Sol-Gel Syntheses and Characterization of BaTi4O9 and BaTiO3-Powders
- 1 January 1988
- journal article
- Published by Springer Nature in MRS Proceedings
Abstract
Sol-gel processes for the synthesis of high purity, ultrafine BaTi4O9 and BaTiO3 powders are described. Hydrolysis of an alkoxide precursor derived from barium metal and titanium (IV) isopropoxide resulted in formation of powders consisting of ultrafine (0.2 to 1.0 μm) spherical particles. These amorphous precursor powders were converted to crystalline BaTi4O9 powders (particle size 2–3 μm) by heat treatment at 1100 C. The sol-gel process for the synthesis of BaTiOj powders utilized chemical polymerization between moisture insensitive and relatively inexpensive barium acetate and titanium (IV) isopropoxide in the presence of acetic acid. The gel to ceramic conversion was achieved by firing the gels at 1000 °C to obtain high purity, stoichiometric BaTiO3 powders. The powders were sintered to obtain relatively dense (90 % relative density) ceramic bodies.Keywords
This publication has 11 references indexed in Scilit:
- Sol-Gel Synthesis of Barium Titanate Powders Using Barium Acetate and Titanium(IV) IsopropoxideAdvanced Ceramic Materials, 1988
- BaO‐TiO2‐WO3 Microwave Ceramics and Crystalline BaWO4Journal of the American Ceramic Society, 1988
- Comparison of Ba(OH)2, BaO, and Ba as Starting Materials for the Synthesis of Barium Titanate by the Alkoxide MethodJournal of the American Ceramic Society, 1987
- Effect of Mn Doping on the Dielectric Properties of Ba2Ti9O20 Ceramics at Microwave FrequencyJapanese Journal of Applied Physics, 1983
- Preparation of Compounds in BaO-TiO2 System by Coprecipitation from AlkoxidesJournal of the Japan Society of Powder and Powder Metallurgy, 1978
- Ba2Ti9O20 as a Microwave Dielectric ResonatorJournal of the American Ceramic Society, 1975
- Phase Equilibria in the TiO2‐Rich Region of the System BaO‐TiO2Journal of the American Ceramic Society, 1974
- A New BaO‐TiO2 Compound with Temperature‐Stable High Permittivity and Low Microwave LossJournal of the American Ceramic Society, 1974
- Synthesis of Nb2O5-Doped BaTiO3with Improved Electrical PropertiesJournal of the American Ceramic Society, 1972
- Preparation of High‐Purity Submicron Barium Titanate PowdersJournal of the American Ceramic Society, 1969