Grain boundary segregation and microwave dielectric properties of low loss Mg1•5Zn0•5SiO4 ceramics containing Bi2O3

S. T. Lee; Y. H. Jo; H. E. Kim; D. H. Youn; I. J. Choi; S. H. Key; C. Y. Kang; W. S. Hong; Y. S. Cho

doi:10.1179/174367609X455995

Grain boundary segregation and microwave dielectric properties of low loss Mg_1•5Zn_0•5SiO₄ ceramics containing Bi₂O₃

S. T. Lee, Y. H. Jo, H. E. Kim, D. H. Youn, I. J. Choi, S. H. Key, C. Y. Kang, W. S. Hong, Y. S. Cho

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Uncommon low loss Mg_1•5Zn_0•5SiO₄ ceramics containing Bi₂O₃ were investigated by focusing on the roles of Bi₂O₃ on phase evolution and resultant microwave dielectric properties. While the primary goal of lowering sintering temperature can be easily assumed, some unexpected behaviours of the Bi ₂O₃ containing materials are highlighted with experimental evidences concerning selective dissolution of Zn₂SiO₄ and grain boundary segregation of gradual Bi richer phases. These evidences are strongly dependent on the content of Bi₂O₃ and sintering temperature. As an optimal composition, Mg_1•5Zn _0•5SiO₄ with 0•5?mol.-%Bi₂O ₃ exhibited promising dielectric properties of a k value ∼6•8 and a Q×f value ∼23∈300 at a sintering temperature of 1150°C, which is much lower than typical sintering temperature of 1450°C.

Original language	English
Pages (from-to)	367-372
Number of pages	6
Journal	Advances in Applied Ceramics
Volume	109
Issue number	6
DOIs	https://doi.org/10.1179/174367609X455995
Publication status	Published - 2010 Aug 1

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Industrial and Manufacturing Engineering

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title = "Grain boundary segregation and microwave dielectric properties of low loss Mg1•5Zn0•5SiO4 ceramics containing Bi2O3",

abstract = "Uncommon low loss Mg1•5Zn0•5SiO4 ceramics containing Bi2O3 were investigated by focusing on the roles of Bi2O3 on phase evolution and resultant microwave dielectric properties. While the primary goal of lowering sintering temperature can be easily assumed, some unexpected behaviours of the Bi 2O3 containing materials are highlighted with experimental evidences concerning selective dissolution of Zn2SiO4 and grain boundary segregation of gradual Bi richer phases. These evidences are strongly dependent on the content of Bi2O3 and sintering temperature. As an optimal composition, Mg1•5Zn 0•5SiO4 with 0•5?mol.-%Bi2O 3 exhibited promising dielectric properties of a k value ∼6•8 and a Q×f value ∼23∈300 at a sintering temperature of 1150°C, which is much lower than typical sintering temperature of 1450°C.",

author = "Lee, {S. T.} and Jo, {Y. H.} and Kim, {H. E.} and Youn, {D. H.} and Choi, {I. J.} and Key, {S. H.} and Kang, {C. Y.} and Hong, {W. S.} and Cho, {Y. S.}",

year = "2010",

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doi = "10.1179/174367609X455995",

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T1 - Grain boundary segregation and microwave dielectric properties of low loss Mg1•5Zn0•5SiO4 ceramics containing Bi2O3

AU - Lee, S. T.

AU - Jo, Y. H.

AU - Kim, H. E.

AU - Youn, D. H.

AU - Choi, I. J.

AU - Key, S. H.

AU - Kang, C. Y.

AU - Hong, W. S.

AU - Cho, Y. S.

PY - 2010/8/1

Y1 - 2010/8/1

N2 - Uncommon low loss Mg1•5Zn0•5SiO4 ceramics containing Bi2O3 were investigated by focusing on the roles of Bi2O3 on phase evolution and resultant microwave dielectric properties. While the primary goal of lowering sintering temperature can be easily assumed, some unexpected behaviours of the Bi 2O3 containing materials are highlighted with experimental evidences concerning selective dissolution of Zn2SiO4 and grain boundary segregation of gradual Bi richer phases. These evidences are strongly dependent on the content of Bi2O3 and sintering temperature. As an optimal composition, Mg1•5Zn 0•5SiO4 with 0•5?mol.-%Bi2O 3 exhibited promising dielectric properties of a k value ∼6•8 and a Q×f value ∼23∈300 at a sintering temperature of 1150°C, which is much lower than typical sintering temperature of 1450°C.

AB - Uncommon low loss Mg1•5Zn0•5SiO4 ceramics containing Bi2O3 were investigated by focusing on the roles of Bi2O3 on phase evolution and resultant microwave dielectric properties. While the primary goal of lowering sintering temperature can be easily assumed, some unexpected behaviours of the Bi 2O3 containing materials are highlighted with experimental evidences concerning selective dissolution of Zn2SiO4 and grain boundary segregation of gradual Bi richer phases. These evidences are strongly dependent on the content of Bi2O3 and sintering temperature. As an optimal composition, Mg1•5Zn 0•5SiO4 with 0•5?mol.-%Bi2O 3 exhibited promising dielectric properties of a k value ∼6•8 and a Q×f value ∼23∈300 at a sintering temperature of 1150°C, which is much lower than typical sintering temperature of 1450°C.

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Grain boundary segregation and microwave dielectric properties of low loss Mg_1•5Zn_0•5SiO₄ ceramics containing Bi₂O₃

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