Some phenomena occurring in basalt glass fibres at high temperatures

Abstract

It is well known that at high temperatures basalt glass wool looses its elasticity; crystalline phases appear and the fibres eventually disintegrate. Experiments reported here show that one of the factors responsible for this processes is oxidation of Fe²⁺ to Fe³⁺. Other possible physicochemical processes, which can effect the behaviour of basalt glass fibres at high temperatures were also analysed.