Microwave dielectric properties of Bi2O3-doped Ca[(Li1/3Nb2/3)1-xTix] O3-δ ceramics

Jong Yoon Ha; Ji Won Choi; Seok Jin Yoon; Doo Jin Choi; Ki Hyun Yoon; Hyun Jai Kim

doi:10.1016/S0955-2219(03)00162-6

Microwave dielectric properties of Bi₂O₃-doped Ca[(Li_1/3Nb_2/3)_1-xTi_x] O_3-δ ceramics

Jong Yoon Ha, Ji Won Choi, Seok Jin Yoon, Doo Jin Choi, Ki Hyun Yoon, Hyun Jai Kim

Department of Materials Science and Engineering

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

37 Citations (Scopus)

Abstract

The effect of the additive on the densification, low temperature sintering, and microwave dielectric properties of the Ca[(Li_1/3Nb_2/3)_1-x Ti_x]O_3-δ(CLNT) was investigated. Bi₂O₃ addition improved the densification and reduced the sintering temperature from 1150 to 900 °C of CLNT microwave dielectric ceramics. As the Bi₂O₃ content increased, the dielectric constant (ε_r) and bulk density increased. The quality factor (Q·f₀), however, was decreased slightly. The temperature coefficient of resonant frequency (τ_f) shifted to a positive value with increasing Bi₂O₃ content. The dielectric properties (ε_r, Q·f_0, τ_f) of Ca[(Li_1/3Nb_2/3)_0.95Ti_0.05] O_3-δ and Ca[(Li_1/3 Nb_2/3)_0.8 Ti_0.2]O_3-δ with 5 wt.% Bi₂O₃ sintered at 900 °C for 3 were 20, 6500 GHz, -4 ppm/°C, and 35, 11,000 GHz, 13 ppm/°, respectively. The relationship between the microstructure and dielectric properties was studied by X-ray diffraction (XRD), and SEM.

Original language	English
Pages (from-to)	2413-2416
Number of pages	4
Journal	Journal of the European Ceramic Society
Volume	23
Issue number	14
DOIs	https://doi.org/10.1016/S0955-2219(03)00162-6
Publication status	Published - 2003

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1016/S0955-2219(03)00162-6

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title = "Microwave dielectric properties of Bi2O3-doped Ca[(Li1/3Nb2/3)1-xTix] O3-δ ceramics",

abstract = "The effect of the additive on the densification, low temperature sintering, and microwave dielectric properties of the Ca[(Li1/3Nb2/3)1-x Tix]O3-δ(CLNT) was investigated. Bi2O3 addition improved the densification and reduced the sintering temperature from 1150 to 900 °C of CLNT microwave dielectric ceramics. As the Bi2O3 content increased, the dielectric constant (εr) and bulk density increased. The quality factor (Q·f0), however, was decreased slightly. The temperature coefficient of resonant frequency (τf) shifted to a positive value with increasing Bi2O3 content. The dielectric properties (εr, Q·f0, τf) of Ca[(Li1/3Nb2/3)0.95Ti0.05] O3-δ and Ca[(Li1/3 Nb2/3)0.8 Ti0.2]O3-δ with 5 wt.% Bi2O3 sintered at 900 °C for 3 were 20, 6500 GHz, -4 ppm/°C, and 35, 11,000 GHz, 13 ppm/°, respectively. The relationship between the microstructure and dielectric properties was studied by X-ray diffraction (XRD), and SEM.",

author = "Ha, {Jong Yoon} and Choi, {Ji Won} and Yoon, {Seok Jin} and Choi, {Doo Jin} and Yoon, {Ki Hyun} and Kim, {Hyun Jai}",

year = "2003",

doi = "10.1016/S0955-2219(03)00162-6",

language = "English",

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T1 - Microwave dielectric properties of Bi2O3-doped Ca[(Li1/3Nb2/3)1-xTix] O3-δ ceramics

AU - Ha, Jong Yoon

AU - Choi, Ji Won

AU - Yoon, Seok Jin

AU - Choi, Doo Jin

AU - Yoon, Ki Hyun

AU - Kim, Hyun Jai

PY - 2003

Y1 - 2003

N2 - The effect of the additive on the densification, low temperature sintering, and microwave dielectric properties of the Ca[(Li1/3Nb2/3)1-x Tix]O3-δ(CLNT) was investigated. Bi2O3 addition improved the densification and reduced the sintering temperature from 1150 to 900 °C of CLNT microwave dielectric ceramics. As the Bi2O3 content increased, the dielectric constant (εr) and bulk density increased. The quality factor (Q·f0), however, was decreased slightly. The temperature coefficient of resonant frequency (τf) shifted to a positive value with increasing Bi2O3 content. The dielectric properties (εr, Q·f0, τf) of Ca[(Li1/3Nb2/3)0.95Ti0.05] O3-δ and Ca[(Li1/3 Nb2/3)0.8 Ti0.2]O3-δ with 5 wt.% Bi2O3 sintered at 900 °C for 3 were 20, 6500 GHz, -4 ppm/°C, and 35, 11,000 GHz, 13 ppm/°, respectively. The relationship between the microstructure and dielectric properties was studied by X-ray diffraction (XRD), and SEM.

AB - The effect of the additive on the densification, low temperature sintering, and microwave dielectric properties of the Ca[(Li1/3Nb2/3)1-x Tix]O3-δ(CLNT) was investigated. Bi2O3 addition improved the densification and reduced the sintering temperature from 1150 to 900 °C of CLNT microwave dielectric ceramics. As the Bi2O3 content increased, the dielectric constant (εr) and bulk density increased. The quality factor (Q·f0), however, was decreased slightly. The temperature coefficient of resonant frequency (τf) shifted to a positive value with increasing Bi2O3 content. The dielectric properties (εr, Q·f0, τf) of Ca[(Li1/3Nb2/3)0.95Ti0.05] O3-δ and Ca[(Li1/3 Nb2/3)0.8 Ti0.2]O3-δ with 5 wt.% Bi2O3 sintered at 900 °C for 3 were 20, 6500 GHz, -4 ppm/°C, and 35, 11,000 GHz, 13 ppm/°, respectively. The relationship between the microstructure and dielectric properties was studied by X-ray diffraction (XRD), and SEM.

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Microwave dielectric properties of Bi₂O₃-doped Ca[(Li_1/3Nb_2/3)_1-xTi_x] O_3-δ ceramics

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