Title :
Sol-gel techniques for the preparation of ultrafine BaTiO3 powders
Author :
Zhang, Qitu ; Shen, Dawei ; Wang, Hui ; Xue, Wanrong ; Zhao, Meiyu
Author_Institution :
Dept. of Silicate Eng., Nanjing Inst. of Chem. Eng., Jiangsu, China
fDate :
30 Aug-2 Sep 1992
Abstract :
It is shown that Ba(ClO4)2 and LiOC2 H5 can be used as precursors to form Ba(OC2H 5)2. In addition, BaTiO3 ultrafine powders can be prepared by the sol-gel process from Ba(OC2H 5)2 and Ti(OC4H9)4. Ethylene glycol added to ethyl alcohol can greatly increase the solubility of Ba(OC2H 5)2, and thus the concentration of Ba(OC2 H5)2 and Ti(OC4H9)4 can be increased. This leads to a fast sol-gel process for forming BaTiO3 gel. Sol-gel-prepared ultrafine BaTiO3 powders crystallize significantly if heated to 750°C, and crystals fully develop at 900°C. Sol-gel-prepared BaTiO3 powders are ultrafine narrowly distributed in size, and spherical and polyhedral in appearance
Keywords :
X-ray diffraction examination of materials; barium compounds; grain size; particle size; powder technology; sol-gel processing; thermal analysis; Ba(ClO4)2; BaTiO3 gel; BaTiO3 ultrafine powders; appearance; barium ethoxide; concentration; ethyl alcohol; ethylene glycol; polyhedral; size; sol-gel process; solubility; spherical; titanium butoxide; Amorphous materials; Anti-freeze; Gravity; Powders; Solid state circuits; Temperature; Testing; Thermal conductivity; Water heating; X-ray diffraction;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300623
