TITANIUM DIOXIDE PIGMENT PARTICLES WITH DOPED, DENSE SIO2 SKIN AND METHODS FOR THEIR MANUFACTURE

摘要

A METHOD OF PREDICTING PHOTOSTABILITY OF COATINGS WITH VARIOUS DOPANTS ON TITANIUM DIOXIDE PIGMENT PARTICLES IS DISCLOSED. CALCULATIONS OF THE DENSITY OF STATES SHOW THAT A DOPED COATING WHICH REDUCES THE DENSITY OF STATES NEAR THE BAND EDGE OR INCREASES THE DENSITY OF STATES WITHIN THE BAND GAP OF THE PIGMENT PARTICLES INCREASES THE PHOTOSTABILITY OF THE DOPED PIGMENT.