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OALib Journal期刊
ISSN: 2333-9721
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用机械合金化方法制备纳米晶ni--zn铁氧体
Keywords: 无机非金属材料,ni-zn铁氧体,纳米晶,机械合
Abstract:
？用机械合金化方法球磨金属氧化物,通过机械化学反应合成了ni--zn铁氧体.xrd,dsc,tg等分析发现,在600℃空气中退火后样品完全转变成单相的尖晶石结构.球磨后粉末样品的平均颗粒尺寸为15$\sim$32nm,在不同温度退火后晶粒有所长大.在空气中低于1000℃的温度下退火后的样品具有较高的比饱和磁化强度,最高$\sigma_{\rms}$=63.4emu$\cdot$g$^{-1}$,可与块状样品相比.也讨论了真空退火对样品磁性的影响,800℃真空退火后样品的分子磁矩计算值为3.4$\sim$3.7$\mu_{\rmb}$.
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