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|Perm National Research Polytechnic University, Russia|
|ScientificTracks Abstracts: Mod Chem appl|
|Porous glasses with closed cell structure and densities lower than 250–300 kg m–3 are rather attractive as functional heat-insulating materials. It was found the possibility of obtaining low-density cellular silicate materials by the hydrate mechanism due to the stronger gas evolution in the course of the redox reaction between water vapor and carbon. The research results were obtained by synchronous thermogravimetric and MS analysis, SEM, X-ray phase analysis. It was found that raising the number of Na+ ions in the raw silicate formulation leads to an increase in the amount of bound water removed at thermal plasticity temperatures of sodium-calcium glasses (973–1073 K). The redox reactions between steam and carbon in synthesis of a cellular silicate material favor an increase in the gas evolution and a decrease in the density of the material obtained. Synthesis of glass from hydrated polysilicates in the intergrain space of dispersed glass can be used to obtain foamed-glass materials and secondary use of a low-grade sodium-calcium glass. The presented method of obtaining cellular material can use any glass wastes as a raw without extra cooking and to obtain the material similar to the commercial foamed glass of blocked and granulated types. The use of non-powder preforms enables applying efficient technological methods in production and obtaining products with new properties such as large-size items, colored ones or those acceptable for facing and also lightweight construction mixes. The applications of obtained materials are presented and discussed.|
Aleksandr Ketov completed PhD and is a Professor in Inorganic Materials research and Chemical Engineering. With over 25 years of professional experience in material research and inorganic chemistry, he is a Candidate of Science degree (corresponding to PhD) from the Institute of Technology (St-Peterburg) and has obtained the full Doctor and Professor Positions from the Perm State Technical University. He has more than 30 patents of Russia and more than hundred other written works.
Email: [email protected]
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