the effects of zno additive on sintering behavior, microstructural evolution and microwave dielectric properties of li2tio3 ceramics

The densification behavior, structural and microstructural evolution and microwave dielectric properties of li2tio3 + xzno (x = 0, 0.5, 1, 1.5, 2, 3, and 5 mol%) ceramics have been investigated using xray diffraction, field emission scanning electron microscopy, raman spectroscopy and microwave resonant measurement. the maximum density of 3.33 g/cm3 was obtained in li2tio3 + 2zno ceramic at low sintering temperature of 1100˚c. sem investigations revealed good close packing of grains when x = 2 and preferential grain growth when x ge; 3. the maximum values of q × f = 31800 ghz and epsilon;r = 22.5 were obtained in li2tio3 + 3zno and li2tio3 + 2zno compositions, respectively. the observed properties are attributed to the microstructural evolution and grain growth (first case) or high density of the obtained ceramic (second case).