Synthesis method for Ti3SiC2 powder

Abstract

The invention provides a synthesis method for Ti3SiC2 powder. The synthesis method comprises the following steps of S1: mixing materials: evenly mixing raw materials and mixed fused salt at a ratio toobtain mixed powder, wherein the raw materials are the mixture of Ti powder, Si powder and C powder, and the mixed fused salt is the mixture of KCl powder and NaF powder; S2: calcining: calcining themixed powder obtained in the S1 to obtain a calcined material; S3: washing: washing the calcined material obtained in S2 to obtain a washed material; S4: drying: drying the washed material obtained in S3 to obtain Ti3SiC2 powder. The synthesis method has the effects that synthesis steps are greatly simplified, a production process is shortened, cost is lowered, technological parameters can be easily controlled, industrialization can be easily realized, the shape and the size of a powder product grain can be effectively controlled, and the dispersibility and the purity of the powder are improved.

Description

technical field [0001] The present invention relates to the field of inorganic non-metallic technology, in particular, relates to a kind of Ti 3 SiC 2 Synthesis method of powder. Background technique [0002] In recent years, the ternary layered carbide M n+1 AX n (where n=1,2,3; M stands for transition metal, A stands for IIIA or IVA element, X stands for C or N) has gained more and more attention, such as Ti 3 SiC 2 、Ti 3 AlC 2 、Ti 2 AlC, Cr 2 AlC, etc. are typical representatives of such carbides. This kind of carbide has both the excellent properties of metal and ceramics, such as good electrical and thermal conductivity at room temperature, good thermal shock resistance, easy processing and high-temperature plasticity; at the same time, it has excellent properties of ceramics, Such as high melting point, high thermal stability, good oxidation resistance and corrosion resistance, etc. Among such ternary layered carbides, titanium silicon carbon ceramics (Ti 3...

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Problems solved by technology

[0007] However, there are deficiencies in the above methods. For example, in the process of synthesizing powders by chemical vapor deposition, the synthesis temperature and reaction degree are difficult to control, resulting in impurities such as TiC and SiC in the prepared powders; In the solidification process, products with high purity and good compactness can be obtained, but the preparation cost is relatively high

The molten salt method used by Guo Xue, Yang Shiyuan, etc. is prepared under vacuum conditions, the process conditions are very harsh, and it is difficult to realize industrialization

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