Preparation of Calcium Hexaluminate Using Al2O3 and White Beach Sand from Western Australia

Chun Yan Zeng; Zhao Hui Huang; Jun Tong Huang; Yan Li; You Guo Xu; Shuai Yi; Ming Hao Fang; Yan Gai Liu

doi:10.4028/www.scientific.net/KEM.512-515.940

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Preparation of Calcium Hexaluminate Using Al2O3...

Preparation of Calcium Hexaluminate Using Al₂O₃and White Beach Sand from Western Australia

Abstract:

Calcium hexaluminate (CA6) because of its high stability, high melting point and low thermal conductivity properties make it as a new high-temperature insulation materials are valued. In this paper, chemical analysis and XRD were used to investigate the composition of the white beach sand mineral from Perth coast of Western Australia. The main composition of it was carbonate. White beach sand as calcium source respectively, and industrial alumina as aluminum source synthesized CA₆ at 1550°C-1650°C for 3h. The results showed that: synthetic CA₆ shapes in platelet crystalline. Influence of different amounts of alumina and sintering temperature on synthesis of calcium hexaluminate are studied.The main phase of the samples with different amounts of alumina which decrease or increase 5%, 10% and 15% alumina around theory are CA₆. The porosity of the samples obtained is about 53%. The bending strength of Sample S-0 of theoretical ratio values up to 7.73Mpa. Sintering temperature from 1500°C to 1650°C is not conductive to the improvement of apparent porosity of CA₆ materials.

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Key Engineering Materials (Volumes 512-515)

Pages:

940-944

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.940

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Online since:

June 2012

Authors:

Chun Yan Zeng, Zhao Hui Huang, Jun Tong Huang, Yan Li, You Guo Xu, Shuai Yi, Ming Hao Fang, Yan Gai Liu

Keywords:

CA₆, Industrial Alumina, Sintering Temperature, White Beach Sand

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References

[1] J. M. Tulliani, G. Pagès, G. Fantozzi, et al, Dilatometry as a tool to study a new synthesis for calcium hexaluminate, J.Therm. Anal. Calorim. 72 (2003)1135-1140.

Google Scholar

[2] M Fuhrer, A Hey, W E Lee, Microstructure evolution in self-forming spinel/calcium aluminate-bonded castable refractories, J. Eur. Ceram. Soc.18 (1998)813-820.

DOI: 10.1016/s0955-2219(97)00182-9

Google Scholar

[3] C .C. Feng, K.Y. Chao, Effect of CaO content on the hot strength of Alumina-Spinel castables in the temperature range of 1000℃ to 1500℃, J. Am. Ceram. Soc. 81 (1998)2957-2960.

DOI: 10.1111/j.1151-2916.1998.tb02719.x

Google Scholar

[4] L. An, H. M. Chan, Control of calcium hexaluminate grain morphology in in-situ toughened ceramic composites, Mater. Sci. 31 (1996)3223-3229.

DOI: 10.1007/bf00354672

Google Scholar

[5] J. L. Mendoza, A Freese, R E.Moore, Thermalmechanical behavior of calcium aluminate composites, Ceram. Trans. Adv. Refract. Technol. 10 (1990)162-167.

Google Scholar

[6] V. K. Singh, K. K. Sharma, Low-Temperature Synthesis of Calcium Hexa-aluminate, J. Am. Ceram. Soc. 4 (2002)769-772.

Google Scholar