INVESTIGATIONS ON THERMAL-STABILITY OF ADDUCT ALUMINUM NITRATE(V)-UREA (1 6)/

The adduct of Al(NO3)(3) . 6CO(NH2)(2) has been prepared and character ized by means of chemical analysis, IR spectroscopy, X-ray patterns an d microscopy. A thermoanalytical study of Al(NO3)(3) . 6CO(NH2)(2) as well as urea, for comparison purposes, under conventional dynamic and quasi-isothermal - quasi-isobaric conditions in air has been carried o ut. It has been found that the adduct is thermally stable up to about 200 degrees C, i.e. up to higher temperature than the decomposition te mperature of the constituent compounds. The thermal decomposition mech anism of the adduct is complex, thus infrared spectroscopy and X-ray d iffraction techniques have been used to determine the intermediate pro ducts. Aluminium oxide(III) is the final decomposition product.