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MgTiO3–CaTiO3 composite is one of the most important commercial microwave dielectric ceramics. However, the significant nonlinear change in resonant frequency with temperature and the temperature dependence of its temperature coefficient of resonant frequency (τf) severely deteriorate the temperature stability of MgTiO3–CaTiO3 composite. In this study, the Ca2+ in CaTiO3 was partially substituted...
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