Synthesis of Al4SiC4 powders from kaolin grog, aluminum and carbon black by carbothermal reaction

2nd International Conference on Competitive Materials and Technological Processes

Yuan, Wenjie^1 ; Yu, Chao^1 ; Deng, Chengji^1 ; Zhu, Hongxi^1

State Key Laboratory Breeding Base of Refractories and Ceramics, Wuhan University of Science and Technology, Wuhan 430081, China^1

关键词: Argon atmospheres;    Carbothermal reactions;    Elemental compositions;    Hexagonal plates;    Low costs;    Natural oxides;    Synthesis route;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/47/1/012058/pdf
DOI  :  10.1088/1757-899X/47/1/012058

来源: IOP

【 摘 要 】

In this paper, the synthesis of Al4SiC4used as natural oxide materials by carbothermal reduction was investigated in order to explore the synthesis route with low costs. The samples were calcined by using kaolin grog, aluminum and carbon black as raw materials with the selected proportion at the temperature from 1500 to 1800 ° C for 2 hours under flow argon atmosphere. The phase composition of reaction products were determined by X-ray diffraction. The microstructure and elemental composition of different phases were observed and identified by scanning electron microscopy and energy dispersive spectroscopy. The mechanism of reaction processing was discussed. The results show that Al4SiC4powders composed of hexagonal plate-like particulates with various sizes and the thickness of less than 20 μm are obtained when the temperature reaches 1800 °C.