Applied Mechanics and Materials Vol. 777

Abstract: In this paper, the fancy red brown glaze with suitable red spots was prepared. Effects of Fe₂O₃ contents on the glaze were studied. Glaze surface quality was investigated. X-ray diffraction (XRD) were analyzed the phase. The results showed that with the increase of Fe₂O₃ contents, the obtained sample changed from black as the base color with little red spots, to the red brown as the base color with uniform red spots, and then to the red brown as the base color with crowded red spots. It indicated that the suitable Fe₂O₃ content is important for good glaze surface quality with red spots. When Fe₂O₃ content is 10%, the iron-red fancy glaze with low expansion coefficient could be well matched with the body. It is due to the presence of petalite phase, corderite phase and a - Fe₂O₃ crystals.

Abstract: In this paper, the low thermal expansion iron-red glaze was prepared. Effects of Si/Al molar ratio on the glaze were studied. The phase and thermal expansion coefficient were characterized by XRD and thermal expansion coefficient analysis. The results showed that with the increase of Si/Al molar ratio, the obtained sample changed from small red spots or suitable spots, to connected red spots, and then to little red spots. When Si/Al molar ratio of the sample changes from 8.0 to 9.0, the thermal expansion coefficient of the sample was slightly lower than that of porcelain body and the difference between them remained between 1.08~ 1.12×10^-6K^-1 and 1.16×10^-6K^-1, which indicated that the iron-red glaze could be well matched with the low-expansion porcelain body.

Abstract: The influence of a nanostructured modifier of silicate composition on the phase formation in the system of cellular composites of autoclaved hardening is studied. It is established that the reaction-active component NM favors the displacement of C-S-H phase formation to the low-basic field. In the process, an optimal ratio of low-and highly basic calcium hydro-silicates is formed that favors the improvement of strength characteristics of autoclaved gas concrete with the use of the nanostructured modifier and its operating life in the process of exploitation.