本文研究了锰锌铁氧体纳米粉体的烧结过程及晶粒生长规律,采用传统成型工艺和分段烧结方式,研究坯体的致密化和晶粒生长情况.分别采用阿基米德法、扫描电镜(SEM)和X射线衍射仪(XRD)对烧结体的密度、微观结构和相组成进行测试分析.烧结体的磁性能用振动样品磁强计(VSM)来测定.另外,根据[311]衍射峰的半高宽,利用Scherrer公式计算烧结体晶粒的大小.结果表明,在900℃烧结时,烧结体的密度达到了功率锰锌铁氧体材料所需的最佳密度,此时晶粒生长较好,得出900℃为Mn-Zn铁氧体纳米粉体的最佳烧结温度,此时烧结体的密度为4.8245g/cm3.
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