Barium Titanate Perovskite Sintered with Lithium Fluoride

The sintering of barium titanate with, respectively, 1 and 2 wt% LiF for two stoichiometries, Ti/Ba=1 and 0.975, was studied using two calcined powders. One was pure barium titanate; the other contained BaTi03 plus BaC03 and TiO2 that did not react when burning. The sintering chronology—intermediate...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1983-11, Vol.66 (11), p.801-807
Main Authors: HAUSSONNE, J. M., DESGARDIN, G., BAJOLET, PH, RAVEAU, B.
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Technical ceramics
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Summary:The sintering of barium titanate with, respectively, 1 and 2 wt% LiF for two stoichiometries, Ti/Ba=1 and 0.975, was studied using two calcined powders. One was pure barium titanate; the other contained BaTi03 plus BaC03 and TiO2 that did not react when burning. The sintering chronology—intermediate phases, appearance, and disappearance of a liquid phase that has been pointed out for the first time—is directly dependent on the used calcined powder, on the LiF amount, and on the firing schedule. In the same way, the obtained perovskite symmetry varies during sintering from tetragonal to cubic and then to a second tetragonal form, whereas most of the Li and F disappear from the ceramic with two different kinetics.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1983.tb10566.x