Steklo i Keramika (Glass and Ceramics). Monthly scientific, technical and industrial journal

 

ISSN 0131-9582 (Online)

The wetting and spreading of 0.2 N HCl solution over the surface of lead-silicate glasses С87-2 and С78-4 before and after their thermohydrogen reduction was investigated. It is shown that thermohydrogen reduction improves the interaction of acidic solutions with glasses. The results obtained are explained by the appearance of lead on the surface of the studied glasses and their dehydration, which occurs in the process of thermohydrogen reduction of lead silicate glasses.
According to the results of statistical analysis of data on the preparation of slip from quartz glass and data on the scrap of ceramic products, the effect of pH and the duration of rotary mixing of the slip on the probability of occurrence of scrap along cracks was found. The use of data on the zeta potential of slip particles and consideration of the scheme of physicochemical transformations of submicroparticles of quartz glass and silica ash in the slip made it possible to identify the intervals of optimal pH values ??and the duration of rotational stirring of the slip
Elemental chemical composition showed an increased mass content of calcium (Ca = 5.9 & # 37;) in the samples, which contributes to the formation of anorthite, which increases the strength of products, and an increased mass content of carbon (C = 14.79 & # 37;) indicates the introduction of fuel into the raw. The increased mass content of fuel in the raw material promotes uniform sintering inside the ceramic sample. Increased mass content in the sample of iron (Fe = 2.98 & # 37;) and alkali (R 2 O = Na 2 O + K 2 O = 2.57 & # 37;) will promote the formation of a liquid phase at 950 & # 176; C. X-ray phase analysis is confirmed by element-by-element analysis that increased calcium content contributes to the formation of anorthite