...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Structural study of PbO-MoO_3-P_2O_5 glasses by Raman and NMR spectroscopy
【24h】

Structural study of PbO-MoO_3-P_2O_5 glasses by Raman and NMR spectroscopy

机译：PbO-MoO_3-P_2O_5玻璃的拉曼光谱和NMR光谱分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Glasses in the ternary system PbO-MoO_3-P_2O _5 were prepared in three compositional series (100 - x)[0.5PbO-0.5P_2O_5]-xMoO_3 (A), 50PbO-yMoO 3-(50 - y)P_2O_5 (B) and (50 - z)PbO-xMoO 3-50P_2O_5 (C) and their structure was studied by Raman and 31P NMR spectroscopies. In the compositional series (100 - x)[0.5PbO-0.5P_2O_5]-xMoO3 homogeneous glasses were prepared in the concentration region of 0-70 mol% MoO_3. Their glass transition temperature increases with increasing MoO_3 content having a maximum at x = 50 mol% MoO3. 31P MAS NMR spectra reveal that in the glass series (A) the incorporation of MoO_3 results in the shortening of phosphate chains and gradual transformation Q_2 units into Q2 and Q0 units, prevailing in glasses with a high MoO3 content. Octahedral structural units MoO_6 dominate in most glass compositions and they are present also in the structure of Pb(MoO_2)_2(PO_4)_2 compound corresponding to the glass composition 50Pb(PO_3)2- 50MoO_3. The analysis of Raman spectra of glasses of the (B) series with a high MoO_3 content showed the transformation of octahedral MoO6 units into tetrahedral MoO4 units.
机译：三元体系PbO-MoO_3-P_2O _5的玻璃以三个成分系列（100-x）[0.5PbO-0.5P_2O_5] -xMoO_3（A），50PbO-yMoO 3-（50-y）P_2O_5（B）和（50-z）PbO-xMoO 3-50P_2O_5（C）及其结构通过拉曼和31P NMR光谱学研究。在组成系列（100-x）[0.5PbO-0.5P_2O_5] -xMoO3中，制备了浓度范围为0-70 mol％MoO_3的均匀玻璃。它们的玻璃化转变温度随着MoO_3含量的增加而增加，在x = 50 mol％MoO3处具有最大值。 31P MAS NMR光谱表明，在玻璃系列（A）中，MoO_3的掺入导致磷酸盐链的缩短和Q_2单元逐渐转变为Q2和Q0单元，在MoO3含量高的玻璃中普遍存在。八面体结构单元MoO_6在大多数玻璃组合物中占主导地位，它们也存在于对应于玻璃组合物50Pb（PO_3）2- 50MoO_3的Pb（MoO_2）_2（PO_4）_2化合物的结构中。对具有高MoO_3含量的（B）系列玻璃的拉曼光谱分析表明，八面体MoO6单元转变为四面体MoO4单元。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号