| 碱式碳酸钴非等温热分解动力学 |
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| 引用本文： | 刘秉国,彭金辉,张利波,张泽彪,郭胜惠,张世敏. 碱式碳酸钴非等温热分解动力学[J]. 中南大学学报(自然科学版), 2011, 42(2) |
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| 作者姓名： | 刘秉国 彭金辉 张利波 张泽彪 郭胜惠 张世敏 |
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| 作者单位： | 昆明理工大学材料与冶金工程学院,云南昆明,650093;昆明理工大学非常规冶金省部共建教育部重点实验室,云南昆明,650093 |
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| 基金项目： | 国家自然科学基金重点资助项目，云南省科技计划项目，昆明理工大学分析测试基金资助项目 |
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| 摘 要： | 利用热重分析及X线衍射技术,考察不同升温速率下碱式碳酸钴的热分解特性,研究碱式碳酸钴热分解动力学.用模型函数法(Coats-Redfern和Achar法)和非模型法(Kissinger法和Flynn-Wall-Ozawa法)分析计算热分解过程第2阶段的动力学参数.研究结果表明:在空气气氛下,碱式碳酸钴的热分解过程分2个阶段进行(碱式碳酸钻在303 K左右开始失去结晶水:493 K时无水盐分解,至625 K以上基本分解完毕,产物为四氧化三钴),其中分解过程质量损失率为29.5%,与理论值相符:产物表观活化能E为106.139～144.537 kJ/mol,lgA(A为指前因子)为9.396～11.868,机理函数为成核与长大模型.
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| 关 键 词： | 碱式碳酸钴 热分解 非等温动力学 |
Non-isothermal kinetics of thermal decomposition of basic cobalt carbonate |
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| LIU Bing-guo,PENG Jin-hui,ZHANG Li-bo,ZHANG Ze-biao,GUO Sheng-hui,ZHANG Shi-min. Non-isothermal kinetics of thermal decomposition of basic cobalt carbonate[J]. Journal of Central South University:Science and Technology, 2011, 42(2) |
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| Authors: | LIU Bing-guo PENG Jin-hui ZHANG Li-bo ZHANG Ze-biao GUO Sheng-hui ZHANG Shi-min |
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| Affiliation: | LIU Bing-guo1,2,PENG Jin-hui1,ZHANG Li-bo1,ZHANG Ze-biao1,GUO Sheng-hui1,ZHANG Shi-min1,2 (1.Faculty of Materials and Metallurgical Engineering,Kunming University of Science and Technology,Kunming 650093,China,2.Key Laboratory of Unconventional Metallurgy,Ministry of Education,University of Science and Technology,China) |
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| Abstract: | Kinetics and thermal decomposition behavior of basic cobalt carbonate was investigated using TG and XRD at various heating rates.Kinetic parameters of decomposition of basic cobalt carbonate for the second-stage was calculated and analyzed using model-fitting(Coats-Redfern method and Achar method) and model-free(Kissinger method and Flynn-Wall-Ozawa method).The results show that the decomposition process of basic cobalt carbonate is divided into two stages: the crystallization water begins to dehydrate at 3... |
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| Keywords: | basic cobalt carbonate thermal decomposition non-isothermal kinetics |
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