Studies on Carbon Deposited on Surface of Smoked Tile Made in Fukaya District

Abstract

The silver-glaze of smoked tile is so far considered to be high grade graphite deposited on surface. The electric resistivity of the surface of the samples made in Fukaya district is measured. Its value is essentially higher than that of artificial graphite. X-ray diffraction and electron diffraction studies on surface carbon chemically scrapped off from tile-body reveal that this carbon layer is not highly crystalline but amorphous. Observation by scanning electron microscope also shows that the deposited carbon has characteristics of pyrolytic carbon. On the basis of these experimental studies, it is concluded that the carbon deposited on surface of smoked tile is not high grade graphite but pyrolytic carbon with turbostratic structure.