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无机材料学报

无机材料学报

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Na2O-TeO2系统中的一个新晶相

朱冬梅1; 周万城1; Ray C. S.2, Day D. E.2   

  1. 1. 西北工业大学凝固技术国家重点实验室, 西安 710072; 2. Ceramic Engineering Department and Graduate Center for Materials Research; University of Missouri-Rolla; Rolla MO65401 USA
  • 收稿日期:2001-05-07 修回日期:2001-07-17 出版日期:2002-05-20 网络出版日期:2002-05-20

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

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摘要： 在Na２O－ReO2系统中发现了一个未知的新晶相,探索了该晶相的确切成分和形成条件,并根据实验结果,对现有的相图作了相应的修改．该晶相的具体成分为Na２O·8TeO2．此晶相在330℃下能稳定存在,当温度达到或高于340℃时则分解成Na3O·4TeO2和TeO2两个晶相．

关键词: 亚碲酸钠, 相图, 新晶相

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

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