摘要
本文用微硅粉和工业氧化铝粉为起始原料,马铃薯淀粉为造孔剂,通过原位反应烧结工艺制备了高强度多孔莫来石陶瓷材料。研究了不同烧结温度,不同淀粉含量对合成莫来石多孔陶瓷工艺影响。结果表明:以优化起始原料Al2O3/SiO2摩尔比为3∶2.5,淀粉含量40 wt%,在1450℃温度下烧结样品孔隙率为36.07%、体积密度为2.02g/cm3时、热导率为1.40 W·m-1·K-1,折强度达到79.91 MPa,莫来石纯度达95wt%。该工艺研究产品的研发为提高微硅粉附加值提供技术支撑。
An in situ reaction-sintering technique was taken to prepare porous mullite ceramics from silica fume and Al2O3, using potato starch as the pore former. The effects of sinter temperature and starch content on mullite were investigated. As a conclusion, the values of porosity, bulk density, thermal conductivity, rupture strength and mullite content are 36.07% , 2.02 g/cm3, 1.40 W . m-1·K-1, and 79.91 MPa, 95wt% , respectively, for the sintered samples of 1450℃ and 40wt% starch. The research provides a technology support for the value-added silica fume.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第11期2244-2248,共5页
Bulletin of the Chinese Ceramic Society
关键词
微硅粉
淀粉
板条状
莫来石
原位合成
silica fume
starch
lath-shape
mullite
In-situ synthesis
