全文获取类型
收费全文 | 230篇 |
免费 | 5篇 |
国内免费 | 6篇 |
专业分类
电工技术 | 6篇 |
化学工业 | 91篇 |
金属工艺 | 10篇 |
机械仪表 | 2篇 |
建筑科学 | 13篇 |
矿业工程 | 5篇 |
能源动力 | 27篇 |
轻工业 | 35篇 |
水利工程 | 3篇 |
石油天然气 | 5篇 |
无线电 | 4篇 |
一般工业技术 | 37篇 |
冶金工业 | 1篇 |
自动化技术 | 2篇 |
出版年
2023年 | 5篇 |
2022年 | 7篇 |
2021年 | 7篇 |
2020年 | 6篇 |
2019年 | 4篇 |
2018年 | 9篇 |
2017年 | 12篇 |
2016年 | 4篇 |
2015年 | 14篇 |
2014年 | 14篇 |
2013年 | 16篇 |
2012年 | 22篇 |
2011年 | 26篇 |
2010年 | 12篇 |
2009年 | 20篇 |
2008年 | 14篇 |
2007年 | 17篇 |
2006年 | 8篇 |
2005年 | 6篇 |
2004年 | 6篇 |
2003年 | 3篇 |
2002年 | 3篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1994年 | 1篇 |
排序方式: 共有241条查询结果,搜索用时 15 毫秒
241.
《Ceramics International》2022,48(17):24877-24887
Environmentally friendly microwave absorbers with superior electromagnetic wave absorption, lightweight and hydrophobic ability have received considerable attention in practical applications. However, addressing the above-mentioned characteristics is simultaneously a tremendous challenge. Along these lines, in this work, a lightweight and efficient hybrid material was fabricated by employing simple self-assembly of core-shell ZnFe2O4@C nanospheres embedded within longan shell-derived honeycomb-like porous carbon. The results display that the carbon skeleton not only improves the conduction loss, but also promotes the reflection and scattering of EM wave. In addition, the core-shell ZnFe2O4@C microspheres are conducive to enhancing the ability of interface polarization and magnetic loss, and further improving the synergistic effect between the dielectric loss and magnetic loss. Furthermore, the unique structure of the ZnFe2O4@C@BPC endows it excellent hydrophobicity and avoids water vapor contamination in practical applications. Precisely, at a thickness of 3.4 mm, the minimum reflection loss (RL) is up to ?58.6 dB at 12.9 GHz. Notably, the effective absorption bandwidth (EAB) is as wide as 9.1 GHz (8.9–18.0 GHz), covering almost the entire X and Ku bands. Consequently, this outstanding performance renders the ZnFe2O4@C@BPC composite quite attractive for a broad range of applications in lightweight, hydrophobic microwave absorption materials. 相似文献