Paper Title:
Lead Free CaTiO3-Based Ceramics: Sintering, Phase Transitions and Dielectric Properties
  Abstract

Various chemical compositions (1-x)CaTiO3+xMgF2+xLiF were prepared and dry-ground. The powder mixtures were pressed to pellets and co-fired at 900°C for 2h. The obtained ceramics were investigated by XRD, SEM, DSC and dielectric measurements. A new solid solution with nominal composition Ca1-xMgx(Ti1-xLix)O3-3xF3x occurred in the initial composition range 0 ≤ x ≤ 0.25. The fluoride additive MgF2+LiF lowered significantly the sintering temperature of pure CaTiO3. Above room temperature, one or two second order phase transitions were detected by DSC and confirmed by dielectric measurements. Moreover, below room temperature, a frequency peak dependent on the permittivity and losses was observed and the quantum paraelectric behaviour of CaTiO3 disappeared with increasing x. These oxifluorides could be of interest for electronic applications.

  Info
Periodical
Materials Science Forum (Volumes 636-637)
Edited by
Luís Guerra ROSA and Fernanda MARGARIDO
Pages
111-118
DOI
10.4028/www.scientific.net/MSF.636-637.111
Citation
L. Taïbi-Benziada, S. Nemouchi, "Lead Free CaTiO3-Based Ceramics: Sintering, Phase Transitions and Dielectric Properties", Materials Science Forum, Vols. 636-637, pp. 111-118, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Maciej Kozak, Ludwik Domka, Stefan Jurga
Abstract:The phase behaviour of lipid bilayer systems prepared with 1,2-distearoyl-sn-glycero-3- phosphocholine (DSPC) with...
257
Authors: H. Li, Ke Feng Cai, H.F. Wang, L. Wang, X.L. Li
Abstract:AgPb18SbTe20 nano-powders have been synthesized by a hydrothermal synthesis method at 180 °C for 20 h, using AgNO3, Pb(NO3)2, Sb(NO3)3,...
550
Authors: M. Helena Braga, Jorge A. Ferreira, C. Lopes, Luis Filipe Malheiros
Abstract:The aim of this study is to determine the thermodynamic influence of the presence of Cu3SbS3, Cu2S and Sb2S3 in the formation of Cu12Sb4S13...
435
Authors: Sergey Kozyukhin, Alexey A. Sherchenkov
Abstract:Phase change memory materials of Ge-Sb-Te system [(GeTe)m(Sb2Te3)n (m : n = 1:1; 1:2; 2:1)] were studied during thermal cycling by...
22
Authors: Sheng Lin Liu, Xiu Juan Zhao, Rui Ming Ren
Chapter 1: Material Science
Abstract:Li4Ti5O12 spinel-type anode materials were synthesized by high-energy ball milling and solid-state method...
369