Preparation and characterization of cordierite glass–ceramics for bonding solar thermal transmission pipelines

Abstract

TiO2 was employed to develop cordierite glass–ceramics for thermal transmission pipeline binders by a melt‐quenching method. The effects of TiO2 on the phase composition, microstructure, and physical properties of glass–ceramics were studied. In addition, the thermal shock resistance of the glass–ceramics based binder was investigated. The results showed the formation of α cordierite could be increased by adding 1.0 wt% TiO2, thereby improving bending strength and decreasing the coefficient of thermal expansion. However, a 3‐5 wt% TiO2 additive resulted in massive generation of µ cordierite, which exhibited a negative effect on the above performances. After crystallization at 1000°C for 2 h, sample B1 (1 wt% TiO2 additional) displayed the best overall properties. It was demonstrated that cordierite glass–ceramics were satisfactory materials as heat transmission pipeline binders when the C2 binder (40 wt% frit, 60 wt% as‐prepared sample B1) was applied, which had a good thermal shock resistance.

Influence of the Nano- and Submicron Structure of Magnesium–Aluminosilicate Glasses on the Crack Resistance of High-Strength Glass-Ceramics

“…An important stage in the development of glass-crystalline materials of the MAS system is the design of their fine-crystalline structure with the content of crystalline phases: -cordierite, mullite, spinel, clinoenstatite, forsterite, which will determine their high electrical insulation characteristics and high mechanical strength [6]. Especially valuable in establishing the mechanism of glass crystallization is the determination of the effect of various nucleating agents on crystallization processes, microstructure and properties of glass-ceramics.…”