JPH026330A - Production of superconducting material and superconducting single crystal - Google Patents
Production of superconducting material and superconducting single crystalInfo
- Publication number
- JPH026330A JPH026330A JP25010488A JP25010488A JPH026330A JP H026330 A JPH026330 A JP H026330A JP 25010488 A JP25010488 A JP 25010488A JP 25010488 A JP25010488 A JP 25010488A JP H026330 A JPH026330 A JP H026330A
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- superconducting
- superconducting material
- carbonate
- crucible
- 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 27
- 239000013078 crystal Substances 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 7
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 13
- 239000002887 superconductor Substances 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- 239000005751 Copper oxide Substances 0.000 claims description 6
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000431 copper oxide Inorganic materials 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- WKMKTIVRRLOHAJ-UHFFFAOYSA-N oxygen(2-);thallium(1+) Chemical compound [O-2].[Tl+].[Tl+] WKMKTIVRRLOHAJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910003438 thallium oxide Inorganic materials 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 5
- 230000008025 crystallization Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 2
- 239000012768 molten material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 7
- 239000000155 melt Substances 0.000 abstract description 6
- 229910052716 thallium Inorganic materials 0.000 abstract description 6
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011575 calcium Substances 0.000 abstract description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052791 calcium Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052788 barium Inorganic materials 0.000 abstract description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract description 3
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000000859 sublimation Methods 0.000 abstract description 3
- 230000008022 sublimation Effects 0.000 abstract description 3
- 229910008649 Tl2O3 Inorganic materials 0.000 abstract 2
- 230000003647 oxidation Effects 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 2
- QTQRFJQXXUPYDI-UHFFFAOYSA-N oxo(oxothallanyloxy)thallane Chemical compound O=[Tl]O[Tl]=O QTQRFJQXXUPYDI-UHFFFAOYSA-N 0.000 abstract 2
- 229910002480 Cu-O Inorganic materials 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 101100404599 Caenorhabditis elegans nfi-1 gene Proteins 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は１００Ｋ近傍で超電導状態に入るタリウム系の
超電導材料及び超電導体単結晶の製造力１去に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to thallium-based superconducting materials that enter a superconducting state at around 100 K, and to the production capacity of superconducting single crystals.
（ロ）従来の技術
昭和６３年２月２９日から３月４日にかけてスイスのイ
ンターラーケンで開催されたＭｉ電導国際学会で、ＩＢ
Ｍのアルマーデン研究所のＰ・グランド博士がタリウム
、カルシウム、バリウム、銅の酸化物が１１８にで超電
導状態になることを発表した。(b) Conventional technology IB
Dr. P. Grand of the Almaden Institute of M.A. announced that oxides of thallium, calcium, barium, and copper become superconducting at 118 degrees.
また、本発明者らによる論文［５ｐｕｔｔｅｒｅｄ
Ｔｌ−Ｃａ−Ｂａ−Ｔｌ−Ｃａ−Ｂａ−Ｃｕ−０Ｔｈｉ
ｎＦｉ１゜Ｒｅ５ｉｓｔｉｖｉｔｙ ａ〔９８ＫＥ
（Ｊａｐａｎｅｓｅ ＪｏｕｒｎａｌｏＩ Ａｐ
ｐｌｉｅｄ Ｐｈｙｓｉｃｓ、 Ｖｏｌ、２７．＼０
．５．＼ｌａｙ。In addition, a paper by the present inventors [5 puttered
Tl-Ca-Ba-Tl-Ca-Ba-Cu-0Thi
nFi1゜Re5istivity a〔98KE
(Japanese Journal I Ap
plied Physics, Vol. 27. \0
．． 5. \lay.
］！１８８． Ｐ、 Ｐ、 Ｌ８４９−１．８５１）に
開示されるように、この超電導材料は粉末状態の原料を
加圧成形して得たベレットを焼結するか、あるいは、基
板上にスバ／り法などにより堆積させたアモルファス状
の廃材を熱処理によって結晶化させて作製されていた。]! 188. P, P, L849-1.851), this superconducting material is produced by sintering a pellet obtained by press-molding powdered raw materials, or by applying a sputtering method etc. onto a substrate. It was made by crystallizing amorphous waste material deposited by heat treatment.
（ハ）発明が解決しようとする課題
ところがこのタリウム、カルシウム、バリウム、銅の酸
化物超電導材料の製造方法は非常に誰しく、持にタリウ
ムの素材であるＴＩｌ、Ｏｌの融点が７００℃稈度と低
いので、焼結処理中にこのＴ２□Ｏ１が昇華してしまう
間組点があった。(c) Problems to be Solved by the Invention However, the method for manufacturing oxide superconducting materials of thallium, calcium, barium, and copper is extremely complicated, especially since the melting point of TIl and Ol, which are the raw materials for thallium, is 700°C. Because the temperature was so low, there was a point where this T2□O1 sublimated during the sintering process.
また、前述の論文に基づいて作成されるＴｅ系のＭｉ主
導材料は金属系の超電導材料に比べ結晶方位による異方
性が大きいので、物性の精密な制御を行いエレクトロニ
クスデバイスに応用するためには、材料全体の結晶方位
をそろえ、また均質な材料を作り局所的に特性が変化す
ることを防ぐ必要がある。ところがこの新しいＴｌ系の
超電導材料は、焼結工程あるいは熱処理による結晶化工
程によって得られるので、さまざまの結晶方位をもつ小
さな結晶粒が一つの材料の中に共存し、さらにその結晶
粒界では超電導特性が著しく低下し局所的に特性が変化
するという欠点があった。Furthermore, since the Te-based Mi-dominated material created based on the above-mentioned paper has greater anisotropy due to crystal orientation than metal-based superconducting materials, it is necessary to precisely control its physical properties and apply it to electronic devices. , it is necessary to align the crystal orientation of the entire material and to create a homogeneous material to prevent local changes in properties. However, since this new Tl-based superconducting material is obtained through a sintering process or a crystallization process using heat treatment, small crystal grains with various crystal orientations coexist within one material, and superconducting properties occur at the grain boundaries. There were disadvantages in that the characteristics deteriorated significantly and the characteristics changed locally.
（ニ）課題を解決するための手段
第１の発明は、タリウムの酸化物と、カルシウムの酸化
物あるいは炭酸塩と、バリウムの酸化物あるいは炭酸塩
と銅の酸化物と、を蓋付きのるつぼに入れて酸化雰囲気
中で９００℃程度の温度で熱処理するものである。(d) Means for Solving the Problems The first invention is to combine thallium oxide, calcium oxide or carbonate, barium oxide or carbonate, and copper oxide in a crucible with a lid. It is then heat-treated at a temperature of about 900° C. in an oxidizing atmosphere.
・第２の発明は、タルウムの酸化物と、カルシウムの酸
化物あるいは炭酸塩と、バリウムの酸化物あるいは炭酸
塩と銅の酸化物とを蓋付きるつぼにいメ’して酸化雰囲
気中で高温で溶融する工程と、この溶融物を徐冷する晶
出工程とを有することを特徴とするらのである。-The second invention is to place talum oxide, calcium oxide or carbonate, barium oxide or carbonate, and copper oxide in a crucible with a lid, and heat the mixture at high temperature in an oxidizing atmosphere. and a crystallization step of gradually cooling the melt.
（ホ）作 用
第１の発明によれば、タリウムの酸化物の昇華が防１ト
され、極めて容易にタリウム系の超電導材料を得ること
ができる。(E) Effect According to the first invention, sublimation of thallium oxide is prevented, and a thallium-based superconducting material can be obtained extremely easily.
第２の発明によれば、超電導体単結晶を得ることができ
るので、一つの超電導材料全体の結晶方１９″をそろえ
、かつ結晶粒界のない均質な材料を１することができる
。According to the second invention, since a superconducting single crystal can be obtained, the crystal orientation 19'' of one superconducting material as a whole can be aligned, and a homogeneous material without grain boundaries can be obtained.
（へ）実 施 例
第１の５明の実施例
第１の発明の第１の工程は、Ｔｌ、０．とＣａＣ０１と
Ｂ ａ ＣＯ、とＣｕＯとの粉末をモル比１：２：２：
３で乳鉢を用いて混合するところにある。(f) Embodiment The first step of the first embodiment of the first invention is as follows: Tl, 0. , CaC01, B a CO, and CuO in a molar ratio of 1:2:2:
Step 3 is where you mix using a mortar.
第２の工程は、この発明が最も特徴とするところで、第
１の工程で得た混合粉末を蓋付きのるつぼにいれ、空気
中で９３０℃、１時間の熱処理を電気炉を用して施すと
ころにある。この熱処理工程を蓋付きのるつぼを用いて
行うことによって融点が７００℃程度と低いＴ１．０．
が黒煙となって昇華してしまう現象が防止される。The second step is the most distinctive feature of this invention, in which the mixed powder obtained in the first step is placed in a crucible with a lid, and heat treated in air at 930°C for 1 hour using an electric furnace. It's there. By performing this heat treatment process using a crucible with a lid, the melting point is as low as about 700°C.
The phenomenon of sublimation as black smoke is prevented.
この熱処理に於てはＴＪ、０．のみが溶融し、その融液
中にＣａ ＣＯ、とＢ ａ ＣＯ、とＣｕＯが溶けだし
、最終的にＴｌｒＣａｔＢａｒＣｕｘＯｘで表される超
電導材料が得られる。In this heat treatment, TJ, 0. Ca CO, B a CO, and CuO begin to melt into the melt, and finally a superconducting material represented by TlrCatBarCuxOx is obtained.
この発明の最終工程は、９３０℃、１時間の熱処理後、
４００℃程度まで電気炉中で１時間はどの時間を掛けて
徐冷して炉から取り出すところにある。The final step of this invention is after heat treatment at 930°C for 1 hour,
It is then slowly cooled down to about 400°C in an electric furnace for at least one hour before being taken out from the furnace.
第１図は第１の発明方法によって得られた超電導材料の
温度特性を示しており、ｌｌｏＫ前後で電気抵抗値の急
激な低下が見られ、１０３に″ｃｔ気抵抗抵抗となり、
超電導状態に入ることが確認されている。FIG. 1 shows the temperature characteristics of the superconducting material obtained by the first method of the invention, where a rapid decrease in electrical resistance is seen around 10K, and at 103 it becomes ``ct air resistance.''
It has been confirmed that it enters a superconducting state.
尚、この実施ＶＨではＣａＣ０，とＢ ａ ＣＯ＋で表
されるカルシウム及びバリウムの炭酸塩を用いたが、Ｃ
ａＯとＢａＯで表される酸化物を用いることらできる。In this implementation VH, calcium and barium carbonates represented by CaC0, and B a CO + were used, but C
Oxides represented by aO and BaO can be used.
第２の７明の 施例
第２の発明の第一の工程は、Ｔｊ！、０．とＣａＯとＢ
ａＣｕＯ＋！：ＣｕＯとの粉末を、５：１２：１１１２
のモル比で混合し、アルミナ製のるつぼに密閉し混合物
が溶融する９５０℃に加熱して２時間保持するところに
ある。この加熱保持工程において各粉末が溶融状態にな
る。Second Seventh Example The first step of the second invention is Tj! ,0. and CaO and B
aCuO+! : Powder with CuO, 5:12:1112
The mixture is mixed in a molar ratio of 1, sealed in an alumina crucible, heated to 950°C where the mixture melts, and held for 2 hours. In this heating and holding step, each powder becomes molten.
第２の工程は、前工程の加熱保持状態の溶融物を１時間
に１０℃程度の遅い速度で８００℃まで徐冷するところ
にある。この徐冷工程では溶融物から超電導体単結晶が
晶出される。二〇晶出工程を経て得られた超電導体単結
晶の（ｈｈｌ）面のＸ線回折パターンを第２図に示す。In the second step, the molten material kept heated in the previous step is gradually cooled down to 800° C. at a slow rate of about 10° C. per hour. In this slow cooling step, a superconductor single crystal is crystallized from the melt. FIG. 2 shows the X-ray diffraction pattern of the (hhl) plane of the superconductor single crystal obtained through the 20 crystallization process.
このパターンから、このようにして得られた超電導体単
結晶は、ｃ＝２９．５人、 ａ＝ｂ＝５．４５人なる
格ｆ定数をもつことがわかる。このことより、この超電
導体ｌｉｔ結晶はＴｆｌ！ｌＣａＢａ１ＣｕｌＯＡの表
式で表される化合物であると考えられる。From this pattern, it can be seen that the superconductor single crystal thus obtained has a case f constant of c=29.5 and a=b=5.45. From this, this superconductor lit crystal has Tfl! It is considered to be a compound represented by the formula lCaBa1CulOA.
又、第３図はこの発明によって得られた超電導１本１）
１結晶の固有抵抗の温度特性図を示しており、この図か
ら電気抵抗は９８にで完全に零になることがｌｉ！認で
きる。Also, Figure 3 shows one superconductor obtained by this invention1)
It shows a temperature characteristic diagram of the specific resistance of one crystal, and from this diagram it can be seen that the electrical resistance becomes completely zero at 98 li! I can recognize it.
尚、このようにして得られた超電導体単結晶の化学（ｌ
′１成は、未だ６′ｆ１認されていないが、第２図より
７４’：Ｃａ：Ｂａ：Ｃｕ＝２：ｌ：２：２に近い値で
ある可能性が高い。Furthermore, the chemistry (l) of the superconductor single crystal obtained in this way is
The '1 composition has not yet been recognized as 6'f1, but from FIG. 2 it is highly likely that the value is close to 74':Ca:Ba:Cu=2:l:2:2.
（ト） 范明の効果
第１の発明は、タリウムの酸化物と、カルシウムの酸化
物あるいは炭酸塩と、バリウムの酸化物あるいは炭酸塩
と銅の酸化物と、を蓋付きのるつぼに入れて酸化雰囲気
中で熱処理しているので、タリウムの酸化物の融点より
高い温度においてらタリウムの酸化物が昇華することな
く、容易にＴ１−Ｃａ−Ｂａ−Ｃｕ −０系で表される
超電導材宇斗を得ることができる。(G) Fan Ming's effect The first invention involves placing thallium oxide, calcium oxide or carbonate, barium oxide or carbonate, and copper oxide in a crucible with a lid. Since the heat treatment is performed in an oxidizing atmosphere, the thallium oxide does not sublimate at a temperature higher than the melting point of the thallium oxide, and the superconducting material expressed by the T1-Ca-Ba-Cu-0 system can be easily formed. You can get doo.
又この発明において用いられる超電導材料の素材には、
超電導特性を示すために必要な酸素量をＩ−分に含んで
いるので、シース材に超電導素材を封入した状態で熱処
理することによって外部から酸素を補給することなく超
電導材料を線材化することができ、この発明が超電導材
料の線材化に寄り、するところは大きなものがある。第
２の発明は、タルウムの酸化物と、カルシウムの酸化物
あるいは炭酸塩と、バリウムの酸化物あるいは炭酸塩と
銅の酸化物とを蓋付きるつぼにいれて酸化雰囲気中で高
温で溶融する工程と、この溶融物を徐冷する晶出上程と
を有することより、単結晶を得ているので、焼結による
ものよりも結晶方位がそろい、また結晶粒界のないより
均質な超電導体を１１することができる。In addition, the superconducting materials used in this invention include:
Since I-minute contains the amount of oxygen necessary to exhibit superconducting properties, by heat-treating the superconducting material sealed in the sheath material, it is possible to turn the superconducting material into a wire without supplying oxygen from the outside. This invention has a significant impact on the production of wires from superconducting materials. The second invention is a process in which talum oxide, calcium oxide or carbonate, barium oxide or carbonate, and copper oxide are placed in a crucible with a lid and melted at high temperature in an oxidizing atmosphere. Since a single crystal is obtained by having a crystallization step in which the melt is slowly cooled, the crystal orientation is more uniform than that obtained by sintering, and a more homogeneous superconductor without grain boundaries can be obtained. can do.
第１図は第１の発明の方法によって得られた超電導材料
の電気抵抗の温度特性図である。第２図は第２の発明の
方法によって得られた超電導体単結晶のＸ線回折パター
ン、第３図は同単結晶の電気抵抗の温度特性図である。
Ｒ（ｍΩ）
富
囚FIG. 1 is a temperature characteristic diagram of electrical resistance of a superconducting material obtained by the method of the first invention. FIG. 2 is an X-ray diffraction pattern of a superconductor single crystal obtained by the method of the second invention, and FIG. 3 is a temperature characteristic diagram of electrical resistance of the same single crystal. R (mΩ) wealth prisoner
Claims (2)
は炭酸塩と、バリウムの酸化物あるいは炭酸塩と銅の酸
化物と、を蓋付きのるつぼに入れて酸化雰囲気中で９０
０℃程度の温度で熱処理することを特徴とした超電導材
料の製造方法。(1) Thallium oxide, calcium oxide or carbonate, barium oxide or carbonate, and copper oxide are placed in a crucible with a lid and placed in an oxidizing atmosphere for 90 minutes.
A method for producing a superconducting material characterized by heat treatment at a temperature of about 0°C.
は炭酸塩と、バリウムの酸化物あるいは炭酸塩と銅の酸
化物とを蓋付きるつぼにいれて酸化雰囲気中で高温で溶
融する工程と、この溶融物を徐冷する晶出工程とを有す
ることを特徴とする超電導体単結晶の製造方法。(2) A step in which talum oxide, calcium oxide or carbonate, barium oxide or carbonate, and copper oxide are placed in a crucible with a lid and melted at high temperature in an oxidizing atmosphere; 1. A method for producing a superconductor single crystal, comprising a crystallization step of slowly cooling a molten material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25010488A JPH026330A (en) | 1988-03-07 | 1988-10-04 | Production of superconducting material and superconducting single crystal |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5304388 | 1988-03-07 | ||
| JP63-53043 | 1988-03-07 | ||
| JP25010488A JPH026330A (en) | 1988-03-07 | 1988-10-04 | Production of superconducting material and superconducting single crystal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH026330A true JPH026330A (en) | 1990-01-10 |
Family
ID=26393751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25010488A Pending JPH026330A (en) | 1988-03-07 | 1988-10-04 | Production of superconducting material and superconducting single crystal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH026330A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0264099A (en) * | 1988-08-30 | 1990-03-05 | Sumitomo Electric Ind Ltd | Single crystal manufacturing method of T1-Ca-Ba-Cu-O based high temperature superconducting material |
| US5205382A (en) * | 1990-10-09 | 1993-04-27 | The B. F. Goodrich Company | Aircraft brake |
| EP0589261A1 (en) * | 1992-09-04 | 1994-03-30 | Hitachi, Ltd. | Oxide-based superconductor, a process for preparing the same and a wire material of comprising the same |
| US7936394B2 (en) | 2004-03-24 | 2011-05-03 | Omnivision Technologies, Inc. | Mobile devices having an image sensor for charging a battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5747795A (en) * | 1980-08-09 | 1982-03-18 | Hitachi Cable Ltd | Manufacture of mixed single crystal |
| JPS62292690A (en) * | 1986-06-09 | 1987-12-19 | Katsumi Mochizuki | Boat for growing ii-vi compound single crystal |
| JPH0264099A (en) * | 1988-08-30 | 1990-03-05 | Sumitomo Electric Ind Ltd | Single crystal manufacturing method of T1-Ca-Ba-Cu-O based high temperature superconducting material |
-
1988
- 1988-10-04 JP JP25010488A patent/JPH026330A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5747795A (en) * | 1980-08-09 | 1982-03-18 | Hitachi Cable Ltd | Manufacture of mixed single crystal |
| JPS62292690A (en) * | 1986-06-09 | 1987-12-19 | Katsumi Mochizuki | Boat for growing ii-vi compound single crystal |
| JPH0264099A (en) * | 1988-08-30 | 1990-03-05 | Sumitomo Electric Ind Ltd | Single crystal manufacturing method of T1-Ca-Ba-Cu-O based high temperature superconducting material |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0264099A (en) * | 1988-08-30 | 1990-03-05 | Sumitomo Electric Ind Ltd | Single crystal manufacturing method of T1-Ca-Ba-Cu-O based high temperature superconducting material |
| US5205382A (en) * | 1990-10-09 | 1993-04-27 | The B. F. Goodrich Company | Aircraft brake |
| EP0589261A1 (en) * | 1992-09-04 | 1994-03-30 | Hitachi, Ltd. | Oxide-based superconductor, a process for preparing the same and a wire material of comprising the same |
| US5545610A (en) * | 1992-09-04 | 1996-08-13 | Hitachi, Ltd. | Oxide-based superconductor, a process for preparing the same and a wire material of comprising the same |
| US7936394B2 (en) | 2004-03-24 | 2011-05-03 | Omnivision Technologies, Inc. | Mobile devices having an image sensor for charging a battery |
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