常压水热法制备纳米多界面结构氧化锌及其电磁波损耗特性
首发时间:2010-01-11
摘要:采用常压水热法制备了具有系列多界面结构的氧化锌,并对样品的晶体结构、微观形貌和电磁波损耗特性做了研究。通过扫描电子显微镜(SEM)研究了不同反应条件对氧化锌纳米结构形貌的影响,发现改变锌盐种类和氢氧化钠浓度能够得到不同形貌的氧化锌纳米多界面结构;动力学研究结果表明,不同锌盐制备氧化锌的成核速率几乎相等,晶体生长阶段的速率却存在明显的差异,由此提出基于极性晶面阴离子吸附的纳米氧化锌低维结构生长机理。电磁波损耗特性的初步研究结果表明,纳米界面结构的形貌对其电磁波损耗性能有显著影响。
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Electromagnetic Loss Properties and Preparation of ZnO with Different Nanostructures and Multi-interfaces by Hydrothermal Method under Atmospheric Pressure
Abstract:Zinc oxide as a typical semiconductor with adjustable conductivities can grow into different micro/nano-structures. In this paper, several types of nanostructures with multi-interfaces of zinc oxide have been prepared through hydrothermal method under atmospheric pressure, and the scanning electron microscopy (SEM) was used to observe the morphologies of the samples. It was found that different nanostructures with multi-interface could be obtained by changing the sort of zinc salts. Kinetic studies showed that the nucleation rates for different kind of zinc salts were almost equivalent, the obvious disparities of the ratios for growth stages might be ascribed to the radius and hydratability, which was speculated to the main reason why the as-prepared zinc oxides exhibit different morphologies. The electromagnetic properties of multi-interfacial structure was investigated, and the consequences indicated that interfacial behaviors exibited distinct effect on the intensity and frequency of reflectivity of electromagnetic wave.
Keywords: Nanostructures with multi-interfaces Zinc oxide hydrothermal method under atmospheric pressurelow Electromagnetic Loss Properties
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常压水热法制备纳米多界面结构氧化锌及其电磁波损耗特性
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