Patent number: 7580242
Abstract: The invention aims at providing a dielectric ceramic composition including BamTiO2+m where “m” satisfies 0.99?m?1.01 and BanZrO2+n where “n” satisfies 0.99?n?1.01, an oxide of Mg, an oxide of R where R is at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, an oxide of at least one element selected from Mn, Cr, Co and Fe, and an oxide of at least one element selected from Si, Li, Al, Ge and B. 35 to 65 moles of BanZrO2+n, 4 to 12 moles of an oxide of Mg, 4 to 15 moles of an oxide of R, 0.5 to 3 moles of an oxide of Mn, Cr, Co and Fe, and 3 to 9 moles of an oxide of Si, Li, Al, Ge and B are included therein per 100 moles of the BamTiO2+m.
Type:
Grant
Filed:
February 21, 2008
Date of Patent:
August 25, 2009
Assignee:
TDK Corporation
Inventors:
Sanshiro Aman, Takashi Kojima, Mari Miyauchi, Masakazu Hosono, Dan Sakurai, Kosuke Takano, Nobuto Morigasaki