| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dielectric ceramic capable of giving a laminated ceramic capacitor excellent in life characteristics when used as a dielectric layer, and a laminated ceramic capacitor excellent in reliability (life characteristics) which is obtained by forming a dielectric layer using the dielectric ceramic. <P>SOLUTION: The dielectric ceramic is constituted to comprise a sintered compact containing a BaTiO<SB POS="POST">3</SB>-based ceramic particle as a main phase particle, the BaTiO<SB POS="POST">3</SB>-based ceramic particle having a shell part and a core part and containing, as accessory components, R (at least one member selected from Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Y) and M (at least one member selected from Mg, Mn, Ni, Co, Fe, Cr, Cu, Al, Mo, W and V), wherein R and M exist in the shell part of the BaTiO<SB POS="POST">3</SB>-based ceramic particle, and a total concentration of R and M has a gradient from the grain boundary toward the core part and has a part C2, which is a minimum, and a part C3, which is a maximum. <P>COPYRIGHT: (C)2012,JPO&INPIT |
