用煤矸石和煤合成β-SiC-Al_2O_3复相材料的研究

Research on the synthesis of β-SiC-Al_2O_3 from gangue and anthracite

以煤矸石和无烟煤为原料 ,研究了在高温下合成β SiC -Al2 O3复相材料的可行性 ,并对原料的选取和合成工艺制度进行了探索 ,结果表明 :1 )在一定温度及煤过量的条件下 ,不加保护气体 ,通过碳热还原反应可以得到较高含量的 β SiC -Al2 O3复相陶瓷材料。 2 )细度的增大能明显提高反应进程 ,得到较纯的β SiC -Al2 O3复相材料。

Al 2O 3-SiC composite was prepared by carbon thermal reduction reaction with gangue and anthracite as raw materials.The influences of temperature,anthracite addition and the fineness of the raw materials on product composition were studied. The results showed :1) Al 2O 3-SiC composite powder can be got under suitable condition (1600℃,4h,15%～25% anthracite plus) 2) great fineness can accelerate the reaction and high purity β SiC-Al 2O 3 composite is obtained.