Title:
高周波用誘電体磁器組成物、誘電体共振器、誘電体フィルタ、誘電体デュプレクサ、及び通信機装置
Document Type and Number:
Japanese Patent JP4596004
Kind Code:
B2
Abstract:
A high-frequency dielectric ceramic composition that has excellent dielectric properties, such as a large epsilonr, a large Q-value, and a small absolute value of tauf, even in a high-frequency region, such as a microwave region or a millimeter wave region, and that can be fired at 1400° C. or less, which is much lower than before, is provided. The high-frequency dielectric ceramic composition contains 100 parts by weight of main component and 0.005-0.300 parts by weight (on a B2O3 basis) of accessory boron compound. The main component has a composition formula of (1-y)xCaTiaO1+2a-(1-y)(1-x)Ca(M1z/3M22/3)bO1+2b-yLnAlcO(3+3c)/2, wherein x and y denote moles , and x, y, z, a, b, c, and alpha (wherein alpha=(1-y)x) satisfy the following relationships: 0.56<=x<=0.8, 0.08<=y<=0.18, 0.980<=z<1.000, alpha<=0.65, 0.985<=a<=1.05, 0.9<=b<=1.02, and 0.9<=c<=1.05.
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Inventors:
Tatsuya Ishikawa
Application Number:
JP2007508030A
Publication Date:
December 08, 2010
Filing Date:
February 02, 2006
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
C04B35/46; H01B3/12; H01P1/20; H01P1/213; H01P7/10
Domestic Patent References:
| JP2002029837A | 2002-01-29 | |||
| JP2001163665A | 2001-06-19 | |||
| JP2001192265A | 2001-07-17 |
Attorney, Agent or Firm:
Hajime Ohara