Iron-based oxide superconducting material and preparation method thereof

A technology of iron-based oxides and superconducting materials, which is applied in the field of iron-based oxide superconducting materials and their preparation, can solve problems such as lack of consensus, and achieve the effects of easy procurement, elimination of magnetism, and enhanced superconducting properties

Inactive Publication Date: 2020-03-27
河北环亚线缆有限公司
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Problems solved by technology

[0005] However, until today, the physics community has not yet reached a consensus on the high-temperature superconducting mechanism of copper...

Method used

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Embodiment Construction

[0018] An iron-based oxide superconducting material, with iron as the base material, a mixture of elements niobium, germanium, selenium, nickel, iron, fluorine, and oxygen, composed according to molecular weight: Nb2Ge1Se1Ni3Fe3F2O14; the mixture is Nb2O5, GeO2, SeO3, Ni3O2, Fe3O4 compound and F2 gas, Nb2O5, GeO2, SeO3, Ni3O2, Fe3O4 compound ratio combination sequence is: 0.2:0.6:2:2:5.2, using solid state reaction method to prepare super body powder raw material, the raw material is super The conduction critical temperature (Tc) reaches 57K.

[0019] A method for preparing an iron-based oxide superconducting material. Firstly, Nb2O5, GeiO2, SeO3, Ni3O2 and Fe3O4 compounds are mixed according to the ratio of 0.2:0.6:2:2:5.2, and are evenly stirred by a double-helix conical mixer. use;

[0020] Put the mixed Nb2O5, GeiO2, SeO3, Ni3O2 and Fe3O4 compounds in a high-temperature and high-pressure sintering furnace with a pressure of 15GPa and a temperature of 1600°C. Set the tempe...

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Abstract

The invention discloses an iron-based oxide superconducting material and a preparation method thereof. The iron-based oxide superconducting material Nb2Ge1Se1Ni3Fe3F2O14 is composed of iron as a basematerial and mixtures composed of niobium, germanium, selenium, nickel, iron, fluorine and oxygen according to a molecular weight group. The mixtures are respectively Nb2O5, GeO2, SeO3, Ni3O2, Fe3O4 compounds and F2 gas, and the proportion combination sequence of the Nb2O5, GeO2, SeO3, Ni3O2 and Fe3O4 compounds is 0.2 : 0.6 : 2 : 2 : 5.2. The critical superconducting temperature of the niobium-germanium (Nb3Ge) alloy reaches 25K, the niobium-germanium (Nb3Ge) alloy doped with iron, nickel and selenium oxides is sintered and ground at high temperature and high pressure, fluorine (F2) is introduced for sintering and grinding at high temperature and high pressure, the superconducting critical temperature (Tc) of the obtained powder material is 57K, and the current iron-based superconductor critical temperature 50K is broken through.

Description

technical field [0001] The invention relates to the technical field of superconducting materials, in particular to an iron-based oxide superconducting material and a preparation method thereof. Background technique [0002] Following copper-based superconducting materials, Japanese and Chinese scientists have recently reported the discovery of a new class of high-temperature superconducting materials—iron-based superconducting materials. The US "Science" magazine website reported that the physics community believes that this is a "significant progress" in the field of high-temperature superconductivity research. [0003] In the past few years, the research team of the Institute of Physics of the Chinese Academy of Sciences and the University of Science and Technology of China, represented by Zhao Zhongxian, Chen Xianhui, Wang Nanlin, Wen Haihu, and Fang Zhong, because of the discovery of iron-based high-temperature superconductors above 40K and the research on some basic phy...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/645
CPCC04B35/2666C04B35/645C04B2235/3251C04B2235/3279C04B2235/3287C04B2235/34C04B2235/46
Inventor 曹奎红马江飞马立明马曼昆曹琰
Owner 河北环亚线缆有限公司
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