Sunshine Factory, Co., Ltd. > Applications > ZrP for PolymerZrP for Polymer
Study on the Preparation and Non-Isothermal Kinetics of Thermal Decompostion of α-Zirconium Phosphate
Crystalline sample of α-Zr(HPO4) 2-H2O (α-ZrP) has been prepared by a modified method involving complexion of zirconium with fluoride ions in a glass vessel, followed by reaction with phosphoric acid at room temperature.
The product is highly crystalline with an interlayer spacing of 0.765 nm. The kinetic behavior and process of thermal decomposition of α-zirconium phosphate has been studied by thermogravimetry at linearly increasing temperature. It is illustrated that the crystal water is dehydrated and anhydrous zirconium phosphate is formed at below 453°c. Anhydrous zirconium phosphate is decomposed into ZrP2O7 completely at 720°c. The weight losses of dehydration and decomposition were 6.24% and 5.64% respectively, which conformed with theoretical values. The decomposition reaction of anhydrous zirconium phosphate is controlled by Avrami-Erofeev random nucleation and subsequent growth mechanism (A1). Accordingly, kinetic equation can be deduced as (dα)/(dt)=3.50×107.e-165.6×103/RT.(1-α). These results are in good agreement with experiment results.
The product is highly crystalline with an interlayer spacing of 0.765 nm. The kinetic behavior and process of thermal decomposition of α-zirconium phosphate has been studied by thermogravimetry at linearly increasing temperature. It is illustrated that the crystal water is dehydrated and anhydrous zirconium phosphate is formed at below 453°c. Anhydrous zirconium phosphate is decomposed into ZrP2O7 completely at 720°c. The weight losses of dehydration and decomposition were 6.24% and 5.64% respectively, which conformed with theoretical values. The decomposition reaction of anhydrous zirconium phosphate is controlled by Avrami-Erofeev random nucleation and subsequent growth mechanism (A1). Accordingly, kinetic equation can be deduced as (dα)/(dt)=3.50×107.e-165.6×103/RT.(1-α). These results are in good agreement with experiment results.
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