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Citation: ZHAO Haigang, LI Caihong, WANG Hongqiang, LI Ru, ZHANG Guanghui. Effects of Calcination Temperature on Crystallization and Optical Properties of ZnO Powder[J]. Chinese Journal of Applied Chemistry, ;2014, 31(2): 188-192. doi: 10.3724/SP.J.1095.2014.30055 shu

Effects of Calcination Temperature on Crystallization and Optical Properties of ZnO Powder

1.
College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Corresponding author: LI Caihong,
Received Date: 21 January 2013
Available Online: 4 June 2013

ZnO powder was obtained by conventional precipitation method using ammonium oxalate and zinc acetate as raw materials.The effects of calcination temperature on the crystallization and fluorescent properties of the product were investigated.The powders were characterized and analyzed by TGA-DTA,XRD,UV-Vis,FS and SEM,respectively.The results show that the precursor is C₂O₄Zn·2H₂O and its minimum calcination temperature is 400℃.With the increase of the calcination temperature,the crystallinity of the product is enhanced and the primary particle size tends to grow.The powder is consisted of 200 nm lamellar particles and has a strong ultraviolet luminescence peak after 600℃ calcination.When the calcination temperature was increased to 900℃,the product became highly agglomerated with particle size larger than 500 nm.In addition,the ZnO powder shows a strong ultraviolet absorption with a blue shift of absorption peak.
- zinc oxide,
- calcination temperature,
- optical properties
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