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Combustion synthesis method of sub-micron titanium carbide nitride powder

A titanium carbonitride, submicron technology, applied in the field of synthesis technology of submicron titanium carbonitride powder materials, can solve the problems of easy introduction of impurities, long production cycle and high raw material cost

Inactive Publication Date: 2005-11-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a submicron titanium carbonitride powder to solve the problems of long production cycle, high energy consumption, high cost of raw materials, difficulty in meeting the needs of industrial production, and easy introduction of impurities in the prior art. combustion synthesis method

Method used

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specific Embodiment approach 1

[0004] Specific embodiment one: the method of this embodiment is realized according to the following steps: 1. Basic raw materials and diluents are batched, and the basic raw materials are: titanium dioxide: 55% ~ 62%, magnesium powder: 20% ~ 40%. %, carbon black: 0% to 20%, the diluent is titanium carbonitride powder, and the weight is 0 to 2.3 times that of the basic raw material; 2. Dry the basic raw material and the The mixture of diluent is put into the mixing tank, and mixed by mechanical ball milling for 1200-1500 minutes; 3. Put the uniformly mixed powder into the graphite boat, and then put it into a high-pressure container. The reactor is cooled by circulating water, and the pressure of filling nitrogen is 0 ~ 15Mpa, ignite to make it self-propagating reaction, the ignition uses Ni-Cr wire, the igniter is a mixture of pure Ti powder and carbon black with a particle size of less than 300 mesh; 4. Take out the product after cooling, the product is titanium carbonitride ...

specific Embodiment approach 2

[0005] Specific embodiment two: the raw material of this embodiment is made up of basic raw material and diluent, and the percentage by weight of each component in the basic raw material is: titanium dioxide: 60%, magnesium powder: 40%, the diluent weight that adds is 0% of the basic raw material ~2.3 times, the reaction nitrogen pressure is 0, and the obtained product is pure titanium powder (Ti). With the change of diluent content, the average particle size can vary from 0.1 μm to 10 μm, and the content of C and N in the product fluctuates slightly. Other methods and steps are the same as those in the first embodiment.

specific Embodiment approach 3

[0006] Specific embodiment three: the raw material of this embodiment is made up of basic raw material and diluent, and the percentage by weight of each component in the basic raw material is: titanium dioxide: 60%, magnesium powder: 40%, the diluent weight that adds is 0% of the basic raw material ~2.3 times, the reaction nitrogen pressure is 10Mpa, and the obtained product is titanium nitride powder (TiN 0.97 ), with the change of diluent content, the average particle size can vary from 0.1 μm to 10 μm, and the content of C and N in the product fluctuates slightly. Other methods and steps are the same as those in the first embodiment.

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Abstract

Disclosed is a combustion synthesis method of sub-micron titanium carbide nitride powder which comprises proportioning base raw material and thinning agent, the base material includes titanium oxide 55-62%, magnesite powder 20-40%, carbon black 0-20%, the thinning agent is carbon azotized titanium powder, the weight of the thinning agent is 0-2.3 times of the base raw material. The preparation process comprises high temperature drying, ball grinding, mixing homogeneously, cooling down with circulating water, reacting at the presence of nitrogen, cooling down and acid-washing, water scrubbing, filtering and drying to obtain the end product.

Description

Technical field: [0001] The invention relates to a synthesis process of a submicron titanium carbonitride powder material. Background technique: [0002] The methods for preparing titanium carbonitride (Ti(C,N)) powder usually include: high temperature nitriding method, titanium dioxide (TiO 2 ) carbothermal reduction method, high-temperature diffusion method of titanium carbide and titanium nitride, self-propagating high-temperature synthesis-element method, ammonolysis method, mechanical alloying method, chemical vapor deposition method, sol-gel method, etc. The high-temperature nitriding method uses titanium carbide (TiC) powder and titanium (Ti) powder as raw materials, and after mixing, carries out long-term carbonitriding treatment under high temperature and nitrogen conditions to form Ti (C, N) powder; TiO 2 TiO 2 Powder and carbon (C) powder are used as raw materials, and Ti (C, N) powder is synthesized by high-temperature reduction in nitrogen; the high-temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58
Inventor 赫晓东郑永挺鲍春燕
Owner HARBIN INST OF TECH
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