New high-[var epsilon] and high-Q microwave dielectric ceramics: (1 - x)Ca(0.61)Nd(0.26)TiO(3) - xNd(Zn(0.5)Ti(0.5))O(3)

New high-[var epsilon] and high-Q microwave dielectric ceramics (1 - x)Ca(0.61)Nd(0.26)TiO(3) - xNd(Zn(0.5)Ti(0.5))O(3) (x = 0.00-0.40, referred to as (1 - x)CNT - xNZT) were prepared by conventional solid-state preparation route. Single orthorhombic perovskite phase was formed when x was not beyond 0.15. And a secondary phase Zn(2)TiO(4) appeared for x = 0.20, while ZnO was the secondary phase for the ceramics with x above 0.20. The dielectric constant and temperature coefficient of resonant frequency decreased steadily with increasing x-value. High Qf-value of above 10,000 GHz was achieved as x varied from 0.00 to 0.20. However, Qf-value decreased rapidly when x was beyond 0.20. Some (1 - x)CNT - xNZT ceramics with high [var epsilon] and high Qf value were obtained: [var epsilon] = 78.8, Qf = 19,200 GHz, t(f) = + 135 ppm/'C for x = 0.15; [var epsilon] = 71.8, Qf = 17,300 GHz, t(f) = + 94 ppm/'C for x = 0.20.