کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1258968 | 971652 | 2015 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mechanism and kinetics of the BaMgAl10O17:Eu2+ alkaline fusion reaction Mechanism and kinetics of the BaMgAl10O17:Eu2+ alkaline fusion reaction](/preview/png/1258968.png)
Knowledge of the kinetics and mechanism of BaMgAl10O17:Eu2+ (BAM) fusion with sodium hydroxide will benefit recycling rare earth elements (REEs) from the waste phosphors. The reaction temperature range of 290–375 °C and the reaction mechanism were determined using X-ray diffraction, scanning electron microscopy and differential scanning calorimetry. Activation energy was determined by the four model-free methods, and calculated results showed that the Kissinger method value of 579.5 KJ/mol was close to the average value of the Kissinger-Akahira-Sunose (KAS) and the Flynn-Wall-Ozawa (FWO) methods of 563.5 kJ/mol. The calculated activation energy variation tendency versus conversion factor agreed with the proposed mechanism.
Activation energy changes of BaMgAl10O17:Eu2+ alkaline fusion reaction with the conversion factor obtained by the KAS, FWO and Friedman methodsFigure optionsDownload as PowerPoint slide
Journal: Journal of Rare Earths - Volume 33, Issue 6, June 2015, Pages 664–670