... Section 1 Minerals and Glasses Infrared Spectroscopy – Materials Science, Engineering and Technology 18 infrared spectroscopy, to obtain an overall picture of ... (H2O, CO2) Infrared Spectroscopy – Materials Science, Engineering and Technology 30 Fig. 10. a) TG and EGA(H2O,CO2) curves of the 40-hours high-energy milled Na2CO3–Nb2O5 powder ... shorter milling times, i.e., 1, 5 and 20 hours, indicating a more uniform decomposition of the carbonate. Infrared Spectroscopy – Materials Science, Engineering and Technology 34therefore depend...