相控制合成高分散(Mg,Ca,Ba)铁酸盐磁性纳米颗粒与磁性表征
Phase controlled synthesis of (Mg, Ca, Ba)-ferrites nanoparticles with high uniformity and excellent magnetism
李嫱 向霞 王仕发 祖小涛 Sean Li 刘伟
作者信息
摘要
通过选择适合的络合剂、糖类以及优化烧结温度制备了高分散的(Mg,Ca, Ba)铁酸盐磁性纳米颗粒。在合成过程中，糖类扮演了防止凝胶在干燥过程中塌缩的角色。络合机理分析表明，在络合结构中，M2+金属离子除了与EDTA阴离子络合外，其活性位还与-OH等水分子络合。与文献报道的通过其它合成路径获得的类似尺寸的铁酸盐磁性纳米颗粒相比，MFe2O4纳米颗粒的磁学性质明显提高。特别地，烧结温度改善了样品的结晶度和提高了它的磁矩比。
Abstract
(Mg, Ca, Ba)-ferrites magnetic nanoparticles were successfully synthesized through modifying the atomic ratio of polysaccharide and chelating agent at an optimal sintering temperature. In the process, the polysaccharide plays an important role in drastically shrinking the precursor during the gel drying process. In the metal-complex structure, except for coordinating with the EDTA anions M2+ interacts with -OH in water molecule. The MFe2O4 magnetic nanoparticles exhibited enhanced the magnetic properties when compared with nano-MFe2O4 of similar particle size synthesized by other synthesis route reported in the literature. In particular, the sintering temperature improves the crystallinity and increases the hysteresis loop squareness ratio of (Mg, Ca, Ba)-ferrite nanoparticles significantly.关键词
无机非金属材料/络合剂/磁性纳米颗粒/烧结温度/磁学性质Key words
inorganic nonmetallic materials/chelating agent/magnetic nanoparticles/sintering temperature/magnetic properties引用本文复制引用
李嫱,向霞,王仕发,祖小涛,Sean Li,刘伟.相控制合成高分散(Mg,Ca,Ba)铁酸盐磁性纳米颗粒与磁性表征[EB/OL].(2015-12-07)[2026-04-03].http://www.paper.edu.cn/releasepaper/content/201512-338.学科分类
材料科学/化学/金属元素无机化合物化学工业
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