Characterization of mechanothermally processed nanostructured ZnO
来源期刊：International Journal of Minerals Metallurgy and Materials2016年第5期
论文作者：Saeed Karimi Abolghasem Ataie
文章页码：588 - 594
摘 要：In this paper, the Taguchi method with an L9（34） orthogonal array was used as experimental design to determine the optimum conditions for preparing Zn O nanoparticles via a mechanothermal route. ZnSO4·H2O and Na2CO3 were used as starting materials. The effects of milling time, Na2CO3/ZnSO4·H2O molar ratio, and ball-to-powder mass ratio（BPR） on the bandgap（Eg） of ZnO nanoparticles were investigated. The ranges of the investigated experimental conditions were 5–15 h for the milling time（t）, 1.0–1.2 for the Na2CO3/ZnSO4·H2O molar ratio（M）, and 10–30 for BPR. The milling time and BPR exhibited significant effects; an increase in milling time reduced the bandgap. The optimum conditions from this study were t3 = 15 h, M1 = 1, and BPR2 = 20. Only two significant factors（t3, 15 h; BPR2, 20） were used to estimate the performance at the optimum conditions. The calculated bandgap was 3.12 e V, in reasonable agreement with the experimental results obtained under the optimized conditions.
Saeed Karimi，Abolghasem Ataie
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran
摘 要：In this paper, the Taguchi method with an L9（34） orthogonal array was used as experimental design to determine the optimum conditions for preparing Zn O nanoparticles via a mechanothermal route. ZnSO4·H2O and Na2CO3 were used as starting materials. The effects of milling time, Na2CO3/ZnSO4·H2O molar ratio, and ball-to-powder mass ratio（BPR） on the bandgap（Eg） of ZnO nanoparticles were investigated. The ranges of the investigated experimental conditions were 5–15 h for the milling time（t）, 1.0–1.2 for the Na2CO3/ZnSO4·H2O molar ratio（M）, and 10–30 for BPR. The milling time and BPR exhibited significant effects; an increase in milling time reduced the bandgap. The optimum conditions from this study were t3 = 15 h, M1 = 1, and BPR2 = 20. Only two significant factors（t3, 15 h; BPR2, 20） were used to estimate the performance at the optimum conditions. The calculated bandgap was 3.12 e V, in reasonable agreement with the experimental results obtained under the optimized conditions.
关键词：
