NDLI: Effect of Al$_{2}$O$_{3}$ addition on microwave dielectric properties of BaCo$_{0.194}$Zn$_{0.116}$Nb$_{0.69}$O$

Content Provider	Springer Nature Link
Author	Liao, Peijun Qiu, Tai Yang, Jian Lu, Xinyi
Copyright Year	2014
Abstract	This study investigates the effects of Al$_{2}$O$_{3}$ addition on sintering, microstructures, phase formation and the microwave dielectric properties of BaCo$_{0.194}$Zn$_{0.116}$Nb$_{0.69}$O$_{3}$ (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 Al$_{2}$O$_{3}$ 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. % Al$_{2}$O$_{3}$ 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).
Starting Page	121
Ending Page	125
Page Count	5
File Format	PDF
ISSN	17388090
Journal	Electronic Materials Letters
Volume Number	10
Issue Number	1
e-ISSN	20936788
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-01-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	BCZN ceramics quality factor alumina grain size grain uniformity Optical and Electronic Materials Condensed Matter Physics Nanotechnology and Microengineering Characterization and Evaluation of Materials Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials

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