Preparation and Stabilization of High Conductivity Zn-Coated Tetra-Needle-Like ZnO Whiskers
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.
Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng
Z. M. Xia et al., "Preparation and Stabilization of High Conductivity Zn-Coated Tetra-Needle-Like ZnO Whiskers", Advanced Materials Research, Vols. 197-198, pp. 362-366, 2011