Thermal and optical properties of glass and crystalline phases formed in the binary R2O3-Al2O3 (R = La-Lu and Y) system

Vijaya Kumar, M. and Ishikawa, T. and Basavalingu, B. and Okada, J. T. and Watanabe, Y. (2013) Thermal and optical properties of glass and crystalline phases formed in the binary R2O3-Al2O3 (R = La-Lu and Y) system. Journal of Applied Physics, 113 (19). ISSN 0021-8979

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Abstract

Rare-earth aluminate (RAlO3, R = La-Lu and Y) glass and crystalline phases were prepared by containerless levitation in an aerodynamic levitation furnace. In the RAlO3 system, La, Nd and Sm aluminum perovskites solidified as glass and Eu-Lu and Y aluminum perovskites solidified as crystalline phases. The glass forming region decreased with decreasing ionic radius of the rare-earth element. Scanning electron microscopy images and x-ray diffraction results revealed the formation of a single RAlO3 phase from the undercooled melt. The glass transition temperature, Tg, and density increased and the molar volume decreased with decreasing rare-earth element ionic radius. The refractive index at 589 nm exceeds 1.85 in each composition and a transparency of approximately 72% was achieved for the LaAlO3 glass.

Item Type:	Article
Uncontrolled Keywords:	Aerodynamic levitation furnace, Aluminum, Containerless, Crystalline materials, Crystalline phasis, Glass, Glass forming region, Ionic conduction in solids, Ionic radius, Lanthanum, Perovskite, Rare earth aluminate, Refractive index, Scanning electron microscopy, Scanning electron microscopy image, Undercooled melt, X ray diffraction
Subjects:	F Earth Science > Geology
Divisions:	Department of > Earth Science
Depositing User:	Arshiya Kousar Library Assistant
Date Deposited:	12 Nov 2019 05:41
Last Modified:	12 Nov 2019 05:41
URI:	http://eprints.uni-mysore.ac.in/id/eprint/9617

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