Journal of Inorganic Materials

• Research Paper • Previous Articles     Next Articles

New Crystalline Phase (Na2O-8TeO2) Formed During Heat-Treatmentof Na2O-TeO2 System

ZHU Dong-Mei1; ZHOU Wan-Cheng1; Ray C.S.2; Day D.E2   

  1. 1. State Key Laboratory of Solidification Processing; Northwestern Polytechnical University; Xi an; 710072; China; 2. Ceramic Engineering Department and Graduate Center for Materials Research; University of Missouri-Rolla, Rolla MO65401 USA
  • Received:2001-05-07 Revised:2001-07-17 Published:2002-05-20 Online:2002-05-20

Abstract: A new crystalline phase with the composition of Na2O· 8TeO2(NT8) was found in the Na2O-TeO2 system and the formation and decomposition of this new crystalline phase was explored. The NT8 crystalline phase is stable at 330℃ or below, and decomposes to Na2O·4TeO2 and TeO2 at temperatures higher than 330-340℃. A modification to the phase diagram of the Na2O-TeO2 system was proposed according to this research.

Key words: sodium tellurite, phase diagram, new crystalline phase

CLC Number: