| 摘要 |
PROBLEM TO BE SOLVED: To obtain a dielectric porcelain having a high relative dielectric constant even when the crystal grains are made fine and having good temp. characteristics of the relative dielectric constant. SOLUTION: The dielectric porcelain consists of perovskite type crystal grains 1 contg. at least Pb, Ni, Nb and Ti as metallic elements and having 0.2-1.0 μm average grain diameter. Each of the perovskite type crystal grains 1 consists of a core part 2 and a shell part 3 enclosing the core part 2 and more Ti exists in the shell part 3 than in the core part 2. Each of the core part 2 and the shell part 3 preferably comprises a solid soln. of Pb(Ni1/3 Nb2/3 )O3 and PbTiO3 . |
