Microwave Sintering and Microwave Dielectric Properties of (1- x)Ca0.61La0.26TiO3- x Nd(Mg0.5Ti0.5)O3 Ceramics

Shuwei Yang; Bingliang Liang; Changhong Liu; Jin Liu; Caisheng Fang; Yunlong Ai

doi:10.3390/ma14020438

Microwave Sintering and Microwave Dielectric Properties of (1- x)Ca_0.61La_0.26TiO₃- x Nd(Mg_0.5Ti_0.5)O₃ Ceramics

Materials (Basel). 2021 Jan 17;14(2):438. doi: 10.3390/ma14020438.

Authors

Shuwei Yang^{1

2}, Bingliang Liang^{1

2}, Changhong Liu^{1

2}, Jin Liu², Caisheng Fang², Yunlong Ai²

Affiliations

¹ Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang 330063, China.
² School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China.

Abstract

The (1-x)Ca_0.61La_0.26TiO₃-xNd(Mg_0.5Ti_0.5)O₃ [(1-x)CLT-xNMT, x = 0.35~0.60] ceramics were prepared via microwave sintering. The effects of sintering temperature and composition on the phase formation, microstructure, and microwave dielectric properties were investigated. The results show that the microwave sintering process requires a lower sintering temperature and shorter sintering time of (1-x)CLT-xNMT ceramics than conventional heating methods. All of the (1-x)CLT-xNMT ceramics possess a single perovskite structure. With the increase of x, the dielectric constant (ε) shows a downward trend; the quality factor (Qf) drops first and then rises significantly; the resonance frequency temperature coefficient (τ_f ) keeps decreasing. With excellent microwave dielectric properties (ε = 51.3, Qf = 13,852 GHz, τ_f = -1.9 × 10^-6/°C), the 0.65CLT-0.35NMT ceramic can be applied to the field of mobile communications.

Keywords: (1–x)CLT-xNMT ceramics; lattice constant; microwave dielectric properties; microwave sintering.

Abstract

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