烧结温度对氧化物法制备Ni-Zn铁氧体的介电性能影响</a>

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摘要采用氧化物法制备了Ni0.5Zn0.5Fe2O4铁氧体;样品的相组成成分、微结构和介电性能分别采用X射线衍射仪(XRD)、扫描电镜(SEM)、阻抗分析仪进行表征,讨论了经不同温度预烧和烧结后的样品微结构和介电性能。结果表明:950℃和1 000℃预烧的样品有Fe2O3第2相产生,随着烧结温度的升高,微晶尺寸和密度逐渐增大;介电常数呈现先减小后增大的趋势,在1 200℃时有最小值;1 300℃下烧结样品的介电损耗角正切有峰值出现,表现出了异常的介电行为。

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关键词 ： Ni-Zn铁氧体, 预烧温度, 烧结温度, 介电性能

Abstract：Polycrystal ferrite samples of Ni0.5Zn0.5Fe2O4 were prepared by oxide method.The phase structure,microstructure and dielectric properties were analysized by X-ray diffraction method(XRD),scanning electron microscope(SEM) and resistance analysis instrument.The effects of sintering temperature were studied on microstructure and dielectric properties of the samples,respectively.The results indicated that the second phase Fe2O3 appear as presintered at 950 ℃and 1000 ℃,while the grain size and the density increased with the increasing sintered temperature.The dielectric constant decreased at first,and it reached the lowest value at 1 200 ℃,and then increased.The dielectric constant of the sample as sintered at 1300 ℃ has a peak,it is appeared an abnormal phenomenon.

Key words： Ni-Zn ferrite presintering temperature sintering temperature dielectric properties

基金资助:

江西省教育厅科技资助项目(赣教技字[2006]25号)

引用本文:

罗广圣；姜贵文；李建德. 烧结温度对氧化物法制备Ni-Zn铁氧体的介电性能影响[J]. 南昌大学学报（工科版）, 2012, 34(03): 212-.
LUO Guang-sheng1a,JIANG Gui-wen1b,LI Jian-de2. Dielectric Properties of Ni-Zn Ferrites Prepared at Different Sintering Temperature by Oxide Method. , 2012, 34(03): 212-.

链接本文:

http://qks.ncu.edu.cn/Jwk_xbgkb/CN/ 或 http://qks.ncu.edu.cn/Jwk_xbgkb/CN/Y2012/V34/I03/212