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Phase equilibria in the BaTiO3–La2TiO5–TiO2 system

Published online by Cambridge University Press:  31 January 2011

Srečo Škapin ,
Drago Kolar ,
Danilo Suvorov  and
Zoran Samardžija
Srečo Škapin
Affiliation:
Department of Ceramics, “Jožef Stefan” Institute, Jamova 39, 1111 Ljubljana, Slovenia
Drago Kolar
Affiliation:
Department of Ceramics, “Jožef Stefan” Institute, Jamova 39, 1111 Ljubljana, Slovenia
Danilo Suvorov
Affiliation:
Department of Ceramics, “Jožef Stefan” Institute, Jamova 39, 1111 Ljubljana, Slovenia
Zoran Samardžija
Affiliation:
Department of Ceramics, “Jožef Stefan” Institute, Jamova 39, 1111 Ljubljana, Slovenia
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Abstract

Subsolidus phase relations in the BaTiO3–La2TiO5–TiO2 part of the ternary BaO–La2O3–TiO2 system at 1300 °C in air were determined. The phases were characterized by x-ray diffraction, scanning electron microscopy, and electron probe wavelength dispersive spectroscopic microanalysis. A combination of techniques was employed because of insensitivity in detecting secondary phases by x-ray diffraction. The location and extent of Ba6−xLa8+2x/3Ti18O54 ternary solid solution 0.2(1) ⩽ x ⩽ 2.3(1) and Ba1−yLayTi1−y/4 (VTi)y/4O3 binary solid solution 0 ⩽ y ⩽ 0.3 at 1300 °C was established. Tie lines between various barium polytitanates with a sequence of Ba6−xLa8+2x/3Ti18O54 solid solution regions were determined.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 5 , May 1998 , pp. 1327 - 1334
Copyright
Copyright © Materials Research Society 1998

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