VAPOR-PHASE DEPOSITION OF FOAMING BORON OXYFLUORIDE VITREOUS MATERIALS

Authors
BOUSSARDPLEDEL C LEFLOCH M FONTENEAU G LUCAS J
Citation
C. Boussardpledel et al., VAPOR-PHASE DEPOSITION OF FOAMING BORON OXYFLUORIDE VITREOUS MATERIALS, Materials research bulletin, 32(7), 1997, pp. 805-811
Citations number
4
Categorie Soggetti
Material Science
Journal title
Materials research bulletin → ACNP
ISSN journal
00255408
Volume
32
Issue
7
Year of publication
1997
Pages
805 - 811
Database
ISI
SICI code
0025-5408(1997)32:7<805:VDOFBO>2.0.ZU;2-6
Abstract
A new class of polymeric glasses belonging to the B-O-F system has bee n synthesized by reaction between B2O3 and BF3 gas in a sealed silica tube being in a temperature gradient condition. The glass formation me chanism which involves a vapor phase transport indicates that the F co ncentration in the glass varies with the deposit temperature. The glas s transition temperatures Tg are in the range -15 to 120 degrees C and depend on the F/B ratio. A foaming phenomenon, due to BF3 bubbles nuc leation, is observed when the ''BOF'' glasses are maintained above Tg. (C) 1997 Elsevier Science Ltd.