私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯系方式
  • 通信地址:陜西省西安市友誼西路127號
  • 郵編:710072
  • 電話:029-88431638
  • 傳真:
  • Email:nwpugjw@163.com
當前位置:> 首頁 > 論文著作 > 正文
[Ceramics International] In-situ pyrolyzed polymethylsilsesquioxane multi-walled carbon nanotubes derived ceramic nanocomposites for electromagnetic wave absorption
作者:Lixin Chen, Jia Zhao, Lei Wang, Fei Peng, Hu Liu, Jiaoxia Zhang, Junwei Gu* and Zhanhu Guo*
關鍵字:Iron acetylacetonate, polymethylsilsesquioxane
論文來源:期刊
具體來源:Ceramics International
發表時間:2019年
Iron acetylacetonate (Fe(acac)3) modified polymethylsilsesquioxane (PMS), simplified as PMS(Fe), was firstly obtained from PMS and Fe(acac)3 via the condensation reaction. Multi-walled carbon nanotubes (MWCNTs) were then introduced to fabricate the corresponding MWCNTs/SiC nanocrystals/amorphous SiOC ceramic composites via pyrolyzed process. Owing to the catalytic effect of iron and heterogeneous nucleation promoted by MWCNTs, SiC nanocrystals were separated from SiOC amorphous ceramic matrix under 1400°C. When the mass fraction of MWCNTs was 9 wt%, the obtained MWCNTs/SiC nanocrystals/amorphous SiOC ceramic composite (C9) demonstrated high microwave-absorbing properties. The minimum reflection loss (RLmin) and effective absorption bandwidth (EBA) of the obtained C9 at X-band (8.2–12.4) reached ?61.8 dB and 2.6 GHz (a thickness of 2.19 mm), respectively. Compared with other polymer-derived ceramics (PDCs), the RLmin was higher and the required thickness was thinner. This excellent microwave-absorbing property was due to the interfacial polarization relaxation generated between nanocrystals (MWCNTs & SiC) and amorphous SiOC, and the formed complete conductive networks inside the ceramic composites.
主站蜘蛛池模板: 奈曼旗| 桐城市| 茌平县| 海原县| 北宁市| 弥渡县| 万载县| 岳阳县| 呼图壁县| 子洲县| 稷山县| 开封县| 富顺县| 大埔区| 道孚县| 宜兰县| 丹东市| 准格尔旗| 石门县| 红安县| 赫章县| 石嘴山市| 长阳| 新闻| 库车县| 马边| 扶沟县| 昌邑市| 抚松县| 芮城县| 南充市| 济宁市| 赞皇县| 边坝县| 诸暨市| 塔城市| 成都市| 焦作市| 基隆市| 左云县| 遵义县|