MICROWAVE DIELECTRIC-PROPERTIES OF Y2BA(CU1-XZNX)O-5 SOLID-SOLUTIONS

The microwave dielectric properties of Y2Ba(Cu1-xZnx)O-5(0 less than o r equal to x less than or equal to 1) solid solutions, prepared by the solid state reaction method, were studied in relation to the amount o f Zn substitutions, and measured using the Hakki and Coleman method. T he epsilon(r) and the tau(f) increased slightly, and the Q.f values ch anged nonlinearly as the amount of Zn substitution was increased. In p articular, it is shown that improved microwave dielectric properties w ith Q.f = 110665 GHz; epsilon(r) = 14.2 and epsilon(f) = -41.5 ppm/deg rees C are obtained for samples with x = 0.5, which also have few pore s and high relative density. Thus, it was concluded that the Q.f value s were closely related to the presence of pores in the samples.