A Study of Morphogies and Growth Mechanism of Zinc Oxide Growth on Zinc Metal Substrate Prepared by Electric-Spark Method

• Main Authors: CHUANG-I-HSUAN, 莊逸宣
• Other Authors: YANG,YAO-SHENG
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/ant8e9

碩士 === 高苑科技大學 === 電子工程研究所 === 107 === There are many methods for preparing nano zinc oxide, which can be generally classified into chemical methods, physical methods, and chemical physical methods. The chemical method includes: chemical precipitation method, micro-emulsification method, sol-gel method, hydrothermal synthesis method, etc.; physical method includes: evaporation condensation method, mechanical ball milling method, etc.; chemical physical method includes: spray pyrolysis method, oxidation hot explosion Decomposition method, etc. In this study, an electric spark was used to generate a high-voltage discharge. The discharge voltage was about 1.5 kV to bombard the metal zinc substrate, and the nano zinc oxide was prepared to grow on a metal zinc substrate. The metal zinc substrate was placed in a dry atmosphere, water humidity 85%, salt concentration 5% seawater humidity 85%, high voltage discharge time was 1, 2, 3, 12 and 24 hours, respectively, to observe the nano zinc oxide Growing in the form of a metal zinc substrate. The experimental results obtained show that the nano zinc oxide has a sheet-like structure, and the size of the nano zinc oxide increases as the high voltage discharge time increases. The nano zinc oxide growth mechanism belongs to a solid phase converted into a gas phase, and is transformed from a gas phase to a solid phase deposition, that is, the metal zinc is rapidly bombarded by a high voltage discharge, and the solid phase metal zinc is instantaneously converted into a vapor phase metal zinc at a high temperature. Then, after high temperature oxidation, solid phase zinc oxide is deposited and grown on the metal zinc substrate.