Sintering in a microwave field is a promising ecological technology for producing nanostructured ceramic composites from natural raw materials

Abstract

The article provides literature data on sintering inorganic substances in an electromagnetic field, shows the prospects for research in this direction. The results of sintering samples from masses based on natural compositions: marl, low-melting loam and diatomite with carbonate additives in a microwave oven are considered. The possibility of sintering in a microwave field of natural raw materials, which is traditional for the production of many fired ceramic products, has been established. The phase compositions of the fired materials have been determined. The composition of sintered compositions, consisting of nanoscale phases, has been established. The effect on the sintering process of the composition of the raw material composition from the carbonate component, diatomite and the addition of NaCl salt is shown. Samples from a mass based on marl, with the addition of diatomite and NaCl salt show high quality and increased strength of the samples, the presence of a large percentage of the amorphous phase in the fired sample, and a uniform microstructure of the material. Specimens from masses based on clay with the addition of chalk and NaCl salt after firing in the microwave field showed a significant increase in strength.