Details

Autor(en) / Beteiligte

• Ma, Chao
• Zhao, Biao
• Dai, Qiaofei
• Fan, Bingbing
• Shao, Gang
• Zhang, Rui

Titel

Porous structure to improve microwave absorption properties of lamellar ZnO

Ist Teil von

• Advanced powder technology : the international journal of the Society of Powder Technology, Japan, 2017-02, Vol.28 (2), p.438-442

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• The porous lamellar ZnO nanostructures present the enhanced microwave absorption properties. [Display omitted] •The novel porous lamellar ZnO was prepared by a facile two-step method.•The novel porous lamellar ZnO exhibits enhanced microwave absorption properties.•The minimum reflection loss of porous lamellar ZnO is −34.5dB at 10.7GHz.•The good properties were mainly attributed to multi-reflection of porous structure. The novel porous ZnO nanoflakes were fabricated by a facile two-step method containing preparation of precursor ZnCO3 and subsequently calcination of ZnCO3. The as-prepared products were analyzed by X-ray diffraction, scanning electron microscopy, and thermalgravimetric analysis. The results reveal that the porous ZnO nanoflakes were in the diameter and thickness of several to tens micrometers and 100–500nm, respectively. The microwave absorption properties of porous ZnO nanoflakes were investigated by the network analyzer, which exhibit the minimal reflection loss of −34.5dB at 10.7GHz with only thickness of 1.5mm. The effective absorption (below −10dB) bandwidth can be tuned between 7.0GHz and 17.1GHz by tuning absorber thickness of 1.0–2.2mm. Thus, the porous lamellar ZnO could be used as a promising absorbing material with the features of high efficiency absorption, wide-band and light weight.