MgO-TiO2-ZnO-CaO ceramics: effect of milling process on dielectric properties

The effect of grain size on the dielectric properties of MgO-TiO2-ZnO-CaO ceramics is investigated. Attrition milling is chosen to obtain nanometre particle size from micrometre particle size powders. Additionally, the present study is focused on the effect of the nature of milling balls on epsilon(r), tan delta, and the temperature coefficient of capacitance (abbreviated as TCC). For that, three kinds of balls are tested: Dcurrency sign1, Dcurrency sign2 or Dcurrency sign5 mm stabilised zirconia balls. For the samples milled by Dcurrency sign2 mm balls for 10 h, the ceramics sintered at 1,270 A degrees C showed favorable dielectric properties with epsilon(r) = 22.6, tan delta = 1.3 x 10(-5), and TCC = 19.1 ppm/A degrees C.