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Preparation and properties of mixed La–Pr silicate oxynitride glasses
King Fahd University of Petroleum & Minerals (KFUPM).
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för bygg- och energiteknik (BE).
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för bygg- och energiteknik (BE).
2013 (engelsk)Inngår i: Journal of Non-Crystalline Solids, ISSN 0022-3093, E-ISSN 1873-4812, Vol. 368, s. 93-97Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The preparation and properties of mixed lanthanide (La, Pr) silicate oxynitride glasses are reported. These oxynitride glasses were prepared by melting mixtures of La, Pr, SiO2 and Si3N4 powders in a nitrogen atmosphere at 1750 °C. The glasses were characterized by X-ray powder diffraction, differential thermal analysis, scanning and transmission electron microscopy. Glass compositions were calculated from the analyses obtained by energy dispersive X-ray (EDX) spectroscopy and combustion analysis, for cation and anion compositions, respectively. The glasses were found to be homogenous, optically opaque black, and to contain contents up to 66 e/o of N and up to 48 e/o of La–Pr. The physical properties were found to vary linearly with the degree of substitution of La by the Pr. Determined glass density increases substantially upon the substitution of La by Pr, up to 5.49 g/cm3. The calculated molar volumes and compactness values decrease and increase respectively by the substitution of Pr for La. Glass transition temperatures and microhardness increase upon the substitution by Pr, up to 1086 °C and 10.98 GPa, respectively. The refractive index increases upon the substitution by Pr up to 2.00.

sted, utgiver, år, opplag, sider
Elsevier, 2013. Vol. 368, s. 93-97
Emneord [en]
Oxynitride glass, Mixed modifier, High rare earth content, Microhardness, Refractive index
HSV kategori
Forskningsprogram
Teknik, Glasteknologi
Identifikatorer
URN: urn:nbn:se:lnu:diva-25944DOI: 10.1016/j.jnoncrysol.2013.03.013ISI: 000319103700014Scopus ID: 2-s2.0-84876108967OAI: oai:DiVA.org:lnu-25944DiVA, id: diva2:624037
Tilgjengelig fra: 2013-05-29 Laget: 2013-05-29 Sist oppdatert: 2017-12-06bibliografisk kontrollert

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