Effects of Zirconia on Microstructure and Dielectric Properties of Barium Titanate Ceramics
作者： Timothy R. Armstrong , Laurie E. Morgens , Alena K. Maurice , Relva C. Buchanan
DOI: 10.1111/J.1151-2916.1989.TB06182.X
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摘要: Dielectric properties and structural characteristics of BaTiO3 ceramics are significantly influenced by small addition (2 wt%) ZrO2. SEM TEM observations revealed enhanced microstructural uniformity retarded grain growth depending on sintering temperature. Above 1320°C, Zr diffusion into the lattice resulted in a chemical modification tetragonal structure development core–shell grains. Below analysis showed ZrO2 at boundaries as discrete particles (∼0.03μm). X-ray diffraction decrease axial (c/a) ratio with decreasing size. A corresponding spontaneous polarization, twinned domain structures, were also observed fine-grained ceramics. These samples flattened permittivity response temperature lower losses.
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