T. Ebadzadeh - Materials and Energy Research Center
S. Ghaffari - Materials and Energy Research Center
M. Alizadeh - Materials and Energy Research Center
K. Asadian - Materials and Energy Research Center
Y. Ganjkhanlou - University of Pardubice

The densification behavior, structural and microstructural evolution and microwave dielectric properties of Li۲TiO۳ + xZnO (x = ۰, ۰.۵, ۱, ۱.۵, ۲, ۳, and ۵ mol%) ceramics have been investigated using X-ray diffraction, Field Emission Scanning Electron Microscopy, Raman spectroscopy and microwave resonant measurement. The Maximum density of ۳.۳۳ g/cm۳ was obtained in Li۲TiO۳ + ۲ZnO ceramic at low sintering temperature of ۱۱۰۰˚C. SEM investigations revealed good close packing of grains when x = ۲ and preferential grain growth when x ≥ ۳. The maximum values of Q × f = ۳۱۸۰۰ GHz and εr = ۲۲.۵ were obtained in Li۲TiO۳ + ۳ZnO and Li۲TiO۳ + ۲ZnO 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).

Li۲TiO۳, ZnO addition, Microwave dielectric properties, Microstructure, Sintering