Crystallization and second harmonic generation in thermally poled niobium borophosphate glasses

Artem Malakho (1, 2) , Marc Dussauze (1) , Evelyne Fargin (1) , Bogdan Lazoryak (3) , Vincent Rodriguez (4) , Frédéric Adamietz (4)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 Department of Material Science
3 Department of Chemistry
4 LPCM - Laboratoire de Physico-Chimie Moléculaire

Crystallization of glasses with compositions (1−x)(0.95 NaPO3+0.05 Na2B4O7)+xNb2O5, x=0.4, 0.43, 0.45, 0.48 was investigated by differential scanning calorimetry and X-ray powder diffraction. Crystallization of two phases was observed in the glasses with x=0.43–0.48. First phase is a sodium niobate with the structure of tetragonal tungsten bronze (Tc~720-760°C) and second phase is Na4Nb8P4O32 (Tc~830-850°C). The crystallization of sodium niobate is correlated with increasing of nonlinear optical efficiency reported for thermally poled glasses with x>0.4...

Mots clés: Second harmonic generation; Borophosphates; Glasses; Niobium; Crystallization; Poled

Domaines: Matériaux

Artem Malakho, Marc Dussauze, Evelyne Fargin, Bogdan Lazoryak, Vincent Rodriguez, et al.. Crystallization and second harmonic generation in thermally poled niobium borophosphate glasses. Journal of Solid State Chemistry, 2005, 178 (6), pp.1888-1897. ⟨10.1016/j.jssc.2005.03.035⟩. ⟨hal-00081857⟩