JPH04132603A - Separation of oxide superconductor powder - Google Patents
Separation of oxide superconductor powderInfo
- Publication number
- JPH04132603A JPH04132603A JP2255924A JP25592490A JPH04132603A JP H04132603 A JPH04132603 A JP H04132603A JP 2255924 A JP2255924 A JP 2255924A JP 25592490 A JP25592490 A JP 25592490A JP H04132603 A JPH04132603 A JP H04132603A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- calcined
- composition
- superconducting
- specific gravity
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 60
- 238000000926 separation method Methods 0.000 title claims abstract description 6
- 239000002887 superconductor Substances 0.000 title abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 45
- 230000005484 gravity Effects 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims abstract description 8
- 238000010298 pulverizing process Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 metals such as a) Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Oxygen, Ozone, And Oxides In General (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−にの利用分野］
本発明は酸化物超電導粉末の分離法に関し、更に詳しく
は原料配合物を仮焼、粉砕して得られる仮焼粉砕粉末か
ら超電導組成を有する粉末を、超電導組成と異なる組成
を有する粉末を分離して、超電導組成を有する仮焼粉末
を収得する方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for separating oxide superconducting powder, and more specifically, to separating a superconducting composition from a calcined and pulverized powder obtained by calcining and pulverizing a raw material mixture. The present invention relates to a method for obtaining calcined powder having a superconducting composition by separating powder having a composition different from a superconducting composition.
酸化物超電導粉末を製造する方法として超電導体を構成
する各原料を超電導組成となるように配合して充分混合
し、これを仮焼して超電導粉末を製造する方法は既に良
く知られている。しかしながらこの仮焼粉砕した粉末は
、原料混合時に予め超電導組成となるように配合されて
いるけれども、仮焼することにより超電導組成とは異な
った組成の粉末が副生するを避けられない。このような
超電導組成とは異なった組成（以下異組成という）が混
入した仮焼粉末では超電導特性が低下するので、決して
望ましいものではない。As a method for producing oxide superconducting powder, it is already well known that the raw materials constituting the superconductor are mixed sufficiently to form a superconducting composition, and the mixture is calcined to produce superconducting powder. However, although this calcined and pulverized powder is blended in advance so as to have a superconducting composition when mixing the raw materials, it is inevitable that powder having a composition different from the superconducting composition will be produced as a by-product when calcined. Calcined powder mixed with a composition different from such a superconducting composition (hereinafter referred to as a different composition) is not at all desirable because its superconducting properties deteriorate.
〔発明が解決しようとする課題］
従って本発明が解決しようとする課題は従来の上記難点
を解決することであり、簡単な操作で異組成仮焼粉末を
仮焼粉末から確実に分離しうる方法を提供することであ
る。[Problem to be Solved by the Invention] Therefore, the problem to be solved by the present invention is to solve the above-mentioned conventional difficulties, and to provide a method that can reliably separate calcined powder of different composition from calcined powder with a simple operation. The goal is to provide the following.
この課題は原料配合物を仮焼し、粉砕した粉末から比重
差を利用して異組成粉末だけを分離することにより解決
される。This problem can be solved by calcining a raw material mixture and separating only powders of different composition from the pulverized powder using the difference in specific gravity.
本発明者は従来から上記課題を解決するために研究を続
けてきたが、超電導組成を有する仮焼粉末と異組成を有
する仮焼粉末とは、その組成の差異により各々の比重が
異なってくるのではないかとの全く新しい着想を思いつ
き、この着想に基つき実験的研究を行った結果、これら
両者には比重差のあることが判明し、この比重差を利用
して両者を分離できることを見出した。The present inventor has been conducting research to solve the above problems, but it has been found that calcined powder with a superconducting composition and calcined powder with a different composition have different specific gravity due to the difference in their composition. As a result of conducting experimental research based on this idea, it was discovered that there is a difference in specific gravity between the two, and it was discovered that this difference in specific gravity could be used to separate the two. Ta.
〔発明の作用並びに構成］
本発明に於いては超電導組成を有する仮焼粉末と異組成
を有する仮焼粉末とはこれら両者の比重差を利用して分
離するので、極めて簡単な操作で効率良くこれらを分離
することができる。たとえば遠心分離機を用いたり、ま
た適当な液体媒体中に仮焼粉末を投入してその沈降性の
差を利用することができるので、容易、簡単に分離を行
うことができる。この比重差を利用する手段は本発明に
於いては何等限定されず、これら両粉末の比重差により
これら両者を分離できる手段であるかぎりどのような手
段でも良い。代表的には既に述べた通り遠心分離機を用
いる手段を始め、液媒中に於ける両粉末の比重の差によ
る沈降特性の差を利用する手段、その池水流を用いる分
離等の手段を例示することができる。[Operation and structure of the invention] In the present invention, the calcined powder having a superconducting composition and the calcined powder having a different composition are separated by utilizing the difference in specific gravity between the two, so that the calcined powder can be separated efficiently with extremely simple operation. These can be separated. For example, separation can be carried out easily and easily by using a centrifuge or by putting the calcined powder into an appropriate liquid medium and utilizing the difference in sedimentation properties. The means for utilizing this difference in specific gravity is not limited in any way in the present invention, and any means may be used as long as the two powders can be separated based on the difference in their specific gravity. Typical examples include means using a centrifuge as already mentioned, means using the difference in sedimentation characteristics due to the difference in specific gravity of both powders in a liquid medium, and means such as separation using pond water flow. can do.
本発明に於いて原料配合物を仮焼し、粉砕して仮焼粉末
を製造する手段自体は従来から行われてきた手段が全て
適用され、酸化物超電導体の種類等も従来から知られて
いるものが全て包含される。In the present invention, all conventional means for producing calcined powder by calcining and pulverizing the raw material mixture are applied, and the types of oxide superconductors are also conventionally known. Everything that is there is included.
更に若干詳しく説明すると以下の通りである。酸化物超
電導体の種類としては、Ｙ−Ｂａ−ＣｕＯ系を始め、Ｔ
−ａ −Ｍ−Ｃｕ−０系（但しＭはＢａ、、Ｓｒ、、Ｃ
ａ等の金属）、Ｂ ｉ −Ｍ−Ｃｕ−０系（Ｍは上記に
同じ）等、従来知られているものが包含される。A more detailed explanation is as follows. Types of oxide superconductors include Y-Ba-CuO, T
-a -M-Cu-0 system (where M is Ba, , Sr, , C
Conventionally known metals such as metals such as a), B i -M-Cu-0 systems (M is the same as above) are included.
また原料粉末の調製手段自体も特に限定されず、所定粒
度に唯単に粉砕する手段を始め所謂溶液法、共沈法、ゾ
ルーゲル法等各種の手段で原料粉末を調製すれば良い。Further, the means for preparing the raw material powder itself is not particularly limited, and the raw material powder may be prepared by various methods such as simply pulverizing to a predetermined particle size, a so-called solution method, a coprecipitation method, and a sol-gel method.
調製された原料粉末は常法に従って仮焼される。仮焼の
温度は超電導体の種類等により決定されるが、通常７０
０〜９５０°Ｃ程度で１０〜２００時間程度である。仮
焼物は次いで所定の粒度に粉砕されて仮焼粉末となる。The prepared raw material powder is calcined according to a conventional method. The calcination temperature is determined by the type of superconductor, etc., but is usually 70°C.
It is about 10 to 200 hours at about 0 to 950°C. The calcined product is then ground to a predetermined particle size to produce calcined powder.
尚、より均質な仮焼粉とするためこの仮焼、粉砕の工程
を２回以上繰り返しても良い。既に述べた通りこの仮焼
粉末には超電導組成を有する粉末の他に異組成粉末も含
まれており、これら両粉末の間には比重差があるため、
これを利用して両者を分離する。Incidentally, in order to obtain a more homogeneous calcined powder, the calcining and pulverizing steps may be repeated two or more times. As already mentioned, this calcined powder includes powders with different compositions in addition to powders with superconducting compositions, and since there is a difference in specific gravity between these two powders,
Use this to separate the two.
以下に実施例を示して本発明を具体的に説明する。 EXAMPLES The present invention will be specifically described below with reference to Examples.
実施例Ｉ
原料としてＢｉ２Ｏ３、ＳｒＣＯ３、Ｃａ ＣＯ３、及
びＣｕＯの各粉末を超電導組成たるＢｉ２５ｒｚｃａｚ
ｃｕ３０ｘとなるような配合組成で混合し、この混合物
を７００〜８５０°Ｃで１０〜２００時間仮焼した。こ
の仮焼物を粒径２〜３μｍになるように粉砕した。仮焼
粉砕粉末の組成を分析したところ、超電導組成を有する
粉末と異組成粉末とが混在していることが確認できた。Example I Using powders of Bi2O3, SrCO3, CaCO3, and CuO as raw materials, superconducting composition Bi25rzcaz
The composition was mixed to give cu30x, and this mixture was calcined at 700 to 850°C for 10 to 200 hours. This calcined material was pulverized to a particle size of 2 to 3 μm. When the composition of the calcined and pulverized powder was analyzed, it was confirmed that powder having a superconducting composition and powder having a different composition were mixed together.
一方型枠を組んで製作した型の中に液状エポキシ樹脂（
硬化剤を含まない）を注入し、この中に上記仮焼粉末を
添加し、充分撹拌後更に硬化剤を添加して再度撹拌し、
そのまま自然放置して５〜８時間でエポキシ樹脂を自然
硬化せしめる。この自然硬化の間に上記仮焼粉砕粉末は
比重差によって自然沈降し、第１図の如く上層部（八）
には比重の小さい異組成粉末が、また下層部（Ｂ）には
比重の大きい超電導組成粉末が沈降する。尚第１図中（
１）は型枠、（２）はエポキシ樹脂、（３）ば仮焼粉砕
粉末である。このように超電導組成粉末と異組成粉末と
を分離することができる。On the other hand, liquid epoxy resin (
(does not contain a hardening agent), add the above calcined powder into this, stir thoroughly, then add a hardening agent and stir again.
The epoxy resin is left to naturally harden for 5 to 8 hours. During this natural hardening, the calcined and pulverized powder naturally settles due to the difference in specific gravity, and as shown in Figure 1, the upper layer (8)
A powder of a different composition with a low specific gravity is precipitated in the lower layer (B), and a superconducting composition powder with a high specific gravity is precipitated in the lower layer (B). In addition, in Figure 1 (
1) is a mold, (2) is an epoxy resin, and (3) is a calcined and pulverized powder. In this way, the superconducting composition powder and the different composition powder can be separated.
本発明に依ると極めて簡単な手段で超電導組成を有する
仮焼粉末を異組成を有する仮焼粉末から分離することが
でき、惹いてはこの仮焼粉末から超電導特性の優れた電
線等を製造でき、その産業上の効果は大きい。According to the present invention, a calcined powder having a superconducting composition can be separated from a calcined powder having a different composition by an extremely simple means, and as a result, electric wires etc. with excellent superconducting properties can be manufactured from this calcined powder. , its industrial effects are significant.
第１図は本発明法を説明するための説明図である。 ■・・・型枠 ２・・・エポキシ樹脂 ３・・・仮焼粉末 Ａ・・・−上層部 Ｂ・・・下層部 （以 」二） 第 図 FIG. 1 is an explanatory diagram for explaining the method of the present invention. ■・・・Formwork 2...Epoxy resin 3... Calcined powder A...- Upper management B...Lower part (Hereafter "two) No. figure
Claims (1)
超電導粉末を製造する方法に於いて、上記仮焼し、粉砕
して得られる粉砕粉末から比重差を用いる分離法により
超電導組成を有する粉末を分離することを特徴とする酸
化物超電導粉末の分離法。(1) In a method for producing superconducting powder by calcining and pulverizing a raw material mixture for producing superconducting powder, a superconducting composition is obtained from the pulverized powder obtained by the above-mentioned calcination and pulverization by a separation method using a difference in specific gravity. 1. A method for separating oxide superconducting powder, the method comprising separating powder having the following properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2255924A JPH04132603A (en) | 1990-09-25 | 1990-09-25 | Separation of oxide superconductor powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2255924A JPH04132603A (en) | 1990-09-25 | 1990-09-25 | Separation of oxide superconductor powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04132603A true JPH04132603A (en) | 1992-05-06 |
Family
ID=17285464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2255924A Pending JPH04132603A (en) | 1990-09-25 | 1990-09-25 | Separation of oxide superconductor powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04132603A (en) |
-
1990
- 1990-09-25 JP JP2255924A patent/JPH04132603A/en active Pending
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