MATERIALS TESTE rutile

Thus, given the suitability of the exponential decay model the effective and true extinction coefficients (cXcat, Peat) can be estimated for various catalysts. Uie numerical values of the coefficients are reported in the 2 and S columns of Table 4.4. In this respect, there are significant differences in the Peat values for various materials tested, with this coefficient ranging from 8.3 Lg for Rutile 1 sample to 55.3 L g for Degussa P25 catalyst. 

Differential thermal analysis, normally abbreviated DTA , is based on the following measuring principle In a furnace, two small identical crucibles are placed. In each of the crucibles, a thermocouple is mounted so that the crucible temperature can be registered. In one of the crucibles, a sample of the material to be tested is placed in the other crucible, a corresponding amount of an inactive substance, for example rutile Ti02, is placed. Typically, the quantity to be tested is a few milligrams. 

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