期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 166, 期 2-3, 页码 1535-1539出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2008.11.059
关键词
Mullite ceramics; Fly ash; V2O5
资金
- National Natural Sciences Foundation of China [40602008]
- State Key Laboratory of Geological Processes and Mineral Resources [GPMR0739]
- National Laboratory of Mineral Materials [08A002]
- National Basic Research Program of China [2006CB202202]
In this communication, high-strength mullite ceramics was prepared from bauxite and high-aluminum fly ash that is a by-product of coal combustion in thermal power plants. The effects of the doping V2O5 on the bulk density, apparent porosity, bending strength and microstructure of mullite ceramics were studied in detail. It was indicated that 5-10 mol% V2O5 reduced the sintering temperature by 50 degrees C. The apparent porosity and water absorption of the mullite ceramics decreased with increasing V2O5 content. Mullite ceramics with bending strength as high as 108 MPa were obtained at 1500 degrees C with the addition of 10 mol% V2O5. X-ray diffraction analysis suggested that the prepared ceramics was mainly in phase of mullite, and scanning electron microscope images confirmed that it mostly existed in the shape of a long parallelepiped. This research may provide a new method in utilizing the vast resources of fly-ash waste from power plants in the production of low-cost mullite-based engineering materials. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据