Rheological behaviour and heat effects during the formation and phase transformation of silver oxide gels obtained by precipitation

Autor:	Edouard Plasari, P Remy, Ph Marchal, Hervé Muhr, R. Vivier
Rok vydání:	2002
Předmět:	Exothermic reaction chemistry.chemical_compound Silver nitrate Chromatography Chemical engineering chemistry Rheology Precipitation (chemistry) General Chemical Engineering Phase (matter) Mixing (process engineering) Silver oxide Suspension (chemistry)
Zdroj:	Powder Technology. 128:178-187
ISSN:	0032-5910
DOI:	10.1016/s0032-5910(02)00195-x
Popis:	Freshly precipitated silver oxide gel obtained from the addition of alkali in silver nitrate solution of high concentrations is suspected to have quite non-Newtonian properties. The knowledge of its rheological behaviour can be helpful when choosing the mixing device for precipitation reactors. In this paper, the rheological behaviour of the concentrated suspension is investigated and the choice of appropriate mixer is discussed. During the precipitation, the temperature evolution exhibits two steps: the exothermic reaction is supposedly responsible for the first step, the second one seems to occur exactly when the gel is breaking down. Hence, a calorimetric study is also carried out in order to investigate this phenomenon linked to the rheological behaviour.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ee5180df123582854b34ffa553f0082 https://doi.org/10.1016/s0032-5910(02)00195-x Zobrazit plný text záznamu Full Text from ScienceDirect