2005•Journal of Inorganic MaterialsRequires access

Dielectric Properties of BSTO/Mg_2SiO_4/MgO Ceramic Composites

Xian Dong

Abstract

BSTO/Mg2Si04/MgO ceramic composites were fabricated by conventional ceramic processing. The microstructures and dielectric properties of the samples were measured and investigated systemically. The effects of the doping of Mg2SiO4/MgO on the microstructures and dielectric properties of BSTO/Mg2Si04/MgO ceramic composites were investigated. The results show that compared with the other BSTO ceramic composites, BSTO/Mg2SiO4/MgO ceramic composites not only can be sintered at a lower temperature but also keep a higher tunability while the dielectric constant decreases. The typical composition of BSTO/39wt/% Mg2SiO4/17wt% MgO has a dielectric constant of ~80.21, a dielectric loss of -0.003 and a tunability of ~12% under applying 2kV/mm dc bias field.

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Key concepts: Materials science, Ceramic, Dielectric, Composite material, Microstructure, Doping, Dielectric loss, Optoelectronics