• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Facile synthetic route to nanosized ferrites by using mesoporous silica as a hard template
【24h】

Facile synthetic route to nanosized ferrites by using mesoporous silica as a hard template

机译：使用介孔二氧化硅作为硬模板，轻松合成纳米铁氧体

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Spinel ferrite nanoparticles ( AFe(2)O(4); A = Mn, Ni, Cu, Co) of around 10 - 20 nm have been successfully synthesized via a simple nanocasting route using metal nitrates as precursors and mesoporous silica gel as a hard template. Spinel nanoparticles were formed under a nitrogen atmosphere by the high-temperature decomposition of a mixture of metal nitrates that fill the silica pores. The decomposition reactions occurred in the confined space provided by the mesopores of the silica template. Under these conditions, the silica walls restricted the growth of the oxide particles formed and so nanosized particles were obtained. The incorporation of different cations into the spinel ferrite enabled us to easily modulate the magnetic properties of the nanomaterials prepared by the template method. Depending on the chemical composition and temperature, we were able to obtain samples that display reversible magnetic behaviour ( zero coercivity field) and samples with coercivity values as high as 1.3 T ( 13 000 Oe).
机译：尖晶石型铁氧体纳米颗粒（AFe（2）O（4）; A = Mn，Ni，Cu，Co）大约10-20 nm已通过使用金属硝酸盐作为前体和介孔硅胶作为硬质的简单纳米铸造路线成功合成模板。尖晶石纳米颗粒是在氮气气氛下通过填充二氧化硅孔的金属硝酸盐混合物的高温分解而形成的。分解反应发生在二氧化硅模板的中孔所提供的有限空间中。在这些条件下，二氧化硅壁限制了所形成的氧化物颗粒的生长，因此获得了纳米尺寸的颗粒。尖晶石铁氧体中掺入不同的阳离子使我们能够轻松调节通过模板法制备的纳米材料的磁性能。根据化学成分和温度，我们能够获得显示出可逆磁行为（矫顽力场为零）的样品，以及矫顽力值高达1.3 T（1.3万Oe）的样品。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号