Crystallization and second harmonic generation of lithium niobium silicate glass ceramics

Hélène Vigouroux (1) , Evelyne Fargin (1) , Alexandre Fargues (1) , Bruno Le Garrec (2) , Marc Dussauze (3) , Vincent Rodriguez (3) , Frédéric Adamietz (3) , Grigoris Mountrichas (4) , Efstratios I. Kamitsos (4) , Sergei Lotarev (5) , Vladimir Sigaev (5)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 CESTA - Centre d'études scientifiques et techniques d'Aquitaine
3 ISM - Institut des Sciences Moléculaires
4 Theoretical and Physical Chemistry Institute
5 Mendeleev University of Chemical Technology of Russia

An extended study of lithium niobium silicate glass crystallization with the molar composition 35Li2O-25Nb2O5-40SiO2 is presented. Depending on the heat treatments, both surface and/or bulk crystallizations of the LiNbO3 crystalline phase were observed. X-ray diffraction together with second harmonic generation (SHG) measurements have revealed a net preferred orientation of the ferroelectric crystallites at the surface which is quite different in the bulk. A striking and promising SHG response estimated to be five times larger than α-quartz has been observed in the bulk.

Mots clés: Glasses; Cermics; Second Harmonic Generation

Domaines: Matériaux

Hélène Vigouroux, Evelyne Fargin, Alexandre Fargues, Bruno Le Garrec, Marc Dussauze, et al.. Crystallization and second harmonic generation of lithium niobium silicate glass ceramics. Journal of the American Ceramic Society, 2011, 94 (7), pp.2080-2086. ⟨10.1111/j.1551-2916.2011.04416.x⟩. ⟨hal-00932172⟩