Microscope, Vol 59:4, p.175-180
Chepaitis, Millette, Vander Wood
The mechanism of formation of a plerosphere, a type of coal fly ash particle that contains microspheres, has proven difficult to describe, especially when considering the role of the hollow spheres named cenospheres. Thirteen fly ash samples were studied using scanning electron microscopy (SEM) and X-ray energy dispersive spectrometry (EDS) in order to gather new information about the basic mechanism. The identification and study of thin-walled cenospheres provides key evidence in support of a previously proposed theory in which plerospheres are formed by the capture of smaller fly ash spheres after implosion of cenospheres.
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