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New transparent crystallized glasses with optical nonlinear LiBGeO4 crystals

Takahashi, Y and Benino, Y and Fujiwara, T and Varma, KBR and Komatsu, T (2002) New transparent crystallized glasses with optical nonlinear LiBGeO4 crystals. In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi / Journal of the Ceramic Society of Japan, 110 (1). pp. 22-26.

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Official URL: http://sciencelinks.jp/j-east/article/200208/00002...


Crystallization behaviors of the glass with a composition of 25Li(2)O.25B(2)O(3).50GeO(2) corresponding to lithium borogermanate LiBGeO4 have been examined. It has been confirmed that the LiBGeO4 crystalline phase is formed at the surface of heat-treated glasses. The second harmonic (SH) generation is found from transparent surface crystallized glasses, demonstrating for the first time that the LiBGeO4 phase shows optical nonlinearity. The SH intensity of LiBGeO4 crystallites (powdered state) prepared through crystallization is about ten times as large as that of pulverized alpha-quartz. The SH intensity of transparent crystallized glasses (bulk state) with crystalline layers of 3-4.5 mum thickness increases with increasing heat treatment temperature (540-560degreesC) and time (1-6 h), and the maximum SH intensity among the samples studied is in the order of 1/10 in comparison with that of alpha-quartz single crystal. The transparent crystallized glass obtained by heat treatment at 550alphaC for 3 h exhibits a clear and fine Maker fringe pattern, indicating a highly orientation of LiBGeO4 crystals at the surface.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Japan Science and Technology Information Aggregator, Electronic.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Ms V Mangala
Date Deposited: 21 Jul 2011 06:51
Last Modified: 21 Jul 2011 06:51
URI: http://eprints.iisc.ac.in/id/eprint/39297

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