ZHANG Qilong, YANG Hui, TONG Jianxi

(Center of nano- science and technology of zhejiang univers ity,hangzhou 310027)

Abstract: The effects of ZnO addition on the s interability and dielectric properties of Ca [(Li_1/3Nb_2/3)_0.8Ti_0.2]O_{3- σ} have been inves tigated.The ZnO addition lowered the s intering temperature of Ca [(Li_1/3Nb_2/3)_0.8Ti_0.2]O_{3- σ}ceramics ineffectively However, The proper ZnO content could improve the Qf values , and the Qf values increased from 8730 to 11228Ghz when the ZnO content from 0 up to 3wt% . With the increase of ZnO content，the dielectric cons tant decreased，the τf Values were shifted toward negative direction, and the Qf value firs t increased and then decreased. The εr value of 37, Qf value of 11228GHz and τf τvalue of 0ppm/℃ were obtained for Ca [(Li_1/3Nb_2/3)_0.8Ti_0.2]O_{3- σ}ceramics with 3wt% ZnO s intered at 920℃ for 4h.

Keywords: Low- temperature s intering, microwave dielectric ceramic, dielectric properties , ZnO