Research in the Field of Preparing Molded and Unmolded Refractories Based on High-Alumina HCBS. Part 13. Effect of Firing Temperature on Phase Composition, Structure, and Some Properties of Materials Based on Composite Composition HCBS (Bauxite, Electrocorundum, Quartz Glass)1

• Published in: Refractories and industrial ceramics 2018-03, Vol.58 (6), p.652-659
• Main Authors: Pivinskii, Yu. E., Perepelitsyn, V. A., Dyakin, P. V., Kolobov, A. Yu, Prokhorenkov, D. S.
• Format: Article
• Language: English
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Glass; Materials Science; Natural Materials
• ISSN: 1083-4877; 1573-9139
• DOI: 10.1007/s11148-018-0163-y

The effect of firing temperature in the range 800 – 1640°C on the change in phase composition, structure, and some properties of specimen materials prepared on the basis of composite composition HCBS is studied. Four temperature ranges are stablished by a dilatometric method with a nonisothermal heating rate of 300°C/h corresponding to normal thermal expansion (up to 800°C), sintering accompanied by shrinkage (800 – 1150°C), mullitization accompanied by growth (1150 – 1400°), and sintering of mullitized material (1400 – 1500°C). A set of methods is used (XPA, dilatometric analysis, optical, and electron microscopy) to specify the phase composition and material structure in the firing temperature ranges noted. After firing at 1400 – 1640°C the material contains 38 – 42% mullite, 50 – 55% corundum, and balance glass phase and titanium compounds.