Affiliation:
1. Dalian Polytechnic University
2. University of Science and Technology Beijing
Abstract
Sialon-based eco-materials were synthesized by using the gold mineral tailings that containing abundant Si and Al elements as the major raw material with minor additives through the carbothermal reduction nitridation route. This study realized the conversion of eco-materials from solid waste, gold mineral tailings. The effects of sintering temperature, holding time and x value during carbothermal reduction nitridation process on the phase composition and microstructure of as-fabricated Sialon-based materials were explored. The XRD results indicated that when sintering temperature is 1550°C, holding time is 6h, and x value is 1.0, Ca-α-Sialon/SiC/Fe3Si composites was successfully synthesized. The relative contentSubscript textof each phase in the products is I(α-Sialon): I(SiC): I(Fe3Si)=82:10:8. The SEM images showed the densificated microstructure and uniform grains with the long column shape.
Publisher
Trans Tech Publications, Ltd.
Reference10 articles.
1. Yuehui Meng, Wen Ni, Yuyan Zhang. China Mine Engineering, Vol. 39(2010), p.4. In Chinese.
2. Yun Wang Choi, Yong Jic Kim, Ook Choi, et al. Constr. Build. Mater., Vol. 23(2009), p.2481.
3. Chao Li, Henghu Sun, Jing Bai, et al. J. Hazard. Mater., Vol. 174(2010), p.71.
4. H S Hao, L H Xu, X M Zhang, et al. Rare Metal Materials and Engineering, Vol. 38(2009), p.670. In Chinese.
5. J H Li, H W Ma, W H Huang. J. Hazard. Mater., Vol. 166(2009), p.1535.