a dielectric ceramic composition is disclosed , comprising as three components lead nickel niobate , lead titanate , and lead magnesium iron tungstate , wherein the composition in terms of the three components is represented by the formula xo . sub . 3 ]. y . z [ pb ( mg . sub . 1 / 4 fe 1 / 4 w 1 / 2 ) o 3 ] wherein x + y + z = 1 . 00 , x , y , and z are within the polyhedral area formed by lines connecting points a , b , c , d , and e of an x - y - z ternary phase diagram . the composition can be sintered at a relatively low temperature , has a high dielectric constant , and is useful as a material for condensers and electrostriction elements .