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Published in:
01-08-2014
MgO–TiO2–ZnO–CaO ceramics: effect of milling process on dielectric properties
Published in: Journal of Materials Science: Materials in Electronics | Issue 8/2014
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Abstract
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 εr, tanδ, and the temperature coefficient of capacitance (abbreviated as TCC). For that, three kinds of balls are tested: Ф1, Ф2 or Ф5 mm stabilised zirconia balls. For the samples milled by Ф2 mm balls for 10 h, the ceramics sintered at 1,270 °C showed favorable dielectric properties with εr = 22.6, tanδ = 1.3 × 10−5, and TCC = 19.1 ppm/°C.