Thermal decomposition mechanism and particle size regulation in calcination of barium titanyl oxalate tetrahydrate for fabricating barium titanate nanoparticles

作     者：Yunfei Yan Haixia Zhang Junrong Yue Yu Guan Lei Shao Yunfei Yan;Haixia Zhang;Junrong Yue;Yu Guan;Lei Shao

作者机构：State Key Laboratory of Mesoscience and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China Research Center of the Ministry of Education for High Gravity Engineering and TechnologyCollege of Chemical EngineeringBeijing University of Chemical TechnologyBeijing100029China School of Chemical EngineeringUniversity of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Particuology》 (颗粒学报(英文版))

年 卷 期：2025年第98卷第3期

页      面：94-104页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：The authors thank Institutional Center for Shared Technologies and Facilities of Institute of Process Engineering  Chinese Academy of Sciences for necessary characterizations and analysis 

主　　题：BaTiO_(3) Barium titanyl oxalate tetrahydrate Thermal decomposition Activation energy 

摘      要：Barium titanate(BaTiO_(3))is an important ferroelectric and electronic ceramic material because of its outstanding dielectric and ferroelectric *** demand for BaTiO_(3) nanoparticles with adjustable particle size has increased extensively due to the miniaturization of electronic *** oxalate precipitation method is regarded as a highly attractive technology for fabricating BaTiO_(3) nanoparticles,as it enables large-scale production at a low ***,the calcination process is a crucial step that significantly influences the particle size and morphology of the obtained BaTiO_(3) *** study investigates the thermal decomposition mechanism and particle size regulation strategies during the calcination of barium titanyl oxalate tetrahydrate(BTOT)for fabricating BaTiO_(3) *** Kissinger-Akahira-Sunose(KAS)model is used to calculate the kinetic parameters of BTOT thermal decomposition process,and the results indicate that the decomposition process can be divided as four stages,with the average activation energy of 60.77,269.89,484.72,and 199.82 kJ/mol,*** average activation energy reaches its maximum value in the third stage,indicating that the thermal decomposition reaction in this stage is more challenging to occur compared to the other *** gas release behaviors of H_(2)O,CO,and CO_(2) are analyzed on-line during the thermal decomposition of BTOT,and the overall reaction mechanism is ***,by adjusting the calcination parameters,the particle size of BaTiO_(3) could be effectively regulated within the range of 25-120 *** the heating rate from 10 to 40 K/min decreases the average particle size of BaTiO_(3) from 62 to 44 *** the calcination time from 0 to 120 min increases the average particle size from 25 to 71 *** the terminal temperature from 1173 to 1273 K significantly increases the average particle size from 56 to 120 ***,accelerating the heating rat