Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 104, Issue 2-3, Pages 261-266Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2007.02.092
Keywords
BaTiO3; MgO; coating; dielectric; lattice constant
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Funding
- Korea Institute of Industrial Technology(KITECH) [ML005-7-01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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MgO coated BaTiO3 powder prepared by a homogeneous precipitation method revealed an adsorption of fine MgO particles on the BaTiO3 surface. MgO coated BaTiO3 increased the onset temperature of shrinkage, compared with mechanically MgO added BaTiO3. Dielectric constants of MgO mixed BaTiO3 decreased with increasing MgO contents, whereas MgO coated BaTiO3 showed less dependence on MgO contents. The showed smaller lattice paramete shell phase formation temperature of MgO coated BaTiO3 were higher than the mixed ones. MgO coated BaTiO3 compared with mixed samples, where both specimens have the same MgO content. Extra MgO phase was detected on all of the MgO-doped BaTiO3. However, MgO mixed BaTiO3 showed weaker characteristic X-ray diffraction peaks of MgO phase than coated samples. (c) 2007 Elsevier B.V. All rights reserved.
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