High temperature and high pressure preparation of a conventional superconductor material tungsten phosphide (wp)

A technology of superconductor and tungsten phosphide, which is applied in conventional superconductor material WP, conventional superconductor material WP and its high-temperature and high-pressure preparation field. The effect of high yield and low porosity

Active Publication Date: 2022-01-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional preparation method takes a long time and the samples prepared under normal pressure are prone to phosphorus deficiency, poor hardness and difficulty in densification.

Method used

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  • High temperature and high pressure preparation of a conventional superconductor material tungsten phosphide (wp)
  • High temperature and high pressure preparation of a conventional superconductor material tungsten phosphide (wp)
  • High temperature and high pressure preparation of a conventional superconductor material tungsten phosphide (wp)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Take α-phase tungsten powder and red phosphorus powder with a cubic structure with a molar ratio of 1:1 as the initial raw materials, grind the selected raw materials according to the standard of grinding 120 minutes per 1 g of material on average, and pre-press them under a pressure of 10 MPa The cylinder is obtained, and then put into the hBN tube in the pyrophyllite synthesis block. The upper and lower ends of the hBN tube are sealed with hBN sheets to form an hBN column, and then the hBN column is put into the graphite tube, and the upper and lower ends of the graphite tube are assembled with graphite sheets in sequence to form It is the ink column, and then the graphite column is placed in the dolomite tube, and the dolomite sheet, the molybdenum sheet and the conductive steel ring with the graphite column in the middle are assembled at both ends of the dolomite tube. After assembling, put the synthesis block into the synthesis chamber of the large press,...

Embodiment 2

[0024] Example 2: Take α-phase tungsten powder and red phosphorus powder with a cubic structure with a molar ratio of 1:1 as the initial raw materials, grind the selected raw materials according to the standard of 120 min per 1 g of material, and pre-press them under a pressure of 10 MPa The cylinder is obtained, and then put into the hBN tube in the pyrophyllite synthesis block. The upper and lower ends of the hBN tube are sealed with hBN sheets to form an hBN column, and then the hBN column is put into the graphite tube, and the upper and lower ends of the graphite tube are assembled with graphite sheets in sequence to form It is the ink column, and then the graphite column is placed in the dolomite tube, and the dolomite sheet, the molybdenum sheet and the conductive steel ring with the graphite column in the middle are assembled at both ends of the dolomite tube. After assembling, put the synthesis block into the synthesis chamber of the large press, press at a temperature ...

Embodiment 3

[0025] Example 3: Take α-phase tungsten powder and red phosphorus powder with a cubic structure with a molar ratio of 1:1 as the initial raw materials, grind the selected raw materials according to the standard of 120 min per 1 g of material, and pre-press them under a pressure of 10 MPa The cylinder is obtained, and then put into the hBN tube in the pyrophyllite synthesis block. The upper and lower ends of the hBN tube are sealed with hBN sheets to form an hBN column, and then the hBN column is put into the graphite tube, and the upper and lower ends of the graphite tube are assembled with graphite sheets in sequence to form It is the ink column, and then the graphite column is placed in the dolomite tube, and the dolomite sheet, the molybdenum sheet and the conductive steel ring with the graphite column in the middle are assembled at both ends of the dolomite tube. After assembling, put the synthesis block into the synthesis cavity of the large press, press at a temperature o...

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Abstract

The invention discloses a high temperature and high pressure synthesis method of conventional superconductor material tungsten phosphide (WP) crystal. The invention mainly relates to a WP crystal having catalytic performance and superconducting performance, and belongs to the field of conventional superconducting materials. Mix tungsten powder and red phosphorus powder according to the molar ratio of 1:1 to 1:4, grind and mix them evenly. Synthetic WP material. For the first time, the present invention uses a high temperature and high pressure method to prepare WP sintered blocks and large-size single crystals with superconducting properties, which have the characteristics of high crystallinity, high density, stable structure, environmental friendliness, low cost, and high synthesis efficiency. . Because of its simple preparation process and great application potential, it can be used as HDS&HDN catalytic materials, and it is also the first superconductor in the phosphide series with MnP structure, which has played a good role in the research of other materials in the phosphide series.

Description

technical field [0001] The invention relates to a conventional superconducting material WP, in particular to a conventional superconducting material WP and a high-temperature and high-pressure preparation method thereof, belonging to the field of conventional superconducting materials. Background technique [0002] WP is a transition metal phosphide that combines the higher hardness (11 GPa) of ceramic compounds with the transport properties of metals, such as thermal and electrical conductivity, to exhibit remarkable catalytic performance, especially for HDS and HDN. In addition, WP is also a weakly coupled BCS superconductor material, which is the first superconductor discovered with a transition metal phosphide MnP structure. The volatile nature makes it difficult to synthesize pure-phase WP by conventional means. This exploration process is not only time-consuming but also WP grown under normal pressure is likely to have many defects (such as phosphorus deficiency, etc.)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B1/12C30B28/02C30B29/10B01J3/04H01B12/00
CPCC30B1/12C30B28/02C30B29/10B01J3/04H01B12/00
Inventor 彭放向晓君梁浩
Owner SICHUAN UNIV
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