Crystn. behavior of glasses in the K2O-TiO2-P2O5 (KTP) has been studied by DTA, XRD, EM and SHG techniques to isolate compn. ranges where bulk pptn. of ferroelec. phase KTiOPO4 occurs. It was found that bulk crystn. of KTiOPO4 at temps. slightly exceeding Tg is initiated by addn. of SiO2. Controlled heat treatment leads to formation of optically non-linear KTiOPO4 nano-particles in KTP glasses (like amorphous nanostructuring in KNS glasses) in initial stages of phase sepn. and produces nanoscaled modulation of polarisability and SHG effect. The results are compared to the xK2O xNb2O5(1-2x)SiO2 (KNS) systems.
Nano-phased crystallisation of ferroelectrics from glasses in the K2O-TiO2-P2O5 and K2O-Nb2O5-SiO2 systems / Sigaev, V. N.; Pernice, Pasquale; Aronne, Antonio; Champagnon, B.; Gregora, I.; Stefanovich, S. Y. U.; Usmanova, L.; Fanelli, Esther; Pokorny, J.. - In: INTEGRATED FERROELECTRICS. - ISSN 1058-4587. - STAMPA. - 61:(2004), pp. 249-253.
Nano-phased crystallisation of ferroelectrics from glasses in the K2O-TiO2-P2O5 and K2O-Nb2O5-SiO2 systems.
PERNICE, PASQUALE;ARONNE, ANTONIO;FANELLI, Esther;
2004
Abstract
Crystn. behavior of glasses in the K2O-TiO2-P2O5 (KTP) has been studied by DTA, XRD, EM and SHG techniques to isolate compn. ranges where bulk pptn. of ferroelec. phase KTiOPO4 occurs. It was found that bulk crystn. of KTiOPO4 at temps. slightly exceeding Tg is initiated by addn. of SiO2. Controlled heat treatment leads to formation of optically non-linear KTiOPO4 nano-particles in KTP glasses (like amorphous nanostructuring in KNS glasses) in initial stages of phase sepn. and produces nanoscaled modulation of polarisability and SHG effect. The results are compared to the xK2O xNb2O5(1-2x)SiO2 (KNS) systems.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
