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Published in:

26-07-2016

Effects of ZrO2–ZnO on the sintering behavior and microwave dielectric properties of 0.65CaTiO3–0.35SmAlO3 ceramics

Authors: Lisong Hu, Hongqing Zhou, Qinglei Sun, Luchao Ren, Xianfu Luo, Yongkang Hu, Yunsheng Xia

Published in: Journal of Materials Science: Materials in Electronics | Issue 12/2016

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Abstract

The 0.65CaTiO3–0.35SmAlO3 (CTSA) ceramics were synthesized by the conventional solid-state reaction technique. The effects of ZrO2–ZnO additives on the phase compositions, densification, sintering temperature and microwave dielectric properties were investigated. It has been found that a perovskite phase is the main phase and a second phase CaZrTi2O7 appeared as ZrO2 content increasing to 1 wt % in CTSA ceramics. The appropriate ZrO2 and ZnO additions could not only effectively lower the sintering temperature of CTSA ceramics to 1340 °C, but also promote the densification and microwave dielectric properties. But excessive additives deteriorated the microstructures and comprehensive properties of samples. Typically, excellent microwave dielectric properties: ε r  = 44.65, Q × f = 38,600 GHz (at 5.0 GHz) and τ f  = −8.36 ppm/°C were obtained for CTSA ceramics sintered at 1340 °C doped with 0.5 wt% ZrO2 and 1 wt% ZnO.

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Metadata
Title
Effects of ZrO2–ZnO on the sintering behavior and microwave dielectric properties of 0.65CaTiO3–0.35SmAlO3 ceramics
Authors
Lisong Hu
Hongqing Zhou
Qinglei Sun
Luchao Ren
Xianfu Luo
Yongkang Hu
Yunsheng Xia
Publication date
26-07-2016
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 12/2016
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-016-5417-1