| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic nanoparticle with high saturated magnetic moment and its dispersion. <P>SOLUTION: This zinc-based ferrite magnetic nanoparticle is obtained by mixing a solution containing MX<SB>p</SB>-nH<SB>2</SB>O (M: Ni or Co; X: every halogen element; p and n: every positive real number including 0), a solution containing ZnX<SB>p</SB>-nH<SB>2</SB>O, a solution containing FeX<SB>p</SB>-nH<SB>2</SB>O, and a solution containing Na<SB>2</SB>SiO<SB>3</SB>-mH<SB>2</SB>O (m: every positive real number including 0), and firing the formed precipitate, mainly comprises amorphous SiO<SB>2</SB>and an M<SB>(1-i)</SB>Zn<SB>i</SB>Fe<SB>2</SB>O<SB>4</SB>(0.2≤i≤0.9) nanoparticle having a mean particle size of 5-20 nm, wherein the nanoparticles are held in a separated state by the reticulated membrane of the amorphous SiO<SB>2</SB>. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
