α-Al₂O₃ Flake Pink Powder Synthesized by Molten Salt Method

Abstract:

In the paper, the flaky alumina was synthesized using Na2SO4-K2SO4 as flux by the molten salt method. The mole ratio of molten salt to alumina, temperature of synthesis and the amount of Cr3+ were investigated. The size of flake alumina was analyzed by laser sizer, the phases of the reaction products and the microstructures at different Cr3+ doping content was ascertained by XRD and the surface of flake alumina was observed by SEM. The alumina with two-dimensional planar structure, a large aspect ratio and adapting to preparation of pearlescent pigment was synthesized under the mole ratio of molten salt to alumina between 4 to 5 , the synthesis temperature about 1200°C, the heat preservation time in 4h and the mole amount of Cr2O3 about 2%.

• Periodical: Advanced Materials Research (Volumes 105-106)
• Pages: 830-832
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.105-106.830
• Online since: April 2010
• Authors: Qian Zhang, Sheng Wen Zhong, Yu Xiang Wang
• Keywords: Alumina, Molten Salt Method, Pearlescent Pigment

References

[1] G. Pfaff. Special : Inorg. Mater. Vol, 39(2003), p.123.

[2] K. Nitta, T.K. Shau, J. Sugahara, et at.:U.S. Patent 5702519(1997).

[3] A. Kebbede, AH. Carim , J. Parai: J. Am. Ceram. Soc. Vol. 83(2000), p.2845.

[4] S. Yasuo,O. Kiichi,F. Takeshi: U.S. Patent 6080380(2000).

[5] J. Xihai, G. Lian:J. Am. Ceram. Soc. Vol. 87(2004), p.533.

[6] S. Hashimoto, A. Yamaguchi: J. Mater. Res. Soc. Vol. 14 (1999), p.4667.

[7] K. Saegusa: U.S. Patent 4882113(1989).