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首页> 外文期刊>IEEE Transactions on Magnetics >(Ni,Ti), (Ni,Sn) and (Zn,Ti) substituted barium ferrite particles prepared by a flux method with /spl delta/-FeOOH as a precursor
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(Ni,Ti), (Ni,Sn) and (Zn,Ti) substituted barium ferrite particles prepared by a flux method with /spl delta/-FeOOH as a precursor

机译:以/ spl delta / -FeOOH为前体的助熔剂法制备的(Ni,Ti),(Ni,Sn)和(Zn,Ti)取代钡铁氧体颗粒

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摘要

BaFe/sub 12-2x/M/sub x/M'/sub x/O/sub 19/ particles, (M,M') representing (Ni,Ti), (Ni,Sn), and (Zn,Ti) were prepared by a modified flue method using /spl delta/-FeOOH as a precursor and NaCl as the flux. The substitution with (Ni,Ti), or (Ni,Sn) lowers coercivity effectively to 650 to 1600 Oe, however deteriorates saturation magnetization to the level of 25 to 45 emu/g. The substitution with (Zn,Ti) reduces both particle size and coercivity, while retaining high saturation magnetization. BaFe/sub 12-2x/Zn/sub x/Ti/sub x/O/sub 19/ (x=0.75 or 1) particles, being calcined at 950/spl deg/C to 1000/spl deg/C for 4 hours, have a coercivity of 1200 to 1880 Oe, a saturation magnetization of 59 to 62 emu/g, and an average particle size of around 100 nm with fine platelet shape. They may find applications as recording media.
机译:BaFe / sub 12-2x / M / sub x / M'/ sub x / O / sub 19 /粒子,(M,M')代表(Ni,Ti),(Ni,Sn)和(Zn,Ti)通过改进的烟道方法,使用/ spl delta / -FeOOH作为前体,并用NaCl作为助熔剂,制备了三氟甲烷。用(Ni,Ti)或(Ni,Sn)替代可有效将矫顽力降低至650至1600 Oe,但是会使饱和磁化强度降低至25至45 emu / g。用(Zn,Ti)取代可降低粒径和矫顽力,同时保持高饱和磁化强度。 BaFe / sub 12-2x / Zn / sub x / Ti / sub x / O / sub 19 /(x = 0.75或1)颗粒,在950 / spl deg / C到1000 / spl deg / C煅烧4小时,具有1200至1880Oe的矫顽力,59至62emu / g的饱和磁化强度,以及具有细片状的平均粒径约100nm。他们可能会找到应用程序作为记录媒体。

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