Patent ID: 6187707
Filing Date: 2001-02-13
Classification: C04B,H01C

Abstract:
A barium titanate-based semiconductive ceramic composition comprising a major component composed of barium titanate or a solid solution thereof, a semiconductivity-imparting agent, and an additive;wherein a fraction of the Ba in BaTiO.sub.3 as the major component is replaced with 1 to 25 mole percent of Ca, 1 to 30 mole percent of Sr, and 1 to 50 mole percent of Pb; andwherein to 100 mole percent of the major component,the semiconductivity-imparting agent is added in an amount of 0.2 to 1.0 mole percent as a converted element content, andthe additive comprises manganese oxide in an amount of 0.01 to 0.10 mole percent as a converted Mn content, silica in an amount of 0.5 to 5 mole percent as a converted SiO.sub.2 content, and magnesium oxide in an amount of 0.028 to 0.093 mole percent as a converted Mg content.