
Micro-Structural Investigation of Graphite Powders 455
FIGURE 54 Impurity particles associated with pitting (13k and 60k x magnification)
samples coupled with the enormous impact catalyst activity has on reactivity, demon-
strates the folly of simply checking the impurity levels or ash content as a basis for
reactivity comparison.
14.3.5 INHIBITING IMPURITIES
The last morphological characteristic which has not been accounted for is the presence
of spiked or saw-tooth like edge formations found in the natural graphite samples, as
can be seen in Figure 55.
FIGURE 55 ...