Method for synthesizing Cr2AlC ceramic powder
A technology of ceramic powder and microwave synthesis, which is applied in the preparation of inorganic ceramic powder synthesized by microwave heating, and in the field of Cr2AlC ceramic powder material synthesized by microwave heating, which can solve the problems of high energy consumption, long reaction time, environmental pollution, etc., and achieve distribution Uniformity, short preparation time, and shortened reaction time
Inactive Publication Date: 2014-07-02
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
And in the synthesis of high-purity Cr 2 There are few reports on AlC ceramic powder
In 2006, the Chinese invention patent (CN1884064A) reported a method of preparing Cr by molten salt method. 2 The method of AlC powder, but the synthetic powder contains Cr 7 C 3 and Cr 2 Al impurity phase, and the post-treatment of the salt used in the reaction process will pollute the environment
Either pollute the environment, or the reaction time is longer and the energy consumption is higher
Method used
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Embodiment 1
[0017] Example 2:
Embodiment 2
[0019] Example 3:
Embodiment 3
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The invention discloses a preparation method for synthesizing Cr2AlC ceramic powder by using microwaves. The method is characterized by comprising the following steps: preparing chromium powder, aluminum powder and chromium carbide powder in the molar ratio of 1:(2.0-2.2):1; mixing uniformly and tableting; performing microwave heating under the protection of inert gas which does not undergo any chemical reaction with raw materials and a reaction product to synthesize high-purity Cr2AlC ceramic powder. Through the method, Cr2AlC ceramic powder can be prepared rapidly, and the reaction time is shortened greatly. Compared with the conventional preparation method of Cr2AlC ceramic powder, the efficiency is increased by dozens of times, and meanwhile a good single-phase sample is obtained.
Description
technical field [0001] The invention provides a preparation method for microwave heating synthesis of inorganic ceramic powder, in particular to a method for microwave heating synthesis of Cr 2 An AlC ceramic powder material belongs to the field of non-oxide ceramic powder preparation. Background technique [0002] Cr 2 AlC is M n+1 AX n (n=1,2,3) A typical representative of the "211" phase in ternary layered compounds, which belongs to the hexagonal crystal system, has excellent high thermal conductivity and high electrical conductivity similar to metals, and has good resistance corrosion performance. Therefore, Cr 2 AlC is the preferred material for a new generation of high-temperature electrodes. At the same time Cr 2 AlC also has the high strength of ceramics and good high temperature oxidation resistance. Therefore, Cr 2 As a high-temperature anti-oxidation and corrosion-resistant ceramic component and protective coating, AlC has broad application prospects in ...
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IPC IPC(8): C04B35/56C04B35/626
Inventor 关春龙刘国勤王春华赵志伟李彦涛张子平程巧换祁颖
Owner HENAN UNIVERSITY OF TECHNOLOGY