Microwave Dielectric Properties Of Bi-2(Li0.5ta1.5)O-7-Tio2-Based Ceramics For 5g Cellular Base Station Resonator Application

The solid-state sintering route was employed for the production of (1-x)Bi-2(Li0.5Ta1.5)O-7-xTiO(2) (x = 0, 0.02, 0.04, 0.06, 0.08) ceramics. The phase, microstructure and microwave dielectric properties of each ceramic composition were determined via X-ray diffraction, scanning electron microscopy and Haki Colmon resonator technique, respectively. The dielectric constant, tan delta and AC conductivity were also determined for the composition of x = 0.04. The TiO2 addition developed new phases of Bi3Ti4O12 and Bi3TaTiO9 for x = 0.04 along with Bi-2(Li0.5Ta1.5)O-7 phase which disappeared for x = 0.08. The tau(f) of Bi-2(Li0.5Ta1.5)O-7 was tuned through zero by TiO2 addition and good microwave dielectric properties epsilon(r)similar to 67.2, Q(u)f(o)similar to 13,767 GHz and tau(f) similar to -1.45ppm/degrees C can be obtained for the composition of x = 0.04 sintered at 1050 degrees C for 2 h. This ceramic composition is a suitable candidate for 5G cellular base station resonator application.