Submicron SiO₂ Powder: Characterization and Effects on Properties of Cement-Free Iron Ditch Castables

Figure 4

Mechanical properties of specimens treated at different temperatures: (a) compressive and flexural strength of samples dried at 110°C for 24 h; (b) compressive and flexural strength of samples sintered at 1000°C for 3 h; (c) compressive and flexural strength of samples sintered at 1450°C for 3 h; (d) high-temperature flexural strength of samples sintered at 1400°C for 1 h.

(a)

(b)

(c)

(d)