酯化淀粉原位凝固成型Al_2O_3陶瓷的研究  

Study on Alumina Ceramic by Esterified Starch Consolidation In-Situ

作　　者：宋贤良[1,2] 陈玲[1] 叶建东[3] 

机构地区：[1]华南理工大学轻化工研究所 [2]华南农业大学食品学院,广州510640 [3]华南理工大学材料学院

出　　处：《硅酸盐通报》2006年第1期90-93,共4页Bulletin of the Chinese Ceramic Society

基　　金：武器装备预研基金(51412020401JW1601)

摘　　要：研究了以淀粉作凝胶剂原位凝固成型Al2O3陶瓷的新方法。当淀粉大分子在水溶液中加热到一定温度时,淀粉颗粒吸水溶胀,陶瓷浆料脱水并固化成坚硬的坯体;而且溶胀后的淀粉可作为粘结剂,有助于坯体固化并增加其强度。详细探讨了酯化淀粉添加量不同时,对陶瓷浆料流变特性的影响,以及对成型出素坯的线收缩、相对密度、干坯强度以及显微结构的影响。A new consolidation in - situ forming process for high performance ceramics using starch as consolidator/ binder was investigated. When starch macromolecule in water was heated to a certain temperature, the starch particles swelled by water uptake, and this swelling removed water from ceramic slip causing the fluid suspension to consolidate into a rigid body. The swelled starch as binder contributed to consolidating the body and increasing its strength. The effects of different content of the esterified starch on rheologicl behaviour of ceramic slip, drying shrinkage, density, strength and microstructure of the green body were discussed.

关 键 词：淀粉 原位凝固成型 高性能陶瓷 陶瓷浆料 

分 类 号：TQ174.758[化学工程—陶瓷工业] TQ174.626[化学工程—硅酸盐工业]