武汉工程大学学报2017，Vol.39Issue(2)：134-140,7.DOI:10.3969/j.issn.1674-2869.2017.02.006
碱式碳酸锆的热分解非等温动力学及机理研究
Non-isothermal Kinetics and Mechanism of Thermal Decomposition of Basic Zirconium Carbonate
摘要
Abstract
The thermal decomposition and non-isothermal kinetic evaluation of basic zirconium carbonate were studied in air by using simultaneous thermal analyzer,and the kinetics parameters were calculated by solid-phase reaction and thermal gravity-differential thermal gravity techniques at thermal decomposition of heating rates of 10 ℃/min,20 ℃/min and 30 ℃/min.The most probable mechanism functions were deduced by Kissinger-Akah-Sunose equation,Flynn-Wall-Ozawa equation and the least square method.The results show that the decomposition process of basic zirconium carbonate is divided into four stages.The value of the activation energy in phase I,II and III is 94.963 kJ/mol,309.781 kJ/mol and 362.591 kJ/mol,respectively,and the corresponding pre-exponential factor is 27.40-27.864 1,57.730 4-58.873 6 and 53.268 8-55.034 6.The most probable decomposition mechanism in phase I,II and III obeys the assumed random nucleation,the assumed random nucleation and the chemical reaction mechanism,respectively.The study provides a theoretical basis for the preparation of zirconia,ammonium zirconium carbonate,potassium zirconium carbonate by thermal decomposition using basic zirconium carbonate as raw materials.关键词
碱式碳酸锆/热分解/非等温动力学/机理/纳米氧化锆Key words
basic zirconium (IV) carbonate/thermal decomposition/non-isothermal kinetics/mechanism/nanometer zirconia分类
化学化工引用本文复制引用
袁惠,栗海峰,任叶刚..碱式碳酸锆的热分解非等温动力学及机理研究[J].武汉工程大学学报,2017,39(2):134-140,7.基金项目
纳米矿物材料及应用教育部工程研究中心基金(CUGNGM20135) （CUGNGM20135）
