Patent ID: 6207279
Filing Date: 2001-03-27
Classification: B82Y,C01G,C01P,G11B,Y10T

Abstract:
High-density acicular hematite particles comprising acicular hematite particles and a coat comprising an oxide of tin or oxides of tin and antimony, formed on at least a part of surfaces of said acicular hematite particles; andhaving an average major axial diameter of not more than 0.3 .mu.m, a pH value of not less than 8, a soluble sodium salt content of not more than 300 ppm, calculated as Na, a soluble sulfate content of not more than 150 ppm, calculated as SO.sub.4, and a volume resistivity of 10.sup.3 to 5.times.10.sup.7 .OMEGA.cm.