WHITE CONDUCTIVE POWDER AND ITS APPLICATION

摘要

PROBLEM TO BE SOLVED: To provide a white conductive powder which is excellent in long-term stability and has good conductivity while it does not contain antimony questionable about safety and which has high whiteness and is of low cost without using an expensive indium. SOLUTION: The white conductive powder comprises a white inorganic pigment particle having on its surface a coating layer comprising tin dioxide containing a tungsten element or coating layers consisting of an inner layer comprising tin dioxide and an outer layer comprising tin dioxide containing a tungsten element. The white inorganic pigment particle is safe and inexpensive, and exhibits high conductivity and long-term stability. It can be blended with a white conductive resin composition and can be used for, e.g. an external additive for an electrophotographic toner.