In order for pH to become with 10.8 - 11.5 the occasion where it mixes with the alkaline aqueous solution which

摘要

PPROBLEM TO BE SOLVED: To provide titanium-containing compound iron oxide particles containing a large amount of titanium, particularly having a high FeO content and excellent in blackness. PSOLUTION: This black compound iron oxide particle is characterized in that the titanium content is in the range of 3-12 wt% and the FeO content is in 31.5-36 wt%. PCOPYRIGHT: (C)2006,JPO&NCIPI