Abstract
Effects of MgO coating on microstructure and dielectric properties of BaTiO 3 have been studied compared with mechanically MgO mixed BaTiO 3. MgO-coated BaTiO 3 particles were prepared by a homogeneous precipitation method using MgCl 2·6H 2O and urea. TEM micrograph showed homogeneous adsorption of MgO particles on the BaTiO 3 surfaces. MgO coated and mixed samples showed different dielectric behaviors because uniformity of microstructures and shape of core-shell structure were different each other. Bulk density was slightly decreased with increasing MgO content. EPMA analysis indicates that microstructures and dielectric behaviors were affected by the distribution of MgO in the BaTiO 3 matrix.
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