Dielectric properties of Pb(Mg/sub 1/3/V/sub 2/3/)O/sub 3/-PbZrO/sub 3/ ceramics

Sintering and dielectric properties of a new perovskite compounds, Pb[(Mg/sub 1/3/V/sub 2/3/)/sub 1-x/Zr/sub x/]O/sub 3/ (x=0, 0.25, 0.5 and 0.75) ceramics, under an oxygen atmosphere sintering condition have been studied. The Pb[(Mg/sub 1/3/V/sub 2/3/)/sub 1-x/Zr/sub x/]O/sub 3/ ceramics system can be fired at lower than 950/spl deg/C. Perovskite phases are not confirmed in the Pb(Mg/sub 1/3/V/sub 2/3/)O/sub 3/ and Pb[(Mg/sub 1/3/V/sub 2/3/)/sub 0.75/Zr/sub 0.25/]O/sub 3/ ceramics. Pure perovskite phase ceramics are obtained with a Pb[(Mg/sub 1/3/V/sub 2/3/)/sub 0.25/Zr/sub 0.75/]O/sub 3/ composition. Dielectric constant and dissipation factors of the Pb[(Mg/sub 1/3/V/sub 2/3/)/sub 0.25/Zr/sub 0.75/]O/sub 3/ sample at 100 KHz are 187 and 2.2% at 25/spl deg/C. Curie temperature (Tc) of the Pb[(Mg/sub 1/3/V/sub 2/3/)/sub 0.25/Zr/sub 0.75/]O/sub 3/ ceramics is 202/spl deg/C which is lower than that of pure PbZrO/sub 3/.