Abstract
After a single crystal of ZrC was dissolved in a HF/H2SO4 solution for about one year, single crystals of ZrF4 and soot were formed. The soot was found to be amorphous carbon by Raman spectroscopy and contain a very smallamount of fluorine by X-ray photoelectron spectroscopy (XPS). Transmission electron microphotograph (TEM) revealed that the soot is flaky in an irregular shape of 0.1 to 7μm size, insidewhich fine particles in a size of 20 to 100 nm are included. The particles were confirmed to be 2H-WC by energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD). The surface area of the soot was measured to be about 30 m2/g.
