Comparison the effect of temperature and amount of SiC on properties and microstructure of foam glass from waste soda-lime glass and cathode ray tube display panel

In this paper، the effect of temperature and amount of foming agent (silicon carbide) on properties and microstructure of foam glass from waste cathode ray tube display panel and waste soda-lime glass are investigated. To this end، each of the glasses powder prepared in less than 63 µm and then different amounts of silicon carbide (2، 4، 6 and 8 wt%) was added to them. The powders were compacted under uniaxial press and then sintered at vrious temperatures (750-1050°C) with the same sintering program. Physical and mechanical properties of samples such as density، porosity and bending strength were measured. Also microstructural studies of samples were examined by Scanning Electron Microscopy. The results showed that SiC as a foaming agent can control the pore size and creates microstructure with a narrow distribution of pores.. The sample with 4% SiC was changed into foam at 850˚C، had the most amount porosity (90%) and bending strength (0. 57 MPa) but the size of pores was large and pore distribution was heterogeneous. In the case of cathode ray tube display panel and 6 wt% SiC that was sintered at 950°C for the same time، the highest prosity was about 55% and bending strength was 12 MPa that had relatively uniform microstructure. These properties have been improved in comparison with those of commercial samples.