Stress state in glass bodies degassed under heating by infrared radiation

A model is proposed to calculate stresses in a glass layer with gas impurities heated by thermal infrared radiation. Calculations were performed for a layer with a diatomic impurity of nitric oxide and a triatomic impurity of water. It is shown that for the radiation parameters and impurity concentrations considered, the presence of nitric oxide in the layer does not influence its stress state, whereas the presence of water leads to a certain increase of stress. The stress state of the layer is determined by the level of thermal stresses, and theconcentration stresses and the stresses due to the mass forces of radiation are negligible. An increase in the rate of diffusion of the diatomic impurity due to a change of the radiation spectrum is accompanied by an increase of thermal stresses.