MIAO Songlan, MA Guanghua, LI Qingtao, QIU Bo
(Jingdezhen Ceramic Institute, 333001)
Abstract: This paper aims at the recycle of the slag polished from building ceramics to prepare lightweight ceramic material whichhas low bulk density, good heat preservation and insulation, and is noise proof, alkali and acid -resistant, freezing resistant,simple processing and harmless to human body. Attachclay of high plasticity and flux materials were added to the slag batch to solve its low plasticity and high firing temperature.By means of plastic and pressing moulding, the batch can be fired below 1200C for about 2 hours. By optimizing process system and modifying firing system, the lightweight ceramic material wasdeveloped with closed pores and no permeation. The main parameters are: bulk density 0. 46 ~0.75g/cm3 ; compression strength 9.8~13.1 MPa; bend strength 5.7~7.1 MPa; acid-resistance 98.5~99.3%; alike-resistance 98.1~98.7%; coefficient ofthermal conductivity 0.121W/m . K; noise insulation factor 26~32dB; thermo-stability 3 times no cracking in the water of 350~20℃; freezing resistance 20 times cycle -15~15℃. This lightweight ceramic material has a wide field of application.
Key words: lightweight ceramic material, polished slag , the closed pores