Effects of processing parameters on the dielectric properties of Ca(Ti(0.95)Li(0.05))O(2.85)F(0.15) ceramics

Ceramics of composition Ca(Ti(0.95)Li(0.05))O(2.85)F(0.15) are elaborated starting from the nominal composition 0.95 CaTiO3 + 0.05CaLiF3. This powder mixture is finely milled and disc tablets of 13-mm diameter and about 1-mm thickness are prepared by cold isostatic pressing. The pellets are sintered...

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Bibliographic Details
Published in:Key engineering materials 2004-01, Vol.264-268, p.1281-1284
Main Authors: Mezroua, A, Taibi-Benziada, L
Format: Article
Language:English
Online Access:Get full text
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Summary:Ceramics of composition Ca(Ti(0.95)Li(0.05))O(2.85)F(0.15) are elaborated starting from the nominal composition 0.95 CaTiO3 + 0.05CaLiF3. This powder mixture is finely milled and disc tablets of 13-mm diameter and about 1-mm thickness are prepared by cold isostatic pressing. The pellets are sintered in free atmosphere at various temperatures (850, 950, 1000 or 1100DGC) during 2, 4, 6 or 8 hours. The optimal sintering temperature and holding time are respectively 950DGC and 4 hours. The permittivity Sr and the dielectric losses tan6 are followed as a function of temperature from 25DGC up to 500DGC at 100Hz or 1 kHz. Several dielectric phenomena are observed beyond 200DGC. The curves epsilon(r)-T are consistent with the specifications of class I capacitors.
ISSN:1013-9826