Pembuatan Keramik Dielektrik Dari Sistem (ZnO-TiO2) Pada Suhu Sinter 1450°C dan Karakterisitiknya

Formation Dielectric Ceramic from (ZnO-TiOJ System at 1450'C Sintering Temperature and Their Characteristics, Synthesis of dielectric ceramics from (ZnO-TiOJ system at 145&'C and their characterization had been carried out. This investigation was done in order to knowthe possibility of the application of the ceramics for dielectric ceramics. The ceramics were produced by mixing powder ofZnO and Ti02 with the concentration in such away so that the concentration ofTiO? larger than thestoichiometric concentration ofZn2Ti04 andbysintering at I450"C. Characterization was carriedout through XRD, microstructural and electrical analyses. The XRDand microstructure analyses showed that the (ZnO-TiOJ system ceramics formed Zn2.xTi\.x04 solid solution which accompanied by theformation ofZn vacancy defect. No second phasefound in the ceramics. Lattice constant ofthe Zn2. xTii x04solid solution decreasedfollowing the increase ofthe concentration ofTi02 excess (expressed by x). The Ti02 excess affected the grain size of the Zn2.xTi, x04 ceramics although the effect was not significant. At high temperature, the excess of Ti02 increased the dielectric constant and dissipation factor. The ceramicsproduced in this work had relatively low dielectric constant and loss tangent and good stability in relation to temperature change, so they can be applied as ceramic substrate and capasitor dielectric.