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熔鹽法制備單相Co2W六角鐵氧體及電磁性能研究
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Synthesis and Properties of Co2W Hexaferrites Prepared by Molten Salt Method
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    摘要:

    采用熔鹽法制備單相BaCo2Fe16O27(Co2W)六角鐵氧體，探討燒結(jié)溫度、保溫時(shí)間及熔鹽與反應(yīng)物質(zhì)量比(R)對(duì)產(chǎn)物物相的影響，研究了Co2W鐵氧體的靜磁性能及微波吸收性能。結(jié)果表明，單相Co2W合成條件的溫度為1250 ℃，保溫時(shí)間為4 h，熔鹽與反應(yīng)物質(zhì)量比R=3。Co2W鐵氧體比飽和磁化強(qiáng)度、剩余磁化強(qiáng)度和矯頑力分別為60.76 (A·m2)/kg、3.78 (A·m2)/kg和70.7×79.6 A/m。與溶膠-凝膠法相比，熔鹽法制備的Co2W鐵氧體具有更好的吸波性能。利用熔鹽法制備鐵氧體是提高以鐵氧體為吸收劑的復(fù)合材料吸波性能的潛在途徑

    Abstract:

    The Ba-hexaferrite powders, BaCo2Fe16O27(Co2W), were synthesized by the molten salt method using NaCl+KCl mixture. The effects of sintering temperature, holding time and the ratio (R) of molten salt to reactant weight on the product phase were discussed. At the same time, the microwave absorption properties and static magnetic properties of Co2W were investigated. The results showed that the Co2W single phase was successfully fabricated in the condition of R=3, at a calcinations temperature of 1250 ℃ in air for 4 h. The saturation magnetization (Ms), the remanent magnetization (Mr) and the coercitivity (Hc) of the Co2W ferrite are 60.76, 3.78 (A·m2)/kg and 70.7×79.6 A/m, respectively. Compared to sol-gel method, an excellent microwave absorption properties with majorbiggish improvement was obtained for the Co2W ferrite using the molten salt method, which could be a potential way to enhance the properties of the composites filled with hexagonal ferrite powders for electromagnetic applications.

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栗海峰,龔榮洲,范力仁,王 鮮,沈 翔,馮則坤.熔鹽法制備單相Co2W六角鐵氧體及電磁性能研究[J].稀有金屬材料與工程,2009,38(11):2053~2056.[Li Haifeng, Gong Rongzhou, Fan Liren, Wang Xian, Shen Xiang, Feng Zekun. Synthesis and Properties of Co2W Hexaferrites Prepared by Molten Salt Method[J]. Rare Metal Materials and Engineering,2009,38(11):2053~2056.]
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  • 收稿日期:2009-02-27
  • 最后修改日期:2009-06-29
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