Sintering mechanism and microwave dielectric properties of Bi12 TiO20 ceramics

Byoung Jik Jeong; Mi Ri Joung; Jin Seong Kim; Sahn Nahm; Ji Won Choi; Seong Ju Hwang

doi:10.1111/jace.12549

Sintering mechanism and microwave dielectric properties of Bi₁₂ TiO₂₀ ceramics

Byoung Jik Jeong, Mi Ri Joung, Jin Seong Kim, Sahn Nahm, Ji Won Choi, Seong Ju Hwang

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

16 Citations (Scopus)

Abstract

A homogeneous Bi₁₂TiO₂₀ phase was developed in a specimen that was calcined at 700°C without the formation of a secondary phase. A small amount of the Bi₁₂TiO₂₀ phase melted during sintering and assisted the densification of the specimen. The Bi ₂O₃ and Bi₈TiO₁₄ secondary phases were found in all specimens. All the specimens that were sintered at temperatures ≥775°C exhibited high relative densities above 98% of the theoretical density. The Q × f value of the Bi₁₂TiO ₂₀ ceramics was influenced by the grain size. The Bi ₁₂TiO₂₀ ceramics sintered at 800°C for 5 h showed promising microwave dielectric properties of ε_r = 41, Q × f = 10 400 GHz, and τ_f = -10.8 ppm/°C.

Original language	English
Pages (from-to)	3742-3746
Number of pages	5
Journal	Journal of the American Ceramic Society
Volume	96
Issue number	12
DOIs	https://doi.org/10.1111/jace.12549
Publication status	Published - 2013 Dec

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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title = "Sintering mechanism and microwave dielectric properties of Bi12 TiO20 ceramics",

abstract = "A homogeneous Bi12TiO20 phase was developed in a specimen that was calcined at 700°C without the formation of a secondary phase. A small amount of the Bi12TiO20 phase melted during sintering and assisted the densification of the specimen. The Bi 2O3 and Bi8TiO14 secondary phases were found in all specimens. All the specimens that were sintered at temperatures ≥775°C exhibited high relative densities above 98% of the theoretical density. The Q × f value of the Bi12TiO 20 ceramics was influenced by the grain size. The Bi 12TiO20 ceramics sintered at 800°C for 5 h showed promising microwave dielectric properties of εr = 41, Q × f = 10 400 GHz, and τf = -10.8 ppm/°C.",

author = "Jeong, {Byoung Jik} and Joung, {Mi Ri} and Kim, {Jin Seong} and Sahn Nahm and Choi, {Ji Won} and Hwang, {Seong Ju}",

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T1 - Sintering mechanism and microwave dielectric properties of Bi12 TiO20 ceramics

AU - Jeong, Byoung Jik

AU - Joung, Mi Ri

AU - Kim, Jin Seong

AU - Nahm, Sahn

AU - Choi, Ji Won

AU - Hwang, Seong Ju

PY - 2013/12

Y1 - 2013/12

N2 - A homogeneous Bi12TiO20 phase was developed in a specimen that was calcined at 700°C without the formation of a secondary phase. A small amount of the Bi12TiO20 phase melted during sintering and assisted the densification of the specimen. The Bi 2O3 and Bi8TiO14 secondary phases were found in all specimens. All the specimens that were sintered at temperatures ≥775°C exhibited high relative densities above 98% of the theoretical density. The Q × f value of the Bi12TiO 20 ceramics was influenced by the grain size. The Bi 12TiO20 ceramics sintered at 800°C for 5 h showed promising microwave dielectric properties of εr = 41, Q × f = 10 400 GHz, and τf = -10.8 ppm/°C.

AB - A homogeneous Bi12TiO20 phase was developed in a specimen that was calcined at 700°C without the formation of a secondary phase. A small amount of the Bi12TiO20 phase melted during sintering and assisted the densification of the specimen. The Bi 2O3 and Bi8TiO14 secondary phases were found in all specimens. All the specimens that were sintered at temperatures ≥775°C exhibited high relative densities above 98% of the theoretical density. The Q × f value of the Bi12TiO 20 ceramics was influenced by the grain size. The Bi 12TiO20 ceramics sintered at 800°C for 5 h showed promising microwave dielectric properties of εr = 41, Q × f = 10 400 GHz, and τf = -10.8 ppm/°C.

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Sintering mechanism and microwave dielectric properties of Bi₁₂ TiO₂₀ ceramics

Abstract

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