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Kinetice and thermodynamics of zine phosphate hydrate synthesized by a simple rout in aqueous and acetone media / Banjong Boonchom in Industrial & engineering chemistry research, Vol. 49 N° 8 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp. 3571–3576 Titre : Kinetice and thermodynamics of zine phosphate hydrate synthesized by a simple rout in aqueous and acetone media Type de document : texte imprimé Auteurs : Banjong Boonchom, Auteur ; Rattanai Baitahe, Auteur ; Samart Kongtaweelert, Auteur Année de publication : 2010 Article en page(s) : pp. 3571–3576 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Thermodynamics  Zinc  Phosphate  Hydrate  Acetone Résumé : Zinc phosphate (Zn3(PO4)2·4H2O) was prepared by a simple route using ZnO and H3PO4 in aqueous and acetone media at ambient temperature. Zn3(PO4)2·4H2O decomposes to Zn3(PO4)2 by three dehydration reactions, as revealed by thermal analytical (TG/DTG/DTA) and differential scanning calorimetry (DSC) techniques. The synthesized Zn3(PO4)2·4H2O and its dehydration product Zn3(PO4)2 were characterized by powder X-ray diffraction, Fourier transfer infrared, and scanning electron microscopy. Kinetic triplet parameters (activation energy, E; preexponential, A; Avrami exponent, n) and thermodynamic functions (ΔH*, ΔG*, and ΔS*) of three dehydration reactions are calculated by DSC experiments. Evaluation and control of the specific characteristics of three dehydration processes of Zn3(PO4)2·4H2O are essentially important in the variously oriented studies, which were discussed from the viewpoints of thermal stability based on kinetics and thermodynamics. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901626z [article] Kinetice and thermodynamics of zine phosphate hydrate synthesized by a simple rout in aqueous and acetone media [texte imprimé] / Banjong Boonchom, Auteur ; Rattanai Baitahe, Auteur ; Samart Kongtaweelert, Auteur . - 2010 . - pp. 3571–3576. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp. 3571–3576 Mots-clés : Thermodynamics  Zinc  Phosphate  Hydrate  Acetone Résumé : Zinc phosphate (Zn3(PO4)2·4H2O) was prepared by a simple route using ZnO and H3PO4 in aqueous and acetone media at ambient temperature. Zn3(PO4)2·4H2O decomposes to Zn3(PO4)2 by three dehydration reactions, as revealed by thermal analytical (TG/DTG/DTA) and differential scanning calorimetry (DSC) techniques. The synthesized Zn3(PO4)2·4H2O and its dehydration product Zn3(PO4)2 were characterized by powder X-ray diffraction, Fourier transfer infrared, and scanning electron microscopy. Kinetic triplet parameters (activation energy, E; preexponential, A; Avrami exponent, n) and thermodynamic functions (ΔH*, ΔG*, and ΔS*) of three dehydration reactions are calculated by DSC experiments. Evaluation and control of the specific characteristics of three dehydration processes of Zn3(PO4)2·4H2O are essentially important in the variously oriented studies, which were discussed from the viewpoints of thermal stability based on kinetics and thermodynamics. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901626z