Preparation and Mechanism of Cordierite by Using Calcined Bauxite as Raw Material at Relatively Low Temperature

Abstract:

The cordierite was synthesized at relatively low temperature by pressureless sintering method, using calcined bauxite, talcum , quartz and feldspar as raw materials in this paper. The water absorption (Wa), porosity (Pa), bulk density (D_b) and bending strength of samples have been tested, and the synthetic process and mechanism have been investigated by XRD, SEM, and so on. The results showed that the cordierite could be synthesized at 1280°C and the range of synthetic temperature is 1160~1300°C, when the sample was sintered at 1280°C for 2h, its bulk density and bending strength were 2.20g/cm³ and 72.13MPa, respectively. XRD analysis showed that the main phase of sample was cordierite, the cordierite content was about 88wt%, and the minor phases were MgAl₂O₄ spinel and corundum. SEM results showed that the samples were dense and the pore sizes were 5 μm~100μm, the grains were growth and development well, the grains size were 0.5μm~6μm. High reaction activity corundum and mullite were provided by calcined bauxite, then coupled with the role of feldspar, thus reduced the synthetic temperature of cordierite.

• Periodical: Advanced Materials Research (Volumes 785-786)
• Pages: 1066-1071
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.785-786.1066
• Online since: September 2013
• Authors: Jian Feng Wu*, Bin Zheng Fang, Xiao Hong Xu, Xin Bin Lao
• Keywords: Calcined Bauxite, Cordierite, Microstructure, Reaction Mechanism, Synthesize Temperature

References

[1] Yuichi K, Katsuhiro S, Etsuro K. Ceram Int, Vol. 26 (2000), p.739.

[2] Chotard T, Soro J, Lemercier H, et al. J Eur Ceram Soc, Vol. 28 (2008), p.2129.

[3] Milan K N, Minati C. J Eur Ceram Soc, Vol. 24 (2004), p.3499.

[4] Xiaohong Xu, Deqiang You, Jianfeng Wu, et al. J Chin Ceram Soc (In Chinese), Vol. 32 (2004), p.481.

[5] Ben Peng, Changsheng Yue, Xiawei Gong, et al. J Univ Sci and Technol Beijing (In Chinese), Vol. 34 (2010), p.499.

[6] Goren R, Gocmez H, Ozgur C. Ceram Int, Vol. 32 (2006), p.407.

[7] Haizhu Guo, Qinrong Yao, Zhiwei Yu, et al. CN Patent, 1090262A. (1994).

[8] Zhongzheng Yang, Daoyuan Yang, Shunbo Zhao, et al. Materials Review (In Chinese), Vol. 24 (2010), p.502.

[9] Xiangchong Zhong and Guangping Li. J Chin Ceram Soc (In Chinese), Vol. 3 (1964), p.261.

[10] Shu Cai, Mingxia Xu, Jinyou Li, et al. J Chin Ceram Soc (In Chinese), Vol. 30 (2002), p.629.

[11] Xuebin Zhang, Xiangjun Ren, Songlin Wang, et al. J Chin Ceram Soc (In Chinese), Vol. 34 (2006), p.247.

[12] Haiqin Wen, Hongan Xi, Qin Li, et al. J Chin Ceram Soc (In Chinese), Vol. 38 (2010), p.347.

[13] Wen Ni and Nana Chen. J Miner and Petrology (In Chinese), Vol. 17 (1997), p.110.

[14] Xudong Luo, Dianli Qu, Guodong Zhang, et al. Chin J Inorganic Chemi (In Chinese), Vol. 27 (2011), p.434.

[15] Xiaohong Xu, Jianfeng Wu, Shuzen Sun, et al. J Chin Ceram Soc (In Chinese), Vol. 30 (2002), p.593.

[16] Qiang Ren and Xiulan Wu. Non-Metallic Mines (In Chinese), Vol. 29 (2006), p.29.

[17] Bing Zhang, Chuanbao Cao, Xu Xiang, et al. J Chin Ceram Soc (In Chinese), Vol. 31 (2003), p.1188.

[18] Qi Wang, Zhaohui Huang, Xin Yang, et al. J Chin Ceram Soc (In Chinese), Vol. 40 (2012), p.745.

[19] Kurama S, Ozel E, Ay N. Key Eng Mater, Vol. 264-268 (2004), p.925.

[20] Jiezheng Wu, Yuqing Chen, Lianxing Wang. J Chin Ceram Soc (In Chinese), Vol. 21 (1993), p.399.

[21] Tamborenea S, Mazzoni A D, Agliettie F. Thermochimica Acta, Vol. 411 (2004), p.219.