Measurement of Dielectric Properties of Pb(Zr_(0.52)Ti_(0.48))O_3, Ba_(0.5)Sr_(0.5)Nb_2O_6, and BaTiO_3 Ferroelectric Ceramics at Microwave Frequencies

摘要

A modified resonant cavity method was developed to measure the dielectric properties of ferroelectric ceramics at microwave frequencies, which were difficult to be evaluated accurately because of the high dielectric constant and high dielectric loss. With the aid of low-loss reference ceramic, the dielectric constant and dielectric loss of the small-sized ferroelectric ceramic sample could be measured accurately from the difference between the resonant peaks (TE_(01δ) mode) with and without introducing the to-be-determined sample. The microwave dielectric properties of Pb(Zr_(0.52)Ti_(0.48))O_3, Ba_(0.5)Sr_(0.5)Nb_2O_6, and BaTiO_3 ferroelectric ceramics were measured between 3.4 and 4.9 GHz using this method, together with the temperature dependence.