High infrared radiance glass-ceramics obtained from fly ash and titanium slag

A new glass–ceramic was synthesized by crystal growth from a homogenous glass obtained by melting a mixture of fly ash collected from a power plant in Hebei province of China, titanium slag collected from a titanium factory in Sichuan province of China, and MgCO₃ as an additive. According to the measurement results of differential thermal analysis, a thermal treatment of nucleating at 850 °C for 2 h and crystallizing at 985 °C for 1.5 h was used to obtain the crystallized glass. X-ray diffraction and scanning electron microscopy measurements showed that the main crystalline phase of this material was iron-ion substituted cordierite, (Mg,Fe)₂Al₄Si₅O₁₈, which is homogeneously dispersed within the parent glass matrix. The infrared radiance and thermal expansion coefficient of this material have been examined, and the results demonstrate that this glass–ceramic material has potential for application in a wide range of infrared heating and drying materials.