A facile fabrication and high-performance electromagnetic microwave absorption of ZnO nanoparticles

被引：54

作者：

Cai, Mei ^{[1
]}

Shui, Anze ^{[1
]}

Wang, Xuan ^{[1
]}

He, Chao ^{[1
]}

Qian, Junjie ^{[1
]}

Du, Bin ^{[1
]}

机构：

[1] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 842卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Electromagnetic microwave absorption materials; ZnO nanoparticles; Sonochemical method; Oxygen-vacancy defects; WAVE ABSORPTION; BROAD-BAND; PERMITTIVITY; MECHANISM; GROWTH;

D O I：

10.1016/j.jallcom.2020.155638

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electromagnetic microwave absorption materials are highly desired in electronics application in recent years. Herein, ZnO nanoparticles were successfully fabricated via sonochemical process using zinc acetate dihydrate (Zn(CH3COO)(2)center dot 2H(2)O) and ammonia water as raw materials. The as-prepared ZnO nanoparticles annealed at 120 degrees C for 8 h had significantly enhanced electromagnetic microwave absorption properties. This could be attributed to dielectric loss originating from interface polarization, and dipole polarization due to oxygen vacancy defects. The minimum reflection coefficient reached -37.7 dB at 8.96 GHz with a small thickness of 2.1 mm. This work provides a new idea of preparing electromagnetic microwave absorption materials (MAMs) with strong absorbing properties. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：7

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