Title

Study on the Decomposition of the Crystalline Phase Na2O · 8TeO2

Abstract

The new crystalline phase was found in the Na2O·TeO2 system, Na2O·8TeO2, (NT8) was heated at different temperatures for different time and the crystalline phase in the different samples were analyzed. The mechanism of the decomposition for the Na2O·8TeO2 was explored and discussed in detail. Results show that the NT8 is stable below 330°C and will decompose into two crystalline phase: Na2O·4TeO2 and TeO2. There are two thermal effects found during the decomposition of NT8: one is the endothermal and the other exothermal, indicating that one amorphous phase formed during the decomposition of NT8. It is believed that the decomposition of NT8 happened according the following two steps: first the NT8 is transformed into an amorphous phase and then the amorphous phase is transformed into NT4 and TeO2.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Amorphous; Decomposition; NT8; Sodium compounds; Tellurium compounds; Thermal effects

International Standard Serial Number (ISSN)

1002-185X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

Chinese

Language 2

English

Rights

© 2007 Rare Metals Materials and Engineering Press, All rights reserved.

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