The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2009
Filed:
Mar. 22, 2006
Ryuichi Saito, Osaka, JP;
Hiroshi Kagata, Osaka, JP;
Hidenori Katsumura, Hyogo, JP;
Muneyuki Sawada, Osaka, JP;
Ryuichi Saito, Osaka, JP;
Hiroshi Kagata, Osaka, JP;
Hidenori Katsumura, Hyogo, JP;
Muneyuki Sawada, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A dielectric porcelain composition of the present invention includes a first component and second component. If the first component is represented by the general formula of xBaO-yNdO-zTiO-wBiO(provided that x+y+z+w=100), x, y, z, and w satisfy 12≦x≦16, 12≦y≦16, 65≦z≦69, and 2≦w≦5, respectively. The second component includes 30 to 37 wt % of BaO, 33 to 46 wt % of SiO, 8 to 12 wt % of LaO, 3 to 7 wt % of AlO, 0 to 1 wt % of SrO, 0 to 10 wt % of LiO, 0 to 20 wt % of ZnO, and 7 wt % or less of B0. The compounding ratio of the second component is between 10 wt % and 30 wt % when the sum of the first and second components is 100. In addition, 0.1 to 1 parts by weight of LiO and 3 to 10 parts by weight of ZnO, relative to 100 parts by weight of the sum of the first and second components, is also contained as a third component. An average particle diameter of the dielectric mixed powder forming dielectric porcelain composition before firing is 0.9 μm or less.