Title :
New ferroelectrics Ba1-xMx (Li2xAl 2-2x) O4-4xF4x (M=Pb,Sr)
Author :
Huang, Sui-Yang ; Von Der Mühll, R. ; Ravez, J. ; Hagenmuller, P.
Author_Institution :
Lab. de Chimie du Solide, Bordeaux I Univ., Talence, France
fDate :
30 Aug-2 Sep 1992
Abstract :
New ferroelectric ceramics Ba1-xMx(Li2x Al2-2x) O4-4F4x with x ∈ [0,0.07] for M=Pb and x ∈ [0.0.1] for M=Sr have been studied. The behavior of Tc with composition has been determined. For Pb T c decreases from 396 to 233 K when x rises from 0 to 0.04, and then, when x rises from 0.04 to 0.07, Tc increases from 233 to 320 K. The thermal variation of Ps (spontaneous polarization) has also been determined. The variation of Tc for the Sr compound is rather similar: Tc decreases first from 396 to 238 K when x rises from 0 to 0.05 and then remains constant when x increases up to 0.1
Keywords :
X-ray diffraction examination of materials; barium compounds; ceramics; ferroelectric Curie temperature; ferroelectric materials; lead compounds; permittivity; powder technology; pyroelectricity; strontium compounds; Ba1-xPbx(Li2xAl2-2x)O 4-4xF4x; Ba1-xSrx(Li2xAl2-2x)O 4-4xF4x; X-ray diffusion; dielectric constant; ferroelectric Curie point; ferroelectric ceramics; powder technology; pyroelectric coefficient; Ceramics; Composite materials; Crystalline materials; Crystals; Dielectric losses; Dielectric materials; Ferroelectric materials; Powders; Pyroelectricity; Solid state circuits;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300709
