Effect of Al2O3 addition on microwave dielectric properties of BaCo0.194Zn0.116Nb0.69O3 ceramics

Peijun Liao; Tai Qiu; Jian Yang; Xinyi Lu

doi:10.1007/s13391-013-3063-9

Effect of Al₂O₃ addition on microwave dielectric properties of BaCo_0.194Zn_0.116Nb_0.69O₃ ceramics

Peijun Liao, Tai Qiu, Jian Yang, Xinyi Lu

College of Materials Science and Engineering

Nanjing Tech University

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

14 Scopus citations

Abstract

This study investigates the effects of Al₂O₃ addition on sintering, microstructures, phase formation and the microwave dielectric properties of BaCo_0.194Zn_0.116Nb_0.69O₃ (BCZN) ceramics prepared by the conventional solidstate route. Addition of low alumina content was found to effectively improve the Q×f value of BCZN ceramics. Addition of an appropriate amount of Al₂O₃ was found beneficial to the growth and uniformity of the ceramic grain, significantly improving the quality factor of BCZN ceramics. However, the performance of the ceramics deteriorated when an excessive secondary phase, inhomogeneous grain of small size and larger porosity were generated from the BCZN ceramic doped with excessive alumina. An optimum Q × f of 61056 GHz (f = 7.44 GHz) was obtained for the BCZN ceramic doped with 1 wt. % Al₂O₃ addition sintered at 1350°C for 3 h, which is markedly better than that of pure BCZN ceramic sintered at 1300°C for 3 h (13650 GHz, f = 7.02 GHz).

Original language	English
Pages (from-to)	121-125
Number of pages	5
Journal	Electronic Materials Letters
Volume	10
Issue number	1
DOIs	https://doi.org/10.1007/s13391-013-3063-9
State	Published - Jan 2014

Keywords

BCZN ceramics
alumina
grain size
grain uniformity
quality factor

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title = "Effect of Al2O3 addition on microwave dielectric properties of BaCo0.194Zn0.116Nb0.69O3 ceramics",

abstract = "This study investigates the effects of Al2O3 addition on sintering, microstructures, phase formation and the microwave dielectric properties of BaCo0.194Zn0.116Nb0.69O3 (BCZN) ceramics prepared by the conventional solidstate route. Addition of low alumina content was found to effectively improve the Q×f value of BCZN ceramics. Addition of an appropriate amount of Al2O3 was found beneficial to the growth and uniformity of the ceramic grain, significantly improving the quality factor of BCZN ceramics. However, the performance of the ceramics deteriorated when an excessive secondary phase, inhomogeneous grain of small size and larger porosity were generated from the BCZN ceramic doped with excessive alumina. An optimum Q × f of 61056 GHz (f = 7.44 GHz) was obtained for the BCZN ceramic doped with 1 wt. % Al2O3 addition sintered at 1350°C for 3 h, which is markedly better than that of pure BCZN ceramic sintered at 1300°C for 3 h (13650 GHz, f = 7.02 GHz).",

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AU - Liao, Peijun

AU - Qiu, Tai

AU - Yang, Jian

AU - Lu, Xinyi

PY - 2014/1

Y1 - 2014/1

N2 - This study investigates the effects of Al2O3 addition on sintering, microstructures, phase formation and the microwave dielectric properties of BaCo0.194Zn0.116Nb0.69O3 (BCZN) ceramics prepared by the conventional solidstate route. Addition of low alumina content was found to effectively improve the Q×f value of BCZN ceramics. Addition of an appropriate amount of Al2O3 was found beneficial to the growth and uniformity of the ceramic grain, significantly improving the quality factor of BCZN ceramics. However, the performance of the ceramics deteriorated when an excessive secondary phase, inhomogeneous grain of small size and larger porosity were generated from the BCZN ceramic doped with excessive alumina. An optimum Q × f of 61056 GHz (f = 7.44 GHz) was obtained for the BCZN ceramic doped with 1 wt. % Al2O3 addition sintered at 1350°C for 3 h, which is markedly better than that of pure BCZN ceramic sintered at 1300°C for 3 h (13650 GHz, f = 7.02 GHz).

AB - This study investigates the effects of Al2O3 addition on sintering, microstructures, phase formation and the microwave dielectric properties of BaCo0.194Zn0.116Nb0.69O3 (BCZN) ceramics prepared by the conventional solidstate route. Addition of low alumina content was found to effectively improve the Q×f value of BCZN ceramics. Addition of an appropriate amount of Al2O3 was found beneficial to the growth and uniformity of the ceramic grain, significantly improving the quality factor of BCZN ceramics. However, the performance of the ceramics deteriorated when an excessive secondary phase, inhomogeneous grain of small size and larger porosity were generated from the BCZN ceramic doped with excessive alumina. An optimum Q × f of 61056 GHz (f = 7.44 GHz) was obtained for the BCZN ceramic doped with 1 wt. % Al2O3 addition sintered at 1350°C for 3 h, which is markedly better than that of pure BCZN ceramic sintered at 1300°C for 3 h (13650 GHz, f = 7.02 GHz).

KW - BCZN ceramics

KW - alumina

KW - grain size

KW - grain uniformity

KW - quality factor

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Effect of Al₂O₃ addition on microwave dielectric properties of BaCo_0.194Zn_0.116Nb_0.69O₃ ceramics

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Keywords

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