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Proceedings Paper

Al2-X MeX (WO4)3 single crystal, Ме=Sc, Y, Ga and In, as a new tunable laser media
Author(s): Donka Ivanova; Velin Nikiolov; Pavel Peshev
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Paper Abstract

The crystallization conditions of Al2(WO4)3 from Li2O-WO3 solvents (molar ratio 30.0:70.0, 32.5:67.5, 35.0:65.0, 45.0:55.0 and 55.0:45.0) as well as from Na2O-WO3 solvents (molar ratio 25.0:75.0, 27.5:72.5, 30.0:70.0 and 32.5:67.5) have been investigated. The concentration and temperature regions of crystallization of Al2(WO4)3 and the density, viscosity as well as the solution losses due to evaporation have been established. On the basis of the data obtained it has been concluded that the most suitable solvent for growing Al2(WO4)3 single crystals is Na2O-WO3 with a molar ratio of 27.5:72.5. The temperature and concentration regions of crystallization of Al2-xMex(WO4)3 solid solutions obtained by replacement of Al2O3 in the Na2O-Al2O3-WO3 system by Ga2O3, In2O3, Sc2O3 or Y2O3 have been investigated. The crystallization regions and concentration boundaries of existence of the solutions are found to depend strongly on the nature of the replacing element. Solid solutions containing Sc and In crystallize from high-temperature solutions with a lower concentration as compared to that of pure Al2(WO4)3, this being accompanied by a high distribution coefficient of the substituting ion. On the contrary, Ga and Y containing solid solutions crystallize from high-temperature solutions with much higher concentrations, the distribution coefficient of the substituting ions being relatively low. The experimental obtained data are the basis for growing bulk single crystals with preset compositions from the Al2-X MeX (WO4)3, Me=Sc, Y, Ga or In, solid solutions.

Paper Details

Date Published: 15 November 2007
PDF: 8 pages
Proc. SPIE 6740, Optical Materials in Defence Systems Technology IV, 67400N (15 November 2007); doi: 10.1117/12.736831
Show Author Affiliations
Donka Ivanova, Institute of General and Inorganic Chemistry (Bulgaria)
Velin Nikiolov, Institute of General and Inorganic Chemistry (Bulgaria)
Pavel Peshev, Institute of General and Inorganic Chemistry (Bulgaria)


Published in SPIE Proceedings Vol. 6740:
Optical Materials in Defence Systems Technology IV
James G. Grote; Francois Kajzar; Mikael Lindgren, Editor(s)

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