Abstract
A new thermally stable microwave dielectric ceramic with low‐firing temperature in (1−x)Li3Bi2P3O12–xTiO2 [(1−x)LBP–xT, 0 ≤ x ≤ 0.6] ceramics system was obtained using conventional solid‐state reaction method. The phase transformation, microstructure, and microwave dielectric properties of materials were investigated using X‐ray powder diffraction (XRD), scanning electron microscopy (SEM) , and a network analyzer. The LBP ceramic (x = 0) sintered at 725°C has optimum microwave dielectric properties with relative permittivity (εr) of 15.8, Q × f of 26 600 GHz and temperature coefficients of resonant frequency (τf) of −130 ppm/°C. The εr and τf of (1−x)LBP–xT ceramics were tailored with increasing x values. At x = 0.55, the ceramic exhibits improved microwave dielectric properties with εr = 22.1, Q × f = 14 900 GHz and τf = −2.6 ppm/°C.
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