SI-29 MAS NMR INVESTIGATIONS OF NA2O.SIO2 GLASSES - REFINEMENT OF THE BINARY DISTRIBUTION MODEL

被引：7
|
作者：
GRIMMER, AR
THOMAS, B
SEIFERT, G
SARV, P
机构：
[1] BERGAKAD FREIBERG,SEKT CHEM,O-9200 FREIBERG,GERMANY
[2] TALLINN CHEM PHYS & BIOPHYS INST,TALLINN 200001,ESTONIA,USSR
来源：
MAGNETIC RESONANCE IN CHEMISTRY | 1990年 / 28卷
关键词：
!sup]29[!/sup]Si MAS NMR structure models; Binary sodium silicate glasses; Fictitious temperature concept;
D O I：
10.1002/mrc.1260281316
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Silicon‐29 MAS (9 kHz) NMR spectra at 11.7 T, combined with an improved deconvolution procedure, are used to refine the Qn/Qn‐1 distribution model for binary glasses x Na2O · SiO2 (0.18 < x < 0.49). Using the fictitious temperature concept the binary distribution is shown to be the low‐temperature limiting case for the distribution of structural units Qn, Observed deviations from the strict model tending to random distribution can be explained by the model of Dorfeld. Additional structural information can be derived from 29Si chemical shift and line‐width data. Copyright © 1990 John Wiley & Sons, Ltd.
引用
收藏
页码：S97 / S103
页数：7
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