| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ceramic raw material powder which can be made into an electronic component such as a laminated ceramic capacitor, satisfying both the X7R characteristics prescribed in the EIAJ (Electronic Industries Association of Japan) specification and the B characteristics prescribed in the Japan Industrial Standard (JIS) specification, that is, excellent in temperature stability of the electrostatic capacity, having good characteristics including an insulation resistance value, a relative dielectric constant, or the like, and furthermore, having a long acceleration life of the insulation resistance. <P>SOLUTION: The ceramic raw material powder comprises main ingredient particles formed by barium titanate having on their surfaces a covering layer comprising a secondary ingredient additive. When an average radius of the main ingredient particles is (r), and an average thickness of the covering layer is Δr, the Δr is characteristically controlled within a range of 0.015r to 0.055r. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
