JPH01130745A - Separation of superconducting material and device therefor - Google Patents
Separation of superconducting material and device thereforInfo
- Publication number
- JPH01130745A JPH01130745A JP62289880A JP28988087A JPH01130745A JP H01130745 A JPH01130745 A JP H01130745A JP 62289880 A JP62289880 A JP 62289880A JP 28988087 A JP28988087 A JP 28988087A JP H01130745 A JPH01130745 A JP H01130745A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- superconducting
- carrier gas
- ferromagnetic
- 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 67
- 238000000926 separation method Methods 0.000 title claims description 17
- 230000005291 magnetic effect Effects 0.000 claims abstract description 39
- 239000012159 carrier gas Substances 0.000 claims abstract description 28
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 17
- 239000001307 helium Substances 0.000 claims abstract description 7
- 229910052734 helium Inorganic materials 0.000 claims abstract description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000011084 recovery Methods 0.000 claims abstract 3
- 239000000126 substance Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 9
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 23
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/021—Separation using Meissner effect, i.e. deflection of superconductive particles in a magnetic field
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、さまざまの臨界温度を持つ超電導材料および
非超電導材料から成る混合物質（粉末またはウィスカー
）から目的とする値以上の臨界温度を持つ超電導物質の
みを分離する方法、およびその分離装置に関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for producing mixtures (powders or whiskers) of superconducting materials and non-superconducting materials having various critical temperatures, which have a critical temperature higher than a desired value. The present invention relates to a method for separating only superconducting substances and a separation device therefor.
超電導材料の粉末（またはウィスカー）を得る方法とし
て、バルクの材料を粉砕する方法、化学反応や蒸発、凝
固現象を利用して、固相、液相または気相中に粒子（ま
たはウィスカー）を析出する方法などが知られている（
Ｔ、 Ｗａｔａｒｉ、 Ｔ、 Ｎａｋａｍａｔｓｕａｎ
ｄ Ａ、 Ｋａｔｏ ； Ｊｏｕｒｎａｌ ｏｆ ｔｈ
ｅ Ｌｅｓｓ−ＣｏｍｍｏｎＭｅｔａｌｓ、 ９１（１
９８３）Ｌ９． Ｒ，Ｍ、 Ｐｏｗｅｌｌ、 Ｗ、Ｊ、
５ｋｏｃｐｏｌａｎｄ Ｍ、 Ｔｉｎｋｈａｍ ：
Ｊ、 Ａｐｐｌ、 Ｐｈｙｓ、 ４８（１９７９）７８
８）。As a method to obtain superconducting material powder (or whiskers), particles (or whiskers) are precipitated in the solid, liquid, or gas phase by pulverizing the bulk material, or by using chemical reactions, evaporation, or solidification phenomena. There are known methods to do this (
T, Watari, T, Nakamatsuan
d A, Kato ; Journal of th
e Less-CommonMetals, 91(1
983) L9. R.M., Powell, W.J.
5kocpoland M, Tinkham:
J, Appl, Phys, 48 (1979) 78
8).
得られる超電導物質の形状、粒径分布、純度、諸特性、
コスト等は、超電導材料の種類、その製造方法および使
用原料に大きく依存する。したがって、超電導物質の応
用目的によって、これらの選択がなされる。The shape, particle size distribution, purity, and various properties of the superconducting material obtained,
Cost etc. largely depend on the type of superconducting material, its manufacturing method, and the raw materials used. Therefore, these selections are made depending on the application purpose of the superconducting material.
超電導材料の粉末またはウィスカーの各種の製造方法に
おいて、粉砕などの製造工程中に不純物が混入する。超
電導相の組成にばらつきがある。In various methods for producing powder or whiskers of superconducting materials, impurities are mixed in during the production process such as pulverization. There are variations in the composition of the superconducting phase.
あるいは目的とする超電導相以外の相も同時に生成する
などの原因により、得られる粉末またはウィスカー中に
は、一般に目的とする値以上の臨界温度を持つ超電導物
質以外に、目的とする値以下の臨界温度を持つ超電尋物
質、あるいは非超屯１物質なども含まれる。Or, due to reasons such as the simultaneous formation of phases other than the desired superconducting phase, the resulting powder or whiskers generally contain superconducting materials with a critical temperature below the desired value, in addition to superconducting materials with a critical temperature above the desired value. It also includes superconducting materials that have temperature and non-superconducting materials.
従来はこのような混合物質がそのまま線、板など、各種
の応用に用いられていたため、最終製品の超電導特性を
本来の超電導材料の特性に近づけることが困難であった
。このため目的とする値以下の臨界温度を持つ超電導物
質や非超電導物質が生成する超電導材料の粉末またはウ
ィスカーを製造する方法は、その他の諸性質が他の製造
方法より優れていても、採用することができなかった。Conventionally, such mixed materials have been used as they are for various applications such as wires and plates, making it difficult to make the superconducting properties of the final product close to those of the original superconducting material. For this reason, methods for producing powder or whiskers of superconducting materials produced from superconducting or non-superconducting materials that have a critical temperature below the desired value should not be adopted, even if their other properties are superior to other production methods. I couldn't do that.
この発明は上記の問題点を解決するためになされたもの
で、各種の方法で得られた混合物質の中から目的とする
値以上の臨界温度を持つ超電導物質のみを分離する方法
およびその分離装置を得ることを目的とする。This invention was made to solve the above problems, and is a method and a separation device for separating only superconducting substances having a critical temperature higher than a desired value from a mixture of substances obtained by various methods. The purpose is to obtain.
この発明に係る超電導物質の分離方法は、鉛直方向の磁
界中に、分離の対象となる混合物質をヘリウム等のキャ
リヤガスとともに、任意の温度に保持したまま水平方向
に導入することにより、磁気的作用により、高磁界中に
入り込めず落下する超電導物質、磁気的作用を受けずに
磁界中を通り抜ける非強磁性非超電導物質、および磁極
に吸引される強磁性非超電導物質を分離回収するもので
ある。The method for separating superconducting materials according to the present invention involves horizontally introducing a mixed material to be separated into a vertical magnetic field together with a carrier gas such as helium while maintaining it at a desired temperature. This system separates and collects superconducting materials that cannot enter the high magnetic field and fall due to the action, non-ferromagnetic non-superconducting materials that pass through the magnetic field without being affected by the magnetic action, and ferromagnetic non-superconducting materials that are attracted to the magnetic poles. be.
この発明に係る超電導物質の分離装置は、上記の分離方
法を実現するために、鉛直方向の磁界を発生することの
できる磁石、その磁界中を水平方向にガスを通過させる
非磁性材料の管、その管の一端から混合物質をヘリウム
等のキャリヤガスとともに導入する混合物質供給装置、
混合物質を任意の温度に保持したままキャリヤガスとと
もに磁界中に導入するように少なくとも上記管の一部を
当該温度に保つ恒温槽、キャリヤガスとともに磁界中に
導入される混合物質のうち磁界中を通過できずに落下す
る超電導物質の回収装置、キャリヤガスとともに磁界を
通過した非強磁性非超電導物質を分離するフィルタ、キ
ャリヤガスの排気装置、および非強磁性非超電導物質の
回収装置から成るものである。A superconducting substance separation apparatus according to the present invention includes a magnet capable of generating a vertical magnetic field, a tube made of a non-magnetic material that allows gas to pass horizontally through the magnetic field, and a magnet capable of generating a vertical magnetic field. A mixed substance supply device that introduces the mixed substance together with a carrier gas such as helium from one end of the tube;
A constant temperature bath that keeps at least a part of the tube at a certain temperature so that the mixed material is introduced into the magnetic field together with the carrier gas, and It consists of a collection device for superconducting materials that cannot pass through and fall, a filter that separates non-ferromagnetic non-superconducting materials that have passed through the magnetic field along with the carrier gas, a carrier gas exhaust device, and a collection device for non-ferromagnetic non-superconducting materials. be.
この発明の超電導物質の分離方法および分離装置におい
ては、混合物質供給装置から分離対象となる混合物質を
キャリヤガスとともに供給すると。In the superconducting material separation method and separation apparatus of the present invention, a mixed material to be separated is supplied from a mixed material supplying device together with a carrier gas.
混合物質中恒温槽によって保たれる所定の温度において
超電導を示す物質は高磁界に入り込めずに落下し、非強
磁性非超電導物質は磁気作用を受けずに磁界中を通り抜
け、強磁性非超電導物質は磁極に吸引されて、それぞれ
分離される。Substances that exhibit superconductivity at a given temperature maintained in a thermostatic chamber in a mixed substance will not be able to enter the high magnetic field and will fall, while non-ferromagnetic non-superconducting substances will pass through the magnetic field without being subjected to magnetic action and will become ferromagnetic non-superconducting. The substances are attracted to the magnetic poles and separated.
本発明は超電導体を磁界中に導入しようとすると反発力
を受ける現象を利用したものであり、これにより目的と
する値以上の臨界温度を持つ超電導物質のみを得ること
ができる。このため分離した超電導物質を用いて作られ
た線、板等の製品の超電導特性は従来の非分離のものよ
り優れる。従って目的とする値以下の臨界温度を持つ超
電導物質や非超電導物質を原理的に同時に生成する超電
導物質（粉末、ウィスカー等）の製造方法も有効になる
。The present invention utilizes the phenomenon that when a superconductor is introduced into a magnetic field, it receives a repulsive force, and as a result, only superconducting materials having a critical temperature higher than a desired value can be obtained. Therefore, the superconducting properties of products such as wires and plates made using separated superconducting materials are superior to conventional non-separated products. Therefore, a method for producing a superconducting material (powder, whisker, etc.) that, in principle, simultaneously produces a superconducting material and a non-superconducting material having a critical temperature below a target value is also effective.
以下、この発明の超電導物質の分離方法および分離装置
を実施例により具体的に説明する。Hereinafter, the superconducting material separation method and separation apparatus of the present invention will be specifically explained with reference to Examples.
第１図はこの発明の一実施例による超電導物質の分離装
置の概略図である。図において、（１）は鉛直方向の磁
界を発生する磁石、（２）はその磁界中を水平方向にガ
スを通過させるガラス、ステンレス、スチール等の非磁
性材料の管、（３）はこの管（２）に混合物質（４）を
供給する混合物質供給装置で、バルブ（５）、内圧等に
よりその供給率を調整できる。（６）はヘリウム等のキ
ャリヤガスを導入するキャリヤガス導入口であり、ガス
の流量と混合物質の供給層との調整によりキャリヤガス
中への混合物質の分離性、混合物質の移動速度等が制御
される。（７）は内部を任意の温度に設定できる恒温槽
で、キャリヤガスとともに運搬される混合粉末を一定温
度に保持したまま磁界中に導入するためのものである。FIG. 1 is a schematic diagram of a superconducting material separation apparatus according to an embodiment of the present invention. In the figure, (1) is a magnet that generates a vertical magnetic field, (2) is a tube made of non-magnetic material such as glass, stainless steel, or steel that allows gas to pass horizontally through the magnetic field, and (3) is this tube. A mixed substance supply device that supplies the mixed substance (4) to (2), the supply rate of which can be adjusted using a valve (5), internal pressure, etc. (6) is a carrier gas inlet for introducing a carrier gas such as helium, and by adjusting the gas flow rate and the supply layer of the mixed substance, the separability of the mixed substance into the carrier gas, the moving speed of the mixed substance, etc. can be adjusted. controlled. (7) is a constant temperature bath whose interior can be set to any desired temperature, and is used to introduce the mixed powder conveyed together with the carrier gas into the magnetic field while maintaining it at a constant temperature.
したがって、磁石（１）は必ずしもこの恒温槽（７）の
内部に設置する必要はない。Therefore, the magnet (1) does not necessarily need to be installed inside this thermostatic oven (7).
キャリヤガスのボンベもこの恒温槽（７）の内部に設置
する必要はないが、少なくとも適度の長さの管（２）の
一部は恒温槽（７）の内部にある必要がある。It is not necessary that the carrier gas cylinder is also installed inside this thermostatic oven (7), but at least a portion of the pipe (2) of a suitable length needs to be inside the thermostatic oven (7).
（８）は混合物質（４）のうち、磁界中に入り込めず落
下する超電導物質（９）の回収容器、（１０）はキャリ
ヤガスとともに磁界中を通過した非強磁性非超電導物質
（１１）を通過させず、キャリヤガスのみを排気口（１
２）を通して排気させるためのフィルタで、必要に応じ
て真空ポンプ等を用いて排気することも可能である。（
１３）は非強磁性非超電導物質（１１）の回収容器であ
る。回収容器（８） 、 （１３）はバルブ（１４）を
付けて、取りはずし可能な状態にしておけば１分離中に
も取り換えが可能となる。(8) is a collection container for the superconducting material (9) that cannot enter the magnetic field and falls out of the mixed material (4), and (10) is the non-ferromagnetic non-superconducting material (11) that has passed through the magnetic field together with the carrier gas. The exhaust port (1
2) A filter for evacuation through the air, and if necessary, evacuation can be performed using a vacuum pump or the like. (
13) is a collection container for the non-ferromagnetic non-superconducting material (11). If the collection containers (8) and (13) are equipped with valves (14) and made removable, they can be replaced even during one separation.
上記のように構成された分離装置による超電導物質の分
離方法は、恒温槽（７）によって所定の温度に保ちなが
ら、混合物質供給装置（３）から混合物質（４）を供給
し、キャリヤガス導入口（６）から導入するキャリヤガ
スとともに管（２）に供給すると、磁石（１）によって
形成される磁界により、当該温度で超電導を示す超電導
物質（９）は磁界に入り込めずに落下し、回収容器（８
）に回収される。また非強磁性非超電導物質（１１）は
磁界中を通り抜け、フィルタ（１０）によりキャリヤガ
スから分離されて回収容器（１３）に回収され、強磁性
非超電導物質は磁石（１）により吸引されて分離する。A method for separating superconducting substances using a separation device configured as described above involves supplying a mixed substance (4) from a mixed substance supplying device (3) while maintaining a predetermined temperature in a constant temperature bath (7), and introducing a carrier gas. When supplied to the tube (2) together with a carrier gas introduced from the port (6), the superconducting material (9) that exhibits superconductivity at the temperature cannot enter the magnetic field and falls due to the magnetic field formed by the magnet (1). Collection container (8
) will be collected. In addition, the non-ferromagnetic non-superconducting material (11) passes through the magnetic field, is separated from the carrier gas by the filter (10) and collected in the collection container (13), and the ferromagnetic non-superconducting material is attracted by the magnet (1). To separate.
実施例１
次に、上記装置を用いた超電導物質の分離例を説明する
。Ｙ２Ｏ１、ＢａＣＯ３、ＣｕＯの各粉末を３：６：８
のモル比で配合した原料を用いて焼結体を作成した。得
られた焼結体の抵抗率の温度変化を測定したところ、第
２図の曲線（Ａ）のように約９１にで超電導転移を示し
、転移幅は約ＩＫであった。またこの焼結体の７７に、
ｆｔｔ磁界における臨界電流密度は３１５Ａ／ａ＆であ
った。この焼結体を粉砕後Ｘ線回折により相の固定をし
たところ、この試料は超電導相ＹＢａ２Ｃｕ、 Ｏ，と
絶縁相Ｙ、 ＢａＣｕＯ，とから成り、各々のＸ線回折
の最大ピーク強度はほぼ等しいことが判明した。Example 1 Next, an example of separation of a superconducting substance using the above-mentioned apparatus will be explained. Each powder of Y2O1, BaCO3, and CuO was mixed in a ratio of 3:6:8.
A sintered body was created using raw materials mixed at a molar ratio of . When the temperature change in resistivity of the obtained sintered body was measured, it showed a superconducting transition at about 91° C. as shown by curve (A) in FIG. 2, and the transition width was about IK. Also, in 77 of this sintered body,
The critical current density in the ftt magnetic field was 315 A/a&. When this sintered body was crushed and the phases were fixed by X-ray diffraction, it was found that this sample consisted of a superconducting phase YBa2Cu, O, and an insulating phase Y, BaCuO, and the maximum peak intensity of each X-ray diffraction was almost equal. It has been found.
粉砕して得た粉末約１００ｇを第１図の混合物質供給装
置（３）に入れ、キャリヤガス導入口（６）によりヘリ
ウムガスを流し、恒温槽（７）の内部の温度を９１Ｋに
設定した。次にバルブ（５）を開けて、混合物質供給装
置（３）の内圧を上げ、 １０ｇ／ｍｉｎの割合で粉末
を供給したところ、回収容器（８）には黒色の、回収容
器（１３）には緑色の粉末が回収された。回収容器（８
）に回収された黒色粉末の超電導物質（９）は約４０ｇ
であり、Ｘ線回折の結果、この粉末は単一超電導相ＹＢ
ａ２Ｃｕ３０．であることがわかった。磁石（１）の中
心部の管（２）の内壁に微量の鉄の粉末が付着していた
が、これは粉砕の際に混入したものと思われる。Approximately 100 g of the powder obtained by pulverization was placed in the mixed substance supply device (3) shown in Figure 1, helium gas was passed through the carrier gas inlet (6), and the temperature inside the thermostatic chamber (7) was set at 91K. . Next, the valve (5) was opened to increase the internal pressure of the mixed substance supply device (3), and powder was supplied at a rate of 10 g/min. A green powder was recovered. Collection container (8
) The black powder superconducting material (9) collected in
As a result of X-ray diffraction, this powder has a single superconducting phase YB
a2Cu30. It turned out to be. A small amount of iron powder was found adhering to the inner wall of the tube (2) in the center of the magnet (1), but this was probably mixed in during the crushing process.
分離回収した超電導粉末を用い、先の焼結体と同じ条件
で再び焼結体を作り、抵抗率の温度依存性を測定したと
ころ、第２図の曲線（Ｂ）のように、臨界温度は約９２
にと約ＩＫ上昇して、転移幅は約０．２にと狭くなり、
常電導状態における抵抗率も大幅に減少した。また７７
に電磁界におけるＪｃは３４５０Ａ／ａＡであった。Using the separated and recovered superconducting powder, we made a sintered body again under the same conditions as the previous sintered body and measured the temperature dependence of the resistivity.As shown in curve (B) in Figure 2, we found that the critical temperature was Approximately 92
The IK increased to approximately 0.2, and the transition width narrowed to approximately 0.2.
The resistivity in the normal conducting state was also significantly reduced. 77 again
Jc in the electromagnetic field was 3450 A/aA.
実施例２
次に別の製造方法による超電導粉末の分離例を説明する
。Example 2 Next, an example of separating superconducting powder using another manufacturing method will be described.
微粉末合成法として、アークプラズマを利用した方法が
ある６溶射ガン等により発生したアークプラズマ中に原
料を投下して、気相状態から粉末を析出させるもので、
冷却速度が極めて高いために粒成長が進まず、微粉末が
得られる。しかしながら、この方法により化合物や合金
の微粉末を合成しようとする場合、目的とする化合物な
いし合金と同時に別の相を同時に生成することが避けら
れない例が多い。例えばＹ−Ｂａ−Ｃｕ−０系について
以下に説明する。As a fine powder synthesis method, there is a method that uses arc plasma6.In this method, the raw material is dropped into the arc plasma generated by a thermal spray gun, etc., and the powder is precipitated from the gas phase.
Because the cooling rate is extremely high, grain growth does not proceed and a fine powder is obtained. However, when attempting to synthesize fine powder of a compound or alloy by this method, it is often unavoidable to simultaneously generate another phase at the same time as the target compound or alloy. For example, the Y-Ba-Cu-0 system will be explained below.
Ｙ２Ｏ，、ＢａＣ０ｔ、ＣｕＯの粉末を１：４：６のモ
ル北で配合、混合した原料を用いて、アークプラズマ法
による微粉末の合成を試みた。Ｘ線回折の結果、得られ
た粉末は超電導相ＹＢａ２Ｃｕ、 Ｏ□以外に、ＢａＣ
ｕＯ□、ＣｕＯ等の多くの相が含まれていた。得られた
粉末を、実施例１と同様の方法で分離して単一超電導相
を得た後、焼結体を作成した。その抵抗率の温度依存性
は第２図の曲線（Ｃ）に示されるように、曲線（Ｂ）と
ほぼ同様であったが、常電導状態における抵抗率はさら
に低い値であった。また７７に′老磁界における臨界電
流密度は４７５ＯＡ＃ｄと、極めて高い値を示した。常
電導状態における抵抗率が低く、臨界電流密度が高い理
由は、微粉末を用いたために、焼結性が向上し緻密な焼
結体が得られたためと思われる。Synthesis of fine powder by arc plasma method was attempted using a raw material prepared by blending and mixing powders of Y2O, BaC0t, and CuO in a molar ratio of 1:4:6. As a result of X-ray diffraction, the obtained powder contained superconducting phases YBa2Cu and O□, as well as BaC
Many phases such as uO□ and CuO were contained. The obtained powder was separated in the same manner as in Example 1 to obtain a single superconducting phase, and then a sintered body was created. As shown by curve (C) in FIG. 2, the temperature dependence of the resistivity was almost the same as curve (B), but the resistivity in the normal conducting state was an even lower value. In addition, the critical current density in 77' old magnetic field was 475OA#d, which was an extremely high value. The reason why the resistivity in the normal conducting state is low and the critical current density is high is thought to be that the use of fine powder improved sinterability and produced a dense sintered body.
以上説明したように、この発明によれば、さまざまの臨
界温度を持つ超電導材料および非超電導材料の混合物質
の中から、任意の値以上の臨界温度を持つ超電導物質の
みを分離することが可能となるため、これを用いて作ら
れた製品の超電導特性を、従来の分離せずに作られたも
のより向上させる効果があるばかりでなく、高臨界温度
の超電導物質（粉末またはウィスカー）だけでなく、他
の物質も同時に生成することが避けられない超電導物質
の製造方法も有効に利用できる効果がある。As explained above, according to the present invention, it is possible to separate only superconducting substances having a critical temperature higher than an arbitrary value from a mixture of superconducting materials and non-superconducting materials having various critical temperatures. Therefore, it not only has the effect of improving the superconducting properties of products made using this material compared to those made without conventional separation, but also has the effect of improving the superconducting properties of products made using this material compared to those made without conventional separation. This method also has the advantage of being able to effectively utilize methods for producing superconducting materials that inevitably produce other materials at the same time.
第１図はこの発明の一実施例による超″屯導物質の分離
装置の概略図、第２図はＹ−Ｂａ−Ｃｕ−０系酸化物超
電導焼結体の抵抗率の温度依存性を表わす線図である。
図において、（Ｉ）は磁石、（２）は管、（３）は混合
物質供給装置、（６）はキャリヤガス導入口、（７）は
恒温槽、（８）、（＋３）は回収容器、（９）は超電導
物質、（１０）はフィルタ、 （１１）は非強磁性非超
電必物質。
（１２）は徘低［１である。Fig. 1 is a schematic diagram of a superconducting material separation device according to an embodiment of the present invention, and Fig. 2 shows the temperature dependence of resistivity of a Y-Ba-Cu-0 based oxide superconducting sintered body. It is a diagram. In the figure, (I) is a magnet, (2) is a tube, (3) is a mixed substance supply device, (6) is a carrier gas inlet, (7) is a constant temperature oven, (8), ( +3) is a collection container, (9) is a superconducting material, (10) is a filter, (11) is a non-ferromagnetic non-superconducting material, and (12) is a wandering [1].
Claims (4)
ともに、任意の温度に保持したまま水平方向に導入する
ことにより、磁界中に入り込めず落下する当該温度で超
電導性を示す物質、磁極に吸引される強磁性非超電導物
質、および磁気的作用を受けずに磁界中を通過する非強
磁性非超電導物質に分離することを特徴とする超電導物
質の分離方法。(1) A magnetic pole is a material that exhibits superconductivity at that temperature by introducing a mixed substance together with a carrier gas horizontally into a vertical magnetic field while maintaining it at a desired temperature. 1. A method for separating superconducting materials, the method comprising separating a ferromagnetic non-superconducting material into a ferromagnetic non-superconducting material that is attracted to a magnetic field, and a non-ferromagnetic non-superconducting material that passes through a magnetic field without being subjected to magnetic action.
特許請求の範囲第１項記載の超電導物質の分離方法。(2) The method for separating superconducting substances according to claim 1, wherein the carrier gas is helium.
の磁界中を水平方向にガスを通過させる非磁性材料の管
、その管の一端から混合物質をキャリヤガスとともに導
入する混合物質供給装置、混合物質を任意の温度に保持
したままキャリヤガスとともに磁界中に導入するように
少なくとも上記管の一部を当該温度に保つ恒温槽、キャ
リヤガスとともに磁界中に導入される混合物質のうち磁
界中に入り込めず落下する超電導物質の回収装置。 キャリヤガスとともに磁界中を通過した非強磁性非超電
導物質の回収装置、およびキャリヤガスの排気装置から
成ることを特徴とする超電導物質の分離装置。(3) A magnet capable of generating a vertical magnetic field, a tube made of a non-magnetic material that allows gas to pass horizontally through the magnetic field, and a mixed substance supply device that introduces the mixed substance together with a carrier gas from one end of the tube; A constant temperature bath that keeps at least a part of the tube at a certain temperature so that the mixed substance is introduced into the magnetic field together with the carrier gas while maintaining it at a desired temperature; A device for collecting superconducting materials that cannot be penetrated and falls. 1. A superconducting material separation device comprising a recovery device for a non-ferromagnetic non-superconducting material that has passed through a magnetic field together with a carrier gas, and a carrier gas exhaust device.
特許請求の範囲第３項記載の超電導物質の分離装置。(4) The superconducting substance separation apparatus according to claim 3, wherein the carrier gas is helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62289880A JPH01130745A (en) | 1987-11-17 | 1987-11-17 | Separation of superconducting material and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62289880A JPH01130745A (en) | 1987-11-17 | 1987-11-17 | Separation of superconducting material and device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01130745A true JPH01130745A (en) | 1989-05-23 |
Family
ID=17748965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62289880A Pending JPH01130745A (en) | 1987-11-17 | 1987-11-17 | Separation of superconducting material and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01130745A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02265661A (en) * | 1987-12-09 | 1990-10-30 | Canon Inc | Apparatus for refining superconducting fine particles |
| US5049540A (en) * | 1987-11-05 | 1991-09-17 | Idaho Research Foundation | Method and means for separating and classifying superconductive particles |
| US6318558B1 (en) * | 1998-02-09 | 2001-11-20 | Hubertus Exner | Method and device for separating different electrically conductive particles |
-
1987
- 1987-11-17 JP JP62289880A patent/JPH01130745A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5049540A (en) * | 1987-11-05 | 1991-09-17 | Idaho Research Foundation | Method and means for separating and classifying superconductive particles |
| JPH02265661A (en) * | 1987-12-09 | 1990-10-30 | Canon Inc | Apparatus for refining superconducting fine particles |
| US6318558B1 (en) * | 1998-02-09 | 2001-11-20 | Hubertus Exner | Method and device for separating different electrically conductive particles |
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