Thermal gravimetric analysis 874 INDEX

Ellipsometry and Thermal Gravimetric Analysis. Ellipsometry was performed on thin film samples deposited on silicon substrates to determine film Sickness and refractive index. Table I lists values of thickness and refractive index for films prepared from A2(fresh) and A2(aged) sols after varying periods of aging (prior to... 

Rychly and Pavlinec have developed a method for analysing thermo-gravimetric data for multi-step processes obtained under non-isothermal conditions to provide kinetic data for each step [38]. Rychly and co-workers have applied this and other methods to a detailed study of the flame retardant effects of fillers [36]. In addition to the oxygen index, they used an ignition test based on an adapted thermal analysis method to assess flammability. 

The cobalt content was determined by atomic absorption at the service central d analyse du CNRS (Vemaison, France). Differential thermal and thermo gravimetric analyses (DTA/TG) were conducted in flowing air (75 mL min ) at a heating rate of 5°C min . Surface area analysis was performed using the BET method. N2 was selected as the adsorbent, and analysis was performed at liquid nitrogen temperature (-196 C). X-ray diffraction (XRD) measurements were made at room temperature (X =1.5418 A). The diffraction patterns have been indexed by comparison with the Joint Committee on Powder Diffraction Standards (JCPDS) files. Temperature Programmed Reduction (TPR) was performed using a 5% H2/Ar mixture (30 inL min - 5°C min ). 

---