TiO_(2)与三种Al源粉体制备Al_(2)TiO_(5)体系陶瓷  

Preparation of Al_(2)TiO_(5)ceramics by TiO_(2)and three kinds of Al source powders

作　　者：李长青 毕建聪 张俊才 张艳军 闫凯 LI Changqing;BI Jiancong;ZHANG Juncai;ZHANG Yanjun;YAN Kai(School of Mathematics and Physics,Hechi University,Hechi 546399,China;School of Materials Science and Engineering,Heilongjiang Institute of Science and Technology,Harbin 150022,China)

机构地区：[1]河池学院数理学院,广西河池546399 [2]黑龙江科技大学材料科学与工程学院,黑龙江哈尔滨150022

出　　处：《兵器材料科学与工程》2024年第6期47-52,共6页Ordnance Material Science and Engineering

基　　金：河池学院2023年高层次人才科研启动项目(2023GCC012);黑龙江省自然科学基金(LH2021E107);黑龙江省省属本科高校基本科研业务费项目(2021-KYYWF-1459)。

摘　　要：TiO_(2)粉体分别与三种Al源粉体固相反应合成Al_(2)TiO_(5)体系陶瓷,对其反应过程及相含量进行对比研究。TiO_(2)粉分别与Al粉、Al_(2)O_(3)粉、Al(OH)_(3)粉以摩尔比1∶2、1∶1、1∶2混合12 h后以不同温度煅烧,再真空1600℃高温固相烧结制备陶瓷,球磨之后的粉体用差热-热重、X射线衍射进行表征,用扫描电子显微镜对煅烧后的粉体及烧结陶瓷表征。结果表明:在TiO_(2)-Al体系中,锐钛型TiO_(2)转变为金红石型TiO_(2)的温度低于TiO_(2)-Al_(2)O_(3)体系和TiO_(2)-Al(OH)_(3)体系;在TiO_(2)-Al_(2)O_(3)体系中,在1600℃煅烧后,其断口以沿晶断裂为主,而TiO_(2)-Al、TiO_(2)-Al(OH)_(3)穿晶、沿晶断裂混杂;TiO_(2)-Al(OH)_(3)体系在1400℃煅烧温度下,Al_(2)TiO_(5)合成率最高,TiO_(2)和Al_(2)O_(3)残留少,在1600℃煅烧温度下的Al_(2)TiO_(5)相c轴大,生成的Al_(2)TiO_(5)相稳定性高。TiO_(2)粉体与不同Al源粉体在反应过程中,不同活性对Al_(2)TiO_(5)体系陶瓷反应过程及晶粒特征有一定的影响。Al_(2)TiO_(5)ceramics were synthesized by solid phase reaction between TiO_(2)powder and three kinds of Al source powders,and the reaction process and phase content were compared.TiO_(2)powder was mixed with Al powder,Al_(2)O_(3)powder and Al(OH)_(3)powder at molar ratio of 1∶2,1∶1 and 1∶2 for 12 h,calcined at different temperatures,and then sintered under vacuum at 1600℃in solid phase to prepare ceramics.The powder after ball milling was characterized by DTG and X-ray diffraction.The calcined powders and sintered ceramics were characterized by scanning electron microscopy.The results show that the conversion temperature of anatase TiO_(2)to rutile TiO_(2)in TiO_(2)-Al system is lower than that of TiO_(2)-Al_(2)O_(3)system and TiO_(2)-Al(OH)_(3)system.In the TiO_(2)-Al_(2)O_(3)system,after calcination at 1600℃,the fracture is mainly intergranular fracture,while TiO_(2)-Al,TiO_(2)-Al(OH)_(3)intergranular fracture is mixed.At the calcination temperature of 1400℃,the synthesis rate of Al_(2)TiO_(5)is the highest,and the residue of TiO_(2)and Al_(2)O_(3)is less.At the calcination temperature of 1600℃,the c-axis of Al_(2)TiO_(5)phase is large,and the generated Al_(2)TiO_(5)phase has high stability.The different activity of TiO_(2)powder and different Al source powder in the reaction process has a certain influence on the reaction process and grain characteristics of Al_(2)TiO_(5)system ceramics.

关 键 词：Al_(2)TiO_(5) 氧化钛 Al源粉体 生成率 

分 类 号：TB332[一般工业技术—材料科学与工程]