KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.6, no.3, pp.196 - 199
Abstract
The solid transformation of tungsten trioxide to a cubic tungsten carbide via nilride has been studied. Product carbide particles possessed specific surface area of ca. 90 mag -I and average diameter of ca. 4 nm. Transmission electron microscope (TEM) exhibited that these particles formed porous aggregates with a spotty electron diffraction pattern. This provides an evidence that the topotactic solid transformation has been involved.