JPH02158015A - Manufacture of oxide superconductive ceramic wire rod - Google Patents
Manufacture of oxide superconductive ceramic wire rodInfo
- Publication number
- JPH02158015A JPH02158015A JP63312059A JP31205988A JPH02158015A JP H02158015 A JPH02158015 A JP H02158015A JP 63312059 A JP63312059 A JP 63312059A JP 31205988 A JP31205988 A JP 31205988A JP H02158015 A JPH02158015 A JP H02158015A
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- superconducting
- ceramics
- ag2o
- wire
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 230000006866 deterioration Effects 0.000 claims abstract description 7
- 238000005979 thermal decomposition reaction Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 16
- 229910052709 silver Inorganic materials 0.000 claims description 15
- 239000004332 silver Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical group [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 claims description 10
- 229910001923 silver oxide Inorganic materials 0.000 claims description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 229910001882 dioxygen Inorganic materials 0.000 claims description 3
- VFWRGKJLLYDFBY-UHFFFAOYSA-N silver;hydrate Chemical compound O.[Ag].[Ag] VFWRGKJLLYDFBY-UHFFFAOYSA-N 0.000 claims 1
- 229910000108 silver(I,III) oxide Inorganic materials 0.000 abstract description 11
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 12
- 230000007423 decrease Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- OTCVAHKKMMUFAY-UHFFFAOYSA-N oxosilver Chemical class [Ag]=O OTCVAHKKMMUFAY-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 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
- Metal Extraction Processes (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は酸化物系超電導セラミックスの線材製造方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing a wire of oxide-based superconducting ceramics.
（従来技術）
酸化物系高温超電導セラミックスの線材は、銀や銅等の
金属又はそれらの合金のパイプ中に超電導セラミックス
を充填し、圧延・押出・引抜等で線材の形状に加工した
後、熱処理を施して製造する方法が一般的である。しか
し、線材を熱処理する過程で、超電導セラミックス中の
酸素量が減少し、酸素欠損の多い結晶構造となるため、
超電導特性が劣化することが多かった。このため、線材
のシース材には、酸化物系超電導セラミックスと反応し
にくい銀が使われることが多いが、超電導セラミックス
の酸素欠損を防止するには不十分であった。(Prior art) Oxide-based high-temperature superconducting ceramic wire rods are produced by filling superconducting ceramics into pipes made of metals such as silver or copper or their alloys, processing them into wire rod shapes by rolling, extruding, drawing, etc., and then heat-treating them. A common manufacturing method is to apply However, during the process of heat treating the wire, the amount of oxygen in the superconducting ceramic decreases, resulting in a crystal structure with many oxygen vacancies.
Superconducting properties often deteriorated. For this reason, silver, which does not easily react with oxide-based superconducting ceramics, is often used for the wire sheath material, but this has not been sufficient to prevent oxygen vacancies in superconducting ceramics.
（発明により解決しようとする課題）
酸化物系超電導セラミックスの線材製造過程において、
線材の熱処理時に超電導セラミックスの酸素欠損を防ぐ
ため、超電導セラミックス中に熱処理温度で分解し、酸
素を発生する物質を添加しておくことにより、線材の超
電導特性の劣化を防止することを課題とする。(Problem to be solved by the invention) In the wire manufacturing process of oxide-based superconducting ceramics,
In order to prevent oxygen deficiency in superconducting ceramics during heat treatment of wires, the objective is to prevent deterioration of the superconducting properties of wires by adding a substance that decomposes at the heat treatment temperature and generates oxygen into superconducting ceramics. .
（発明による課題の解決手段）
１）酸化物超電導セラミックスの線材製造過程において
、銀等のシース材内に充填する超電導セラミックス中に
、酸化銀（Ａｇ２０）を５〜３０重景％添加することに
より、線材の熱処理時、酸化銀の熱分解によって発生す
る酸素ガスで超電導セラミックスの酸素欠損量を低下し
、線材の超電導特性の劣化を防止するようにした。(Means for solving problems by the invention) 1) By adding 5 to 30 weight percent of silver oxide (Ag20) to the superconducting ceramics filled in the sheath material such as silver in the wire manufacturing process of oxide superconducting ceramics. During heat treatment of the wire, oxygen gas generated by thermal decomposition of silver oxide reduces the amount of oxygen vacancies in the superconducting ceramic, thereby preventing deterioration of the superconducting properties of the wire.
２）上記１）の方法で、超電導セラミックスにＡｇ２Ｏ
粉末を混合した。2) Add Ag2O to superconducting ceramics using method 1) above.
The powder was mixed.
３）上記１）の方法で超電導セラミックスの中心部にＡ
ｇ、Ｏを充填した。3) Add A to the center of the superconducting ceramic using the method described in 1) above.
g, O was filled.
４）上記１）の方法で超電導セラミックスの外周部にＡ
ｇ２Ｏを充填した。4) Apply A to the outer periphery of the superconducting ceramic using the method 1) above.
Filled with g2O.
５）又上記２）、３）、４）の方法を組合せた。5) Also, the methods 2), 3), and 4) above were combined.
（実施例）
本発明は、酸化物超電導セラミックスの線材製造時に、
超電導セラミックスに酸化銀Ａｇ、Ｏを混合し、線材熱
処理時の酸素欠損を低減し、超電導特性の劣化を防止す
るようにしたものである。(Example) The present invention provides the following advantages:
Silver oxides (Ag and O) are mixed into superconducting ceramics to reduce oxygen vacancies during wire heat treatment and prevent deterioration of superconducting properties.
超電導セラミックスとＡｇ２Ｏを銀等へのシース材に充
填する３つの例を第１図、第２図及び第３図に示す。Three examples of filling a sheath material such as silver with superconducting ceramics and Ag2O are shown in FIGS. 1, 2, and 3.
第１図は超電導セラミックスとＡｇ２Ｏの混合物２を銀
シース１に充填する方法である。FIG. 1 shows a method of filling a silver sheath 1 with a mixture 2 of superconducting ceramics and Ag2O.
第２図は、超電導セラミックス３の中心部にＡｇ２０４
を充填する方法である。この方法では線材の熱処理後、
酸素を放出して残留する銀が線材の中心部に芯を形成し
、シース材１とともに安定化材となる。Figure 2 shows Ag204 in the center of superconducting ceramics 3.
This is a method of filling. In this method, after heat treatment of the wire,
The silver that remains after releasing oxygen forms a core in the center of the wire, and together with the sheath material 1, it becomes a stabilizing material.
また、第３図は超電導セラミックス３の外周部にＡｇ２
０４を充填する方法で、線材の熱処理後。In addition, FIG. 3 shows Ag2 on the outer periphery of the superconducting ceramics 3.
04 after heat treatment of the wire.
酸素を放出して残留する銀は銀シース材１の内側に新し
い銀の層を形成して、これ又安定化材として機能する。The silver that remains after releasing oxygen forms a new layer of silver inside the silver sheathing material 1, which also functions as a stabilizing material.
さて、Ａｇ、Ｏは加熱すると１６０℃付近より熱分解し
、１８５〜１９０℃で酸素の分解分圧が１気圧となる。Now, when Ag and O are heated, they thermally decompose from around 160°C, and the decomposition partial pressure of oxygen becomes 1 atm at 185 to 190°C.
この反応は次の（１）式で表わされる。This reaction is expressed by the following formula (1).
一方、熱処理時の超電導セラミックスの重量変化を熱天
秤で計測した例を第４図に示す。第４図で判るように、
超電導セラミックスの重量は、加熱時に減少し冷却過程
で復元するが、多くの場合完全に元には戻らない。この
重量変化は超電導セラミックスの酸素量の増減であり、
熱処理前後の重量減少分が超電導セラミックスの酸素欠
損量（第４図符号Ａ参照）に相当する。On the other hand, FIG. 4 shows an example in which the weight change of superconducting ceramics during heat treatment was measured using a thermobalance. As you can see in Figure 4,
The weight of superconducting ceramics decreases during heating and recovers during the cooling process, but in many cases it does not completely return to its original weight. This weight change is an increase or decrease in the amount of oxygen in the superconducting ceramics,
The weight reduction before and after the heat treatment corresponds to the amount of oxygen vacancies in the superconducting ceramic (see symbol A in FIG. 4).
したがって、超電導セラミックスにＡｇ２Ｏを混合した
線材では、熱処理時に酸素が発生するため、超電導セラ
ミックスの酸素量は加熱過程での減少が低減する一方、
冷却過程での吸収・復元量が増加するため、熱処理過程
全体を通しての酸素欠損量は低減されることになる。Therefore, in wire rods made of superconducting ceramics mixed with Ag2O, oxygen is generated during heat treatment, so while the amount of oxygen in superconducting ceramics decreases less during the heating process,
Since the amount of absorption and restoration during the cooling process increases, the amount of oxygen vacancies throughout the heat treatment process is reduced.
こ）で添加するＡｇ２Ｏの割合は熱処理前の超電導セラ
ミックスの酸素含有量にも依るが、５〜３０重景％が適
当である。The proportion of Ag2O added in this step depends on the oxygen content of the superconducting ceramic before heat treatment, but is suitably between 5 and 30%.
前述したように酸素を熱分解で放出した後、超電導セラ
ミックス中に残留するＡｇは線材のシース部分と同様、
線材の安定化材として働く。As mentioned above, after oxygen is released by thermal decomposition, the Ag remaining in the superconducting ceramics is similar to the sheath part of the wire.
Works as a stabilizer for wire rods.
（効果）
銀等のシース材内に充填する超電導セラミックス中に、
酸化銀（Ａ ｇｚ Ｏ）を添加することにより、線材の
熱処理時、酸化銀の熱分解によって発生する酸素ガスで
超電導セラミックスの酸素欠損量を低下し、線材の超電
導特性の劣化防止が可能となった・(Effect) In the superconducting ceramics filled in the sheath material such as silver,
By adding silver oxide (AgzO), the amount of oxygen vacancies in superconducting ceramics is reduced by the oxygen gas generated by the thermal decomposition of silver oxide during heat treatment of the wire, making it possible to prevent deterioration of the superconducting properties of the wire. Ta·
【図面の簡単な説明】
第１図は本発明における超電導セラミックスとＡｇ２ｏ
を銀等のシース材に充填する方法の第１例。
第２図は同じく第２例。
第３図は同じく第３例を示す。
第４図は熱処理時の超電導セラミックスの重量変化の状
態を示すグラフ。
図において；
銀シース
混合物
酸化物超電導セラミックス
ｇａＯ
以
上
出
願
人
住友重機械工業株式会社
復代理人[Brief explanation of the drawings] Figure 1 shows superconducting ceramics and Ag2o in the present invention.
A first example of a method of filling a sheath material such as silver with Figure 2 is also the second example. FIG. 3 similarly shows a third example. FIG. 4 is a graph showing the state of weight change of superconducting ceramics during heat treatment. In the figure: Silver sheathed mixed oxide superconducting ceramic gaO Applicant Sumitomo Heavy Industries, Ltd. Sub-Agent
Claims (1)
、銀等のシース材内に充填する超電導セラミックス中に
、酸化銀（Ａｇ＿２Ｏ）を５〜３０重量％添加すること
により、線材の熱処理時、酸化銀の熱分解によって発生
する酸素ガスで超電導セラミックスの酸素欠損量を低下
し、線材の超電導特性の劣化を防止することを特徴とす
る酸化物系超電導セラミックスの線材製造方法。 ２）超電導セラミックス中にＡｇ＿２Ｏを混合すること
を特徴とする請求項１）記載の酸化物系超電導セラミッ
クスの線材製造方法。 ３）超電導セラミックスの中心部にＡｇ＿２Ｏを充填す
ることを特徴とする請求項１）記載の酸化物系超電導セ
ラミックスの線材製造方法。 ４）超電導セラミックスの外周部にＡｇ＿２Ｏを充填す
ることを特徴とする請求項１）記載の酸化物系超電導セ
ラミックスの線材製造方法。 ５）上記請求項２）、３）、４）の方法を組合せたこと
を特徴とする請求項１）記載の酸化物系超電導セラミッ
クスの線材製造方法。[Claims] 1) In the wire manufacturing process of oxide superconducting ceramics, by adding 5 to 30% by weight of silver oxide (Ag_2O) to the superconducting ceramics filled in the sheath material such as silver, A method for producing an oxide-based superconducting ceramic wire, characterized in that during heat treatment, oxygen gas generated by thermal decomposition of silver oxide reduces the amount of oxygen vacancies in the superconducting ceramic, thereby preventing deterioration of the superconducting properties of the wire. 2) The method for producing an oxide-based superconducting ceramic wire according to claim 1, characterized in that Ag_2O is mixed into the superconducting ceramic. 3) The method for manufacturing an oxide-based superconducting ceramic wire according to claim 1, characterized in that the center of the superconducting ceramic is filled with Ag_2O. 4) The method for manufacturing an oxide-based superconducting ceramic wire according to claim 1), characterized in that the outer periphery of the superconducting ceramic is filled with Ag_2O. 5) The method for producing an oxide-based superconducting ceramic wire according to claim 1), characterized in that the methods of claims 2), 3), and 4) are combined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312059A JPH02158015A (en) | 1988-12-12 | 1988-12-12 | Manufacture of oxide superconductive ceramic wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312059A JPH02158015A (en) | 1988-12-12 | 1988-12-12 | Manufacture of oxide superconductive ceramic wire rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02158015A true JPH02158015A (en) | 1990-06-18 |
Family
ID=18024730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63312059A Pending JPH02158015A (en) | 1988-12-12 | 1988-12-12 | Manufacture of oxide superconductive ceramic wire rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02158015A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01163922A (en) * | 1987-09-14 | 1989-06-28 | Sumitomo Electric Ind Ltd | Manufacture of linear superconductive material |
| JPH01167289A (en) * | 1987-12-22 | 1989-06-30 | Fujikura Ltd | Production of oxide superconductor |
| JPH01192760A (en) * | 1988-01-28 | 1989-08-02 | Tokin Corp | Ag2o3-containing oxide superconductor and production thereof |
| JPH01279509A (en) * | 1988-05-06 | 1989-11-09 | Sumitomo Electric Ind Ltd | Manufacture of linear superconductive material |
-
1988
- 1988-12-12 JP JP63312059A patent/JPH02158015A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01163922A (en) * | 1987-09-14 | 1989-06-28 | Sumitomo Electric Ind Ltd | Manufacture of linear superconductive material |
| JPH01167289A (en) * | 1987-12-22 | 1989-06-30 | Fujikura Ltd | Production of oxide superconductor |
| JPH01192760A (en) * | 1988-01-28 | 1989-08-02 | Tokin Corp | Ag2o3-containing oxide superconductor and production thereof |
| JPH01279509A (en) * | 1988-05-06 | 1989-11-09 | Sumitomo Electric Ind Ltd | Manufacture of linear superconductive material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU696752B2 (en) | Improved processing of oxide superconductors | |
| JPS63225409A (en) | Compound superconductive wire and its manufacture | |
| JPH0494019A (en) | Manufacture of bismuth-based oxide superconductor | |
| JP2008140769A (en) | METHOD FOR MANUFACTURING Bi2223 SUPERCONDUCTING WIRE ROD | |
| JPH02158015A (en) | Manufacture of oxide superconductive ceramic wire rod | |
| JPS63274016A (en) | Oxide superconductor and its manufacture | |
| JPH02207420A (en) | Manufacture of superconducting wire rod | |
| JPH02158010A (en) | Manufacture of oxide superconductive ceramic wire rod | |
| JP3848449B2 (en) | Manufacturing method of oxide superconducting wire | |
| JP2633868B2 (en) | Oxide superconducting wire | |
| JPH027309A (en) | Manufacture of oxide type superconductive wire | |
| JPS63276825A (en) | Manufacturing of oxide superconducting wire rod | |
| JPS63225413A (en) | Manufacture of compound superconductive wire | |
| JPH07282659A (en) | Manufacture of high temperature superconducting wire rod | |
| JPH028335A (en) | Sheath for manufacturing of oxide superconducting wire rod | |
| JPH11322439A (en) | Ceramics sheet | |
| JPH11322431A (en) | Pyrogenous material composed of molybdenum disilicide as major part having low oxygen diffusible vitreous coating layer | |
| JPS61264609A (en) | Manufacture externally reinforced compound superconductor | |
| JPS63261629A (en) | Manufacture of superconductive cable | |
| JPH01258314A (en) | Product containing ceramic superconductor and its manufacture | |
| JP2000357423A (en) | Ceramics sheet | |
| JPH04118816A (en) | Manufacture of ceramic superconductor | |
| JPH01167911A (en) | Superconducting complex wire and manufacture thereof | |
| JPH04262310A (en) | Manufacture of oxide superconductive wire rod | |
| JPH11149835A (en) | Bismuth 2212 superconducting wire and its manufacture |