Alkaline treatment kinetics of calcium phosphate bypiezoelectric quartz crystal impedance
来源期刊：中南大学学报(英文版)2009年第4期
论文作者：曾丽萍 何德良 许超 罗胜联
文章页码：558 - 563
Key words：hydroxyapatite; calcium phosphate; piezoelectric quartz crystal impedance; alkaline treatment; kinetics
Abstract: Calcium phosphate film was prepared by electrochemical deposition technology. Subsequently, the alkaline treatment process of calcium phosphate film in 0.1 mol/L NaOH solution was monitored on real time by the piezoelectric quartz crystal impedance (PQCI) technique. The variations of morphology and composition for the alkaline treatment products were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) and X-ray diffraction (XRD), respectively. The dynamic variations of calcium phosphate can be characterized by the change of equivalent circuit parameters. The results show that the forming process of hydroxyapatite (HA) is composed of three stages: (1) acidic calcium phosphate dissolution; (2) phase transformation; and (3) HA formation. Furthermore, the correlative kinetic equations and parameters are obtained by fitting the static capacitance (Cs)—time curves.
基金信息：the Major State Basic Research and Development Program of China
