Journal ArticleDOI
The Coprecipitation of Zinc Aluminium Hydroxide Powders from Aqueous Solution with Sodium Hydroxide: Precipitate Compositions and Coprecipitation Mechanisms
A. Packter,A. Derry +1 more
TLDR
In this paper, Zine aluminium hydroxides were coprecipitated from different mixed metal cation solutions, at CM tot = 0.1 M and at Zn/Al2 ratios from 1 to 4, with sodium hydroxide solution.Abstract:
Zine aluminium hydroxides were coprecipitated from different mixed metal cation solutions, at CM tot = 0.1 M and at Zn/Al2 ratios from 1 to 4, with sodium hydroxide solution. The coprecipitations were monitored by potentiometrie (pH) titration and the final coprecipitate compositions were examined by chemical analysis, infra-red spectrophotometry and thermal analysis.
Generally, microcrystalline aluminium hydroxide was first precipitated at pH about 4; this then partially redissolved on further addition of sodium hydroxide (to form hydroxoaluminate anion) and zinc aluminium hydroxide coprecipitates were formed continuously at pHs from 5.5–6 to above 9. Their compositions were similar to the magnesium hydroxoaluminate coprecipitated from magnesium aluminium solutions.
At Zn/Al2 ratio = 1, the main phase was probably Zn(H2O)n [Al(OH)4]2; at Zn/Al2 ratio = 2, the main phase was probably Zn2(H2O)n [Al2(OH)10], whereas at Zn/Al2 ratio = 4, the main phase was probably Zn(H2O)n(OH)4[Al2(OH)10].read more
Citations
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Synthesis of zinc oxide nanoparticles with controlled morphology
Lingna Wang,Mamoun Muhammed +1 more
TL;DR: A chemical precipitation method has been used for the synthesis of ZnO nanoparticles with controlled morphology as mentioned in this paper, where the precursor powders were prepared using several precipitation reagents and using ammonium carbamate as a precipitating reagent led to unusual rod shape morphology.
Journal ArticleDOI
Influence of magnesium content on the corrosion resistance of the cut-edges of Zn–Mg-coated steel
TL;DR: The ability of Zn-mg coatings to protect steel sheets has been evaluated with local electrochemical techniques (scanning vibrating electrode technique, microcapillary electrochemical cell) and rotating disk electrode, and compared with the corrosion protection afforded by a pure zinc coating.
Journal ArticleDOI
The precipitation of alkaline-earth metal-nickel, aluminium (chromium (III) and iron (III)), silicyl(titanyl and zirconyl) hydroxide, carbonate and oxalate precipitate precursors for alkaline-earth metal oxyanion salt ceramics and allied materials – a review of small scale laboratory studies and industrial patents
TL;DR: The coprecipitations of these precursor materials, their compositions and the cop-recipitation mechanisms are reviewed and the relevant industrial patents are described in this paper, where small-scale laboratory studies on the coprecimitation of these precursors are reviewed.
References
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Journal ArticleDOI
Zinc Hydroxide: Solubility Product and Hydroxy-complex Stability Constants from 12.5–75 °C
TL;DR: In this article, the atomic absorption measurements of zinc hydroxide have been used for evaluation of the solubility at 12.5, 25.0, 50.0 and 75.0 °C from pH 6.7 to pH 13.8.
Journal ArticleDOI
Löslichkeitsprodukte von Metalloxiden und -hydroxiden. 9. Mitteilung. Löslichkeitsprodukte und Freie Bildungsenthalpien von Zinkoxid, amorphem Zinkhydroxid, β11-,β2-, γ-, δ- und ϵ-Zinkhydroxid
TL;DR: In this article, the solubility of zinc hydroxides and zinc oxide was investigated by determining [Zn2+] and [H+] of solutions in contact with the solid phases.