ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Uranium tellurates, UTeO5 and UTe3O9 were prepared by heating UO2 + TeO2 and U3O8 + TeO2 in air/oxygen and the tellurite UTe3O8 by heating UO2 + TeO2 in vacuum sealed quartz ampoule. The compounds were characterized by X-ray diffraction (XRD) and thermogravimetry (TG). A new tellurite compound UTeO4 was synthesized. Their thermal stability was determined in oxygen, argon and argon-8%hydrogen in the temperature range of ambient temperature to 950°C. UTeO5 and UTe3O9 are stable in flowing oxygen up to 925 and 750°C, respectively under dynamic heating at 10 K/min. UTe3O9 decomposes in O2/Ar/Ar-8%H2 via formation of UTeO5, whereas UTe3O8 decomposes in Ar-8%H2 via formation of UTeO4. UTe3O9 decomposes at 560°C but all the other compounds decompose at 460°C in Ar-8%H2.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004705620488
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