MnO2对镍铁尖晶石烧结行为及磁性的影响-JournalofNortheastern.PDF

第32卷第10期 东 北 大 学 学 报 ( 自 然 科 学 版 ) Vol.32,No. 10 2011 年 10 月 Journal of Northeastern niversity( Natural Science) Oct. 2 0 1 1 MnO 2 杜金晶, 刘宜汉, 姚广春, 张 啸 ( , 110819) : MnO NiFe O . X 2 2 4 ,. 2+ 3+ ,MnO ,Mn Mn ,Mn NiFe O 2 2 4 ,, . ,MnO , 1% MnO 2 2 59C .1% MnO , ( M ) (H ) 2 s c 15673 emu/g 48316 Oe . : ;; ; ; : TF 125.4 : A : 1005-3026(2011) 10-1452-04 Effect of MnO2 Addition on Sintering Behavior and Magnetic Property of Nickel Ferrite Spinel D UJ in-j ing , L I U Yi-han, YA O Guang-chun, ZH A N G X iao ( School of Materials Metallurgy, Northeastern niversity, Shenyang 110819, China. Corresponding author: D Jin-jing, E-mail: dujinzi521 @ 126. com) Abstract: NiFe O spinelsamples with different mass fractions of MnO were synthesized by two- 2 4 2 step solid phase sintering process. The morphology and phase transformation were examined by scanning electron microscopy, X-ray diffraction and DTA analysis, respectively. The sintering behavior and magnetic property were investigated by thermal expansion instrument and vibrating sample magnetometer, respectively. The results showed that MnO decomposes into MnO and 2 Mn2O3, the crystalline structure of the ceramic matrix is stillof NiFe2O4 spinel and no other new phases appear