Influence of calcination,sintering and composition upon microwave properties of the Ba6−xSm8+2x/3Ti18O54-type oxide

Dielectric ceramic compositions for microwave applications belonging to the (BaO) (Sm₂O₃) (TiO₂) ternary phase diagram were studied. Calcination, sintering, microwave properties and influence of secondary phases were investigated. By varying composition and/or sintering process, a high dielectric constant with low dielectric losses and modulable negative or positive temperature coefficient of the resonant frequency can be reach.