用不同硅质原料来制备莫来石结合碳化硅多孔陶瓷  

FABRICATION OF POROUS MULLITE/SiC COMPOSITE CERAMIC WITH DIFFERENT RAW SILICA MATERIALS

作　　者：武七德[1] 张丽[2] 吴鲁[2] 王国民 陈晨 

机构地区：[1]武汉理工大学硅酸盐工程中心教育部重点实验室,430070 [2]武汉理工大学材料科学与工程学院,430070 [3]中国水电建设集团国际公司矿产部,100444 [4]山东电力集团东营供电公司,257091

出　　处：《陶瓷学报》2008年第2期111-116,共6页Journal of Ceramics

摘　　要：分别以Al(OH)3为铝质原料,气相白炭黑和硅灰为硅质原料,在1330℃下实现了莫来石的低温合成,莫来石转化率达90%以上。以碳化硅为骨料,以20%结合剂制得了莫来石结合碳化硅复相陶瓷多孔材料。当材料的气孔率为31.46%时,抗折强度达85.75 MPa。利用XRD和SEM分别研究了不同硅质原料合成莫来石结合碳化硅材料中莫来石转化率及材料烧成温度对材料性能的影响。作为比较,研究了以红柱石为合成莫来石原料来制备Mullite/SiC复相陶瓷多孔材料。Al2O3 was provided by Al（OH）3 powder and SiO2 was provided by nano-silicon oxide or microsilica. Mullite was synthesized from mixture of Al（OH）3 powder and nano-silicon oxide or microsilica at the lower temperature 1330 ℃,and the content of mullite phase is above 90%. With the silicon carbide to be the matrix and 20% bonder material, porous Mullite/ SiC Composite was synthesized. The flexural strength is 85.75 MPa when the apparent porosity is 31.46%. The influence of the Al（OH）3 powder, nano-silicon oxide and microsilica to the content and property of mullite were studied. The influence of the content of mullite and the composite＇s sintering temperature to the composite were also analyzed with XRD and SEM. Porous Mullite/SiC Composite was also synthesized with andalusite to compared with Al（OH）3 powder and SiO2.

关 键 词：莫来石结合碳化硅 低温合成 多孔陶瓷 

分 类 号：TQ174.75[化学工程—陶瓷工业]