Dielectric ceramic compositions based on magnesium, calcium and rare earth metal titanates

Patent · Tue Dec 30 04:00:00 EST 1980

OSTI ID:6830870

Katsube, M; Tamura, H

A dielectric ceramic composition for microwave applications consists essentially of a sintered mixture represented by the general formula: (1-x)MgTiO3-x(CA1-ymey)TiO3 wherein me is at least one rare earth element selected from the group of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and wherein X and Y are molar fractions of respective components and take values within the following respective ranges: 0.03 < or = X < or = 0.15, 0.001 < or = Y < or = 0.06. The composition is a fine-grained, dence ceramic and enables to produce microwave devices with high permittivity, high quality factor and small temperature coefficient of resonance frequency.

• Assignee: Murata Manufacturing Co Ltd (Japan)
• Patent Number(s): US 4242213
• OSTI ID: 6830870
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
&amp; Refractories-- Preparation &amp; Fabrication
360204* -- Ceramics
Cermets
&amp; Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CERAMICS
DIELECTRIC MATERIALS
ELECTRONIC EQUIPMENT
EQUIPMENT
MAGNESIUM COMPOUNDS
MATERIALS
MICROWAVE EQUIPMENT
OXYGEN COMPOUNDS
PERMITTIVITY
RARE EARTH COMPOUNDS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS