Size controllable synthesis of cobalt-doped nickel oxide and their superior microwave dielectric response ability
| Autor: | Xiaohai Ding, Cong Chen, Wen Chen, Haitao Dong, Bing Zong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science business.industry Nickel oxide Non-blocking I/O Oxide chemistry.chemical_element Dielectric Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry 0103 physical sciences Optoelectronics Dielectric loss Electrical and Electronic Engineering Absorption (electromagnetic radiation) business Cobalt Microwave |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 31:20285-20294 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-020-04548-4 |
| Popis: | Low cost, stability, easy to produce, and strong dielectric loss ability materials are urgently required to manage increasingly serious electromagnetic pollution and radiation. Tradition metal oxides are considered promising alternatives; however, the ultralow dielectric behavior has greatly limited their EM absorption abilities. To strengthen the dielectric ability, herein, taking commonly NiO as a case, two synergistic strategies including element doing (here is Co) and size-tuning have been employed to step-by-step boost the dielectric loss ability. The mechanism for tuning the sizes of Co-dotted NiO can be easily realized by linearly changing the surfactant (PVP). Consequently, the precursor salts could disperse well and lead to a smaller size for the ultimately sample. The dielectric loss ability of the Co-dotted NiO with optimized size (tuning from 20 to 300 nm) has exhibited remarkable increase in dielectric loss ability, as compared to original NiO. After investigating the EM absorbing performance, the maximum effective absorption region of Co-dotted NiO reaches 3.8 GHz, showing wideband absorption ability. Therefore, utilization of size-tuning and element-doping strategy have been an effective strategy to increase the EM absorption ability of transition metal oxide. |
| Databáze: | OpenAIRE |
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