Open AccessProspects and features of microwave sintering in the technology of building ceramics
Author(s) -
И. А. Женжурист
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/890/1/012088
Subject(s) - sintering , materials science , ceramic , raw material , silicate , calcination , mineralogy , aluminium , microwave , phase (matter) , metallurgy , chemical engineering , chemistry , biochemistry , physics , organic chemistry , quantum mechanics , engineering , catalysis
The results of firing samples from natural aluminum silicates in a microwave oven are considered. The possibility of sintering aluminum silicate raw materials, traditional for the production of building ceramics, is established. The phase compositions of the calcined materials are determined. The influence on the sintering process of the mineral structure of clay raw materials, the composition of the diatomite and the addition of NaCl salt was established. Samples from the mass with the addition of NaCl show high quality and increased strength of the samples. Samples from masses based on brick clay with NaCl salt, annealed in the microwave electromagnetic field, did not show a large increase in strength. For all mass compositions with NaCl, a decrease in the energy of the endothermic process was revealed in the temperature range 400-600 °C. In all mass compositions from clays with NaCl and diatomite with salt and marl, the presence of an aluminum silicate phase with a size of less than 30 nanometers was found. Masses with such a phase structure showed increased strength of the samples.