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Materials 2019, 12(5), 803; https://doi.org/10.3390/ma12050803

Effect of Microwave Sintering on the Properties of 0.95(Ca0.88Sr0.12)TiO3–0.05(Bi0.5Na0.5)TiO3 Ceramics

1,2
,
1,2
,
1,2
and
1,2,*
1
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
2
Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, China
*
Author to whom correspondence should be addressed.
Received: 21 January 2019 / Revised: 8 February 2019 / Accepted: 21 February 2019 / Published: 8 March 2019
(This article belongs to the Special Issue Conventional and Microwave Sintering Techniques in Materials)
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Abstract

Perovskite ceramics are a common microwave dielectric material, but the development and application of this material has been limited by the high, positive resonance frequency temperature coefficient and sintering temperature. Therefore, adjusting the temperature coefficient of the resonance frequency and reducing the sintering temperature have become important research directions. In this work, 0.95(Ca0.88Sr0.12)TiO3–0.05(Bi0.5Na0.5)TiO3 ceramics (referred to as 0.95CST-0.05BNT) were prepared by standard solid-state reaction and microwave sintering. Microwave sintering greatly shortened the sintering period and holding time. Moreover, the 0.95CST–0.05BNT ceramics showed more uniform grain size distribution, and microwave sintering reduced energy consumption in the experiment. Therefore, the temperature coefficient of the resonance frequency of MWS ceramics was reduced by 119 × 10−6 /℃. All of the ceramics, which were sintered at 1300 °C for 40 minutes, showed optimal microwave dielectric properties: εr = 187.6, Q × f = 8958 GHz, and τf = +520 × 10−6 /°C. View Full-Text
Keywords: dielectric properties; microwave sintering; temperature coefficient; ceramics dielectric properties; microwave sintering; temperature coefficient; ceramics
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Tian, L.; Nan, J.; Wang, H.; Shen, C. Effect of Microwave Sintering on the Properties of 0.95(Ca0.88Sr0.12)TiO3–0.05(Bi0.5Na0.5)TiO3 Ceramics. Materials 2019, 12, 803.

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