ZHANG Boye 1, HUANG Jianfeng 1, TAO Xiaowen 2, LI Zhuan 2, WANG Qinggang 1, FEI Jie 1, YAN Kaifang 2, LIU Chun 2
(1. School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi’an 710021, Shaanxi, China; 2. Xianyang Research & Design Institute of Ceramic, Xianyang 712000, Shaanxi, China)
Abstract: Specimens were prepared from tile polishing waste by dry granulation and pressing and then sintered at 1100-1250°C. Influence of different sintering temperatures on their foaming properties was discussed, which provides a research basis for comprehensive utilization of tile polishing waste. The results showed that linear expansion ratio and water absorption increased with sintered temperature while bending strength and bulk density decreased. The specimens linearly shrank when sintered at 1100 ℃; apparent pores appeared, and the bending strength and bulk density reached 11.3 MPa and 0.74 g/cm3 respectively when sintered at 1160 ℃; foaming properties changed significantly when sintered at 1200°C and glassy gloss occurred; the specimens expanded continually with the average pore size and bulk density up to 0.48 g/cm3 and 1.53 respectively when the sintering temperature increased to 1250 ℃.
Key words: tile polishing waste; sintering temperature; dry granulation process