DIELECTRIC CERAMIC FOR MICROWAVE - OKI ELECTRIC IND CO LTD

Title:

DIELECTRIC CERAMIC FOR MICROWAVE

Document Type and Number:

Japanese Patent JPH0765627

Kind Code:

A

Abstract:

PURPOSE: To provide a dielectric ceramic for microwave whose dielectric constant (r) and no-load Q(Qu) are large when the coefficient of temperature is close to zero (ppm/°C).

CONSTITUTION: A dielectric ceramic for microwave comprises a lead oxide (PbO), calcium oxide (CaO), zirconium oxide (ZrO2), cerium oxide (CeO2) and manganese oxide (MuO2). The expression of the principal component is X(CawPb1-w)O+Y(ZrO2)+ZCeO2, where 47≤X≤55, 44.8≤Y≤53, 0<Z≤1 (unit is mol), and X+Y+Z=100, while the mol ratio of W is 0.25≤W≤0.45. MnO2 is added to the principal component by no more than 2wt.%.

Inventors:

AYUSAWA KAZUTOSHI
KATOU HIROYO
ARAI TORU

Application Number:

JP21013893A

Publication Date:

March 10, 1995

Filing Date:

August 25, 1993

Export Citation:

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Assignee:

OKI ELECTRIC IND CO LTD

International Classes:

C04B35/48; H01B3/12; H01P7/10; (IPC1-7): H01B3/12; C04B35/48; H01P7/10

Attorney, Agent or Firm:

Takashi Ogaki

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