JPS63239113A - Production of superconductive material - Google Patents
Production of superconductive materialInfo
- Publication number
- JPS63239113A JPS63239113A JP62075372A JP7537287A JPS63239113A JP S63239113 A JPS63239113 A JP S63239113A JP 62075372 A JP62075372 A JP 62075372A JP 7537287 A JP7537287 A JP 7537287A JP S63239113 A JPS63239113 A JP S63239113A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- cuo
- mixture
- molar ratio
- superconducting material
- 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 19
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 230000001590 oxidative effect Effects 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 6
- 238000010583 slow cooling Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000000843 powder Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 4
- 239000008188 pellet Substances 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 2
- 239000004570 mortar (masonry) Substances 0.000 abstract description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 abstract 4
- 238000001816 cooling Methods 0.000 abstract 3
- 239000002904 solvent Substances 0.000 abstract 2
- 238000000748 compression moulding Methods 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 229910052754 neon Inorganic materials 0.000 description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は１００Ｋ＜ケルビン−絶対温度）近傍で超伝導
状態に入る超伝導物質の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a method for producing a superconducting material that enters a superconducting state near 100 K<Kelvin-absolute temperature).
（ロ）従来の技術
超伝導現象はある種の導電性物質を絶対零度近傍に置い
た時にその電気抵抗値が零になるもので、現在考えられ
ている応用を列挙する。(b) Conventional technology Superconductivity is a phenomenon in which the electrical resistance of a certain type of conductive material becomes zero when it is placed near absolute zero, and we will list the applications that are currently being considered.
（１）送電線の無損失送電、
（り核融合におけるプラズマ閉じ込め用コイル、■）リ
ニアモータカーの浮上と推進用のコイル、（荀ｉ＋を磁
推進船の推進用フィル、
（ＳＩＭＲＩの磁場発生と信号検出用のフィル、（ｅ粒
子加速器のビームラインの粒子軌道調整コイルと反応粒
子の検出器、
（７）超高速コンピュータ用ジョセフソン素子、■磁気
脳波計と心磁計の微少磁気検出コイル。(1) Lossless power transmission through power transmission lines, (Coil for plasma confinement in nuclear fusion, ■) Coil for levitation and propulsion of linear motor cars, (Propulsion filter for magnetic propulsion ships using Xun i+, (Magnetic field generation in SIMRI) Fill for signal detection, (particle trajectory adjustment coil and reaction particle detector for beam line of e-particle accelerator, (7) Josephson element for ultra-high-speed computers, minute magnetic detection coil for magnetic electroencephalogram and magnetocardiograph.
このように数多くの応用範囲が考えられるものの、上記
したように超伝導状態は絶対零度近傍に於てのみ生じる
現象であり、その温度を維持することが非常に困難で、
またそのためのコストが極めて高い。Although many possible applications are possible, as mentioned above, the superconducting state only occurs near absolute zero, and it is extremely difficult to maintain that temperature.
Moreover, the cost for this is extremely high.
代表的な超伝導物質としては、ＮｔｚＳｎを挙げること
ができる。このＮｂｍＳｎの臨界温度Ｔ。A typical superconducting material is NtzSn. The critical temperature T of this NbmSn.
は１８にで、そのためにＮｂｍＳｎを超伝導状態に維持
するには沸点が４にの液体ヘリウムを必要とした。この
ヘリウムは我が国には殆ど資源がなく、米国の戦略物質
となっており、入手は極めて困難であった。was 18, which required liquid helium with a boiling point of 4 to maintain NbmSn in a superconducting state. Japan has almost no resources for helium, and it has become a strategic material for the United States, making it extremely difficult to obtain.
一方、１９７０年代の始めにＴ、が２３．９ Ｋという
Ｎｂ、Ｇｅが発見され、その後千年余り、進展は見られ
なかったが、１９８６年４月にＩＢＭが、ＬａとＢａと
ＣｕＯとの化合物がＴ、−３０Ｋを示すことを発表し、
これに続いて、同年１２月に東京大学がＴ、−３７Ｋを
、ＡＴＴのベル研究所がＴ、−４０Ｋを、そして本年の
１月に電子総合研究所がＴ、−５４Ｋを記録した。この
電子総合研究所が記録した超伝導物質は、ＬａとＳｒと
ＣｕＯとの化合物とされている。この電イー総合研究所
が記録した超伝導物質を超伝導状態に維持させるには、
液体水素（沸点−２０Ｋ）、或いは液体ネオン〈沸点−
２７Ｋ）が用い得、超伝導が身近かなものになってきた
。On the other hand, in the early 1970s, Nb and Ge with T of 23.9 K were discovered, and no progress was made for more than a thousand years, but in April 1986, IBM discovered a compound of La, Ba, and CuO. announced that it shows T, -30K,
Following this, in December of the same year, the University of Tokyo recorded T, -37K, ATT's Bell Laboratories recorded T, -40K, and in January of this year, Electronics Research Institute recorded T, -54K. The superconducting material recorded by the Electronic Research Institute is said to be a compound of La, Sr, and CuO. In order to maintain the superconducting material recorded by this Electrical Engineering Research Institute in a superconducting state,
Liquid hydrogen (boiling point -20K) or liquid neon (boiling point -
27K), and superconductivity has become more familiar.
（ハ）発明が解決しようとした問題点
ところがこの電子総合研究所が記録した超伝導物質と豊
も、非常に安価で容易に入手できる液体窒素（沸点−７
７Ｋ）では超伝導状態を得ることはできず、実用性の点
で今−歩であった。(c) Problems that the invention was intended to solve However, the superconducting material recorded by the Electronic Research Institute was extremely cheap and easily available, such as liquid nitrogen (boiling point -7
7K), it was not possible to obtain a superconducting state, and the practicality of this method was still at a disadvantage.
（ニ）問題を解決するための手段
本発明は、Ｙ、０．とＢ ａ ＣＯｓとＣｕＯとを混合
モル比０．２ ： ０．６ ： ２で混合して加圧成形
した後、酸化雰囲気中で焼結し、続いて極めて緩やかな
速度で徐冷することを特徴とした
［Ｙ ＋−−Ｂ ａ ｊ−［Ｃｕ Ｏ−−，１，で表わ
される組成から成る超伝導物質を製造するものである。(d) Means for solving the problem The present invention provides Y, 0. B a COs and CuO are mixed at a molar ratio of 0.2:0.6:2, pressure molded, sintered in an oxidizing atmosphere, and then slowly cooled at a very slow rate. A superconducting material having a characteristic composition represented by [Y +--B a j-[Cu O--, 1] is produced.
（ホ）作用
本発明に依れば、液体水素や液体ネオンに依って超伝導
状態に達する高い臨界温度を有する超伝導物質が１１ｆ
現性良く得ることができる。(E) Effect According to the present invention, a superconducting material having a high critical temperature that reaches a superconducting state by liquid hydrogen or liquid neon is 11f
It can be obtained easily.
（へ）実施例
Ｙ １．１Ｂ ａ ＊、ａ（Ｃｕ Ｏｓｕｍの場合の製
造方法を以下に詳細に記述する。(f) Example Y 1.1B a *, a (The manufacturing method in the case of Cu Osum will be described in detail below.
■第１の工程［原料の混合並びに粉砕工程］Ｙ、０８、
Ｂ ａ ＣＯｓ並びにＣｕＯの粉末をモル比、０．２
： ０．６ ： ２で混合し、有機溶媒、例えばエタノ
ールやメタノールを加えてスターラで攪拌する。その後
、有機溶媒を蒸発させ、乳鉢ですりつぶして粉末状にす
る。■First step [mixing and grinding of raw materials] Y, 08,
B a COs and CuO powder at a molar ratio of 0.2
: 0.6 : 2, add an organic solvent such as ethanol or methanol, and stir with a stirrer. Thereafter, the organic solvent is evaporated and the mixture is ground into a powder in a mortar.
■第２の工程［成形工程］
この粉末を１ｇ秤量し、１７ｍｍ径の金型に入れ、成形
圧力、７５０ｋｇｆ／ｃｍ”でプレスしてペレット状に
固める。■Second process [Molding process] Weigh 1 g of this powder, put it into a mold with a diameter of 17 mm, and press it at a molding pressure of 750 kgf/cm'' to solidify it into a pellet.
■第３の工程［焼結工程］
該工程で得たベレットを赤外線炉に入れ、酸素を流入さ
せながら１０００℃で１時間、焼結を行なった後、極め
て緩やかな速度、即ち１時間に１０℃〜１００℃、望ま
しくは１時間に３０℃の速度で徐冷擢′る。■Third step [Sintering step] The pellet obtained in this step is placed in an infrared furnace and sintered at 1000°C for 1 hour while introducing oxygen, and then sintered at a very slow rate, i.e. 100°C per hour. ℃~100℃, preferably at a rate of 30℃ per hour.
この焼結上程は、酸素中で行なわれたが、酸化雰囲気中
であれば同じような結果が得られることが確認されてお
り、その酸化雰囲気としては、０震／Ｎ、： １／１０
〜Ｏｘ／Ｎ＊：ｔｌｏの範囲内にあることが望ましい。This sintering step was carried out in oxygen, but it has been confirmed that similar results can be obtained in an oxidizing atmosphere, and the oxidizing atmosphere is 0 quakes/N: 1/10
~Ox/N*: It is desirable to be within the range of tlo.
このようにして得られた焼結化合物は、ｙ ＠、−Ｂａ
＊、ａ（ｃ ｕ ｏ ｓ＞＊で表わされる組成から成
り、変形ペロブスカイト構造、或いはそれに類似の結晶
構造を有している。The sintered compound thus obtained is y@, -Ba
*, a(c u o s >>), and has a modified perovskite structure or a crystal structure similar thereto.
こ、）焼結化合物の温度を徐々に下げていくと、温度と
電気抵抗の関係曲線図に示すように、Ｔｃ−８０にで超
伝導状態に入り、完全に電気抵抗が零になる終了温度、
Ｔｃｏ−５０Ｋを記録した。(b) When the temperature of the sintered compound is gradually lowered, it enters a superconducting state at Tc-80, as shown in the temperature-electrical resistance relationship curve, and reaches the end temperature at which the electrical resistance becomes completely zero. ,
Tco-50K was recorded.
（ト）発明の効果
本発明は以上の説明から明らかなように、一般に市販さ
れている素材の攪拌と焼結のみの簡単な工程で超伝導物
質が製造される。そして本発明に依って得られた超伝導
物質は、超伝導状態を得るのに、安価で容易に人手でき
る液体ネオンや液体水素を用いることができ、に記した
超伝導現象の各種の応用分野の実現に本発明が寄りする
ところは大きい。(G) Effects of the Invention As is clear from the above description, the present invention allows superconducting materials to be produced by a simple process of stirring and sintering commonly available materials. In addition, the superconducting material obtained by the present invention can use liquid neon or liquid hydrogen, which can be inexpensive and easily made by hand, to obtain a superconducting state, and can be used in various application fields of the superconducting phenomenon described in . The present invention greatly contributes to the realization of this.
図は本発明超伝導物質の温度と電気抵抗との関係を示す
曲線図である。The figure is a curve diagram showing the relationship between temperature and electrical resistance of the superconducting material of the present invention.
Claims (4)
ル比０．２：０．６：２で混合して加圧成形した後、酸
化雰囲気中で焼結し、続いて極めて緩やかな速度で徐冷
することを特徴とした ［Ｙ＿１＿−＿ｗＢａ＿ｗ］＿ｘ［ＣｕＯ＿４＿−＿ｚ
］＿ｙで表わされる組成から成る超伝導物質の製造方法
。(1) Y_2O_3, BaCO_3, and CuO are mixed at a molar ratio of 0.2:0.6:2 and pressure-molded, then sintered in an oxidizing atmosphere, and then slowly cooled at a very slow rate. [Y_1_-_wBa_w]_x[CuO_4_-_z
] A method for producing a superconducting material having a composition represented by _y.
間は約１時間であることを特徴とした特許請求の範囲第
１項記載の超伝導物質の製造方法。(2) The method for producing a superconducting material according to claim 1, wherein the sintering temperature is approximately 1000° C. and the sintering time is about 1 hour.
ることを特徴とした特許請求の範囲第２項記載の超伝導
物質の製造方法。(3) The method for producing a superconducting material according to claim 2, wherein the slow cooling condition is 10°C to 100°C per hour.
Ｏ＿２／Ｎ＿２：１／０の範囲内にあることを特徴とし
た特許請求の範囲第１〜３項記載の超伝導物質の製造方
法。(4) The above oxidizing atmosphere is O_2/N_2:1/10~
4. A method for producing a superconducting material according to claims 1 to 3, characterized in that O_2/N_2: is within the range of 1/0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62075372A JPS63239113A (en) | 1987-03-27 | 1987-03-27 | Production of superconductive material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62075372A JPS63239113A (en) | 1987-03-27 | 1987-03-27 | Production of superconductive material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63239113A true JPS63239113A (en) | 1988-10-05 |
Family
ID=13574311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62075372A Pending JPS63239113A (en) | 1987-03-27 | 1987-03-27 | Production of superconductive material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63239113A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63230565A (en) * | 1987-03-11 | 1988-09-27 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Superconductive substance |
| JPS63248723A (en) * | 1987-03-17 | 1988-10-17 | コンパニイ・ジエネラル・デレクトリシテ | Superconductive oxide of copper with mixed atomic values and manufacture |
-
1987
- 1987-03-27 JP JP62075372A patent/JPS63239113A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63230565A (en) * | 1987-03-11 | 1988-09-27 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Superconductive substance |
| JPS63248723A (en) * | 1987-03-17 | 1988-10-17 | コンパニイ・ジエネラル・デレクトリシテ | Superconductive oxide of copper with mixed atomic values and manufacture |
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