JPH0557724U - Oxide superconducting wire manufacturing equipment - Google Patents
Oxide superconducting wire manufacturing equipmentInfo
- Publication number
- JPH0557724U JPH0557724U JP000237U JP23792U JPH0557724U JP H0557724 U JPH0557724 U JP H0557724U JP 000237 U JP000237 U JP 000237U JP 23792 U JP23792 U JP 23792U JP H0557724 U JPH0557724 U JP H0557724U
- Authority
- JP
- Japan
- Prior art keywords
- tape
- cold rolling
- metal
- rolling mill
- superconducting 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.)
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Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 238000005097 cold rolling Methods 0.000 claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims description 12
- 239000002887 superconductor Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000003826 uniaxial pressing Methods 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- 229910015901 Bi-Sr-Ca-Cu-O Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
- Wire Processing (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Abstract
(57)【要約】
【目的】 冷間圧延加工により臨界電流密度の高い酸化
物超電導線を連続的に製造する。
【構成】 製造装置Ａは、冷間圧延機１２を中央に配置
して、その両側に送り出し装置２、６，７および巻き取
り装置３，８，９がそれぞれ配置され、送り出し装置
２、６，７から連続的に送給されたテープ１および金属
テープ４，５は、ガイドローラ１０，１１間でテープ１
の両面に金属テープ４，５が重ね合わせられて走行し、
ガイドローラ１０，１１間に配置された冷間圧延機１２
により所定の圧下率および圧延速度でテープ１が圧延さ
れる。制御器１６は、各検出器１３，１４，１５で検出
され検出信号に基き、テープ１´および金属テープ４
´，５´を同一の走行速度に制御する。
(57) [Abstract] [Purpose] Oxide superconducting wire with high critical current density is continuously manufactured by cold rolling. [Constitution] In the manufacturing apparatus A, a cold rolling mill 12 is arranged at the center, and feeding devices 2, 6, 7 and winding devices 3, 8, 9 are arranged on both sides of the cold rolling mill 12, respectively. The tape 1 and the metal tapes 4 and 5 continuously fed from the tape 7 are fed between the guide rollers 10 and 11.
Metal tapes 4 and 5 are overlapped on both sides of
Cold rolling mill 12 arranged between guide rollers 10 and 11
Thus, the tape 1 is rolled at a predetermined rolling reduction and rolling speed. The controller 16 detects the tapes 1 ′ and the metal tape 4 based on the detection signals detected by the detectors 13, 14 and 15.
′ And 5 ′ are controlled to have the same traveling speed.
Description
【０００１】[0001]
本考案は超電導線の製造装置に係り、特に金属シース法によるＢｉ系の酸化物 超電導線を製造する装置の改良に関する。 The present invention relates to an apparatus for manufacturing a superconducting wire, and more particularly to improvement of an apparatus for manufacturing a Bi-based oxide superconducting wire by a metal sheath method.
【０００２】[0002]
Ｂｉ系（Ｂｉ−Ｓｒ−Ｃａ−Ｃｕ−Ｏ系）の超電導体は、その臨界温度（Ｔｃ ）が８０〜１１０Ｋと液体窒素温度以上の値を有し、安定性および加工性に優れ ることから酸化物超電導体の実用材料として期待されており、また、板状組織を 有するため、機械的な圧縮加工により結晶の配向性が向上し、高い臨界電流密度 （Ｊｃ）が得られるという特徴がある。 Since a Bi-based (Bi-Sr-Ca-Cu-O) superconductor has a critical temperature (Tc) of 80 to 110 K and a liquid nitrogen temperature or higher, it is excellent in stability and workability. It is expected as a practical material for oxide superconductors, and it has a plate-like structure, so it has the characteristics that the crystal orientation is improved by mechanical compression processing and a high critical current density (Jc) can be obtained. ..
【０００３】 線材を製造するために、現在種々の方法が検討されているが、その代表的な方 法の一つとして金属シース法が知られている。この方法は原料粉末を金属管中に 充填し、これに線引加工や圧延加工等の減面加工を施した後、焼結することによ り内部の原料粉末を超電導体に成長させて超電導線を製造するものである。 この方法は、金属管で被覆されているために非常に加工が容易で、長尺の線材 の製造に適しており、特にＢｉ系の超電導体に対しては、上記の減面加工により 結晶面が同方向に揃い、高いＪｃを有する線材が得られるため適した方法である と言える。Various methods are currently being studied for manufacturing wire rods, and the metal sheath method is known as one of the typical methods. In this method, the raw material powder is filled in a metal tube, subjected to surface-reduction processing such as wire drawing and rolling, and then sintered to grow the raw material powder inside to a superconductor, thereby superconducting. It is for producing wires. Since this method is very easy to work because it is covered with a metal tube, it is suitable for the production of long wire rods. Especially for Bi-based superconductors, the crystal surface reduction by the above-mentioned surface reduction processing Can be said to be a suitable method because wires having a high Jc can be obtained.
【０００４】[0004]
上記のように、Ｂｉ系の超電導体のＪｃを向上させるためには、機械的な圧縮 加工を加える必要があるが、従来はこの加工を熱処理時に一軸プレスで行ってい るため、長さが数ｃｍのものしか加工できず、長尺の線材を製造するには適さな いという問題があった。 As described above, in order to improve the Jc of the Bi-based superconductor, it is necessary to add mechanical compression processing, but conventionally, this processing is performed by uniaxial pressing during heat treatment, so the length is several There is a problem that it is not suitable for manufacturing long wire rods because it can process only those with a diameter of cm.
【０００５】 本考案は上記の問題を解決するためになされたもので、冷間圧延加工により連 続的に圧縮応力を加えて、高いＪｃ値を有する長尺のＢｉ系の酸化物超電導線を 製造することのできる装置を提供することをその目的とする。The present invention has been made to solve the above problems, and continuously applies compressive stress by cold rolling to form a long Bi-based oxide superconducting wire having a high Jc value. The object is to provide a device that can be manufactured.
【０００６】[0006]
上記目的を達成するために、本考案の酸化物超電導線の製造装置は、金属管中 にＢｉ系超電導体の原料粉末を充填して所定の形状に成形したテープ１を巻回し た送り出し装置２および巻き取り装置３と、前記金属管を形成する材料より大き い硬度を有する金属テープ４，５を巻回した送り出し装置６，７および巻き取り 装置８，９と、前記テープ１の両面に前記金属テープ４，５を重ね合わせて走行 させるためのガイドローラ１０，１１と、このガイドローラ間に配置された冷間 圧延機１２とを備えたものである。 In order to achieve the above object, an apparatus for producing an oxide superconducting wire of the present invention is a delivery apparatus 2 in which a metal tube is filled with a raw material powder of a Bi-based superconductor and a tape 1 formed into a predetermined shape is wound. And a winding device 3, feeding devices 6 and 7 and winding devices 8 and 9 in which metal tapes 4 and 5 having a hardness higher than that of the material forming the metal tube are wound, and both sides of the tape 1 are It is provided with guide rollers 10 and 11 for overlapping and running the metal tapes 4 and 5 and a cold rolling mill 12 arranged between the guide rollers.
【０００７】 本考案におけるテープ１は、金属管中に原料粉末を充填して所定の形状に成形 したものであるが、これは例えば、超電導体を構成する元素を一以上含む酸化物 、炭酸塩、硝酸塩等の粉末を（Ｂｉ＋Ｐｂ）：Ｓｒ：Ｃａ：Ｃａ＝２：２：２： ３の概略モル比からなる組成に配合した混合粉末や、この組成に配合した仮焼粉 末を、高温で内部の超電導化合物と反応せず、加工性の良好なＡｇ等の金属管中 に充填してテープ状に成形したものが用いられる。The tape 1 in the present invention is obtained by filling a metal tube with raw material powder and molding it into a predetermined shape. For example, this is an oxide or carbonate containing one or more elements constituting a superconductor. , Nitrates and other powders were mixed in a composition having an approximate molar ratio of (Bi + Pb): Sr: Ca: Ca = 2: 2: 2: 3, and a calcined powder mixed in this composition at high temperature. A metal tube that does not react with the superconducting compound inside and has good workability and is filled into a metal tube such as Ag and formed into a tape shape is used.
【０００８】 このテープ１は、予め熱処理を施して送り出し装置２に巻回し、冷間圧延機１ ２を介して巻き取り装置３で巻き取った後、再度熱処理を施すことにより、より 超電導特性を向上させることができる。この時の熱処理は、８２０〜８５０℃で ５０〜２００時間の条件で行うことが好ましい、この条件では（２２２３）相が 優先的に成長し、８５０℃を越えると（２２１２）相が生成する。The tape 1 is heat-treated in advance and wound on the feeding device 2, wound on the winding device 3 via the cold rolling mill 12, and then heat-treated again to obtain a more superconducting property. Can be improved. The heat treatment at this time is preferably performed under the condition of 820 to 850 ° C. for 50 to 200 hours. Under this condition, the (2223) phase preferentially grows, and when the temperature exceeds 850 ° C., the (2212) phase is formed.
【０００９】 上記のガイドローラ１０，１１間でテープ１の両面に金属テープ４，５が重ね 合わせられて、冷間圧延機１２で圧延加工が施されるが、金属テープ４，５とし ては、金属管を形成する材料より大きい硬度を有するステンレススチールやハス テロイ等の冷間圧延加工時に塑性変形せずに、かつテープ１と圧着しない材料が 用いられる。この金属テープ４，５の厚さは、テープ１の厚さの１〜５倍とする ことが好ましい。これにより、冷間圧延加工時の圧縮応力以外の剪断応力等を金 属テープ４，５に吸収することができ、テープ１に必要な圧力を加えることがで きる。金属テープ４，５の厚さがテープ１の厚さの１倍未満であると、圧縮応力 以外の剪断応力等がテープ１に加わり特性が低下し、一方、５倍を越えると十分 な圧縮効果が得られない。The metal tapes 4, 5 are superposed on both sides of the tape 1 between the guide rollers 10, 11 and rolled by the cold rolling mill 12. A material such as stainless steel or Hastelloy having a hardness higher than that of the material forming the metal tube, which does not plastically deform during cold rolling and is not pressure-bonded to the tape 1, is used. The thickness of the metal tapes 4 and 5 is preferably 1 to 5 times the thickness of the tape 1. As a result, the shear stress other than the compressive stress during cold rolling can be absorbed by the metal tapes 4 and 5, and the tape 1 can be applied with a necessary pressure. If the thickness of the metal tapes 4 and 5 is less than 1 time the thickness of the tape 1, shear stress other than compressive stress is applied to the tape 1 and the characteristics deteriorate, while if it exceeds 5 times, a sufficient compression effect is obtained. Can't get
【００１０】 また、冷間圧延機１２での圧下率が大きくなると、テープ１の伸びが大きくな って十分な圧縮効果が得られないため、圧下率を２０％以下で冷間圧延加工する ことが好ましい。 この冷間圧延加工時の線速は、０．１〜５ｍ／ｍｉｎの範囲が好ましく、線速 が０．１ｍ／ｍｉｎ未満では圧縮力が十分にテープ状線材に伝わらず、また線速 が５ｍ／ｍｉｎを越えると、テープ１と金属テープ４，５が同時に圧延ロールに 咬み込まれるため蛇行して均一な加工ができず、その結果不均質な部分を生じ易 くなる。Further, if the reduction ratio in the cold rolling mill 12 becomes large, the elongation of the tape 1 becomes large and a sufficient compression effect cannot be obtained. Therefore, cold rolling should be performed at a reduction ratio of 20% or less. Is preferred. The linear velocity during this cold rolling is preferably in the range of 0.1 to 5 m / min. If the linear velocity is less than 0.1 m / min, the compressive force is not sufficiently transmitted to the tape-shaped wire rod and the linear velocity is 5 m. If it exceeds / min, the tape 1 and the metal tapes 4 and 5 are simultaneously bitten by the rolling rolls, and meandering cannot be performed uniformly, and as a result, an inhomogeneous portion is likely to occur.
【００１１】 上記のテープ１と金属テープ４，５とは圧延時にスリップを生じない用に制御 することが望ましい。スリップが起こると、集中荷重を生じテープ１に欠陥が導 入され特性が低下する。It is desirable to control the tape 1 and the metal tapes 4 and 5 so that slips do not occur during rolling. When the slip occurs, a concentrated load is generated and a defect is introduced into the tape 1 to deteriorate the characteristics.
【００１２】[0012]
本考案の装置においては、原料粉末を充填して所定の形状に成形したテープ１ を金属テープ４，５を介して冷間圧延機１２で連続的に、かつ実質的に一軸方向 の圧縮力を加えることができるため、結晶配向性の優れたＢｉ系の超電導線を製 造することができる。 In the apparatus of the present invention, the tape 1 formed by filling the raw material powder into a predetermined shape is continuously and substantially uniaxially compressed by the cold rolling mill 12 via the metal tapes 4 and 5. Since it can be added, a Bi-based superconducting wire with excellent crystal orientation can be manufactured.
【００１３】[0013]
以下本考案の実施例および比較例について説明する。 実施例 図１は本考案の酸化物超電導線の製造装置Ａを示したもので、冷間圧延機１２ を中央に配置して、その両側に送り出し装置２、６，７および巻き取り装置３， ８，９がそれぞれ配置されている。 Examples and comparative examples of the present invention will be described below. EXAMPLE FIG. 1 shows an apparatus A for manufacturing an oxide superconducting wire according to the present invention, in which a cold rolling mill 12 is arranged at the center, and feeding devices 2, 6, 7 and a winding device 3, on both sides thereof. 8 and 9 are arranged respectively.
【００１４】 送り出し装置２には、金属管中にＢｉ系超電導体の原料粉末を充填して所定の 形状に成形したテープ１が巻回され、一方送り出し装置６，７には、金属管を形 成する材料より大きい硬度を有する金属テープ４，５が巻回されており、これら の送り出し装置２、６，７から連続的に送給されたテープ１および金属テープ４ ，５は、ガイドローラ１０，１１間でテープ１の両面に金属テープ４，５が重ね 合わせられて走行した後、それぞれ巻き取り装置３，８，９に巻き取られる。The feeding device 2 is wound with a tape 1 which is obtained by filling a metal tube with raw material powder of a Bi-based superconductor and formed into a predetermined shape. On the other hand, the feeding devices 6 and 7 are provided with a metal tube. The metal tapes 4, 5 having a hardness higher than that of the material to be formed are wound, and the tape 1 and the metal tapes 4, 5 continuously fed from the feeding devices 2, 6, 7 are the guide rollers 10 , 11, and the metal tapes 4 and 5 are overlapped on both sides of the tape 1 and run, and then wound on the winding devices 3, 8 and 9, respectively.
【００１５】 ガイドローラ１０，１１間には冷間圧延機１２が配置され、所定の圧下率およ び圧延速度でテープ１が圧延される。 冷間圧延機１２を通過したテープ１´および金属テープ４´，５´の走行速度 は，各検出器１３，１４，１５で検出され、その検出信号が制御器１６へ入力さ れる。A cold rolling mill 12 is arranged between the guide rollers 10 and 11, and the tape 1 is rolled at a predetermined rolling reduction and rolling speed. The running speeds of the tape 1 ′ and the metal tapes 4 ′ and 5 ′ that have passed through the cold rolling mill 12 are detected by the detectors 13, 14 and 15, and the detection signals are input to the controller 16.
【００１６】 制御器１６は、この検出信号に基き、巻き取り装置３，８，９の駆動部１７， １８，１９へ制御信号を出力してテープ１´および金属テープ４´，５´を同一 の走行速度に制御する。 具体例 Ｂｉ2 Ｏ3 、ＰｂＯ、ＳｒＣＯ3 、ＣａＣＯ3 およびＣｕＯの各粉末をＢｉ： Ｐｂ：Ｓｒ：Ｃａ：Ｃｕ＝１．８５：０．２５：２．１０：２．００：３．００ の比率に秤量して十分に混合した後、固相反応法により製造した仮焼粉を外径φ ７ｍｍの銀パイプ中に充填した後、冷間で線引加工および圧延加工を施して厚さ ０．１５ｍｍのテープに成形して、８４０℃で５０時間の熱処理を施した。Based on this detection signal, the controller 16 outputs a control signal to the drive units 17, 18, 19 of the winding devices 3, 8, 9 to make the tape 1'and the metal tapes 4 ', 5'identical. Control to the traveling speed of. Specific examples Bi 2 O 3 , PbO, SrCO 3 , CaCO 3 and CuO powders were prepared by using Bi: Pb: Sr: Ca: Cu = 1.85: 0.25: 2.10: 2.00: 3.00. After being weighed to a ratio and thoroughly mixed, the calcined powder produced by the solid-phase reaction method was filled into a silver pipe having an outer diameter of φ7 mm, and then cold drawn and rolled to give a thickness of 0. The tape was molded into a 0.15 mm tape and heat-treated at 840 ° C. for 50 hours.
【００１７】 次いでこのテープを送り出し装置２に巻回するとともに、送り出し装置６，７ に厚さ０．５ｍｍのＳＵＳ４３０テープを巻回して、これらをガイドローラ１０ ，１１間に重ね合せて走行させ、冷間圧延機１２により圧下率１０％、圧延速度 ０．５ｍ／ｍｉｎで圧延した。 このようにして得られた長さ２０ｍのテープに、さらに８４０℃で５０時間の 熱処理を施して超電導テープを製造した。この超電導テープのＪｃ（７７Ｋ）を 測定した結果、１．８×１０4 Ａ／ｃｍ2 の値を示した。Next, the tape is wound around the feeding device 2, and a SUS430 tape having a thickness of 0.5 mm is wound around the feeding devices 6 and 7, and the SUS430 tape is overlapped between the guide rollers 10 and 11 to run. The cold rolling mill 12 rolled at a rolling reduction of 10% and a rolling speed of 0.5 m / min. The thus-obtained tape having a length of 20 m was further heat-treated at 840 ° C. for 50 hours to produce a superconducting tape. As a result of measuring Jc (77K) of this superconducting tape, a value of 1.8 × 10 4 A / cm 2 was shown.
【００１８】 比較例１ 具体例におけるＳＵＳ４３０テープを用いずに、他は具体例と同一の条件で長 さ１０ｍの超電導テープを製造した。この超電導テープのＪｃ（７７Ｋ）を測定 した結果、２０００Ａ／ｃｍ2 の値を示した。 比較例２ 図１に示す装置を用いずに、具体例と同様にして製造したテープを長さ３ｃｍ に切断し、こ短尺テープに８４０℃で５０時間の熱処理を施した後、圧下率１０ ％の一軸プレスを施し、さらに８４０℃で５０時間の熱処理を施して超電導テー プを製造した。この超電導テープのＪｃ（７７Ｋ）を測定した結果、２．０×１ ０4 Ａ／ｃｍ2 の値を示した。Comparative Example 1 A superconducting tape having a length of 10 m was manufactured under the same conditions as in the specific example except that the SUS430 tape in the specific example was not used. As a result of measuring Jc (77K) of this superconducting tape, a value of 2000 A / cm 2 was shown. Comparative Example 2 Without using the apparatus shown in FIG. 1, a tape manufactured in the same manner as in the specific example was cut into a piece having a length of 3 cm, and the short tape was heat-treated at 840 ° C. for 50 hours. Then, a superconducting tape was manufactured by performing uniaxial pressing and heat treatment at 840 ° C. for 50 hours. As a result of measuring Jc (77K) of this superconducting tape, a value of 2.0 × 10 4 A / cm 2 was shown.
【００１９】[0019]
以上述べたように、本考案の超電導線の製造装置によれば、原料粉末を充填し て所定の形状に成形したテープ１に冷間圧延機１２で連続的に、かつ実質的に一 軸方向の圧縮力を加えることができるため、一軸プレス加工による結果と同様に 高いＪｃ値を有する長尺の超電線を製造することができる。 As described above, according to the superconducting wire manufacturing apparatus of the present invention, the tape 1 formed by filling the raw material powder into a predetermined shape is continuously and substantially uniaxially in the cold rolling mill 12. Since a compressive force can be applied, it is possible to manufacture a long super electric wire having a high Jc value similar to the result of uniaxial press working.
【図１】本考案の酸化物超電導線の製造装置の一実施例
を示す概略図。FIG. 1 is a schematic view showing an embodiment of an apparatus for manufacturing an oxide superconducting wire according to the present invention.
１…テープ ２、６，７…送り出し装置 ３，８，９…巻き取り装置 ４，５…金属テープ １０，１１…ガイドローラ １２…冷間圧延機 １６…制御器 1 ... tape 2,6,7 ... feeding device 3,8,9 ... winding device 4,5 ... metal tape 10,11 ... guide roller 12 ... cold rolling mill 16 ... controller
Claims (1)
填して所定の形状に成形したテープ（１）を巻回した送
り出し装置（２）および巻き取り装置（３）と、前記金
属管を形成する材料より大きい硬度を有する金属テープ
（４，５）を巻回した送り出し装置（６，７）および巻
き取り装置（８，９）と、前記テープ１の両面に前記金
属テープ（４，５）を重ね合わせて走行させるためのガ
イドローラ（１０，１１）と、このガイドローラ間に配
置された冷間圧延機（１２）とを備えたことを特徴とす
る酸化物超電導線の製造装置。1. A feeding device (2) and a winding device (3) in which a tape (1) formed by filling a metal tube with a raw material powder of a Bi-based superconductor and shaping the tape into a predetermined shape, and the metal. A feeding device (6, 7) and a winding device (8, 9) around which a metal tape (4,5) having a hardness higher than that of the material forming the pipe is wound, and the metal tape (4) is provided on both sides of the tape 1. , 5) with guide rollers (10, 11) for traveling in a superposed manner, and a cold rolling mill (12) arranged between the guide rollers, for producing an oxide superconducting wire. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP000237U JPH0557724U (en) | 1992-01-08 | 1992-01-08 | Oxide superconducting wire manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP000237U JPH0557724U (en) | 1992-01-08 | 1992-01-08 | Oxide superconducting wire manufacturing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0557724U true JPH0557724U (en) | 1993-07-30 |
Family
ID=11468367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP000237U Withdrawn JPH0557724U (en) | 1992-01-08 | 1992-01-08 | Oxide superconducting wire manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0557724U (en) |
-
1992
- 1992-01-08 JP JP000237U patent/JPH0557724U/en not_active Withdrawn
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