Synthesis and properties of Mg-Zn-Al-SO4 hydrotalcite-like compounds

• Published in: Journal of materials science Vol. 28; no. 10; pp. 2769 - 2773
• Main Authors: KOOLI, F, KOSUGE, K, HIBINO, T, TSUNASHIMA, A
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.01.1993
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Inorganic compounds; Physics; Salts; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Temperature; Heat treatment; Transition metal Compounds; X ray fluorescence; Aluminium Magnesium Zinc Hydrates Hydroxides Sulfates Mixed; Thermogravimetry; Operating mode; Composition effect; Differential thermal analysis; Experimental study; Lattice parameters; Solid solution; X ray diffraction; Inorganic compound; Transmission electron microscopy; Oxysalt; Carbonates; Infrared spectrum; Coprecipitation; Growth from solution
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/BF00356216

Sulphate-based magnesium-zinc-aluminium synthetic hydrotalcite-like compounds were prepared by coprecipitation with a sodium hydroxide solution. The corresponding metal solutions were coprecipitated at pH 10, aged in the mother liquor, washed several times and dried at 40 C. Whatever the ratio of metal ions in the initial metal sulphate solutions, hydrotalcite compounds were formed during coprecipitation. The temperature of preparation and ageing time did not affect the final crystal structure. By comparing the properties of the Mg-Al layered compounds, it seems that when the zinc content increases, the thermal stability of the hydrotalcite-like compounds decreases. 18 refs.