Инд. авторы:	Kuryaeva R.G., Surkov N.V.
Заглавие:	Effect of the replacement of aluminum by magnesium on the compressibility and degree of polymerization of silicate glasses
Библ. ссылка:	Kuryaeva R.G., Surkov N.V. Effect of the replacement of aluminum by magnesium on the compressibility and degree of polymerization of silicate glasses // Journal of Materials Science. - 2013. - Vol.48. - Iss. 12. - P.4416-4426. - ISSN 0022-2461. - EISSN 1573-4803.
Внешние системы:	DOI: 10.1007/s10853-013-7260-6; SCOPUS: 2-s2.0-84877804116; WoS: 000316911300026;
Реферат:	eng: The refractive index of Na2MgSi4O10 and Na2Al2Si4O12 glasses in the pressure range to 6.0 GPa was measured using a polarization-interference microscope and apparatus with diamond anvils. The changes in relative density, which characterize the compressibility of glasses, were calculated in the studied range of pressures from the measured refractive indices within the framework of the theory of photoelasticity. For the studied glasses, the degree of depolimerization was found to be NBO/T = 0.28 and 0.25 for Na 2MgSi4O10 and Na2Al 2Si4O12 glasses, respectively. It is shown that the replacement of aluminum by magnesium in silicate glasses does not lead to a considerable decrease in compressibility, which suggests the predominant role of magnesium ions as network formers. A minor increase in compressibility when passing from Na2MgSi4O10 to Na 2Al2Si4O12 glass conforms with the corresponding decrease in the degree of depolymerization. © 2013 Springer Science+Business Media New York.
Ключевые слова:	Sodium; Silicon; Silicates; Refractive index; Microscopes; Metal ions; Magnesium; Compressibility; Glass; Silicate glass; Relative density; Pressure ranges; Magnesium ions; Glasses In; Diamond anvil; Degree of polymerization; Degree of depolymerization; Aluminum;
Издано:	2013
Физ. характеристика:	с.4416-4426