Preparation of high strength foam glass–ceramics from waste cathode ray tube

Abstract The high strength porous foam glass can be widely used as heat insulation, sound absorption, shock wave absorbing constructional materials. The new high strength foam glass–ceramics from waste cathode ray tube were prepared by sintering method, and used SiC as foam agent. In this study, the samples were characterized by differential thermal analysis (DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and mechanical property. The effect of micro-crystals reinforcement on the bending and compressive strength was investigated by the strength tests. The crystallization behavior of the samples was determined by the applying of XRD and SEM. The experimental results showed that the amazingly high mechanical strength values of 5.61–23.73 MPa can be obtained by changing the dosage of SiC and using the sintering temperature around 840–850 °C, leading to the precipitation of Pb, Pb 3 O 4 , and Al 6 Si 2 O 13 .Good correlations between mechanical strength, precipitation of micro-crystals and SiC dosage were observed.