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Preparation method of a ternary compound-based flexible porous ceramic composite material

A ternary compound, porous ceramic technology, used in ceramic products, applications, household appliances, etc., can solve the problems of easy wear and reduce the service life of materials, and achieve good workability, good corrosion resistance and strength performance, good The effect of microstructural uniformity

Active Publication Date: 2018-05-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relatively low hardness and inherent layered structure of this material make it easy to wear when subjected to the grinding force of hard particles, reducing the service life of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Mo 2 NiB 2 Powder synthesis: using MoO 3 ,NiO,B 4 C and graphite C powder as raw materials, the following atomic percentage at.% mixture, MoO 3 : 17%, NiO: 9%, B 4 C: 8%, C: 66%. Put the prepared materials into a ball mill for mixing. The ball milling atmosphere is under vacuum protection, the ball-to-material ratio is 3:1, and the ball milling time is 8 hours; the mixed powder is compressed by a cold press forming equipment hydraulic press, and the pressure is controlled at 400MPa; Put the pressed cold compact into a vacuum furnace for reaction sintering, the reaction temperature is 1300℃, the heating rate is controlled at 15℃ / min, the reaction sintering time is 120 minutes, and the vacuum degree is controlled at 10 -3 -10 -2 Pa range; at this stage, the following reactions are carried out:

[0018] 4MoO 3 +2NiO+B 4 C+13C→2Mo 2 NiB 2 +14CO↑

[0019] After the reaction is completed, the temperature is quickly lowered, and the sintered billet is subjected to secondary ball...

Embodiment 2

[0029] 1. Mo 2 NiB 2 Powder synthesis: using MoO 3 ,NiO,B 4 C and graphite C powder as raw materials, the following atomic percentage at.% mixture, MoO 3 : 25%, NiO: 15%, B 4 C: 4%, C: 56%. Put the prepared materials into a ball mill for mixing. The ball milling atmosphere is protected by inert gas, the ball-to-material ratio is 1:1, and the ball milling time is 6 hours; the mixed powder is compressed by a cold forming equipment hydraulic press, and the pressure is controlled at 350MPa ; Put the pressed cold compact into a vacuum furnace for reaction sintering, the reaction temperature is 1000 ℃, the heating rate is controlled at 20 ℃ / min, the reaction sintering time is 60 minutes, and the vacuum degree is controlled at 10 -3 -10 -2 Pa range; at this stage, the following reactions are carried out:

[0030] 4MoO 3 +2NiO+B 4 C+13C→2Mo 2 NiB 2 +14CO↑

[0031] After the reaction is completed, the temperature is rapidly reduced, and the sintered compact is subjected to secondary ball mi...

Embodiment 3

[0041] 1. Mo 2 NiB 2 Powder synthesis: using MoO 3 ,NiO,B 4 C and graphite C powder as raw materials, the following atomic percentage at.% mixture, MoO 3 : 15%, NiO: 6%, B 4 C: 10%, C: 69%. Put the prepared materials into a ball mill for mixing. The ball milling atmosphere is protected by inert gas, the ratio of ball to material is 2:1, and the ball milling time is 7 hours; the mixed powder is compressed by a cold press forming equipment hydraulic press, and the pressure is controlled at 370MPa ; Put the pressed cold compact into a vacuum furnace for reaction sintering, the reaction temperature is 1200℃, the heating rate is controlled at 17℃ / min, the reaction sintering time is 90 minutes, and the vacuum degree is controlled at 10 -3 -10 -2 Pa range; at this stage, the following reactions are carried out:

[0042] 4MoO 3 +2NiO+B 4 C+13C→2Mo 2 NiB 2 +14CO↑

[0043] After the reaction is completed, the temperature is quickly lowered, and the sintered compact is subjected to secondary ...

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Abstract

The invention relates to a preparation method of a ternary compound-based flexible porous ceramic composite material.The method comprises the steps that by atomic percent, 15-25% of Mo2NiB2 powder, 50-60% of Ti3MC2 powder and 15-35% of carbonate are mixed; the mixed materials are placed into a ball mill to be mixed, wherein the ball milling atmosphere is vacuum or inert gas protection, the ratio of grinding media to the materials is 1:1-3:1, and the ball milling time is 6-8 h; the mixed powder is pressed through a cold pressing forming device hydraulic machine, wherein the pressure is controlled to be 350-400 MPa; a formed cold pressing blank is placed into a vacuum furnace for reactive sintering, wherein the reaction temperature is 1200-1400 DEG C, the reactive sintering time is 120-180 min, and the vacuum degree is controlled to be 10<-3>-10<-2> Pa; furnace cooling is performed after the reaction is completed.

Description

Technical field [0001] The invention relates to a method for preparing a ceramic material, in particular to a method for preparing a ternary boride reinforced ternary compound-based flexible porous ceramic composite material. Background technique [0002] Porous materials are one of the important supports for sustainable development and promoting the development of environmentally friendly industries. Porous materials have pores with a certain pore size range, large specific surface area, adsorption capacity and many special properties, which can achieve filtration, separation, throttling, catalytic reaction, sound insulation, heat insulation, shock resistance, and adsorption functions. Used in various fields of medicine, chemical industry, metallurgy, seawater desalination and environmental protection. At present, the porous filter materials that can be used industrially at home and abroad mainly include polymer materials and inorganic materials (including ceramic materials and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/58C04B35/626C04B38/02
CPCC04B35/5615C04B35/5618C04B35/5805C04B35/626C04B38/02C04B2111/2084C04B2235/3256C04B2235/3279C04B2235/38C04B2235/3821C04B2235/422C04B2235/425C04B2235/428C04B2235/9669C04B2235/9684
Inventor 江垚贺跃辉王重贺康希越
Owner CENT SOUTH UNIV
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