Novel superconducting material

A superconducting material and a new type of technology, applied in inorganic chemistry, non-metallic elements, selenium/tellurium compounds, etc., can solve the problems of low phase purity, low critical current density, poor grain connectivity, etc., to improve phase purity, improve Effect of crystal connection performance

Inactive Publication Date: 2016-05-04
常熟市东方特种金属材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing iron-based superconducting materials have problems such as low critical current density, poor grain connectivity and low phase purity, which greatly limit their practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh and mix iron powder, arsenic powder, selenium, potassium and rare earth elements in the ratio of 1:1:0.3:0.1:0.05 respectively, put them into a wear-resistant ball mill jar, and then put the ball mill jar into a high-temperature energy ball ink machine, Under the protection of a high-purity argon protective atmosphere, ball milling was carried out at a temperature of 80°C for 1 hour; then, under an argon atmosphere, the mixed powder after ball milling was poured into a mold and pressed into a block; finally, the block was packaged in The quartz tube was evacuated, and sintered under the pressure of 0.02 MPa under an argon protective atmosphere, and sintered for 10 hours after rising to 800°C at a heating rate of 8°C / min.

Embodiment 2

[0015] Weigh and mix iron powder with a purity greater than 99.9%, arsenic powder with a purity greater than 99.9%, selenium powder with a purity greater than 99.9%, potassium and rare earth elements in a ratio of 1:1.2:0.2:0.2:0.03, and put them into a wear-resistant ball mill jar , and then put the ball mill jar into a high-temperature energy ball ink machine, and under the protection of a high-purity argon protective atmosphere, perform ball milling at a temperature of 80°C for 1 hour; then, under an argon atmosphere, pour the mixed powder after ball milling into Press it into a block in a mold; finally package the block in a quartz tube to evacuate it, and sinter it under the argon protective atmosphere at a pressure of 0.03MPa, and then sinter it at a heating rate of 8°C / min to 900°C. 10 hours.

Embodiment 3

[0017] Weigh and mix iron powder, arsenic powder, selenium, potassium and rare earth elements in the ratio of 1:0.8:0.1:0.3:0.02 respectively, put them into a wear-resistant ball mill jar, and then put the ball mill jar into a high-temperature energy ball ink machine, Under the protection of a high-purity argon protective atmosphere, ball milling was carried out at a temperature of 80°C for 1 hour; then, under an argon atmosphere, the mixed powder after ball milling was poured into a mold and pressed into a block; finally, the block was packaged in The quartz tube was evacuated, and sintered under the pressure of 0.03 MPa under an argon protective atmosphere, and the temperature was raised to 750° C. at a rate of 8° C. / min, and then sintered for 12 hours.

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PUM

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Abstract

The present invention discloses a novel superconducting material, which is prepared from the following main components: iron, arsenic, selenium, potassium and rare earth elements in the molar ratio of 1:0.8-1.2:0.1-0.4:0.1-0.4:0.01-0.05. The preparation method of the novel superconducting material can improve the phase purity and crystal connection performance of the iron-based superconductors.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a novel superconducting material. Background technique [0002] Superconductivity is one of the most amazing phenomena in the physical world. Generally, the resistance of superconducting alloys drops to zero when it is close to absolute zero and enters the superconducting state. High-temperature superconductivity means that the resistance of a material suddenly drops to zero at a relatively high critical temperature. It has a completely different physical mechanism and a wider range. application prospects. In 1986, physicists discovered the cuprate high-temperature superconductor, which won the Nobel Prize in Physics the following year. Since then, scientists have never stopped exploring new high-temperature superconducting materials. While pursuing higher critical temperatures, physicists have been working hard to reveal the mechanism. At present, almost all developed coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/00
CPCC01B19/002
Inventor 朱正良
Owner 常熟市东方特种金属材料厂
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