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高分子材料论文翻译求助
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The nanocomposite multilayer film (NCMF) of substituted BaFe12O19 and TiO2 was prepared using sol-gel method. BaFe10.5Al1.5O19,BaFe10.1Al1.9O19 and BaFe11.4Cr0.6O19 with different absorption frequencies were selected to fabricate the multilayer film with TiO2. The morphology, crystalline structure and microwave absorption property of the NCMF were investigated with an atomic force micros- copy, X-ray diffraction and vector network analyses.The results show that the NCMF is uniform without microcracks and it is an ideal microwave attenuation material with a broad frequency range. Its maximum loss efficiency is about –40 dB. The frequency range with the loss above –10 dB is more than 7 GHz. The multilayer film assembles the achievements of each layer film. Moreover, the compounding of ferrites with TiO2 is helpful to absorb more microwave energy. TiO2particles block the growth of ferrite grains and make most of their size within nanometers. TiO2also improves the dielectric loss efficiency of the NCMF. |
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2楼2014-04-09 08:30:16
【答案】应助回帖
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RXMCDM: 金币+1, 多谢应助！ 2014-04-09 15:14:16
wanghaiju: 金币+50, 翻译EPI+1, ★★★★★最佳答案 2014-04-09 22:10:05
RXMCDM: 金币+1, 多谢应助！ 2014-04-09 15:14:16
wanghaiju: 金币+50, 翻译EPI+1, ★★★★★最佳答案 2014-04-09 22:10:05
| 用溶胶——凝胶方法制备BaFe12O19和TiO2替代的纳米复合材料高分子多层膜(NCMF)。选择具有不同吸收频率的BaFe10.5Al1.5O19, BaFe10.1Al1.9O19 和BaFe11.4Cr0.6O19与TiO2制备多层膜。用显微镜、X-射线衍射、矢量网络分析研究NCMF的形态特点、晶体结构和微波吸收性能。结果表明，NCMF均匀一致没有微裂隙，它是一种理想的具有宽范围的频率的微波衰减材料，其最高损失频率大约为–40 dB。损失率为–7 dB以上的频率范围高于7 GHz。多层膜聚集了每一层膜的优势特点。此外，陶铁磁体与TiO2形成的复合物能够帮助吸收更多的微波能量。TiO2颗粒能够阻止陶铁磁体颗粒的生长，并使控制其颗粒大小位于纳米范围内。TiO2能够降低NCMF的介电损耗效率。 |
3楼2014-04-09 15:13:09