Microstructure and microwave dielectric properties of Ba(Zn1/3Ta2/3)O3 ceramics with ZrO2 addition

Jung In Yang; Sahn Nahm; Chang Hack Choi; Hwack Joo Lee; Hyun Min Park

doi:10.1111/j.1151-2916.2002.tb00060.x

Microstructure and microwave dielectric properties of Ba(Zn_1/3Ta_2/3)O₃ ceramics with ZrO₂ addition

Jung In Yang, Sahn Nahm, Chang Hack Choi, Hwack Joo Lee, Hyun Min Park

Department of Materials Science and Engineering

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

84 Citations (Scopus)

Abstract

The effect of ZrO₂ on crystallographic order, microstructure, and microwave dielectric properties of Ba(Zn_1/3Ta_2/3)O₃ (BZT) ceramics was investigated. A small amount of ZrO₂ disturbed the 1:2 cation ordering. The average grain size of the BZT significantly increased with the addition of ZrO₂, which was attributed to liquid-phase formation. The relative density increased with the addition of a small amount of ZrO₂, but It decreased when the ZrO₂ content was increased. Variation of the dielectric constant with ZrO₂ addition ranged between 27 and 30, and the temperature coefficient of resonant frequency increased abruptly as the ZrO₂ amount exceeded 2.0 mol%. The Q value of the BZT significantly improved with the addition of ZrO₂, which could be explained by the increased relative density and grain size. The maximum Q×f value achieved in this investigation was ∼164 000 GHz for the BZT with 2.0 mol% ZrO₂ sintered at 1550°C for 10 h.

Original language	English
Pages (from-to)	165-168
Number of pages	4
Journal	Journal of the American Ceramic Society
Volume	85
Issue number	1
DOIs	https://doi.org/10.1111/j.1151-2916.2002.tb00060.x
Publication status	Published - 2002 Jan

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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title = "Microstructure and microwave dielectric properties of Ba(Zn1/3Ta2/3)O3 ceramics with ZrO2 addition",

abstract = "The effect of ZrO2 on crystallographic order, microstructure, and microwave dielectric properties of Ba(Zn1/3Ta2/3)O3 (BZT) ceramics was investigated. A small amount of ZrO2 disturbed the 1:2 cation ordering. The average grain size of the BZT significantly increased with the addition of ZrO2, which was attributed to liquid-phase formation. The relative density increased with the addition of a small amount of ZrO2, but It decreased when the ZrO2 content was increased. Variation of the dielectric constant with ZrO2 addition ranged between 27 and 30, and the temperature coefficient of resonant frequency increased abruptly as the ZrO2 amount exceeded 2.0 mol%. The Q value of the BZT significantly improved with the addition of ZrO2, which could be explained by the increased relative density and grain size. The maximum Q×f value achieved in this investigation was ∼164 000 GHz for the BZT with 2.0 mol% ZrO2 sintered at 1550°C for 10 h.",

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year = "2002",

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AU - Yang, Jung In

AU - Nahm, Sahn

AU - Choi, Chang Hack

AU - Lee, Hwack Joo

AU - Park, Hyun Min

PY - 2002/1

Y1 - 2002/1

N2 - The effect of ZrO2 on crystallographic order, microstructure, and microwave dielectric properties of Ba(Zn1/3Ta2/3)O3 (BZT) ceramics was investigated. A small amount of ZrO2 disturbed the 1:2 cation ordering. The average grain size of the BZT significantly increased with the addition of ZrO2, which was attributed to liquid-phase formation. The relative density increased with the addition of a small amount of ZrO2, but It decreased when the ZrO2 content was increased. Variation of the dielectric constant with ZrO2 addition ranged between 27 and 30, and the temperature coefficient of resonant frequency increased abruptly as the ZrO2 amount exceeded 2.0 mol%. The Q value of the BZT significantly improved with the addition of ZrO2, which could be explained by the increased relative density and grain size. The maximum Q×f value achieved in this investigation was ∼164 000 GHz for the BZT with 2.0 mol% ZrO2 sintered at 1550°C for 10 h.

AB - The effect of ZrO2 on crystallographic order, microstructure, and microwave dielectric properties of Ba(Zn1/3Ta2/3)O3 (BZT) ceramics was investigated. A small amount of ZrO2 disturbed the 1:2 cation ordering. The average grain size of the BZT significantly increased with the addition of ZrO2, which was attributed to liquid-phase formation. The relative density increased with the addition of a small amount of ZrO2, but It decreased when the ZrO2 content was increased. Variation of the dielectric constant with ZrO2 addition ranged between 27 and 30, and the temperature coefficient of resonant frequency increased abruptly as the ZrO2 amount exceeded 2.0 mol%. The Q value of the BZT significantly improved with the addition of ZrO2, which could be explained by the increased relative density and grain size. The maximum Q×f value achieved in this investigation was ∼164 000 GHz for the BZT with 2.0 mol% ZrO2 sintered at 1550°C for 10 h.

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Microstructure and microwave dielectric properties of Ba(Zn_1/3Ta_2/3)O₃ ceramics with ZrO₂ addition

Abstract

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