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Title: Synthesis and structural characterization of Bi<sub>2</sub>O<sub>3</sub>-M<sub>2</sub>O<sub>3</sub> (M=Dy and Pr) binary systems
Authors: Ekhelikar, Srikant
Bichile, G K
Keywords: Solid electrolytes
Binary solid solutions
X-ray diffraction
Lattice parameter
Issue Date: Dec-2004
Publisher: CSIR
Series/Report no.: C25B 1/00
Abstract: The binary systems Bi<sub>2</sub>O<sub>3</sub>-Dy<sub>2</sub>O<sub>3</sub> and Bi<sub>2</sub>O<sub>3</sub>-Pr<sub>2</sub>O<sub>3</sub> have been investigated by doping Dy<sub>2</sub>O<sub>3 </sub>and Pr<sub>2</sub>O<sub>3 </sub>in the composition range 10 - 40 mole % prepared by ceramic method. From the phase evolution studies of Dy<sub>2</sub>O<sub>3 </sub>doped samples, it was observed that fluorite structured f c c phase is stabilized for the composition range 10-40 mole %. The stability of d- phase was affected by the heat treatment temperatures. The higher the content of dopant concentration, the higher was the sintering temperature. The lattice parameter for Dy<sub>2</sub>O<sub>3 </sub>doped samples decreased with the increase of dopant concentration and obeyed Vegard’s rule. From the structural studies of Pr<sub>2</sub>O<sub>3</sub> doped samples rhombohedral phase was found for 10 to 30 mole % of dopant concentrations. For 40 mole % of dopant concentration, the impurity peaks were observed in the XRD patterns along with rhombohedral phase. The unit cell parameters for Pr<sub>2</sub>O<sub>3 </sub>doped samples were evaluated on hexagonal settings.
Description: 912-915
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.42(12) [December 2004]

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