Abstract
The (Mg0.95M0.05)Ta2O6 (M=Ni, Zn, Mn) ceramics are prepared through the solid-state ceramic route and their microwave dielectric properties are investigated as a function of ionic radius difference of M and Mg. The forming of (Mg0.95M0.05)Ta2O6 solid solutions were confirmed by the XRD analysis and the measured lattice parameters and the ceramics showed a nonlinear variation of dielectric properties with the sintering temperature. In addition, the sintering temperature has slight effect on dielectric constant and temperature coefficient of resonant frequency, but significant on Q×f value. In particularly, (Mg0.95Ni0.05)Ta2O6 shows a relatively high Q×f of 88,300 GHz along with a dielectric constant of 28.73 and a τf of 44.9 ppm/°C, indicating the dielectric can be used for high-frequency applications.
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