ДОСЛІДЖЕННЯ ВПЛИВУ НВЧ ВИПРОМІНЮВАННЯ НА ВЛАСТИВОСТІ КОМПОЗИЦІЙНИХ ТЕПЛОІЗОЛЯЦІЙНИХ МАТЕРІАЛІВ НА ОСНОВІ РІДИННОГО СКЛА

Abstract

Composite materials on the basis of liquid glass in the form of various heat-insulating products receive on the basis of
granulated products by means of their contact monolithic treatment with various binders. The binder in their manufacture is liquid glass or a mixture of it with special additives. However, such materials have low strength and water resistance. One of the ways to solve this problem is the use of new and unconventional types of energy, which include microwave radiation, which improves the performance of products by modifying the structure of the liquid glass matrix under the outflow of its irradiation with this type of energy. Applying microwave technology of swelling of liquid glass compositions which advantage is a possibility of volume heating from within material, it is possible to achieve reduction of duration of process of swelling and its carrying out at lower temperatures. Thanks to fast and intensive volume heating it is possible to apply technology of simultaneous swelling of the granulated semi-finished product and binder that allows to receive uniformly structural and volume monolithic material which represents not separately glued granules, and the monolithic block. Studies have shown the possibility of obtaining composite thermal insulation materials based on liquid glass with improved physical and mechanical characteristics due to the effect of non-thermal action of microwave radiation, which consists in the formation of microwave radiation crosslinked structure of liquid glass with less defective low molecular weight fraction. With the use of microwave radiation it is possible to obtain composite thermal insulation materials based on liquid glass with a better set of performance properties, with lower energy costs for their production than in the case of traditional convective heating.