文摘
The effect of Li2O-Al2O3-B2O3 (LAB) glass addition on phase composition, microstructure and the microwave dielectric properties of Li2ZnTi3O8 ceramics with TiO2 were investigated using x-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDS) and a vector network analyzer. With the addition of 17?mol% TiO2 on Li2ZnTi3O8 ceramics, the temperature coefficient of the resonant frequency (τ ?) value could be adjusted to +3.3?ppm/°C. When a small amount of LAB glass was added to the Li2ZnTi3O8?+?17?mol% TiO2 materials, the sintering temperature could be significantly lowered from 1160°C to 900°C. With increasing the LAB glass, the Q?×?f value first increased and then decreased. Typically, the 1 wt.% LAB glass-added Li2ZnTi3O8?+?17?mol% TiO2 ceramics sintered at 900°C for 4?h had good microwave dielectric properties with εr?=?26.8, Q?×?f?=?28,000?GHz and τ ??=?+?2.5?ppm/°C, which made it a promising ceramic for LTCC technology application.