A NEW SIMPLE PROCESS FOR CARBON COATING OF CERAMIC PARTICLES USING POLY(VINYL CHLORIDE)

Carbon-coated ceramic particles (Al2O3, SiO2, TiO2, MgO, CaO) were obt ained by a simple mechanical mixing of these ceramic particles with po ly(vinyl chloride) (PVC) powders and heating at a temperature between 600 and 1200 degrees C in an inert atmosphere. Carbon coating of indiv idual particles was successfully achieved by selecting an appropriate mixing ratio between PVC powders and ceramic particles, gamma-Al2O3 wi th high surface area having a wide range of this mixing ratio for coat ing. The carbon layers coated on the ceramic particles seemed to adher e tightly, but were pervious to air. (C) 1998 Published by Elsevier Sc ience Limited. All rights reserved.