文献类型：期刊文献

英文题名：Thermal dehydration kinetics of SrB6O10.5H2O with different morphologies

作者：Quan, ZhiLin Wu, Shiming Feng, Xiaoqin Zhang, Hongyan Zheng, Jia Huang, Hongsheng

第一作者：Quan, ZhiLin

通信作者：Huang, HS[1]|[144406c0812405d42e8a8]黄宏升;

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Key Lab Energy Chem Guizhou Univ, Guiyang 550003, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2023

卷号：144

外文期刊名：SOLID STATE SCIENCES

收录：;EI(收录号：20233714700241);Scopus(收录号：2-s2.0-85169978457);WOS:【SCI-EXPANDED(收录号:WOS:001072534000001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (No. 21963006) , key laboratory of energy chemistry in guizhou universities (Qian Jiao Ji [2022] 035) and high level talent scientific research startup project of Guizhou Institute of Technology (XJGC20190614) .

语种：英文

外文关键词：Strontium borate; Morphology; Thermal dehydration kinetics; Mechanism function; Activation energy

摘要：The globular-like, sheet-like, coral-like SrB6O10.5H2O was prepared by hydrothermal method, and characterized by X-ray powder diffractometer(XRD), thermogravimetry(TG), differential thermal analysis(DTA), scanning electron microscopy(SEM). The activation energy of the thermal dehydration of SrB6O10.5H2O with different morphologies was calculated by Ozawa-Flynn-Wall (OFW) method. The most probable mechanism function of the dehydration reaction was determined by master-plots method, and the average pre-exponential factor of the thermal dehydration of the sample was calculated. The results show that the thermal dehydration of SrB6O10.5H2O is divided into two steps. The activation energy of thermal dehydration reaction is affected by the morphology and size. The activation energy of SrB6O10.5H2O in the first step of thermal dehydration is close, while there is a significant difference in the activation energy value of SrB6O10.5H2O in the second step of thermal dehydration. The order of activation energy, as well as the order of the average pre-exponential factor, is consistent with the size order of the constituent units of the sample microstructure. The first-step thermal dehydration mechanism functions of SrB6O10.5H2O (globular-like, sheet-like, coral-like) are all [-ln(1-& alpha;)]3, which belongs to random nucleation and growth, and the second-step thermal dehydration mechanism functions are & alpha;2(one-dimensional diffusion), & alpha;+(1-& alpha;).ln(1-& alpha;) (two-dimensional diffusion), and [-ln(1-& alpha;)]3 (random nucleation and growth), the reasons for the difference of their two-step mechanistic functions are analyzed.