JPS63308814A - Forming method for oxide superconductor - Google Patents
Forming method for oxide superconductorInfo
- Publication number
- JPS63308814A JPS63308814A JP62144925A JP14492587A JPS63308814A JP S63308814 A JPS63308814 A JP S63308814A JP 62144925 A JP62144925 A JP 62144925A JP 14492587 A JP14492587 A JP 14492587A JP S63308814 A JPS63308814 A JP S63308814A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- superconducting
- superconductor
- oxide superconductor
- powder
- 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 19
- 238000000034 method Methods 0.000 title description 6
- 239000000243 solution Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims description 20
- 239000011259 mixed solution Substances 0.000 claims 1
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 239000000919 ceramic Substances 0.000 abstract description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010419 fine particle Substances 0.000 abstract 4
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 abstract 2
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Inorganic materials [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 238000005245 sintering Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 239000010409 thin film Substances 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 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
Landscapes
- Chemically Coating (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は安定な超伝導特性を有する超伝導体を簡易に形
成する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for easily forming a superconductor having stable superconducting properties.
従来、酸化物超伝導材料には、Ｙ−Ｂａ−Ｃｕ酸化物等
が多（開発されている。これらは、粉体または酸化物を
構成する各素材の硝酸塩を溶した水溶液として作られて
いる。前者の粉体では任意の型枠に粉体を圧入し、これ
を焼結することによって超伝導体を作製していた。Conventionally, many oxide superconducting materials have been developed, such as Y-Ba-Cu oxide. In the former case, superconductors were produced by press-fitting the powder into an arbitrary mold and sintering it.
第３図は焼結前後の超伝導粉体間の結合状況を示した図
であり、焼結後にも超伝導粉体１の間には、空隙２が存
在することがわかる。第４図はグリセリン等のバインダ
用溶液３に超伝導粉体１を混合した例であり、焼結する
ことによって溶液３が飛散し、一旦空隙２となり、これ
が小さくなる。FIG. 3 is a diagram showing the state of bonding between the superconducting powders before and after sintering, and it can be seen that voids 2 exist between the superconducting powders 1 even after sintering. FIG. 4 shows an example in which superconducting powder 1 is mixed with a binder solution 3 such as glycerin, and by sintering, the solution 3 is scattered and forms voids 2, which become smaller.
いずれの例にしても、粉体の結合状態に空隙が存在する
ことにより、超伝導特性としての終端温度Ｔｃや臨界電
流密度Ｊｃがともに低下し、特性が劣化する。In any of the examples, the presence of voids in the bonded state of the powder reduces both the terminal temperature Tc and the critical current density Jc as superconducting properties, resulting in deterioration of the properties.
また後者の溶液としては酸化物超伝導体を構成する素材
、例えばイツトリウム、バリウムおよび銅の硝酸塩の水
溶液をそれぞれ作成し、さらにそれらを混合した状態の
ものである。この溶液から超伝導体の薄膜を作成する工
程を第５図に示す。The latter solution is prepared by preparing aqueous solutions of nitrates of materials constituting the oxide superconductor, such as yttrium, barium, and copper, and then mixing them. FIG. 5 shows the process of creating a superconductor thin film from this solution.
４は前記溶液である。この溶液４を基板５の上に塗布し
、これを焼結することによって超伝導体薄膜６が得られ
る。溶液は任意形状物体の表面に塗布するが、粘度が低
いためにその塗布厚さは数μｌ以下であり、超伝導特性
を示す長尺線材を入手する場合には、長手方向に厚さの
偏差を生じ・安定した超伝導体を作製しにくい欠点があ
る。4 is the solution. A superconductor thin film 6 is obtained by applying this solution 4 onto a substrate 5 and sintering it. The solution is applied to the surface of an object of arbitrary shape, but due to its low viscosity, the coating thickness is several μl or less, and when obtaining a long wire that exhibits superconducting properties, the thickness deviation in the longitudinal direction is required. This has the drawback that it is difficult to produce stable superconductors.
本発明の目的は、超伝導粉体を焼結する従来法では焼結
した粉体間に空隙等が生じ安定した超伝導特性を示さな
い欠点を解決し、扱いやすくかつ良好な特性を示す酸化
物超伝導体の形成方法を提供することにある。The purpose of the present invention is to solve the drawback that the conventional method of sintering superconducting powder does not exhibit stable superconducting properties due to the formation of voids between the sintered powders, and to develop an oxidation method that is easy to handle and exhibits good properties. An object of the present invention is to provide a method for forming a physical superconductor.
本発明は超伝導粉体と、焼結して超伝導特性を示す溶液
とを混合し、適度な粘度を与えることを最も主要な特徴
とする。従来の技術では、粉体または溶液をそれぞれ圧
粉するか塗布して超伝導体を形成するために、圧粉法で
は粉体相互に存在する空隙のために、密度の高い結晶を
形成できず、また溶液では厚肉に被覆したり、形成形出
来ない欠点があるが、本発明ではこの両欠点を一挙に改
善する点が特徴である。The main feature of the present invention is that superconducting powder is mixed with a solution that exhibits superconducting properties by sintering to give an appropriate viscosity. In conventional technology, superconductors are formed by compacting or coating powder or solution, respectively, but the compacting method cannot form dense crystals due to the voids that exist between the powders. In addition, solutions have the disadvantage that they cannot be coated thickly and cannot be formed, but the present invention is characterized by improving both of these disadvantages at once.
〔実施例〕
第１図は本発明の一実施例を示す図であり、１はＹ−Ｂ
ａ−Ｃｕ酸化物超伝導体の極細径の粉体である。[Example] Fig. 1 is a diagram showing an example of the present invention, and 1 is a diagram showing an example of the present invention.
This is an ultra-fine powder of a-Cu oxide superconductor.
４はＹ（ＮＯ３） ｆｆ、 Ｂａ（ＮＯ３） ！＋ Ｃ
ｕ（ＮＯｓ） ｚの各０．５１１Ｉｏｌ／ｌ溶解してい
る水溶液を室温で、１：２：３の混合比で混ぜた溶液で
あり、この溶液は銀線、またはセラミック板に塗布し酸
素雰囲気中で９００〜９５０°Ｃで、３時間以上焼結す
ることによって、超伝導特性を示す材料である。第１図
は前記溶液４に粉体１を混合した焼結前の状態と、これ
を焼結して粉体１相互間に第５図に示した超伝導体薄膜
６が形成され、超伝導体の結晶が全面一様に成長した状
態を示している。4 is Y(NO3) ff, Ba(NO3)! ＋C
This is a solution in which an aqueous solution containing 0.511 Iol/l of each of u(NOs) and z is mixed at a mixing ratio of 1:2:3 at room temperature.This solution is applied to a silver wire or ceramic plate and placed in an oxygen atmosphere. It is a material that exhibits superconducting properties when sintered at 900 to 950°C for 3 hours or more. FIG. 1 shows the state before sintering in which the powder 1 is mixed with the solution 4, and the superconductor thin film 6 shown in FIG. This shows that the crystals of the body have grown uniformly over the entire surface.
第２図に、この実施例で得られた超伝導材料の抵抗の温
度特性を示した。なお、この超伝導材料は、粘度１ ｐ
ｏｉｓｅとした溶液にセラミック線材を浸して成形し、
焼結して得たものである。９２Ｋから抵抗値は減少し、
９０Ｋにおいて抵抗値は完全にＯΩとなることがわかる
。一方図中点線は第４図の従来例に示したように、超伝
導特性を示す粉体にバインダー用溶液としてグリセリン
等超伝導特性を有しない溶液を混合し焼結した物体の特
性であり、９０に以下になっても、残留抵抗を有し、特
性の悪いことがわかる。なお、本発明にかかわる適度な
粘性をもった超伝導材料は、任意形状の物体表面にハケ
によって塗布したり、ふきつけて成形することも可能で
あり、また単独で任意形状に形成することも可能である
。FIG. 2 shows the temperature characteristics of the resistance of the superconducting material obtained in this example. Note that this superconducting material has a viscosity of 1 p
Ceramic wire is immersed in an oise solution and shaped.
It is obtained by sintering. The resistance value decreases from 92K,
It can be seen that the resistance value becomes completely OΩ at 90K. On the other hand, the dotted line in the figure shows the characteristics of an object obtained by mixing powder exhibiting superconducting properties with a solution that does not have superconducting properties such as glycerin as a binder solution and sintering the mixture, as shown in the conventional example in Fig. 4. It can be seen that even if the value is less than 90, there is residual resistance and the characteristics are poor. The superconducting material with appropriate viscosity according to the present invention can be applied to the surface of an object of any shape by brushing or wiping it to form it, or it can also be formed into any shape by itself. It is.
以上説明したように、超伝導粉体とその粉体と同じ素材
を溶解した溶液を混合し、前記粉体相互間の空間に超伝
導体薄膜を生成することから空隙のない安定した特性の
超伝導材料を安易に形成することができ、かつ適度な粘
性をもつことからいかなる形状にも成形することができ
る利点がある。As explained above, by mixing superconducting powder and a solution containing the same material as the powder, and creating a superconducting thin film in the space between the powders, a superconductor with stable characteristics without voids is produced. It has the advantage that it can be easily formed into a conductive material and can be molded into any shape because it has a suitable viscosity.
第１図は本発明の実施例を示す図であり、第３図、第４
図、第５図は従来の実施例を示す図であって、それぞれ
焼結前後の粉体の間の空隙の状態を示している。第２図
は本発明と従来例とにより形成された超伝導体の抵抗の
温度特性を示す図である。
１・・・超伝導粉体、２・・・空隙、３・・・バインダ
用溶液、４・・・超伝導体を構成する各素材を溶解した
溶液、５・・・基板、６・・・超伝導体薄膜。FIG. 1 is a diagram showing an embodiment of the present invention, and FIGS.
FIG. 5 is a diagram showing a conventional example, and shows the state of voids between powder before and after sintering, respectively. FIG. 2 is a diagram showing the temperature characteristics of the resistance of superconductors formed according to the present invention and a conventional example. DESCRIPTION OF SYMBOLS 1... Superconducting powder, 2... Voids, 3... Binder solution, 4... Solution in which each material constituting the superconductor is dissolved, 5... Substrate, 6... Superconductor thin film.
Claims (1)
材を溶解させた溶液に入れて混合し、混合した溶液を任
意形状に形成して焼結することを特徴とする酸化物超伝
導体の形成方法。An oxide characterized in that an oxide superconducting powder is mixed in a solution in which each material constituting the oxide superconducting powder is dissolved, and the mixed solution is formed into an arbitrary shape and sintered. How to form superconductors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62144925A JPS63308814A (en) | 1987-06-10 | 1987-06-10 | Forming method for oxide superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62144925A JPS63308814A (en) | 1987-06-10 | 1987-06-10 | Forming method for oxide superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63308814A true JPS63308814A (en) | 1988-12-16 |
Family
ID=15373405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62144925A Pending JPS63308814A (en) | 1987-06-10 | 1987-06-10 | Forming method for oxide superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63308814A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02157152A (en) * | 1988-12-08 | 1990-06-15 | Idemitsu Petrochem Co Ltd | Production of superconducting material |
-
1987
- 1987-06-10 JP JP62144925A patent/JPS63308814A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02157152A (en) * | 1988-12-08 | 1990-06-15 | Idemitsu Petrochem Co Ltd | Production of superconducting material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS63308814A (en) | Forming method for oxide superconductor | |
| JP2817048B2 (en) | Method for producing Bi-Sr-Ca-Cu-O-based superconducting film by screen printing | |
| JP2002217460A (en) | Superconducting component, dielectric resonator, and method of manufacturing the superconducting component | |
| JPH0248458A (en) | Ceramic superconductor and production thereof | |
| JP2565894B2 (en) | Method for producing oxide superconducting material | |
| JPS63304529A (en) | Formation of oxide superconductor thin film | |
| JP3590567B2 (en) | Manufacturing method of oxide superconducting wire and oxide superconducting wire | |
| JP2727565B2 (en) | Superconductor manufacturing method | |
| JP2889595B2 (en) | Method for forming electrode of oxide superconductor film | |
| JPS63276820A (en) | Manufacture of oxide superconductor | |
| JP3149170B2 (en) | Method for producing bismuth-based oxide superconductor | |
| JP2595274B2 (en) | Method of forming oxide-based superconductor layer | |
| JPS63292523A (en) | Manufacture of superconductor cable | |
| JP2701161B2 (en) | Method for producing high-density oxide superconductor | |
| JPH02263754A (en) | Production of oxide superconductor | |
| JP2876139B2 (en) | Manufacturing method of oxide superconducting sintered body | |
| JP3713284B2 (en) | Manufacturing method of oxide superconducting coil | |
| JPH0215519A (en) | Method of forming conductor junction film for ceramics superconductor | |
| JPH0433382A (en) | Manufacture of ceramic superconducting film | |
| JPH02207422A (en) | Manufacture of oxide superconducting wire rod | |
| JPH0375103A (en) | Production of superconductive layer | |
| JPH01194214A (en) | Manufacture of oxide superconductive compact | |
| JPH01128408A (en) | Manufacture of ceramics system superconductor coil | |
| JPH02217320A (en) | Production of bi-based oxide superconductor | |
| JPH02189818A (en) | Manufacture of oxide superconductive thick film |