DONG Lina, HU Keyan, GU Xingyong, LUO Ting

(Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)

Abstract: Fly ash is one of the largest industrial waste sources in china. An important technologic and economic policy is to recycle and utilize fly ash comprehensively. In this experiment, fly ash was used as raw material to make infrared radiation sanitary ceramics, and the influence of the fly ash content on the molding and performance of the samples was investigated. The sintered samples were detected by SEM, infrared emissivity measuring instrument (IR) and INSTRON-1195 universal measuring instrument. Results show that with the increasing content of fly ash the plasticity index of raw slurry decreased, while the bending strength of the sintered ceramics increased, and the infrared emissivity declined. When the fly ash content reached 36%, the sintered ceramics had the optimal performance with the porosity of 3.96% and the infrared emissivity of 0.877 and the bending strength of 90.72 MPa.

Key words: fly ash; infrared radiation sanitary ceramics; plasticity; bending strength; infrared emissivity