Affiliation:
1. School of Mechanical & Electrical Engineering Chengdu University of Technology Chengdu 610059 China
2. Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices Huizhou University Huizhou Guangdong 516001 China
3. State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China
Abstract
Herein, nominal compositions of MgAl2–x(Zn2/3Nb1/3)xO4 (x = 0.00, 0.04, 0.08, 0.12, 0.16, 0.20, 0.30, 0.40, and 0.50) ceramics are synthesized using a solid‐phase reaction method. The (Mg/Zn)Al2O4 solid solution and second‐phase Mg4Nb2O9 greatly improve the microwave dielectric properties of the samples. Moreover, the second phase, ionic polarizability, and relative density affect the dielectric constant (εr) value. The quality factor (Qf) value is correlated with the packing fraction, achieving a maximum value of ≈563 000 GHz at x = 0.40. The temperature coefficient of the resonant frequency (τf) value is negatively correlated with the B‐site bond value. When x = 0.40, the nominal composition MgAl1.6(Zn2/3Nb1/3)0.4O4 ceramic exhibits good microwave dielectric properties: εr = 9.06, ultrahigh Qf = 563 000 GHz, and τf = –45 ppm °C−1.
Funder
State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals
Subject
Condensed Matter Physics,General Materials Science
Cited by
2 articles.
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