Method for preparing TiCN powder by using TiOSO4 and starch as Ti source and C source respectively

Abstract

The invention discloses a method for preparing TiCN powder by using TiOSO4 and starch as a Ti source and a C source respectively. The method comprises the following steps of: adding TiOSO4 and starch into ionized water and uniformly mixing, wherein the mass ratio of TiOSO4 to starch is 1:(4-10); drying the mixed liquid at 100-150 DEG C for 24-48 hours to obtain a precursor; heating the precursor to 1300-2000 DEG C in the presence of a nitrogen atmosphere or ammonia decomposition atmosphere; preserving heat for 1-2 hours and carrying out carbon thermal reduction and nitridation to obtain the TiCN powder. The purities of the used chemical reagents and raw materials are analytically pure or above, the components of the prepared TiCN powder are controlled by the ratio of the added raw materials, and the purity and granularity of the TiCN powder are determined jointly by the material adding sequence and the preparation process. High-purity superfine TiCN can be prepared at low cost by using the method. Compared with the traditional preparation method of TiCN, the method provided by the invention has the characteristics of high uniformity of mixed raw materials, simple process, low synthesis temperature, short synthesis time, energy conservation, environmental friendliness 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 mainly uses pure titanium, titanium organic matter or gaseous titanium compound as raw material, and is processed by vapor deposition, plasma heating and other processes. ...

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