Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Reexamination Certificate
2008-11-07
2010-10-26
Group, Karl E (Department: 1793)
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
Reexamination Certificate
active
07820578
ABSTRACT:
The object of the present invention is to provide a method of production of dielectric ceramic composition which can lower the firing temperature without compensating the dielectric characteristics. The method of production according to the present invention is characterized by comprising steps of;preparing a dielectric oxide expressed by composition formula of [(CaxSr1-x)O]m[(TiyZr1-y-zHfz)O2] (x, y, z, and m in the formula are; 0.5≦x≦1.0, 0.01≦y≦0.10, 0<z≦0.20 and 0.90≦m≦1.04 respectively),mixing, with respect to 100 parts by weight of the dielectric ceramic composition, 1 to 10 parts by weight of a sintering aid and 0.1 to 1.5 parts by weight of sodium oxide, sodium carbonate or a mixture thereof in terms of Na2O, andfiring an obtained mixture; whereinsaid sintering aid comprises, with respect to 100 wt % of said sintering aid, 30 to 69 wt % of manganese compound in terms of MnO, 1 to 20 wt % of aluminum oxide in terms of Al2O3, and 30 to 50 wt % of silicon oxide in terms of SiO2.
REFERENCES:
patent: 6118648 (2000-09-01), Kojima et al.
patent: 6617273 (2003-09-01), Motoki et al.
patent: 7312172 (2007-12-01), Sasaki et al.
patent: 2006/0234853 (2006-10-01), Sasaki et al.
patent: 2007/0127140 (2007-06-01), Reichel et al.
patent: A-63-289707 (1988-11-01), None
patent: A-10-231169 (1998-09-01), None
patent: A-2003-212650 (2003-07-01), None
patent: A-2004-182534 (2004-07-01), None
patent: 2004217509 (2004-08-01), None
patent: A-2005-179105 (2005-07-01), None
patent: A-2007-67152 (2007-03-01), None
Iwasawa Kenta
Nonaka Tomoaki
Odashima Tsutomu
Sasaki Hiroshi
Takaishi Tetsuo
Group Karl E
Oliff & Berridg,e PLC
TDK Corporation
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