Sulfur speciation and network structural changes in silicate-phosphate glasses

被引：5

作者：

Sulowska, Justyna ^{[1
]}

Jelen, Piotr ^{[1
]}

Olejniczak, Zbigniew ^{[2
]}

Szumera, Magdalena ^{[1
]}

机构：

[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al A Mickiewicza 30, PL-30059 Krakow, Poland

[2] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2021年 / 557卷

关键词：

Silicate-phosphate glasses; Sulfur speciation; Glass structure; SEM EDS; Raman spectroscopy; MAS NMR;

D O I：

10.1016/j.jnoncrysol.2021.120645

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Sulfur speciation and the network structure of glasses from the SiO2-P2O5-K2O-MgO-SO3 system were studied by Raman and MAS NMR techniques. Glasses were synthesized by melting powders containing reducing agents. Bulk composition and homogeneity of the glasses were confirmed by X-Ray Fluorescence Spectroscopy and Scanning Electron Microscopy, combined with analysis of microregions via Energy Dispersive X-Ray Spectroscopy. Raman spectra demonstrate that S-bearing glasses can contain more reduced forms of sulfur than SO42-, such as S2O42- , S2O32-, S2O52-, and polysulfides Sx(2-), depending on the reducing conditions. The P-31 and Si-29 MAS NMR spectra did not reveal peaks corresponding to P-S and Si-S linkages and indicate slight polymerization of the silico-oxygen and phospho-oxygen subnetworks.

引用

页数：9

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