کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1643246 1517244 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Facile synthesis of urchin-like ZnO hollow spheres with enhanced electromagnetic wave absorption properties
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Facile synthesis of urchin-like ZnO hollow spheres with enhanced electromagnetic wave absorption properties
چکیده انگلیسی


• Urchin-like ZnO hollow spheres were synthesized by a simple hydrothermal method.
• Microwave absorption properties of urchin-like ZnO hollow spheres were investigated.
• The ZnO calcined at 500 °C exhibited dual peaks with increasing thickness.
• The ZnO calcined at 500 °C exhibited better absorption properties than others.

Urchin-like ZnO hollow spheres were synthesized by a simple hydrothermal method and their electromagnetic and microwave absorbing properties were investigated. The enlarged SEM image shows that as-prepared ZnO precursor is composed of randomly close-packed porous nanosheets. On the contrary, well-crystallized ZnO spheres are obtained after calcination. The TEM images provide further insight into the detailed structure, showing the typically urchin-like and hollow morphology of ZnO calcined at 500 °C. The SAED pattern clearly demonstrates the single-crystalline feature of urchin-like ZnO hollow spheres. It can be found that the urchin-like ZnO calcined at 500 °C exhibit relatively higher EM wave absorption properties than others. The maximum RL is up to −20 dB at 14.3 GHz and the EM wave absorption shows dual peaks with increasing thickness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 144, 1 April 2015, Pages 157–160
نویسندگان
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