NaTaO3 microwave dielectric ceramic a with high relative permittivity and as an excellent compensator for the temperature coefficient of resonant frequency

NaTaO3 ferroelectric ceramics sintered at 1550 degrees C exhibit high relative permittivity and outstanding microwave dielectric properties of epsilon(r) = 113.76, Q x f = 8824 GHz, and tau(f) = +645 ppm/degrees C in the low-frequency band (3.5195 GHz). The high relative permittivity is advantageous for the miniaturization of modern wireless com-munication devices. A near zero temperature coefficient of the resonance frequency (tau(f) = +1.05 ppm/degrees C) and good microwave dielectric properties (Q x f = 54,680 GHz, epsilon(r) = 19.42) were obtained for 0.92MgTiO(3)-0.08NaTaO(3) ceramics. Moreover, the sintering temperature of MgTiO3 could be decreased from 1350 degrees C to 1200 degrees C. Hence, NaTaO3 is a high-potential microwave dielectric material for adjusting systems with a negative temperature coefficient of resonance frequency.