Effect of Mn doping on the dielectric tunable properties of Ba sub(0.5)Sr sub(0.5)TiO sub(3)-MgO-Mg sub(2)SiO sub(4) composite ceramics

Mn-doped Ba sub(0.5)Sr sub(0.5)TiO sub(3)-MgO-Mg sub(2)SiO sub(4) composite ceramics were prepared by a solid-state reaction method, and the dielectric tunable properties were investigated. It was observed that the composite ceramics show three crystalline phases: Ba sub(0.5)Sr sub(0.5)TiO sub(3), M...

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Published inJournal of materials science. Materials in electronics Vol. 24; no. 11; pp. 4161 - 4165
Main Authors Xu, Yebin, Lv, Chao, He, Yanyan, Zhao, Jingyuan, Li, Changnian, Li, Buyin
Format Journal Article
LanguageEnglish
Published 01.11.2013
Subjects
Ceramics
Dielectric constant
Dielectric properties
Doping
Magnesium oxide
Manganese
Microwaves
Phases
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Summary:Mn-doped Ba sub(0.5)Sr sub(0.5)TiO sub(3)-MgO-Mg sub(2)SiO sub(4) composite ceramics were prepared by a solid-state reaction method, and the dielectric tunable properties were investigated. It was observed that the composite ceramics show three crystalline phases: Ba sub(0.5)Sr sub(0.5)TiO sub(3), MgO and Mg sub(2)SiO sub(4) phases. Mn doping significantly improves the dielectric tunable properties of Ba sub(0.5)Sr sub(0.5)TiO sub(3)-MgO-Mg sub(2)SiO sub(4) composite ceramics. Mn-doped Ba sub(0.5)Sr sub(0.5)TiO sub(3)-MgO-Mg sub(2)SiO sub(4) composites have dielectric constant of 114.2-127.0, and tunability of 11.3-13.0 % at 10 kHz under 3 kV/mm, indicating that they are promising candidate materials for tunable microwave applications requiring a low dielectric constant.
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ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-013-1376-y