JPH042611A - Production of superconductor - Google Patents
Production of superconductorInfo
- Publication number
- JPH042611A JPH042611A JP2101189A JP10118990A JPH042611A JP H042611 A JPH042611 A JP H042611A JP 2101189 A JP2101189 A JP 2101189A JP 10118990 A JP10118990 A JP 10118990A JP H042611 A JPH042611 A JP H042611A
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- yttrium
- barium
- ratio
- copper
- 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 31
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 13
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052788 barium Inorganic materials 0.000 claims abstract description 11
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 9
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 8
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 8
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000001301 oxygen Substances 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000010304 firing Methods 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000011369 resultant mixture Substances 0.000 abstract 2
- 238000001354 calcination Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910052691 Erbium Inorganic materials 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 3
- -1 rare earth compounds Chemical class 0.000 description 3
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 3
- 229910052689 Holmium Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000005749 Copper compound Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001553 barium compounds Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000001880 copper compounds Chemical class 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 101150093042 trmO gene Proteins 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
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (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） 本発明は超電導体の製造法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for manufacturing superconductors.
（従来の技術）
従来セラミックス超電導体は、セラミックス超電導体用
原料粉を混合し、これを焼成して製造していた。(Prior Art) Conventionally, ceramic superconductors have been manufactured by mixing raw material powder for ceramic superconductors and firing the mixture.
例えばプラセオジウムとネオジウムを除くイツトリウム
、ホルミウム、エルビウム等の希土類元素、バリウム及
び銅を主成分とし、その比率が原子比で１：２：３にな
る超電導体は、上記元素を含む酸化物、炭酸塩等の化合
物を原子比でｌ：２：３になるように秤量して混合した
後、焼成して製造していた。For example, superconductors whose main components are rare earth elements such as yttrium, holmium, and erbium excluding praseodymium and neodymium, barium, and copper, and whose atomic ratio is 1:2:3, are oxides and carbonates containing the above elements. These compounds were weighed and mixed in an atomic ratio of 1:2:3, and then fired.
（Ｊａｐａｎｅｓｅ Ｊｏｕｒｎａｌ ｏｆ Ａｐｐ
ｌｉｅｄ Ｐｈｙｓｉｃｓ）Ｖｏし２６．１２号（１９
８７年１２月刊）、Ｌ１９５９〜１９６０頁に示される
。(Japanese Journal of App
Lied Physics) Vo 26.12 (19
(December 1987), pages L1959-1960.
（発明が解決しようとする課題）
しかしながら上記の方法で得られた板状超電導体は、超
電導特性における臨界温度は高いが、臨界電流密度が低
く、必ずしもその壕まで実用化されるレベルではなかっ
た。(Problem to be solved by the invention) However, although the plate-shaped superconductor obtained by the above method has a high critical temperature for superconducting properties, its critical current density is low, and it is not necessarily at a level that can be put to practical use. .
具体的には、プラセオジウムとネオジウムを除くイツト
リウム、ホルミウム、エルビウム等の希土類化合物、バ
リウム化合物及び銅化合物を主成分とし、この比率を１
：２：３とした酸化物系超電導体は、超電導状態が発現
する温＊ （Ｔ：ゝｅｔ）は９６にで、抵抗が零にｆｘ
ル温ｆｌ （Ｔｃｅｒ’ ） ハ９１にと良好でるる
。しかし臨界電流密度（以下Ｊｃとする）が０．９Ａ／
ａｍ”で一般に報告されているレベルに比較し、低いレ
ベルにとどまっている。Specifically, the main components are rare earth compounds such as yttrium, holmium, and erbium, excluding praseodymium and neodymium, barium compounds, and copper compounds, and the ratio is 1.
:2:3, the temperature at which the superconducting state appears * (T: et) is 96, and the resistance becomes zero at fx
The temperature fl (Tcer') was good at 91. However, the critical current density (hereinafter referred to as Jc) is 0.9A/
am” remains at a low level compared to the level generally reported.
なお出湯が印加された場合、そのＪｃＶｉ大幅に低下し
易く１例えば１ｏ−”ｒの弱い［％の印加では１〜１に
、１０−’Ｔでは上〜」−にまで低下する。Note that when hot water is applied, the JcVi is likely to drop significantly, to a weak level of 1, for example, 1 o-''r [1 to 1 when an application of 10% is applied, and above to ~'' when 10-'T is applied.
まｆｃｌｏ−”Ｔ程度の弱磁場の印加による低下は。However, the decrease is due to the application of a weak magnetic field on the order of fclo-''T.
超電導体粒子間の弱結合に起因する。このため９７０℃
以上の高温の焼成が試みられたが、この方法でＦｉ超電
導体中に液相が生成してそれが流出し９組成変動を起こ
すため目的が達せられないという欠点がある。It is caused by weak bonds between superconductor particles. For this reason, 970℃
Although firing at the above-mentioned high temperature has been attempted, this method has the disadvantage that a liquid phase is generated in the Fi superconductor and flows out, causing compositional fluctuations, making it impossible to achieve the objective.
本発明は上記のような欠点の生じない超電導体の１＃造
法を提供することを目的とするものである。The object of the present invention is to provide a 1# manufacturing method for superconductors that does not have the above-mentioned drawbacks.
（課題を解決するための手段）
本発明−ｉらはプラセオジウムとネオジウムを除くイッ
トリウムなどの希土類元素、バリウム及び鋼を主成分と
する超電導体のＪｃの向上について種々検討した結果、
その組成比を意図的にずらし。(Means for Solving the Problems) As a result of various studies conducted by the present inventors on improving the Jc of superconductors whose main components are rare earth elements such as yttrium excluding praseodymium and neodymium, barium, and steel,
The composition ratio was intentionally shifted.
また従来より高温で焼成することにより高いＪｃが得ら
れ、また磁場の印加によるＪｃの低下が防止できること
を見出し２本発明を完成するに至った。They also found that a higher Jc can be obtained by firing at a higher temperature than in the past, and that reduction in Jc due to the application of a magnetic field can be prevented, leading to the completion of the present invention.
本発明は希土類元素（ただしプラセオジウムとネオジウ
ムを除く）及び／又はイットリウム、バリウム及び銅を
主成分とし、その比率が原子比で１．０８〜１．３５：
２二ｇｇＮ ： ３士０．０８となる割合で秤量して混
合した後、酸素含有気流中で９７０〜１３００℃の温度
で焼成する超電導体の製造法に関する。The main components of the present invention are rare earth elements (excluding praseodymium and neodymium) and/or yttrium, barium, and copper, with an atomic ratio of 1.08 to 1.35:
It relates to a method for producing a superconductor, which involves weighing and mixing at a ratio of 22 ggN: 3 to 0.08, and then firing the mixture at a temperature of 970 to 1300°C in an oxygen-containing air flow.
本発明において用いられるプラセオジウムとネオジウム
を除く希土類元素及び／又はイットリウム、バリウム並
びに銅は、それぞれ上記に示す成分の酸化物、炭酸塩、
有機酸塩、無機酸塩、有機金属化合物等の形態で用いら
れる。Rare earth elements other than praseodymium and neodymium and/or yttrium, barium, and copper used in the present invention are oxides, carbonates, and carbonates of the components shown above, respectively.
It is used in the form of organic acid salts, inorganic acid salts, organometallic compounds, etc.
プラセオジウムとネオジウムを除く希土類元素及び／又
はイツトリウム、バリウム並びに銅の配合割合は、原子
比で１．０８〜１．３５．２−ｏ、ｏｓ 。The compounding ratio of rare earth elements other than praseodymium and neodymium and/or yttrium, barium, and copper is 1.08 to 1.35.2-o, os in terms of atomic ratio.
３土００８の範囲とされ、この範囲外では高温での焼成
によってＪｃが低下し易く、また磁場依存性が犬きくな
るという欠点が生じる。Outside this range, Jc tends to decrease due to firing at high temperatures, and the magnetic field dependence becomes severe.
焼成条件は、酸素含有気流中で焼成することが必要とさ
れ、酸素を含有しない雰囲気中で焼成すると酸素を含有
する雰囲気中で再焼成しなければならない。酸素含有量
は、１０体積％り上であることが好ましく、２０体積チ
以上であればさらに好ましい。The firing conditions require firing in an oxygen-containing air stream, and firing in an oxygen-free atmosphere requires re-firing in an oxygen-containing atmosphere. The oxygen content is preferably 10% by volume or more, and more preferably 20% by volume or more.
焼成温度は９７０〜１３００℃の範囲とされ。The firing temperature is in the range of 970 to 1300°C.
９７０℃未満であると焼結はできるが１弱結合が残り易
く好ましくない。甘た１３００℃を越えると粘度が下が
ｐすぎて組成が不均一になる。If the temperature is lower than 970°C, sintering can be performed, but 1-weak bonds tend to remain, which is not preferable. If the temperature exceeds 1300°C, the viscosity will be too low and the composition will become non-uniform.
（実施例） 以下本発明の詳細な説明する。(Example) The present invention will be explained in detail below.
実施例１
イットリウム、バリウム及び銅の比率が原子比で１．３
５：２：３となるように、酸化イットリウム（信越化学
工業製、純度９９．９％、干扮し径１．５ ｔｌｍ ）
１５２−４ ｇ、炭酸バリウム（和光純薬製、純度９
９．９％、平均粒径２μｍ）３９４．７９粉とした。Example 1 The ratio of yttrium, barium and copper is 1.3 in atomic ratio
Yttrium oxide (manufactured by Shin-Etsu Chemical, purity 99.9%, dried diameter 1.5 tlm) so that the ratio is 5:2:3.
152-4 g, barium carbonate (manufactured by Wako Pure Chemical Industries, purity 9
9.9%, average particle size 2 μm) 394.79 powder.
次に上記の出発原料粉をジルコニア製ポット内にジルコ
ニアポール及びメタノールと共に充填し。Next, the above starting raw material powder was filled into a zirconia pot together with zirconia pole and methanol.
毎分６０回転の条件で６０時時間式混合、粉砕した。乾
燥後、粉砕物をアルミナ焼板にのせ大気中で９５０℃ま
で５０℃／時間の速度で冷却し、ついでアルミナ乳鉢で
粉砕し、平均粒径が１μｍ以下の超電導体粉を得た。Mixing and pulverization were carried out for 60 hours at 60 revolutions per minute. After drying, the pulverized product was placed on an alumina baking plate and cooled in the air to 950°C at a rate of 50°C/hour, and then ground in an alumina mortar to obtain superconductor powder with an average particle size of 1 μm or less.
この後肢超電導体粉１００９をジルコニア製ポット内に
ジルコニアボール及び酢酸エチルと共に充填し、毎分７
５回転の条件で２４時時間式混合。This hindlimb superconductor powder 1009 was filled into a zirconia pot together with zirconia balls and ethyl acetate, and
24-hour mixing under the condition of 5 rotations.
粉砕して該超電導体粉の平均粒径を２５μｍとしたスラ
リーを得た。さらにスラリーにバインダー溶液（中京油
脂製、商品名５Ｅ６０４）を１５９添加して端一に混合
した後乾燥し、平均粒径が１μｍ以下に粗粉砕した成形
粉を得た。The superconductor powder was pulverized to obtain a slurry having an average particle size of 25 μm. Further, 159 g of a binder solution (manufactured by Chukyo Yushi Co., Ltd., trade name 5E604) was added to the slurry, thoroughly mixed, and then dried to obtain a molded powder coarsely pulverized to an average particle size of 1 μm or less.
ついで成形粉を直径が４０ｔｒｍＯ金型内に入れ。Then, the molding powder was put into a 40 trmO mold.
１００ＭＰａの圧力でプレス成形後、成形体をイントリ
ア安定化ジルコニア製の焼板にのせ、大気気流中で１０
０℃まで３０分、１００℃から３００℃まで１０時間で
昇温し、この後酸素気流中で９００℃まで１２時間で昇
温し、さらに１０００℃まで５時間かけて昇温し、１０
００℃で１０時間保持した後、５０℃／時間の速度で冷
却して厚さ０．５ ａｏｎの超電導体を得た。After press molding at a pressure of 100 MPa, the molded body was placed on a baking plate made of Intoria stabilized zirconia and heated for 10 minutes in an air stream.
The temperature was raised to 0°C for 30 minutes, then from 100°C to 300°C in 10 hours, and then the temperature was raised to 900°C in an oxygen stream for 12 hours, and then to 1000°C over 5 hours.
After holding at 00°C for 10 hours, the superconductor was cooled at a rate of 50°C/hour to obtain a superconductor with a thickness of 0.5 aon.
次に得られた超電導体を幅Ｉｎｎに切断した後。After cutting the obtained superconductor into a width Inn.
四端子法でＪｃを測定したところ、液体窒素中７７に零
磁場において７５０ Ａ／ａｍ” 、 １０−” Ｔの
磁場中では５ＱＱＡ／ｃｉ及び１０１Ｔの磁場中では４
０Ａ／ａｍ’であった。When Jc was measured using the four-terminal method, it was 750 A/am" in a zero magnetic field in liquid nitrogen, 5QQA/ci in a 10-" T magnetic field, and 4 in a 101 T magnetic field.
It was 0A/am'.
実施例２
イツトリウム：バリウム：銅の比率が原子比で１．０９
：１．９８：３．．０５となるように実施例１と同様の
原料を秤量し、以下実施例１と同様の工程を経て成形体
を得た。Example 2 Yttrium: barium: copper ratio is 1.09 in atomic ratio
:1.98:3. ．． The same raw materials as in Example 1 were weighed so as to give a weight of 0.05, and the same steps as in Example 1 were carried out to obtain a molded body.
この後、成形体をイツトリア安定化ジルコニア製の焼板
にのせ、以下実施例１と同様の条件で昇温し、最高温度
１０００℃で２０時間保持した後。Thereafter, the molded body was placed on a baking plate made of ittria-stabilized zirconia, heated under the same conditions as in Example 1, and held at a maximum temperature of 1000° C. for 20 hours.
５０℃／時間の速度で冷却して厚さ０．５ ｏｎの超電
導体を得た。A superconductor having a thickness of 0.5 on was obtained by cooling at a rate of 50° C./hour.
以下実施例１と同様に超電導体を幅１肛に切断した後、
四端子法でＪｃを測定したところ、液体窒素中７７に零
磁場において７８０ Ａ／ｃｍ” 、 １０−”ＴＯ磁
場中では５７０Ａ／ａｍ”及び１０−’Ｔの出湯中では
５０ Ａ ／ Ｃｍ”であった。After cutting the superconductor into 1-width pieces as in Example 1,
When Jc was measured using the four-terminal method, it was found to be 780 A/cm" in a zero magnetic field in liquid nitrogen, 570 A/cm" in a 10-"TO magnetic field, and 50 A/cm" in a 10-'T hot water tap. there were.
実施例３ 実施例２のイットリウムをエルビウムに変工。Example 3 Yttrium in Example 2 was changed to erbium.
最高温度９８０℃で２０時間保持して焼成を行った以外
は、実施例２と同様の工程を経て厚さ０．５肛の超電導
体を得た。A superconductor having a thickness of 0.5 mm was obtained through the same steps as in Example 2, except that the firing was performed at a maximum temperature of 980° C. for 20 hours.
以下実施例１と同様に超電導体を幅１ｍｍに切断した後
、四端子法でＪｃを測定したところ、液体窒素中７７に
零磁場において６９０ Ａ／α”、１０−”ＴＯ磁場中
でＦｉ４２０ Ａ／Ｃ！！！２及び１０−’Ｔの磁場中
でＦｉ３０ Ａ／ ｃｍ”でめった。After cutting the superconductor to a width of 1 mm in the same manner as in Example 1, the Jc was measured using the four-probe method, and the Jc was found to be 690 A/α" in a zero magnetic field in liquid nitrogen and 420 A in a 10-" TO magnetic field. /C! ! ! Fi 30 A/cm'' in a magnetic field of 2 and 10-'T.
比較例１
イツトリウム：バリウム：銅の比率が原子比で１：２：
３となるように実施例１と同様の原料を秤量し、以下実
施例１と同様の工程を経て成形体を得た。Comparative Example 1 The atomic ratio of yttrium:barium:copper is 1:2:
The same raw materials as in Example 1 were weighed so as to give a total of 3, and the same steps as in Example 1 were carried out to obtain a molded body.
この後成形体をイツトリア安定化ジルコニア製の焼板に
のせ、以下実施例１と同様の条件で昇温し、最高温度９
５０℃で１０時間保持した後、５０℃／時間の速度で冷
却して厚さ０．５ ｍｍの超電導体を得た。After that, the molded body was placed on a baking plate made of ittria-stabilized zirconia, and the temperature was raised under the same conditions as in Example 1 to reach a maximum temperature of 9.
After being held at 50°C for 10 hours, it was cooled at a rate of 50°C/hour to obtain a superconductor with a thickness of 0.5 mm.
以下実施例１と同様に超電導体を幅１ｍｍに切断した後
、四端子法でＪｃを測定したところ、液体窒素中７７に
零磁場において４５０ Ａ／ｃｍ”、 １０−’Ｔの磁
場中で＃：ｔ１ｏｏＡ／ｃｄ及び１０−’Ｔの磁場中で
は１５Ａ／ｃｍ”であった。After cutting the superconductor to a width of 1 mm in the same manner as in Example 1, Jc was measured using the four-terminal method. : 15 A/cm'' in a magnetic field of t1ooA/cd and 10-'T.
比較例２
最高温度１０２０℃で１０時間保持して焼成を行った以
外は、比較例１と同様の工程を経て厚さ０、５ ｗｎの
超電導体を得た。Comparative Example 2 A superconductor with a thickness of 0.5 wn was obtained through the same steps as in Comparative Example 1, except that the firing was performed by holding at the maximum temperature of 1020° C. for 10 hours.
以下実施例１と同様に超電導体を幅１■に切断した後、
四端子法でＪｃを測定したところ、液体窒素中７ｒｙ、
ｙｌ零磁場において８０ ｋ／ａｌ！２．１０−”ＴＯ
磁場中では２０Ａ／ａｉ”及び１０−’Ｔの磁場中では
４Ａ／ａｍ”であった。After cutting the superconductor into a width of 1 cm as in Example 1,
When Jc was measured using the four-terminal method, 7ry in liquid nitrogen,
80 k/al in zero magnetic field! 2.10-”TO
It was 20 A/ai'' in a magnetic field and 4 A/am'' in a 10-'T magnetic field.
（発明の効果） 本発明の製造法によって得られる超電導体は。(Effect of the invention) The superconductor obtained by the production method of the present invention is as follows.
Ｊｃが高く、磁場が印加された場合でも従来の超電導体
に比較し、Ｊｃの低下が少なく工業的に極めて好適な超
電導体である。This superconductor has a high Jc and exhibits less decrease in Jc than conventional superconductors even when a magnetic field is applied, making it an industrially very suitable superconductor.
Claims (1)
除く）及び／又はイットリウム、バリウム並びに銅を主
成分とし、その比率が原子比で▲数式、化学式、表等が
あります▼となる割合 で秤量して混合した後、酸素含有気流中で９７０〜１３
００℃の温度で焼成することを特徴とする超電導体の製
造法。[Claims] 1. The main components are rare earth elements (excluding praseodymium and neodymium) and/or yttrium, barium, and copper, and the ratio is such that the atomic ratio is ▲There are mathematical formulas, chemical formulas, tables, etc.▼ 970-13 in an oxygen-containing air stream after weighing and mixing at
A method for producing a superconductor, characterized by firing at a temperature of 00°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2101189A JPH042611A (en) | 1990-04-17 | 1990-04-17 | Production of superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2101189A JPH042611A (en) | 1990-04-17 | 1990-04-17 | Production of superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH042611A true JPH042611A (en) | 1992-01-07 |
Family
ID=14294022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2101189A Pending JPH042611A (en) | 1990-04-17 | 1990-04-17 | Production of superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042611A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5385462A (en) * | 1992-03-16 | 1995-01-31 | Nissei Plastic Industrial Co., Ltd. | Vent-type injection molding machine |
-
1990
- 1990-04-17 JP JP2101189A patent/JPH042611A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5385462A (en) * | 1992-03-16 | 1995-01-31 | Nissei Plastic Industrial Co., Ltd. | Vent-type injection molding machine |
| DE4331572A1 (en) * | 1992-03-16 | 1995-03-23 | Nissei Plastics Ind Co | Venting injection-moulding machine |
| DE4331572C2 (en) * | 1992-03-16 | 1996-08-01 | Nissei Plastics Ind Co | Degassing / plasticizing unit for an injection molding machine |
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