BaTiO_3の焼結と微細構造に及ぼすLi_2Si_2O_5の影響

概要

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Densofication behavior and microstructural characteristics were examined for BaTiO_3 containing 0.25-2.00 mass% Li_2Si_2O_5. Li_2Si_2O_5 lowered the sintering temperature of BaTiO_3. The optimum concentration to obtain high density was 1 mass%. A concentration smaller than the optimum value did not effectively lower the sintering temperature, while a larger concentration resulted in the formation of inhomogeneous microstructure. There was an optimum sintering temperature to obtain compacts with maximum density. Extensive grain growth occurred above the optimum temperature. The grain boundary phase, which was a liquid phase at the sintering temperature, contained TiO_2-rich particles, whose distribution was non-uniform. The formation mechanisms of such microstructure were discussed.
社団法人日本セラミックス協会の論文
2001-03-01