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Solution‐Precipitation of Fine Powders of Barium Titanate and Strontium Titanate
Author(s) -
Kumar Viswanathan
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02126.x
Subject(s) - materials science , agglomerate , ceramic , barium titanate , precipitation , stoichiometry , perovskite (structure) , chemical engineering , strontium titanate , titanate , mineralogy , dielectric , electroceramics , strontium , metal , metallurgy , composite material , chemistry , fabrication , organic chemistry , medicine , microfabrication , physics , alternative medicine , optoelectronics , pathology , meteorology , engineering
Hydrolytic reactions of metal alkoxides offer a broad range of possibilities for their use in the preparation of ceramic powders. This paper reports a unique and novel process to prepare fine powders of BaTiO 3 and SrTiO 3 from stable precursor solutions by carefully controlling the pH and temperature. This simple route offers good control of stoichiometry and the powders are agglomerate‐free with fine particles of size 0.06–0.1 µm and were well sintered at 1200° and 1350°C, respectively. The dielectric properties of the dense ceramics are also reported. The formation aspects of these perovskite phases are also discussed.