Preparation and Stabilization of High Conductivity Zn-Coated Tetra-Needle-Like ZnO Whiskers

Zhi Mei Xia; Cui Feng Wan; Sheng Ming Jin; Mo Tang Tang

doi:10.4028/www.scientific.net/AMR.197-198.362

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Preparation and Stabilization of High Conductivity Zn-Coated Tetra-Needle-Like ZnO Whiskers
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 197-198Preparation and Stabilization of High Conductivity...

Preparation and Stabilization of High Conductivity Zn-Coated Tetra-Needle-Like ZnO Whiskers

Abstract:

Tetra-needle-like zinc oxide whiskers (T-ZnOW) were coated with Zn and stabilized with Al₂O₃ consequently. Coating conditions for preparation of low resistivity T-ZnOW were investigated. The Zn-coated T-ZnOW was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrical resistance measurement. The SEM and XRD results indicated that the tetra-needle-like structure of ZnO whiskers could be well maintained after coating with Zn and stabilizing with Al₂O₃. Experiment results showed that the resistivity of T-ZnOW was affected significantly by the annealing temperature, annealing time, coating amount of Zn and original content of Al³⁺. Al³⁺ ions played an important role in stabilizing the resistivity of Zn-coated T-ZnOW. The resistivity of T-ZnOW decreased considerably from 10⁸ to 10¹ Ω•cm when the Zn-coated amount and Al³⁺ original content were 10.0 wt.% and 2.0 at.%, respectively.Introduction.