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Method for rapidly preparing zirconium carbide ceramics powder

A technology of ceramic powder and zirconium carbide, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of large particle size, high oxygen content in general, and insufficient purity of zirconium carbide powder, and achieve crystal grain Uniform fineness, high purity, shortened synthesis time

Inactive Publication Date: 2010-09-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The zirconium carbide powder prepared by the prior art is not pure enough, the oxygen content is generally high, and the particle size is large

Method used

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  • Method for rapidly preparing zirconium carbide ceramics powder
  • Method for rapidly preparing zirconium carbide ceramics powder
  • Method for rapidly preparing zirconium carbide ceramics powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve 7g of sucrose in 50mL of solvent acetic acid at a temperature of 75°C, and cool the resulting solution to room temperature to obtain a carbon source solution (used as a carbon source); dilute 8mL of zirconium n-propoxide solution with 8mL of n-propanol Afterwards, place in a constant temperature water bath at 20°C and stir for 10 minutes, add 1 mL of chelating agent acetic acid to the mixture, and stir for 15 minutes to make it evenly mixed. Measure the carbon source solution according to the mass ratio of zirconium n-propoxide to sucrose 12:4.6, dilute it with 24mL of n-propanol, add 1mL of H 2 O in the diluted carbon source to obtain a carbon source mixed solution; then add the carbon source mixed solution dropwise to the high-speed stirred zirconium n-propoxide mixed solution, stir for 2 days at 20°C, mix well, and after 1 day After aging, a dark red gel was obtained, and then dried in a drying oven at 80° C. for 48 hours, and dry-milled for 0.5 hours to...

Embodiment 2

[0034] (1) Dissolve 7.5g of sucrose in 50mL of solvent acetic acid at a temperature of 80°C, and cool the resulting solution to room temperature to obtain a carbon source solution (used as a carbon source); mix 8mL of zirconium n-propoxide solution with 32mL of n-propanol After dilution, place it in a constant temperature water bath at 25°C and stir for 10 minutes, add 2 mL of chelating agent acetic acid to the mixture, and stir for 15 minutes to make it evenly mixed to obtain a zirconium n-propoxide mixture; press zirconium n-propoxide The mass ratio of sucrose to sucrose is 12:4. Measure the carbon source solution and dilute it with 24mL of n-propanol, add 2mL of H 2 O in the diluted carbon source to obtain a carbon source mixed solution; then add the carbon source mixed solution dropwise to the high-speed stirred zirconium n-propoxide mixed solution, stir for 7 days at 25°C, and mix well, after 7 days After aging, a dark red gel was obtained, and then dried in a drying oven...

Embodiment 3

[0038] (1) Dissolve 8g of sucrose in 50mL of solvent acetic acid at a temperature of 85°C, and cool the resulting solution to room temperature to obtain a carbon source solution (used as a carbon source); dilute 8mL of zirconium n-propoxide solution with 48mL of n-propanol Finally, place it in a constant temperature water bath at 30°C and stir for 10 minutes, add 2 mL of chelating agent acetic acid to the mixed solution, and stir for 15 minutes to make it evenly mixed to obtain a mixed solution of zirconium n-propoxide; press zirconium n-propoxide and The mass ratio of sucrose is 12:5. Measure the carbon source solution, dilute it with 16mL of n-propanol, add 4mL of H 2 O in the diluted carbon source to obtain a carbon source mixed solution; then add the carbon source mixed solution dropwise to the high-speed stirred zirconium n-propoxide mixed solution, stir for 3 days at 30°C, mix well, and after 1 day After aging, a deep red gel was obtained, and then dried in a drying oven...

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Abstract

The invention relates to a preparation method of zirconium carbide ceramics powder; the method for rapidly preparing zirconium carbide ceramics powder is characterized in that: the method comprises the following steps: 1) raw material selection: the raw materials are selected according to 12:4-12:5 of mass ratio of zirconium propoxide solution and sugar and 8:32:1:1-8:64:2:4 of volume ratio of zirconium propoxide solution, normal propyl alcohol, chelant-acetic acid and water; the solvent acetic acid is selected according to (7-8)g:50ml of proportion of the sugar and the solvent acetic acid; 2) the preparation of dried gel power; 3) preparation of precursor powder; 4) heat treatment of the precursor powder; carbothermal reduction reaction is carried out under the conditions of high heating rate and short temperature preservation time, the synthesizing process of the zirconium carbide powder is shortened into dozens of minutes even several minutes, so as to obtain high-purity and refined zirconium carbide ceramics powder with good sintering character; single zirconium carbide phase can be analyzed by X-ray diffraction, the oxygen content in the product is 0.5-3 percent, and the free carbon content is from 0.2 to 2 percent; the crystal particles are uniform and tiny, and the mean grain size is less than 500nm.

Description

technical field [0001] The invention relates to a preparation method of zirconium carbide ceramic powder. Background technique [0002] Zirconium carbide is a relatively common substance in carbide materials, and it is also a research hotspot in non-oxide ceramic materials in recent years. Zirconium carbide is the raw material for the production of atomic-level zirconium sponge, which can be used as an additive for advanced refractory materials; zirconium carbide ceramics are superhard materials with good chemical stability, good high temperature resistance, corrosion resistance and wear resistance, and are good high temperature Structural materials, superhard tool materials and surface protection materials, and it also has excellent thermal conductivity, and has potential application value in cutting tool materials, armor materials, surfacing wear-resistant electrodes, etc. [0003] In recent years, high temperature gas-cooled reactor (HTGR) has become one of the new gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/30C04B35/56C01B32/914
Inventor 王玉成解晶晶傅正义王为民王皓张金咏张清杰
Owner WUHAN UNIV OF TECH
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