Effect of Nanotegnogenic High-Alumina Raw Materials on the Physical and Mechanical Parameters and Phase Composition of Acid-Resistant Materials

• Published in: Refractories and industrial ceramics 2021-11, Vol.62 (4), p.475-482
• Main Authors: Abdrakhimova, E. S., Abdrakhimov, V. Z.
• Format: Article
• Language: English
• Subjects: Acid resistance; Aluminum oxide; Ceramic materials; Ceramics; Chamotte; Characterization and Evaluation of Materials; Chemistry and Materials Science; Clay; Clay minerals; Composites; Corundum; Glass; Infrared analysis; Kaolin; Materials Science; Mechanical properties; Mullite; Natural Materials; Parameters; Phase composition; Physical properties; Raw materials; Reagents; Sintering; Surface energy; X ray analysis
• ISSN: 1083-4877; 1573-9139
• DOI: 10.1007/s11148-021-00628-y

The use of nanotechnogenic high-alumina (Al 2 O 3 > 70%) raw materials in petrochemical production, such as the waste catalyst IM-2201 in the production of acid-resistant materials based on unbeneficiated kaolin clay, enables to obtain products with high physical, mechanical, and chemical parameters in a firing temperature range of 1250°C-1300 °C. Nanotechnogenic raw materials contribute to an increase in surface energy, which is the source of the sintering process. In compositions based on unbeneficiated kaolin clay and chamotte, mullite is mainly formed, which mainly imparts the operational properties of ceramic products. An x-ray analysis revealed that the introduction of nanotechnogenic high-alumina raw materials into the ceramic masses contributes to the formation of corundum. Infrared spectroscopic analysis confirmed the data of x-ray studies. Corundum is characterized by the high chemical resistance to acidic and alkaline reagents and provides high physical and mechanical properties in acid-resistant materials.