Structural variation and microwave dielectric properties of TiO2- doped Ba(Zn1/3Ta2/3)O3 ceramics

Min Han Kim; Sahn Nahm; Woo Sung Lee; Myong Jae Yoo; Nam Gi Gang; Hwack Joo Lee

doi:10.1016/j.jeurceramsoc.2003.12.005

Structural variation and microwave dielectric properties of TiO₂- doped Ba(Zn_1/3Ta_2/3)O₃ ceramics

Min Han Kim, Sahn Nahm, Woo Sung Lee, Myong Jae Yoo, Nam Gi Gang, Hwack Joo Lee

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

15 Citations (Scopus)

Abstract

The effect of TiO₂ on microstructure and microwave dielectric properties of Ba(Zn_1/3Ta_2/3 O₃ (BZT) ceramics was investigated. The addition of TiO₂ did not disturb the 1:2 ordering structure of the BZT ceramic. The average grain size significantly increased with the addition of TiO₂, which was attributed to the liquid phase formation. A small amount of TiO₂ increased the relative density. However, relative density decreased with the addition of the large amount of TiO₂ and it might be due to the abnormal grain growth. The Q value of the BZT significantly improved with the addition of the TiO₂ for the specimens sintered at 1580 °C and it could be explained by the increased relative density. However, for the specimens sintered at 1630 °C, Q value decreased with the addition of the TiO₂ which is attributed to the decrease of the relative density. The maximum Q×f value achieved in this investigation was about 135,000 GHz for the BZT with 1.0 mol.% TiO₂ sintered at 1580 °C for 10 h.

Original language	English
Pages (from-to)	3547-3552
Number of pages	6
Journal	Journal of the European Ceramic Society
Volume	24
Issue number	13
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2003.12.005
Publication status	Published - 2004 Oct

Bibliographical note

Funding Information:
This work was supported by the Ministry of Science and Technology through the project of Nano-Technology and one of the authors also acknowledges that this work was financially supported by the Ministry of Science and Technology through the NRL Project.

Keywords

Ba(Zn, Ta )O
Dielectric properties
Microstructure
TiO

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2003.12.005

Cite this

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title = "Structural variation and microwave dielectric properties of TiO2- doped Ba(Zn1/3Ta2/3)O3 ceramics",

abstract = "The effect of TiO2 on microstructure and microwave dielectric properties of Ba(Zn1/3Ta2/3 O3 (BZT) ceramics was investigated. The addition of TiO2 did not disturb the 1:2 ordering structure of the BZT ceramic. The average grain size significantly increased with the addition of TiO2, which was attributed to the liquid phase formation. A small amount of TiO2 increased the relative density. However, relative density decreased with the addition of the large amount of TiO2 and it might be due to the abnormal grain growth. The Q value of the BZT significantly improved with the addition of the TiO2 for the specimens sintered at 1580 °C and it could be explained by the increased relative density. However, for the specimens sintered at 1630 °C, Q value decreased with the addition of the TiO2 which is attributed to the decrease of the relative density. The maximum Q×f value achieved in this investigation was about 135,000 GHz for the BZT with 1.0 mol.% TiO2 sintered at 1580 °C for 10 h.",

keywords = "Ba(Zn, Ta )O, Dielectric properties, Microstructure, TiO",

author = "Kim, {Min Han} and Sahn Nahm and Lee, {Woo Sung} and Yoo, {Myong Jae} and Gang, {Nam Gi} and Lee, {Hwack Joo}",

note = "Funding Information: This work was supported by the Ministry of Science and Technology through the project of Nano-Technology and one of the authors also acknowledges that this work was financially supported by the Ministry of Science and Technology through the NRL Project.",

year = "2004",

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AU - Kim, Min Han

AU - Nahm, Sahn

AU - Lee, Woo Sung

AU - Yoo, Myong Jae

AU - Gang, Nam Gi

AU - Lee, Hwack Joo

N1 - Funding Information: This work was supported by the Ministry of Science and Technology through the project of Nano-Technology and one of the authors also acknowledges that this work was financially supported by the Ministry of Science and Technology through the NRL Project.

PY - 2004/10

Y1 - 2004/10

N2 - The effect of TiO2 on microstructure and microwave dielectric properties of Ba(Zn1/3Ta2/3 O3 (BZT) ceramics was investigated. The addition of TiO2 did not disturb the 1:2 ordering structure of the BZT ceramic. The average grain size significantly increased with the addition of TiO2, which was attributed to the liquid phase formation. A small amount of TiO2 increased the relative density. However, relative density decreased with the addition of the large amount of TiO2 and it might be due to the abnormal grain growth. The Q value of the BZT significantly improved with the addition of the TiO2 for the specimens sintered at 1580 °C and it could be explained by the increased relative density. However, for the specimens sintered at 1630 °C, Q value decreased with the addition of the TiO2 which is attributed to the decrease of the relative density. The maximum Q×f value achieved in this investigation was about 135,000 GHz for the BZT with 1.0 mol.% TiO2 sintered at 1580 °C for 10 h.

AB - The effect of TiO2 on microstructure and microwave dielectric properties of Ba(Zn1/3Ta2/3 O3 (BZT) ceramics was investigated. The addition of TiO2 did not disturb the 1:2 ordering structure of the BZT ceramic. The average grain size significantly increased with the addition of TiO2, which was attributed to the liquid phase formation. A small amount of TiO2 increased the relative density. However, relative density decreased with the addition of the large amount of TiO2 and it might be due to the abnormal grain growth. The Q value of the BZT significantly improved with the addition of the TiO2 for the specimens sintered at 1580 °C and it could be explained by the increased relative density. However, for the specimens sintered at 1630 °C, Q value decreased with the addition of the TiO2 which is attributed to the decrease of the relative density. The maximum Q×f value achieved in this investigation was about 135,000 GHz for the BZT with 1.0 mol.% TiO2 sintered at 1580 °C for 10 h.

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