Measurements of dielectric constant and quality factor of Ba(Mg_1/3Ta_2/3)O₃ at X band frequencies

Abstract

Dielectric properties of Ba(Mg_1/3Ta_2/3)O₃ in forms of ceramic, single crystal fiber, and polyethylene composite at microwave frequencies were measured. The dielectric constants 23.33, 24.30, and 26.50 and the quality factors 8,050, 6,430, and larger than 2,000 at 10 GHz were measured for the ceramic, hot pressed ceramic and the fiber respectively. The powder was studied by forming composites of Ba(Mg_1/3Ta_2/3)O₃ -Polyethylene. It is found that the experimental dielectric constant values at X band frequencies fit reasonably well to the logarithmic mixture rule. A newly reported mixing equation by Wakino et al. was studied by comparing with our experimental results.