Paper Title:
Influence of MgO on Properties and Microstructure of Mullite Ceramics Synthesized from Coal Fly Ash
  Abstract

The effects of MgO and temperature on the properties and microstructure of mullite ceramics synthesized from high-aluminium coal fly ash and bauxite are investigated in this paper. The results show that when the batch containing 4 wt% MgO is heated from 1100 °C to 1500 °C, the bulk density and flexural strength increase obviously with the sintering temperature rising, mullite ceramics with flexural strength as high as 169 MPa can be obtained at 1500 °C with the addition of 2 wt% MgO. According to the XRD results, the corundum, cordierite and cristobalite phases disappear completely upon 1400 °C, it indicates that MgO addition may effectively promote sintering process. The results of SEM indicate that the prepared ceramics mainly exist in the shape of long parallelepipeds with the aspect ratio of about 7-10.

  Info
Periodical
Advanced Materials Research (Volumes 295-297)
Chapter
Chapter 1: Materials Properties
Edited by
Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu
Pages
969-973
DOI
10.4028/www.scientific.net/AMR.295-297.969
Citation
J. H. Li, L. X. Tong, L. Hou, J. Shen, "Influence of MgO on Properties and Microstructure of Mullite Ceramics Synthesized from Coal Fly Ash", Advanced Materials Research, Vols. 295-297, pp. 969-973, 2011
Online since
July 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hua Zhang Zhai, Hong Nian Cai, Xiao Zhan Yang, Jian Bao Li, Gang Feng Guo, Chuan Bao Cao
Abstract:A series of BN-SiO2 composite ceramics with high relative densities have been fabricated by hot pressing of a mixture of hexagonal boron...
1426
Authors: Weon Ju Kim, Seok Min Kang, Ji Yeon Park
Abstract:Silicon nitride (Si3N4) ceramics have been considered for various components of nuclear power plants such as mechanical seal of reactor...
259
Authors: Xin Yan Yue, Jian Jun Wang, Qi Sun, Hong Qiang Ru
Chapter 2: Engineering Ceramics and Ceramic Composites
Abstract:SiC-TiB2 composite was prepared at 2298 K by using pressureless sintering. The microstructures and mechanical properties of the SiC-TiB2...
812
Authors: Cong Cong Jiang, Guo Zhong Li, Qi Jin Li
Chapter 7: Building Materials
Abstract:A light porous sintered material was prepared with red mud, fly ash, silica fume as the main raw materials, mixed with a certain amount of...
1537
Authors: Hai Jiang, Chun Yan Tian
Chapter 2: Micro/Nano Materials and Equipments
Abstract:Silicon nitride nanoceramics were fabricated by hot press sintering two kinds of Si3N4 nano-sized powders. The effect...
239