Low-Temperature Sintering and Microwave Dielectric Properties of (Ca0.9Mg0.1)SiO3 Ceramic with Li2CO3 Addition

Xin Hui Zhao; Min Jia Wang; Qi Long Zhang; Hui Yang

doi:10.4028/www.scientific.net/KEM.602-603.748

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Low-Temperature Sintering and Microwave Dielectric...

Low-Temperature Sintering and Microwave Dielectric Properties of (Ca_0.9Mg_0.1)SiO₃Ceramic with Li₂CO₃ Addition

Abstract:

(Ca_0.9Mg_0.1)SiO₃ceramics possess a low dielectric constant and a high Qf value, however, the densification temperature of (Ca_0.9Mg_0.1)SiO₃ceramics is higher than 1280°C. In this paper, the effect of Li₂CO₃ addition on sinterability and dielectric properties of (Ca_0.9Mg_0.1)SiO₃ceramics were studied. The phase presence and surface morphology were determined by XRD and SEM techniques, respectively. CaSiO₃ and Ca₂MgSi₂O₇ phases were observed. With the addition of >2.0 wt% Li₂CO₃, the sintering temperature of (Ca_0.9Mg_0.1)SiO₃ ceramic was significantly lowered, reaching to 1070°C. (Ca_0.9Mg_0.1)SiO₃ceramics with 4wt% Li₂CO₃ sintered at 1070°C for 3 h shows excellent dielectric properties: ε_r=5.91, Qf = 15300GHz (at 10GHz).

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Key Engineering Materials (Volumes 602-603)

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748-751

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https://doi.org/10.4028/www.scientific.net/KEM.602-603.748

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March 2014

Authors:

Xin Hui Zhao, Min Jia Wang, Qi Long Zhang*, Hui Yang

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(Ca_0.9Mg_0.1)SiO₃ Ceramics, Dielectric Property, Sintering Aid

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