Microwave Dielectric Properties of Mg_1/3Nb_2/3SnO₄ Ceramics

Abstract

The microwave dielectric properties of Mg_1/3Nb_2/3SnO₄ ceramics were investigated for possible mobile communication applications. The Mg_1/3Nb_2/3SnO₄ ceramics were prepared by conventional solid-state method with various sintering temperatures. The Mg_1/3Nb_2/3SnO₄ ceramics contained MgNb₂O₆ and MgNb₂SnO₈. The intensity of the Mg_1/3Nb_2/3SnO₄ ceramics increased with sintering temperature to a maximum at 1475°C. An apparent density of 5.95 g/cm³, a dielectric constant (ϵ _r ) of 8.32, a quality factor (Q × f) of 84,800 GHz, and a temperature coefficient of resonant frequency (τ _f ) of -11.1 ppm/^OC were obtained when Mg_1/3Nb_2/3SnO₄ was sintered at 1450°C for 4h.

Keywords:

• Mg_1/3Nb_2/3SnO₄
• dielectric constant
• quality factor
• temperature coefficient of resonant frequency

Acknowledgments

This work was supported by the National Science Council in Taiwan, under Grant NSC 100-2221-E-262-006-

Communicated by Dr. Deborah J. Taylor