the Problems) The fiber-reinforced superconductor of the present invention is an oxide superconductor.
It is characterized by having inorganic fine fibers dispersed in the conductor.
本発明には各種の酸化物超電導体を用いることができる
が、臨界温度の高い、希土類元素含有のペロブスカイト
型の酸化物超電導体を用いた場合に特に実用的効果が大
きい。Although various oxide superconductors can be used in the present invention, the use of a perovskite-type oxide superconductor containing a rare earth element, which has a high critical temperature, has a particularly large practical effect.
上記の希土類元素を含有しペロブスカイト型構造を有す
る酸化物超電導体は、超電導状態を実現できるものであ
ればよく、ＬｎＢａ２Ｃｕ３Ｏ□−δ系（δは酸素欠陥
を表し通常１以下の数、［ｎは、Ｙ、Ｌａ、 Ｓｃ、
Ｎｄ、 Ｓｍ、 Ｅｕ、 Ｇｄ、 Ｄｙ、 Ｈｏ、 Ｅ
ｒ、 Ｔｍ、 ＹｂおよびＬｔ＋から選ばれた少なくと
も１種の元素、Ｂａの一部はＳｒ等で置換可能）等の酸
素欠陥を有する欠陥ペロブスカイト型、５ｒ−Ｌａ−Ｃ
ｕ−０系等の層状ペロブスカイト型等の広義にペロブス
カイト型を有する酸化物が例示される。また希土類元素
も広義の定義とし、Ｓｃ、 ＹおよびＬａ系を含むも
のとする。The above-mentioned oxide superconductor containing a rare earth element and having a perovskite structure may be one that can realize a superconducting state, and is based on LnBa2Cu3O□-δ (δ represents an oxygen defect and is usually a number of 1 or less, [n is ,Y,La,Sc,
Nd, Sm, Eu, Gd, Dy, Ho, E
5r-La-C
Examples include oxides having a perovskite type in a broad sense, such as a layered perovskite type such as u-0 type. Rare earth elements are also broadly defined to include Sc, Y, and La elements.
代表的な系としてＹ−Ｂａ−Ｃｕ−０系のほかに、Ｙを
Ｅｕ。In addition to the Y-Ba-Cu-0 system, Y is replaced by Eu as a typical system.
口■、Ｈｏ、 Ｅｒ、 Ｔｍ、 Ｙｂ、 Ｌｕ等の希土
類で置換した系、５ｃ−Ｂａ−Ｃｕ−０系、５ｒ−Ｌａ
−Ｃｕ−０系、ざらにＳｒをＢａ、 Ｃａで置換した系
等が挙げられる。*, Ho, Er, Tm, Yb, system substituted with rare earth elements such as Lu, 5c-Ba-Cu-0 system, 5r-La
Examples include -Cu-0 series, and systems in which Sr is roughly replaced with Ba or Ca.
本発明に用いる酸化物超電導体は、たとえば以下に示す
製造方法により得ることができる。The oxide superconductor used in the present invention can be obtained, for example, by the manufacturing method shown below.
まず、Ｙ、 Ｂａ５Ｃｕ等のべＯブス力イト型酸化物超
電導体の構成元素を充分混合する。混合の際には、Ｙ２
Ｏ３、ＣｕＯ等の酸化物を原料として用いることができ
る。また、これらの酸化物のほかに、焼成後酸化物に転
化する炭酸塩、硝酸塩、水酸化物等の化合物を用いても
よい。さらには、共沈法等で得たシュウ酸塩等を用いて
もよい。ペロブスカイト型酸化物超電導体を構成する元
素は、基本的に化学ｍ論比の組成となるように混合する
が、多少製造条件等との関係でずれていても差支えない
。たとえば、Ｙ−Ｂａ−Ｃｕ−０系ではＹ １ ｍｏｌ
に対しＢａ ２ ｍｏｌ、Ｃｕ ３ ｎｏｆが標準組成
であるが、実用上はＹ １ ｍｏｆに対して、Ｂａ ２
±０．６ ｍｏｌ、Ｃｕ ａ±０．２ ｍｏｌ程度のず
れは問題ない。First, the constituent elements of the beta-Obstone oxide superconductor, such as Y and Ba5Cu, are thoroughly mixed. When mixing, Y2
Oxides such as O3 and CuO can be used as raw materials. In addition to these oxides, compounds such as carbonates, nitrates, and hydroxides that are converted into oxides after firing may be used. Furthermore, oxalate obtained by a coprecipitation method or the like may be used. The elements constituting the perovskite-type oxide superconductor are basically mixed so as to have a composition in a stoichiometric ratio, but there is no problem even if the composition deviates slightly depending on the manufacturing conditions and the like. For example, in the Y-Ba-Cu-0 system, Y 1 mol
The standard composition is Ba 2 mol and Cu 3 nof for Y 1 mof, but in practice, Ba 2 mol and Cu 3 nof are used for Y 1 mof.
A deviation of approximately ±0.6 mol and Cu a ±0.2 mol is not a problem.
前述の原料を混合した後、仮焼、粉砕し所望の形状にし
た後、８５０〜９８０℃程度で焼成する。仮焼は必ずし
も必要ではない。仮焼および焼成は充分な酸素が供給で
きるような酸素含有雰囲気中で行うことが好ましい。所
望の形状に焼成した後、酸素含有雰囲気中で熱処理して
超電導特性を付与する。上記熱処理は、通常６００℃以
下で徐冷しながら行うようにする。After mixing the above-mentioned raw materials, they are calcined and pulverized into a desired shape, and then fired at about 850 to 980°C. Calcining is not necessarily necessary. Preferably, calcination and firing are performed in an oxygen-containing atmosphere where sufficient oxygen can be supplied. After firing into a desired shape, it is heat-treated in an oxygen-containing atmosphere to impart superconducting properties. The above heat treatment is usually performed at 600° C. or lower while slowly cooling.
このようにして得られた酸化物超電導体は、酸素欠陥δ
を有する酸素欠陥型ペロブスカイト構造（ＬｎＢａ
Ｃｕ Ｏ（δは通常１以下））となる。The oxide superconductor thus obtained has oxygen defects δ
Oxygen-deficient perovskite structure (LnBa
Cu O (δ is usually 1 or less)).
２３１−δ
なお、ＢａをＳｒ、 Ｃａの少なくとも１種で置換する
こともでき、ざらにＣＵの一部をＴｉ１Ｖ、 Ｃｒ１Ｈ
ｎ、 Ｆｅ。231-δ Note that Ba can also be replaced with at least one of Sr and Ca, and roughly a part of CU can be replaced with Ti1V, Cr1H
n, Fe.
Ｃ０１Ｎｉ、 Ｚｎ等で置換することもできる。It can also be replaced with C01Ni, Zn, etc.
この置換ωは、超電導特性を低下させない程度の範囲で
適宜設定可能であるが、あまりに多量の置換は超電導特
性を低下させてしまうので８０ｍｏｌＸ以下、さらに実
用上は２０１１１０１％以下程度までとする。This substitution ω can be set as appropriate within a range that does not reduce the superconducting properties, but too much substitution will reduce the superconducting properties, so it is set to 80 molX or less, and in practice, to about 2011101% or less.
本発明に用いる態別微繊維は、酸化物超電導体との熱膨
張差が小さく、かつ機械的強度に優れたセラミックス微
繊維であることが好ましい。このようなセラミックス微
繊維としては、アルミナ微ＩＩｉ維、炭化ケイ素微１１
１１ｔ、チタン酸カリウム微繊維、窒化ケイ素微繊維等
が挙げられる。これらのセラミックス微繊維は、ＣＶＤ
法、ＶＬＳ法および昇華再結晶法等の気相成長法や、溶
融原料からの紡糸法等により得ることができる。The classified fine fibers used in the present invention are preferably ceramic fine fibers that have a small difference in thermal expansion from the oxide superconductor and have excellent mechanical strength. Such ceramic fine fibers include alumina fine IIi fibers, silicon carbide fine 11
11t, potassium titanate fine fibers, silicon nitride fine fibers, and the like. These ceramic fine fibers are made by CVD
It can be obtained by a vapor phase growth method such as a method, a VLS method, a sublimation recrystallization method, a spinning method from a molten raw material, or the like.
本発明の繊維強化超電導体は、たとえば次のようにして
製造することができる。The fiber-reinforced superconductor of the present invention can be manufactured, for example, as follows.
まず、前述の酸化物超電導体をボールミル等の公知の手
段により粉砕して得た酸化物超電導体粉末９９〜８０体
積％と、無機微繊維１〜２０体Ｖ１％とを混合し、所望
の形状に予備成形した後、火薬や圧縮ガス等を利用して
！７５！加圧成形を施す。次いで、酸素含有雰囲気中８
５０〜９５０℃で焼成した後、酸素含有雰囲気中３Ｏ０
〜６００℃で酸素導入のための熱処理を行う。First, 99 to 80 volume % of oxide superconductor powder obtained by pulverizing the above-mentioned oxide superconductor by a known means such as a ball mill, and 1 to 20 V1% of inorganic fine fibers are mixed, and a desired shape is obtained. After preforming, use gunpowder or compressed gas! 75! Apply pressure molding. 8 in an oxygen-containing atmosphere.
After firing at 50-950℃, 3O0 in oxygen-containing atmosphere
Heat treatment for oxygen introduction is performed at ~600°C.
酸化物超電導体粉末と無機微ａｍとを混合するにあたっ
て、無機微繊維の割合いが１体積ｘ未満であると、実用
的な機械的強度を得ることができないので好ましくない
。一方、無機微繊維の割合いが２０体積％を超えると、
酸化物超電導体と反応する無機微ｉｌｌの量が増加して
超電導特性を低下させ過ぎるので好ましくない。When mixing the oxide superconductor powder and the inorganic fine am, it is not preferable that the proportion of the inorganic fine fiber is less than 1 volume x, since practical mechanical strength cannot be obtained. On the other hand, when the proportion of inorganic fine fibers exceeds 20% by volume,
This is not preferable because the amount of inorganic fine ill that reacts with the oxide superconductor increases, resulting in excessive deterioration of superconducting properties.
また、焼成時および酸素導入時の熱処理は、無機微繊維
が酸化物超電導体と反応して消滅してしまわないように
条件設定する。この条件設定は用いる酸化物超電導体お
よび無機微繊維の組成にもよるが、焼成時で概ね９００
℃２分〜３Ｏ分、酸素導入時で概ね５００℃１時間〜２
４時間である。Further, the heat treatment conditions during firing and oxygen introduction are set so that the inorganic fine fibers do not react with the oxide superconductor and disappear. Although this condition setting depends on the composition of the oxide superconductor and inorganic fine fiber used, it is approximately 900% when fired.
℃ 2 minutes to 30 minutes, approximately 500℃ when introducing oxygen 1 hour to 2
It is 4 hours.
（作 用）
本発明の繊維強化超電導体は、酸化物超電導体との熱膨
張差が小さくかつ機械的強度に優れた無機微ｌＩＮが酸
化物超電導体中に分散されているため、超ｆｆ１１体全
体の機械的強度が向上する。(Function) The fiber-reinforced superconductor of the present invention has a super FF11 structure because inorganic fine IN, which has a small difference in thermal expansion from the oxide superconductor and has excellent mechanical strength, is dispersed in the oxide superconductor. Overall mechanical strength is improved.
（実施例） 以下、本発明の実施例について説明する。(Example) Examples of the present invention will be described below.
実施例１
酸化物超電導体の原料として、Ｙ２Ｏ３粉末０．５ｍ０
１％、ＢａＣＯ３粉末２ｍｏ１％、 ＣｕＯ粉末３ｍＯ
１％を用い、これらを充分混合して大気中９００℃で８
時間焼成した後ボールミルを用いて粉砕して、平均粒径
２μｍの酸化物超電導体粉末とした。Example 1 Y2O3 powder 0.5m0 as raw material for oxide superconductor
1%, BaCO3 powder 2mo1%, CuO powder 3mO
1%, mix them thoroughly and heat them at 900℃ in the atmosphere for 8 hours.
After baking for a period of time, it was ground using a ball mill to obtain an oxide superconductor powder with an average particle size of 2 μm.
この酸化物超Ｔｉ導体粉末９０体積％とＳｉＣ微繊維１
０体ｇ１％とを充分混合し、１０×１０×２０ｉｌＩｌ
ｌに予備成形した後、火薬を用いたＶｆＪｓ加圧成形に
より１０４ｋ（Ｊｆ／ ｃｉの圧力を加えて、７ｘ ７
ｘ １５ｍｎ＋の成形物を得た。This oxide super Ti conductor powder 90% by volume and SiC fine fiber 1
0 body g1% and 10×10×20ilIl
After preforming to 7x7 by applying a pressure of 104k (Jf/ci) by VfJs pressure forming using gunpowder,
A molded product of x 15 mn+ was obtained.
得られた成形物を、酸素含有雰囲気中９００℃で１０分
焼成した後、酸素含有雰囲気中５００℃で１２時間熱処
理して酸化物超電導体の結晶構造中の酸素空席に酸素を
導入して繊維強化超電導体を１７だ。The obtained molded product was fired at 900°C for 10 minutes in an oxygen-containing atmosphere, and then heat-treated at 500°C for 12 hours in an oxygen-containing atmosphere to introduce oxygen into the oxygen vacancies in the crystal structure of the oxide superconductor, forming a fiber. The reinforced superconductor is 17.
このようにして得たｍ雑強化超電導体の臨界温度は８７
に１曲げ強度は１１ｋ（Ｊｆ／ｃｉであった。The critical temperature of the m miscellaneous reinforced superconductor obtained in this way is 87
The bending strength was 11k (Jf/ci).
なお、無機微繊維として＾１□０３を用いた場合でも、
同様の結果が得られた。Furthermore, even when ^1□03 is used as the inorganic fine fiber,
Similar results were obtained.
比較例
実施例と同様にして冑た酸化物超電導体粉末を用いて、
実施例と同様に予備成形、衝撃加圧成形、焼成および酸
素導入のための熱処理を施して、酸化物超電導体を得た
。Comparative Example Using oxide superconductor powder prepared in the same manner as in Example,
An oxide superconductor was obtained by performing preforming, impact molding, firing, and heat treatment for oxygen introduction in the same manner as in Examples.
この酸化物超電導体の臨界温度は９０Ｋ、曲げ強度は５
ｋＱｆ／ａ！であった。The critical temperature of this oxide superconductor is 90K, and the bending strength is 5
kQf/a! Met.
［発明の効果］
以上説明したように、本発明の、ｔＩＮ強化超電導体は
、従来の酸化物超電導体に比べて機械的強度に優れてい
る。[Effects of the Invention] As explained above, the tIN-reinforced superconductor of the present invention has superior mechanical strength compared to conventional oxide superconductors.
したがって、本発明によれば酸化物超電導体を用いた超
電導部材の用途を広げることが可能となる。Therefore, according to the present invention, it is possible to expand the uses of superconducting members using oxide superconductors.
さらに、本発明の繊維強化超電導体は衝撃加圧成形によ
り得られるため、酸化物超電導体結晶の緻密化も図られ
、これにより臨界電流密度も向上する。Furthermore, since the fiber-reinforced superconductor of the present invention is obtained by impact molding, the oxide superconductor crystal can be made denser, thereby improving the critical current density.
出願人 株式会社 東芝 代理人弁理士 須 山 佐 −Applicant: Toshiba Corporation Representative Patent Attorney Su Yamasa -
Claims (5)
ることを特徴とする繊維強化超電導体。(1) A fiber-reinforced superconductor characterized in that inorganic fine fibers are dispersed in an oxide superconductor.
維、チタン酸カリウム微繊維および窒化ケイ素微繊維の
少なくとも１種であることを特徴とする特許請求の範囲
第１項記載の繊維強化超電導体。(2) The fiber-reinforced superconductor according to claim 1, wherein the inorganic fine fibers are at least one of alumina fine fibers, silicon carbide fine fibers, potassium titanate fine fibers, and silicon nitride fine fibers. body.
スカイト型の酸化物超電導体であることを特徴とする特
許請求の範囲第１項または第２項記載の繊維強化超電導
体。(3) The fiber-reinforced superconductor according to claim 1 or 2, wherein the oxide superconductor is a perovskite-type oxide superconductor containing a rare earth element.
素から選ばれた少なくとも１種の元素）、ＢａおよびＣ
ｕを原子比で実質的に１：２：３の割合で含有すること
を特徴とする特許請求の範囲第１項ないし第３項のいず
れか１項記載の繊維強化超電導体。(4) The oxide superconductor contains Ln element (Ln is at least one element selected from rare earth elements), Ba and C
The fiber-reinforced superconductor according to any one of claims 1 to 3, characterized in that it contains u in an atomic ratio of substantially 1:2:3.
＿−＿δ（δは酸素欠陥を表わす）で表わされる酸素欠
陥型ペロブスカイト構造を有することを特徴とする特許
請求の範囲第１項ないし第４項のいずれか１項記載の繊
維強化超電導体。(5) The oxide superconductor is LnBa_2Cu_3O_7
The fiber-reinforced superconductor according to any one of claims 1 to 4, characterized in that it has an oxygen-deficient perovskite structure represented by _-_δ (δ represents an oxygen defect).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62314363A JPH01157452A (en) | 1987-12-11 | 1987-12-11 | Fiber reinforced superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62314363A JPH01157452A (en) | 1987-12-11 | 1987-12-11 | Fiber reinforced superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01157452A true JPH01157452A (en) | 1989-06-20 |
Family
ID=18052432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62314363A Pending JPH01157452A (en) | 1987-12-11 | 1987-12-11 | Fiber reinforced superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01157452A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003106373A1 (en) * | 2002-06-18 | 2003-12-24 | University Of Wollongong | Superconducting material and method of synthesis |
-
1987
- 1987-12-11 JP JP62314363A patent/JPH01157452A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003106373A1 (en) * | 2002-06-18 | 2003-12-24 | University Of Wollongong | Superconducting material and method of synthesis |
| US7838465B2 (en) | 2002-06-18 | 2010-11-23 | University Of Wollongong | Method of synthesis of a superconducting material |
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