Title:
DIELECTRIC PORCELAIN COMPOSITION FOR HIGH FREQUENCY WAVE, DIELECTRIC RESONATOR, DIELECTRIC FILTER, DIELECTRIC DUPLEXER, AND COMMUNICATION EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2005/073148
Kind Code:
A1
Abstract:
[PROBLEMS] To provide a dielectric porcelain composition for a high frequency wave, which has a high &epsiv r and a high Q X f value and also exhibits a reduced absolute value of &tgr f, and thus exhibits excellent dielectric characteristics. [MEANS FOR SOLVING PROBLEMS] A dielectric porcelain composition which comprises 100 parts by weight of a primary component having a composition represented by an empirical formula: Ba&lcub MgaCo1-a)x(TabNb1-b)1-x&rcub vOw [w is a positive number required for the composition to have electrical neutrality as a porcelain], wherein a, b, x and v take respective numbers in the following ranges, respectively, 0.1 ≤ a ≤ 0.9, 0.1 ≤ b ≤ 0.9, 0.315 ≤ x ≤ 0.345 and 0.98 ≤ v ≤ 1.03, and 0.001 to 1.0 parts by weight of CuO and/or CeO2 as a sub-component.
Inventors:
ADACHI HIROSHIGE (JP)
Application Number:
PCT/JP2005/000030
Publication Date:
August 11, 2005
Filing Date:
January 05, 2005
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
ADACHI HIROSHIGE (JP)
ADACHI HIROSHIGE (JP)
International Classes:
C04B35/495; H01B3/12; H01P1/20; H01P1/203; H01P7/10; (IPC1-7): C04B35/495; H01B3/12; H01P1/20; H01P7/10
Foreign References:
| JPS61224211A | 1986-10-04 | |||
| JPH02137760A | 1990-05-28 | |||
| JP2001181029A | 2001-07-03 | |||
| JP2002029837A | 2002-01-29 |
Attorney, Agent or Firm:
Ohara, Hajime (14-14 Shinyokohama 2-chome, Kohoku-k, Yokohama-shi Kanagawa 33, JP)
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