Thermogravimetry calcination temperature

Changes in catalysts during preparation, which often involves thermal calcination, oxidation, and reduction, can also be followed by recording the associated variations in sample weight, as in normal thermogravimetry (TG) or differential thermogravimetiy (DTG) or in sample temperature,... 

Thermogravimetry indicated a continuous weight loss of the sulfated sihca supported zirconia of only about 3 %. The thermogravimetric data on the catafysts prepared by reaction of zirconia with suUuric acid were more informative (see also ref. [12]). When the temperature was raised with 10 K/min, the catalyst prepared by reaction with calcined zirconia showed a much more smooth weight loss, which set on already at about 350 K. Apparently, it is much more difficuh to remove the constituents of sulfuric acid out of the much more porous structure of the zirconium hydroxide. 

For the purpose of ceramic synthesis, the ability to react with another material is most important. Table 8.2 lists the source of iron oxide and the temperature at which the reaction with lithium carbonate was 85% complete. The temperatures selected for the calcination of each starting compound had been determined by thermogravimetry (TG) as the minimum temperature necessary to completely... 

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