BORON OXYFLUORIDE GLASSES IN THE B-O-F SYSTEM - NEW POLYMERIC SPAGHETTI-TYPE GLASSES

Direct reaction at T = 200 degrees C of gaseous BF3 on B2O3 in a close d silica tube leads to B-O-F glass formation in the cold part of the v essel. The vitreous material obtained from vapour phase condensation h as a weak dimensionality as indicated by the low glass transition temp erature, T-g = 60 degrees C. The relationship between the trimeric mol ecular form, B3O3F3, and the polymer glass (BOF)(n) is discussed with respect to formation conditions and glass decomposition.