The surface and bulk crystallisation of lead tetragermanate glass has been studied by differential thermal analysis. The influence of the specific surface area of the sample and the nucleation heat-treatment on the crystallisation is pointed out. Infrared spectroscopy measurements suggest that the addition of PbO to germanium oxide leads to a change in the coordination number of germanium atoms from 4 to 6. The phases which crystallise during the DTA runs were identified by X-ray diffraction as hexagonal and monoclinic PbGeO4O9. The activation energy of crystal growth was also evaluated from DTA curves. A value of about 300 kJ mol(-1) was calculated from surface and bulk crystallisation.

Bulk and Surface Crystallization of Lead Tetragermanate Glass - A DTA Study / Aronne, Antonio; M., Catauro; Pernice, Pasquale. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - STAMPA. - 259:(1995), pp. 269-275. [10.1016/0040-6031(94)02215-A]

Bulk and Surface Crystallization of Lead Tetragermanate Glass - A DTA Study

ARONNE, ANTONIO;PERNICE, PASQUALE
1995

Abstract

The surface and bulk crystallisation of lead tetragermanate glass has been studied by differential thermal analysis. The influence of the specific surface area of the sample and the nucleation heat-treatment on the crystallisation is pointed out. Infrared spectroscopy measurements suggest that the addition of PbO to germanium oxide leads to a change in the coordination number of germanium atoms from 4 to 6. The phases which crystallise during the DTA runs were identified by X-ray diffraction as hexagonal and monoclinic PbGeO4O9. The activation energy of crystal growth was also evaluated from DTA curves. A value of about 300 kJ mol(-1) was calculated from surface and bulk crystallisation.
1995
Bulk and Surface Crystallization of Lead Tetragermanate Glass - A DTA Study / Aronne, Antonio; M., Catauro; Pernice, Pasquale. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - STAMPA. - 259:(1995), pp. 269-275. [10.1016/0040-6031(94)02215-A]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/465709
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 10
social impact