dc.description.abstract |
Graphite Intercalation Compounds (GIC) with HNO3 were chemically obtained using
different morphologies of natural graphite from Sri Lanka, Madagascar and Krömful.
X-ray powder patterns of the products showed the formation of second stage GIC
(HNO3). These compounds were used to produce exfoliated graphite at 550°C in air.
The expansion ratio was measured and compared with different types of natural
expanded graphite. Accordingly, the pellet type Madagascar graphite and KahatagahaKolongaha
shiny, slippery, fibrous graphite (KSSI; one of the morphology of natural
graphite of Sri Lanka) showed the greatest volumes of expansion. The samples with the
largest average particle sizes had the largest expansion volumes, which can be
explained by the proportionality between structural, morphological and textural
characteristics of expanded and raw graphite types |
en_US |