Effect of ZnO,La_(2)O_(3),and YF_(3)on Crystallization and Rehological Behavior of Y_(2)O_(3)-Al_(2)O_(3)-SiO_(2)Glass  

作　　者：王君 GAO Shengnan ZHENG Qingshuang ZHANG Xiaowei ZHANG Dongliang XIONG Dehua JIN Siqingaowa 王觅堂 焦国豪 WANG Jun;GAO Shengnan;ZHENG Qingshuang;ZHANG Xiaowei;ZHANG Dongliang;XIONG Dehua;JIN Siqingaowa;WANG Mitang;JIAO Guohao(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai,200093,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan,430070,China;School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou,014010,China;Guangxi Academy of Sciences,Nanning,530000,China)

机构地区：[1]School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai,200093,China [2]State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan,430070,China [3]School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou,014010,China [4]Guangxi Academy of Sciences,Nanning,530000,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第4期753-758,共6页武汉理工大学学报（材料科学英文版）

基　　金：the National Natural Science Foundation of China(No.51974168);the Science and Technology Major Project of Inner Mongolia Autonomous Region in China(Nos.2019ZD023 and 2021ZD0028);the State Key Laboratory of Silicate Materials for Architectures(Wuhan University of Technology)(No.SYSJJ2020-08)。

摘　　要：The effect of substitution La_(2)O_(3)and YF_(3)as network modifiers respectively for Y_(2)O_(3),and ZnO as intermediate oxide for Al_(2)O_(3)on crystallization and viscous behavior of Y_(2)O_(3)-Al_(2)O_(3)-SiO_(2)glass was studied.La_(2)O_(3)and YF_(3)substitution for Y_(2)O_(3)decreases the melting temperature of studied glass from 1402 to 1346 and 1379℃,and the activation energy of viscous flow decreases from 340 to 250 and 265 kJ/mol.Meanwhile,ZnO substitution for Al_(2)O_(3)decreases the melting temperature to 1379℃while increases the activation energy of viscous flow to 542 kJ/mol,due to their different role in glass structure.Substitution ZnO for Al_(2)O_(3)refines and homogenizes the crystals size and lowers crystallinity because the nucleation and crystal growth are depressed by higher activation energy of crystallization and change of crystallization mechanism from bulk crystallization to surface crystallization.Replacement of Y_(2)O_(3)by La_(2)O_(3)and YF_(3)respectively also decreases the crystallinity of Y_(2)O_(3)-Al_(2)O_(3)-SiO_(2)glass ceramic due to competitive and hindering effect on the rearranged atoms,structural units and groups required by precipitated two crystals.Besides,y-Y2Si2O7,precipitation of Y4.67(SiO4)3O,ZnAl_(2)O_(4),and Y3Si3O10F were observed respectively due to incorporation of La_(2)O_(3),ZnO,and YF_(3).

关 键 词：Y_(2)O_(3) aluminosilicate glass CRYSTALLIZATION viscous activation energy 

分 类 号：TQ171.1[化学工程—玻璃工业]