Effect of B₂O₃ Additions and Sintering Temperature on Microwave Dielectric Properties of (1 − x)La(Mg_0.5Sn_0.5)O₃-xCa_0.8Sr_0.2TiO₃ Ceramic

Abstract

The microwave dielectric properties of B₂O₃-doped (1 − x)La(Mg_0.5Sn_0.5)O₃-xCa_0.8Sr_0.2TiO₃ ceramics were investigated with a view to their potential for mobile communication devices. The B₂O₃-doped (1 − x)La(Mg_0.5Sn_0.5)O₃-xCa_0.8Sr_0.2TiO₃ ceramics were prepared by the conventional solid-state method. A dielectric constant of 39.5, a quality factor (Q × f) of 23,200 GHz, and a temperature coefficient of resonant frequency (τ_f ) of 0 ppm/°C were obtained for 1.0 wt% B₂O₃-doped 0.4La(Mg_0.5Sn_0.5)O_3–0.6Ca_0.8Sr_0.2TiO₃ ceramics that were sintered at 1400°C for 4 h.

Keywords:

• Ceramics
• X-ray diffraction
• Microwave dielectric properties

Acknowledgment

This work was supported by the National Science Council of the Republic of China under Grant NSC 99-2622-E-262–003-CC3.

Communicated by Dr. George W. Taylor