【作者】 程知萱； 潘庆谊； 张剑平； 董晓雯； 王廷富；

【Author】 CHEN Zhi-xuan;PAN Qing-yi;ZHANG Jian-ping;DONG Xiao-wen;WANG Ting-fu Department of Chemistry, School of Science, Shanghai University Shanghai, 200436, China

【机构】 上海大学理学院化学系；

【摘要】 采用α-FeOOH（平均长度为50nm,平均轴比为14）和BaCO₃ 及添加离子经局部规整反应制备针状钡铁氧体。利用XRD、TEM、TG-DTA 表征热处理后粒子的形态结构。结果表明原料中加入1%wt 防烧结剂,经800℃热处理2h后样品组成为单相六角晶系针状BaFe₁₁Co_0.5Ti_0.5O₁₉,平均长度为400nm,平均轴比为8 左右,该样品的矫顽力H_c=151259A/m,比饱和磁化强度σ_?=55.03emu/g。更多还原

【Abstract】 Acicular barium ferrite, which was prepared by topotactic reaction between barium carbonate, aciculargoethite with the aspect ratio of 14 and the average length of 500nm and some doping ions, were characterized byXRD, TEM and TG-DTA. The results show that, by adding 1%wt of anti-sintering agent, the morphology of theproducts calcined at 800℃ for 2h is single phase hexaplanar acicular, and the composition of the samples isBaFe₁₁Co_0.5Ti_0.5O₁₉. The aspect ratio of the particles is 8 and the average length is 400nm. The magnetic properties areas follow: H_c = 151259A/m, σ_s = 55.03 emu/g.更多还原