• Pataric, Aleksandra
• Mihajlovic, Slavica
• Djordjevic, Natasa

Abstract

<jats:p>During mechanical activation, the energy of treated material is raised to ahigher level that can lead to the chemical transformation of the activatedmaterial. This is the point that should be considered as a phenomenon of themechanochemical transformations appearing as a result of mechanicalactivation. Sodium carbonate as a substance that is often subjected tomechanochemical synthesis was mechanically activated in this study. Thesubject was the monitoring of changes in the physico-chemicalcharacteristics of sodium carbonate after exposure to different degrees ofactivation time within the range of 1-28 minutes. After activation, thesamples were deposited in three environments, CO2, air, and vacuum, at roomtemperature, in a period of 64 days. The mass changes occurring during thetreatment were measured depending on the processing environment. Increasingthe mass was evident and was attributed to the chemisorption of moisture andcarbon dioxide present in the air as a consequence of the sodium carbonateactivation. The methods also used were calcimetric chemical analysis andX-ray structural analysis. According to obtained results, it was found thatactivated sodium carbonate is mass-transformed into sodium bicarbonate,whereby these changes are functionally dependent on activation time and theprocessing environment.</jats:p>

Topics

• impedance spectroscopy
• Sodium
• activation