Kinetics in Solid-state Synthesis of Calcium-barium Sulfo-ferritealuminate(C_(3)BA_(3-y)F_(y)$)Mineral and Its Formation Mechanism  

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作  者:YANG Hui LI Chengming JIANG Dongbing BAO Xingyuan LIANG Chen ZHAO Piqi 杨辉;赵丕琪;姜东兵

机构地区:[1]Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China [2]School of Materials Science and Engineering,University of Jinan,Jinan 250022,China [3]Shandong Province Design&Research Institute of Building Materials Industry,Jinan 250022,China [4]China Construction Eighth Engineering Division New Construction Engineering Co.Ltd.,Jinan 250022,China

出  处:《Journal of Wuhan University of Technology(Materials Science)》2025年第2期359-367,共9页武汉理工大学学报(材料科学英文版)

基  金:Funded by the National Key Research and Development Program of China(2021YFB3802002);the National Natural Science Foundation of China(Nos.52172021 and U22A20126);the Science Foundation for Excellent Young Scholars of Shandong Province(No.ZR2023YQ041);the Natural Science Foundation of Shandong Province(ZR2021ME123);the Taishan Scholars Program(No.tsqn202306224);the Science and Technology Innovation Support Plan for Young Researchers in Institutes of Higher Education in Shandong(No.2019KJA017);the'111 Center'。

摘  要:Calcium-barium sulfo-ferritealuminate(C_3BA_(3-y)F_(y)$)was synthesized by doping Ba-bearing calcium sulphoaluminate(C_3BA_3$)with Fe^(3+).The effects of calcination temperature,holding time and Fe-doping concentration on the solid-state reaction process of the C_(3)BA_(3-y)F_(y)$(y=0,0.2,0.25,0.4,and 0.6)were investigated by the Rietveld/XRD quantitative phase analysis.The experimental results show that Fe-doping not only significantly improvs the synthesis of C_(3)BA_(3-y)F_(y)$,but also reduces the solid-state reaction potential energy barrier and then promots mineral formation.Nevertheless,the mineral begins to decompose when the Fe/Al ratio exceeds 2/13 and the calcination temperature exceeds 1300℃.The Ginstling equation is found to be the most appropriate kinetic model for the statistical fitting of C_(3)BA_(3-y)F_(y)$formation process,based on the mathematical model.It is observed that the apparent activation energy of C_(3)BA_(3-y)F_(y)$decreases and then increases with increasing Fe-doping concentration.

关 键 词:C_(3(BA_(3-y)F_(y)$ FE-DOPING formation kinetics solid-state reaction Rietveld/XRD 

分 类 号:P57[天文地球—矿物学]

 

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