Experimental set up for determining the temperature-oxygen partial pressure conditions during synthesis of spinel oxide nanoparticles - Archive ouverte HAL
Article Dans Une Revue Solid State Ionics Année : 1997

Experimental set up for determining the temperature-oxygen partial pressure conditions during synthesis of spinel oxide nanoparticles

Résumé

Nanometric spinel oxide powders, Fe 3 MaO4, where M is a transition element, have been synthetized by soft chemistry. This method generally leads to a non-stoichiometric phase, Fe 3 ~M O~+~ where 6 is the deviation from stoichiometry so that further annealing at low temperatures around 450°C and low oxygen partial pressure around 10-25 Pa given by N2/H2/H20 gas mixtures is required: this enables a stoichiometric compound to be obtained and a nanometric size to be maintained. The complete set up consisting of a gas mixer, a thermogravimetric apparatus and a preparative furnace is described. Some results concerning the conditions of temperature and oxygen partial pressure leading to stoichiometry are given in the case of vanadium ferrites containing or without Co.

Dates et versions

hal-04241965 , version 1 (14-10-2023)

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Citer

D Aymes, Nadine Millot, Virginie Nivoix, Pascal Perriat, B Gillot. Experimental set up for determining the temperature-oxygen partial pressure conditions during synthesis of spinel oxide nanoparticles. Solid State Ionics, 1997, 101-103, pp.261-264. ⟨10.1016/S0167-2738(97)84040-4⟩. ⟨hal-04241965⟩
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