Use Of Microwave Radiation For The Processing Of Glass

Feasibility experiments have been carried out to investigate possible applications for microwave radiation in the processing of silicate glasses. Strong absorption of the radiation was achieved by preheating the glasses, or by the application of microwave absorbing coatings, or by hydration. Experiments in melting, refining, reheating for forming, thermal toughening and surface ion exchange showed that the principal advantages of microwave radiation are rapidity of heating and a capability to heat hot areas of the glass selectively while leaving the cooler areas unaffected. Control of the uniformity and rate of heating were the principal difficulties.