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

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.
Authors:
;
Publication Date:
OSTI Identifier:
6830870
Report Number(s):
US 4242213
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 19 Apr 1978, Japan
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; DIELECTRIC MATERIALS; MICROWAVE EQUIPMENT; CALCIUM COMPOUNDS; MAGNESIUM COMPOUNDS; PERMITTIVITY; RARE EARTH COMPOUNDS; TITANATES; ALKALINE EARTH METAL COMPOUNDS; ELECTRONIC EQUIPMENT; EQUIPMENT; MATERIALS; OXYGEN COMPOUNDS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS 360204* -- Ceramics, Cermets, & Refractories-- Physical Properties; 360201 -- Ceramics, Cermets, & Refractories-- Preparation & Fabrication