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Abstract
Lead oxide additions (y) from 0 to 10 wt % were investigated in dielectric compositions of the solid-solution system : (1−x) Pb (Mg1/3Nb2/3)03 − x Pb (Zn1/3Nb2/3) 03. For x : 0 and x : 0.1, lead oxide lowers the firing temperature (900°C) and can prevent the formation of a parasite phase (pyrochlore type). Correlatively, an important improvement of the dielectric characteristics is observed in these ceramics which could be used as dielectrics in large capacitance multilayer ceramic capacitors.