高铝瓷中二次莫来石对电瓷强度的影响

研究了铝氧原料种类及长石用量对铝质高强度电瓷中二次莫来石结晶形态的影响。结果表明:以工业氧化铝为原料时易形成颗粒状二次莫来石,以铝矾土为原料时有利于形成针状莫来石,用部分工业氧化铝替代铝矾土则可改善二次莫来石的网状结构,显著提高电瓷的机械强度。适当增加长石含量,可促进二次莫来石晶体生长并提高电瓷的致密度和机械强度。

Effects of Secondary Mullite on the Mechanical Strength of Aluminous Porcelain

Effects of types of alumina materials and the amount of feldspar on crystalline shape of secondary mullite in high-strength aluminous electric porcelain have been discussed in this paper.Results exhibit that using industrial alumina as raw material tends to form secondary mullite grain,while bauxite helps to generate secondary mullite whisker.Substituting industrial alumina for bauxite may improve the mesh texture of secondary mullite and increase the mechanical strength of aluminous porcelain greatly.Adding proper amount of feldspar may promote the growth of secondary mullite crystal,the density and the mechanical strength of aluminous porcelain.