溶胶-凝胶干燥工艺对粉体烧结活性的影响研究  

The Effects of Drying Technology of Sol-Gel on the Sintering Activity of Powders

作　　者：王卫民[1] 魏少红[1] 赵双会[1] 王留昌[1] 李文博[1] 

机构地区：[1]安阳师范学院,河南安阳455002

出　　处：《信阳师范学院学报（自然科学版）》2008年第4期560-562,共3页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：河南省科技攻关项目(0424220051);安阳师范学院重点学科资助项目

摘　　要：以柠檬酸-硝酸盐-乙二醇体系为研究对象,以共沸蒸馏与减压蒸馏联合工艺为技术手段,以提高溶胶凝胶脱水率、进而提高粉体的烧结活性为目的,开展了溶胶凝胶干燥工艺对粉体烧结活性的影响研究.研究结果表明:溶胶凝胶在高温条件下加热脱水会导致合成粉体形成硬团聚,影响粉体的烧结活性;使用共沸减压蒸馏可有效提高溶胶凝胶的脱水率,有机溶剂在水中的溶解度越小,脱水的效率就越大;溶胶凝胶的脱水率直接影响合成粉体的烧结活性,脱水率越大,粉体的烧结活性越高.The aim of this paper is to increase the dehydrating ratio of citric-nitrate-EG sol-gel with azeotropic distillation and vacuum distillation, and further more, to boost the activity of powders. The experiment results indicated that dehydrating in high temperature will lead to hard-agglomeration. Azeotropie distillation, combining with vacuum distillationcan, improved dehydrating ratio effectively. The less the organic solvent dissolves in water, the higher will the dehydrating ratio be. The dehydrating ratio has effect on sintering activity of powders obtained from sol-gel. The higher the dehydrating ratio is, the higher would the sintering activity be.

关 键 词：溶胶凝胶 干燥 共沸蒸馏 减压蒸馏 

分 类 号：TM283[一般工业技术—材料科学与工程]