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Preparation method of titanium boride powder

A technology of powder preparation and titanium boride, applied in the direction of boron/boride, metal boride, etc., can solve the problems of complex steps, low production efficiency, high cost, etc., and achieve the effect of simple steps, less impurity residue, and low equipment requirements

Active Publication Date: 2018-12-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the shortcomings of complex steps, low production efficiency and high cost in the prior art titanium boride powder preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 Using the method of the present invention to prepare TiB 2 powder

[0041] TiCl with a purity greater than 99.98% 4 、BCl 3 Each 1.62Kg and 2.00Kg are mixed, and heated to 500 degrees Celsius for later use.

[0042] Mg, MgCl with a purity greater than 99.99% 2 Each 2.25Kg and 8.94Kg are mixed and heated to 800 degrees Celsius; the MgCl2 and Mg mixtures are protected with argon and stirred at a stirring speed of 20rpm.

[0043] gaseous TiCl 4 、BCl 3 The mixture is added at a rate of 0.1Kg / min into a closed carbon steel tank reaction vessel with a pressure relief function of 10L in volume for reaction, and the MgCl at the bottom of the vessel is passed into 2 in molten salt. During the reduction reaction, the reaction vessel is forcibly cooled by blowing air, and the temperature of the reactor system is controlled at 780-800 degrees Celsius; when the pressure of the reactor is greater than 20KPa, the pressure is released; until the reaction is fully com...

Embodiment 2

[0045] Example 2 Preparation of TiB using the method of the present invention 2 powder

[0046] TiCl with a purity greater than 99.98% 4 、BCl 3 Each 1.62Kg and 2.00Kg are mixed, and heated to 500 degrees Celsius for later use.

[0047] Mg, MgCl with a purity greater than 99.99% 2 Each 2.25Kg and 8.94Kg are mixed and heated to 800 degrees Celsius; the MgCl2 and Mg mixtures are protected with argon and stirred at a stirring speed of 30rpm.

[0048] gaseous TiCl 4 、BCl 3 Add it into a reaction vessel with a volume of 10L at a rate of 0.05Kg / min, and pass into the MgCl at the bottom of the vessel 2 in molten salt. During the reduction reaction process, the reaction vessel is forcibly cooled by blowing air, and the temperature of the reaction system is controlled to 750-780 degrees Celsius. When the pressure of the reactor is greater than 20KPa, it is depressurized; until the reaction is fully completed to obtain the reduced product at the bottom of the closed carbon steel ...

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Abstract

The invention belongs to the field of titanium material preparation, and particularly relates to a preparation method of titanium boride powder. The technical problem to be solved are complicated steps, low production efficiency and high cost of a titanium boride powder preparation method in the prior art. The technical scheme of the invention is to provide a method for preparing the titanium boride powder, comprising the following steps: by using TiCl4 and BCl3 as raw materials, magnesium metal as a reducing agent, and magnesium chloride as a reaction medium, introducing a gaseous mixture ofTiCl4 and BCl3 into molten salt formed by heating a mixture of magnesium metal and magnesium chloride, and performing one-step synthesis by a magnesium thermal reduction method to prepare the TiB2 powder. The method has the advantages of simple steps, low equipment requirements, no use of high-cost raw materials such as titanium powder and boron powder, and capability of significantly reduing theproduction cost. Moreover, a product obtained by the method is high in purity, less in impurity residual and proper in particle size, and has good application prospect.

Description

technical field [0001] The invention belongs to the field of titanium material preparation, and in particular relates to a preparation method of titanium boride powder. Background technique [0002] Titanium boride (TiB 2 ) is a new type of multifunctional material, which has the advantages of high strength, high hardness, high temperature resistance, acid and alkali corrosion resistance, wear resistance, good electrical conductivity, thermal conductivity, etc., and is widely used in the preparation of cermets, cutting tools, Molds, crucibles for melting metals, as a reinforcing phase for composite materials. In addition, titanium boride has high melting point, good conductivity, high temperature resistance, corrosion resistance to molten aluminum and cryolite, making it an ideal material for aluminum electrolysis cathodes. [0003] At present, the preparation methods of titanium boride mainly include direct synthesis, carbothermal reduction, metallothermal reduction, and ...

Claims

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Application Information

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IPC IPC(8): C01B35/04
CPCC01B35/04C01P2004/62C01P2006/80
Inventor 盛卓李开华李亮苗庆东
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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