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Innovations in Corrosion and Materials Science (Discontinued)

Editor-in-Chief

ISSN (Print): 2352-0949
ISSN (Online): 2352-0957

Thermal Stability and Phase Transitions in WO3-ZrO2 and WO3-TiO2 Composites

Author(s): Ludwik Gorski, Edward Iller and Marcin Konior

Volume 5, Issue 1, 2015

Page: [17 - 22] Pages: 6

DOI: 10.2174/2352094905666150317233857

Price: $65

Abstract

Complex sol-gel process was applied to synthesize WO3-ZrO2 and WO3-TiO2 composites at different ratio of oxides. These composites are used to obtain radionuclide W-Re generators important due to applications in nuclear medicine.

The structure of above composites depends on annealing temperature. At 800 °C specimens are fully crystalline containing separate oxides with crystallites of nanometric sizes. WO3 existing in monoclinic form stabilizes tetragonal ZrO2 form. Long time annealing at 1000 °C causes martensite type phase transition in ZrO2 from tetragonal to monoclinic form whereas in WO3-TiO2 composite in the same conditions phase transitions do not occur.

Keywords: Phase transitions, sol-gel method, W-Re generators, WO3-TiO2, WO3-ZrO2 composites, X-ray diffraction.

Graphical Abstract

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