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Citation: ZHAI Ran, WANG Hao, ZHU Man-Kang, YAN Hui. Kinetics of CaWO₄ Thin Films Prepared by Chemical Bath Deposition[J]. Chinese Journal of Applied Chemistry, ;2007, 24(12): 1405-1408. shu

Kinetics of CaWO₄ Thin Films Prepared by Chemical Bath Deposition

1.
The College of Materials Science and Engineering, Beifing University of Technology, Beijing 100022

Corresponding author: WANG Hao,
Received Date: 30 December 2006
Available Online: 30 April 2007
Fund Project: 北京市教委科技发展计划(KM200710005029)资助项目 (KM200710005029)

Kinetic studies were carried out on the CaWO₄ thin films prepared by the chemical bath deposition(CBD).Kinetic data based on Avrami-Erofeev equation were founded at different deposing temperatures(40~80℃) and pH values(8~12).It indicated that the experimental temperature and the pH value of solution could significantly affect the reaction velocity constant k.With the temperature rising,the reaction rate constant k increased,and the film growth was prone to spontaneous nucleation.Meanwhile,the higher the solution pH value was,the slower the film growed.The pH value controls the reaction process by influencing the stability of complex Ca-EDTA.From these kinetic studies we can clarify the dependence of the growth of thin films on experimental parameters,providing a theoretical view to control the process of the deposition.
- chemical bath deposition,
- CaWO₄,
- thin film,
- Kinetic
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Kinetics of CaWO₄ Thin Films Prepared by Chemical Bath Deposition