Volatilisation Of Lead Crystal Glasses In Dry And Wet Gas Atmosphere (In Czech)

The volatilisation of two glass melts of the same type produced by different glassworks was followed by measuring of weight losses under defined conditions of high temperature evaporation. It was confirmed that the weight losses by volatilisation are increasing with temperatures in the range 1200-1400 deg C. The type of carrying gas (CO2, N2 and 02) and the water vapour content in those gases has a small influence on volatilisation only at 1400 deg C in the case of one glass melt investigated. The difference in volatilisation of the two melts can be related to a different regime of glass melting which can be considered as the reason for different physical-chemical states of both glass melts.