High dielectric constant microwave dielectric ceramic(Na1/2Nd1/2)TiO3 was prepared by solid-state reaction method. The effects of sintering temperature on the microstructure and microwave dielectric properties of the prepared samples were investigated. The results show that the major phase of sample is cubic(Na1/2Nd1/2)TiO3 when sintered below 1 350 ℃, and the major phase is turned to tetragonal Nd0.667TiO3 when sintered above 1 350 ℃. With the increase of sintering temperature, the relative perimittivity a...