Evidence of ZrO2 sol-gel transition by gelation time and viscosity

被引：12

作者：

Chang, Qibing ^{[1
]}

Cerneaux, Sophie ^{[2
]}

Wang, Xia ^{[1
]}

Zhang, Xiaozhen ^{[1
]}

Wang, Yongqing ^{[1
]}

Zhou, Jian-er ^{[1
]}

机构：

[1] Jingdezhen Ceram Inst, Sch Mat Sci & Engn, Key Lab Jiangxi Univ Inorgan Membranes, Jingdezhen 333403, Jiangxi Provinc, Peoples R China

[2] Inst Europeen Membranes, UMR 5635, F-34095 Montpellier, France

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2015年 / 73卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Sol-gel; Zirconia; Gelation time; Viscosity; Transition process; YTTRIA-STABILIZED ZIRCONIA; EXPERIMENTAL PARAMETERS; HYDROLYSIS; ROUTE;

D O I：

10.1007/s10971-014-3516-0

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Sol-gel transition is a stage of the sol that evolves towards the formation of a gel-like network and that exhibits gradually a mobility loss. Hence, the measurement of both viscosity and gelation time is expected to evidence the sol-gel transition occurrence. ZrO2 sols were prepared using zirconium oxychloride octahydrated as precursor material. The structures of the sols before and after gelation were characterized by TEM. Gelation time depends on the concentrations of the reactants and the aging temperature. Viscosity increases linearly with the gelation time firstly, and then increases exponentially nearby the sol-gel transition point. TEM results show the gel is granular before the sol-gel transition point, and appears as brain-like structure after this point. The determination of the sol-gel transition point is to enable the optimum aging time of a sol and to perform the next operations which determine the desired shape of gel (bulk, film, powder, etc.).

引用

页码：208 / 214

页数：7

共 25 条

[1] The effect of hydrolysis initiator on the phase formation in sulfated sol-gel zirconia [J].