| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ferrite particle having not only high resistance and a high magnetic characteristic but also high electro-static chargeability. <P>SOLUTION: This ferrite particle contains, as a principal component, a material expressed by composition formula: M<SB POS="POST">X</SB>Fe<SB POS="POST">3-X</SB>O<SB POS="POST">4</SB>(M is at least one kind of metal selected from the group comprising Mn, Mg, Ti, Cu, Zn and Ni, and 0≤x≤1), and contains an alkaline earth metal element. The alkaline earth metal element is formed not into magnetoplumbite type crystal structure but into solid solution to spinel crystal structure. At least one of Sr and Ba is preferable as the alkaline earth metal element, and Sr is more preferable. The content of the alkaline earth metal element is preferably 3 mol% or less. <P>COPYRIGHT: (C)2012,JPO&INPIT |
