Generation of mixed metal oxides by use of an ultrasonic aerosol thermal decomposition process

A novel technique involving the pyrolysis of an ultrasonically atomized solution has been used to prepare finely dispersed submicron sized spinel-type Cu 1.1Mn 1.9O 4 powders with spherical morphology. The decomposition temperature of the aerosol as well as the total concentration of the solution ha...

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Bibliographic Details
Published inSolid state ionics Vol. 101; pp. 85 - 89
Main Authors Fortunato, P., Reller, A., Oswald, H.R.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.1997
Subjects
Catalytic oxidation
Spinel
Ultrasonic spray pyrolysis
Catalytic oxidation
Ultrasonic spray pyrolysis
Spinel
CuMn 2O 4
CO
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Summary:A novel technique involving the pyrolysis of an ultrasonically atomized solution has been used to prepare finely dispersed submicron sized spinel-type Cu 1.1Mn 1.9O 4 powders with spherical morphology. The decomposition temperature of the aerosol as well as the total concentration of the solution have been varied to study the influence on the structural, thermochemical and morphological features. Together with X-ray diffractometry (XRD), thermal analysis (TA), and X-ray photoelectron spectroscopy (XPS) results it became obvious that the Cu 1.1Mn 1.9O 4-spinel exists in a metastable state. Turnover-rates of catalytic CO-oxidation with molecular oxygen near room temperature gave good yields, but depended on the activation procedure of the spinel.
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(97)84013-1