Adsorption of <TEX>$alpha$</TEX>-Fe2O3 on the Surface of Mica Particles

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J. Korean Ceram. Soc. > Volume 24(3); 1987 > Article

Journal of the Korean Ceramic Society 1987;24(3): 215.

운모표면에 대한 $alpha$산화철 흡착

김대웅, 조동희¹, 김명숙², 박면용²

고려화학(주) 연구소
¹한국섬유공사 시험소
²건국대학교 화학과

Adsorption of $alpha$-Fe2O3 on the Surface of Mica Particles

ABSTRACT

${alpha}$-Ferric Hydrous Oxide and ${alpha}$-Ferric Oxide were obtained as following processes that Ferric Nitrate solution was adjusted to pH 6-8 with Ammonium Hydroxide, refluxed the Iron precipitate for 1 hr. at 80$^{circ}C$, washed it with water and Methanol (95%), dried it to obtain ${alpha}$-Ferric Hydrous Oxide at 60$^{circ}C$, and then heated in atmosphere to prepare ${alpha}$-Ferric Oxide for 1 hr. at 450$^{circ}C$. Mica particles cleaned with ultrasonicator (45KHz) in water were mixed with Ferric Nitrate solution and treated it to adsorb ${alpha}$-Ferric Oxide on the surface of mica particles by using the abovementioned processes, but the heated temperature was at 500$^{circ}C$. The maximum wavelength of reflected light on the surface of mica-${alpha}$-Ferric Oxide (50%) was appeared at 546nm but -Ferric Oxide free mica only was at 436 nm. The maximum wavelength was shifted to longer when the weight ratios of ${alpha}$-Ferric Oxide to mica was changed from 1% to 50%.