A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for preparing high-purity aluminum nitride through auto-catalysis
Abstract The present disclosure discloses a method for preparing high-purity AIN through auto-catalysis and belongs to the technical field of synthesis of AIN. The method includes the following steps of: (1) mixing of materials: uniformly mixing aluminum hydroxide powder, carbon powder and AIN powder as raw materials according to a certain weight ratio to obtain a material mixture; (2) high-temperature synthesis: subjecting the material mixture to reaction in a mixed gas flow of nitrogen and propane at a certain pressure for 1.5 h to 3 h at 13500C to 14200C to obtain a reaction product; and (3) decarbonization: decarbonizing the reaction product to obtain AIN powder. According to the method for preparing high-purity AIN through auto-catalysis of the present disclosure, the AIN is used as seed crystal, and the reaction is conducted in the mixed gas flow of the nitrogen and the propane at a certain pressure. Therefore, thermal motion of reactive molecules is enhanced, diffusion rate and permeation rate are increased, an auto-catalysis effect is achieved, the reaction synthesis time is shortened, and the temperature for reaction synthesis is lowered by 2000 C to 4000 C. Moreover, pollution caused by impurity elements introduced by adding other additives is avoided, and therefore the purity of the prepared AIN is guaranteed.
Method for preparing high-purity aluminum nitride through auto-catalysis
Abstract The present disclosure discloses a method for preparing high-purity AIN through auto-catalysis and belongs to the technical field of synthesis of AIN. The method includes the following steps of: (1) mixing of materials: uniformly mixing aluminum hydroxide powder, carbon powder and AIN powder as raw materials according to a certain weight ratio to obtain a material mixture; (2) high-temperature synthesis: subjecting the material mixture to reaction in a mixed gas flow of nitrogen and propane at a certain pressure for 1.5 h to 3 h at 13500C to 14200C to obtain a reaction product; and (3) decarbonization: decarbonizing the reaction product to obtain AIN powder. According to the method for preparing high-purity AIN through auto-catalysis of the present disclosure, the AIN is used as seed crystal, and the reaction is conducted in the mixed gas flow of the nitrogen and the propane at a certain pressure. Therefore, thermal motion of reactive molecules is enhanced, diffusion rate and permeation rate are increased, an auto-catalysis effect is achieved, the reaction synthesis time is shortened, and the temperature for reaction synthesis is lowered by 2000 C to 4000 C. Moreover, pollution caused by impurity elements introduced by adding other additives is avoided, and therefore the purity of the prepared AIN is guaranteed.
Method for preparing high-purity aluminum nitride through auto-catalysis
TIAN YUWEI (author) / XU YONGBIN (author) / XU SHIMING (author)
2021-04-22
Patent
Electronic Resource
English
Method and device for preparing high-purity aluminum nitride nano powder
| European Patent Office | 2024
Preparation method of high-purity aluminum nitride powder
| European Patent Office | 2023
Preparation method of high-purity boron nitride for sintering aluminum nitride substrate
| European Patent Office | 2020
High-purity aluminum nitride powder and batch preparation method thereof
| European Patent Office | 2024
Method for preparing aluminum nitride ceramic through injection molding
| European Patent Office | 2023