Low-firing and microwave dielectric properties of Na 2 YMg 2 V 3 O 12 ceramic

Abstract A low-firing microwave dielectric ceramic Na 2 YMg 2 V 3 O 12 with garnet structure was prepared via the conventional solid-state reaction method. X-ray diffraction data shows that Na 2 YMg 2 V 3 O 12 ceramic crystallized into a cubic garnet structure with a space group Ia-3d . Dense Na 2 YMg 2 V 3 O 12 ceramic with a relative density of 95.4% could be obtained when sintered at 850 °C and exhibited the optimum microwave properties with a relative permittivity of 12.3, a quality factor of 23,180 GHz (at 10.2 GHz), and a nearly zero τ f value of −4.1 ppm/°C. Na 2 YMg 2 V 3 O 12 was found to be chemically compatible with silver electrode when sintered at 850 °C. These merits make Na 2 YMg 2 V 3 O 12 a good microwave dielectric ceramic with potential applications in LTCC technology.