The method for preparing ticn powder with tioso4 and starch as titanium source and carbon source respectively

Abstract

The invention discloses a method for preparing TiCN powder by using TiOSO4 and starch as titanium source and carbon source respectively. Add TiOSO4 and starch into deionized water at a mass ratio of 1:4~10 and mix evenly, and dry the mixture at 100~150°C for 24~48 hours to obtain a precursor; the precursor is protected under a nitrogen atmosphere or an ammonia decomposition atmosphere Heating to 1300~2000°C, keeping it warm for 1~2 hours to carry out carbothermal reduction and nitriding to obtain TiCN powder; the purity of the chemical reagents and raw materials are analytical purity and above; the prepared TiCN powder The composition of the product is controlled by the ratio of added raw materials, and the purity and particle size are determined by the order of addition and the preparation process. The method of the invention prepares high-purity and ultrafine TiCN at low cost. Compared with the traditional method for preparing TiCN, the method has the characteristics of uniform raw material mixing, simple process, low synthesis temperature, short synthesis time, energy saving and environmental protection, and the like.

Description

technical field [0001] The invention belongs to the technical field of TiCN powder preparation, in particular to a TiOSO 4 and starch as titanium source and carbon source to prepare TiCN powder. Background technique [0002] TiCN has the characteristics of high melting point, high hardness, high wear resistance and special functionality. It is not only widely used in abrasive tools, cutting tools and reinforcements of composite materials, but also as an energy material. The material has broad application prospects. [0003] The development of modern energy industry urgently needs ultra-fine TiCN powder. Traditional TiO 2 After mixing with carbon solid phase, high temperature reduction synthesizes TiCN powder, which is cheap but the prepared powder is relatively coarse; at present, ultrafine TiCN powder is mainly made of pure titanium, titanium organic matter or gaseous titanium compound, and is processed by vapor deposition, plasma heating and other processes. The high c...

AI Technical Summary

Problems solved by technology

However, the uniformity of raw materials is poor through mechanical mixing; TiCN is also easily oxidized

As far as the current production technology is concerned, the synthesized powder cannot fully meet the requirements of fine ceramics in terms of particle size and purity.

[0008] There are other methods to prepare ultra-fine TiCN, but generally speaking, there are high raw material requirements such as high-purity metal titanium powder, organic compounds of titanium, etc.; synthesis process Complicated, such as plasma heating, microwave heating, vapor deposition, etc., high equipment requirements, complex preparation methods or processes, or limited output, resulting in high costs