LaNi_(4.25)Al_(0.75)D_(x)解析过程的热力学与动力学研究  

The Thermodynamic and Kinetic Study of LaNi_(4.25)Al_(0.75)D_(x)Resolution Process

作　　者：周文 李松[1] 吴展华[1] 杨小军 姚春艳 杨立 康海涛 Zhou Wen;Li Song;Wu Zhanhua;Yang Xiaojun;Yao Chunyan;Yang Li;Kang Haitao(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《山东化工》2023年第10期22-26,29,共6页Shandong Chemical Industry

摘　　要：研究了LaNi_(4.25)Al_(0.75)D_(x)解析过程的P-C-T特性。在C值为1,2,3时,其焓变分别为43.272,44.834,45.772 kJ/mol;其熵变分别为113.596,118.415,124.701 J/(mol·K)。利用JMA、Jander和Chou等动力学模型研究LaNi_(4.25)Al_(0.75)D_(x)的解析过程,获得LaNi_(4.25)Al_(0.75)D_(x)解析过程的动力学参数。Chou模型拟合结果表明扩散步骤是LaNi_(4.25)Al_(0.75)D_(x)解析过程的控速步骤。通过JMA模型、Jander模型与Chou模型分别获得LaNi_(4.25)Al_(0.75)D_(x)解析反应的活化能为32.497,28.317,37.480 kJ/mol。In this paper,the P-C-T characteristics of LaNi_(4.25)Al_(0.75)D_(x)resolution process are studied.When C is 1,2 and 3,the enthalpy changes are 43.272,44.834,45.772 kJ/mol respectively;The entropy changes are 113.596 J/(mol·K)、118.415 J/(mol·K)and 124.701 J/(mol·K),respectively.The resolution process of LaNi_(4.25)Al_(0.75)D_(x)was studied by using JMA,Jander and Chou kinetic models,and the kinetic parameters of LaNi_(4.25)Al_(0.75)D_(x)were obtained.The fitting results of Chou model show that the diffusion step is the speed control step of LaNi_(4.25)Al_(0.75)D_(x)resolution process.The activation energies of LaNi_(4.25)Al_(0.75)D_(x)resolution reaction were 32.497,28.317 kJ/mol and 37.480 kJ/mol,respectively,obtained by JMA model,Jander model and Chou model.

关 键 词：热力学 JMA模型 Jander模型 Chou模型 活化能 P-C-T LaNi_(4.25)Al_(0.75)D_(x) 

分 类 号：TG146.45[一般工业技术—材料科学与工程]