全文获取类型
收费全文 | 139篇 |
免费 | 3篇 |
国内免费 | 9篇 |
专业分类
电工技术 | 4篇 |
综合类 | 6篇 |
化学工业 | 43篇 |
金属工艺 | 9篇 |
机械仪表 | 6篇 |
建筑科学 | 3篇 |
矿业工程 | 3篇 |
能源动力 | 5篇 |
轻工业 | 2篇 |
无线电 | 14篇 |
一般工业技术 | 34篇 |
冶金工业 | 2篇 |
自动化技术 | 20篇 |
出版年
2022年 | 3篇 |
2021年 | 5篇 |
2020年 | 3篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 4篇 |
2014年 | 6篇 |
2013年 | 10篇 |
2012年 | 13篇 |
2011年 | 22篇 |
2010年 | 17篇 |
2009年 | 13篇 |
2008年 | 3篇 |
2007年 | 9篇 |
2006年 | 6篇 |
2005年 | 6篇 |
2004年 | 12篇 |
2003年 | 4篇 |
2002年 | 2篇 |
2001年 | 2篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1997年 | 1篇 |
排序方式: 共有151条查询结果,搜索用时 31 毫秒
151.
《Ceramics International》2020,46(7):9011-9015
In this paper, the antimony doped tin oxide (ATO) and reduced graphene oxide (rGO) were prepared by coprecipitation method and modified Hummers’ method, respectively. Both were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and vector network analyzer (VNA). The as-prepared rGO showed typical sheets-like structure and the as-prepared ATO showed typical nano-particle shape. Then, the ATO and rGO multilayer films were designed and the microwave absorption performances were numerically evaluated using finite element methods. The results showed that synergetic effects of interfacial polarization resonance and 1/4λ elimination were stimulated in 10-layerd 1.8 mm multilayer films to give a minimal reflection loss of −45.2 dB @ 16.1 GHz, and −10 dB bandwidth of 5.4 GHz, which was enhanced more than −30 dB in ATO or rGO monophase absorbers with the same thickness. This work provides a novel technical route to realize high-performance microwave absorbers in terms of simultaneously stronger absorption, broader absorption bandwidth and smaller thickness to facilitate higher flexibility and stability for practical applications. 相似文献