...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Co nanoparticles supported on cotton-based carbon fibers: A novel broadband microwave absorbent
【24h】

Co nanoparticles supported on cotton-based carbon fibers: A novel broadband microwave absorbent

机译：CO纳米粒子支持棉型碳纤维：一种新型宽带微波吸收剂

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

Aiming at the disadvantages of high cost, complex processes, and low yield of carbon-based microwave absorbing materials. In this study, Co/C fibers were successfully prepared by using low-cost cotton as carbon source. The synthetic route was a flexible two-step approach consisting of immersion and subsequent carbothermal reduction in N-2 atmosphere. By means of controlling the Co(NO3)2 center dot 6H2O concentration and calcination temperature, Co nanoparticles with different loading amount and particle size were uniformly dispersed along the cotton-based carbon fibers. The Co loading amount, calcination temperature, and filling rate on electromagnetic parameters and microwave absorption performance were systematically studied. Among the Co/C fibers obtained at different Co( NO3)2 center dot 6H2O concentration and calcination temperatures, the Co/C fibers synthesized at 600 degrees C with 0.5M Co(NO3)(2)center dot 6H(2)O exhibited the best microwave absorption performance. The reflection loss (RL) values less than -10 dB were obtained in the frequency range of 11.3-18 GHz, which covered the entire Ku-band (from 12 to 18 GHz). Such excellent microwave absorption performance was attributed to the synergistic effect of dielectric loss, magnetic loss, and good impedance matching. Owing to the characteristics of cost-effective synthetic strategy, low density, and good microwave absorption, the Co/C fibers are highly promising as economic and broadband microwave absorbent. (C) 2018 Elsevier B.V. All rights reserved.
机译：旨在瞄准高成本，复杂的过程和低产量的碳基微波吸收材料的缺点。在该研究中，通过使用低成本棉作为碳源成功制备了CO / C纤维。合成途径是一种柔性的两步方法，包括浸渍和随后的N-2气氛中的碳热还原。通过控制CO（NO3）2中心点6H2O浓度和煅烧温度，沿着棉基碳纤维均匀地分散具有不同负载量和粒度的CO纳米颗粒。系统地研究了电磁参数和微波吸收性能的CO加载量，煅烧温度和填充率。在不同CO（NO3）2中央点6H2O浓度和煅烧温度下获得的CO / C纤维中，在600℃下合成的CO / C纤维在0.5M CO（2）中心点6H（2）O展示最好的微波吸收性能。在11.3-18GHz的频率范围内获得小于-10dB的反射损耗（RL）值，其覆盖整个KU波段（从12到18 GHz）。这种优异的微波吸收性能归因于介电损耗，磁力损失和良好阻抗匹配的协同效应。由于具有成本效益的合成策略，低密度和良好的微波吸收的特点，CO / C纤维具有高度前途，作为经济和宽带微波吸收剂。 （c）2018年elestvier b.v.保留所有权利。

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