水热-热解法合成不同形貌的α-Al2O3粉体-论文.pdf

《水热-热解法合成不同形貌的α-Al2O3粉体-论文.pdf》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、第27卷第4期材料研究学报Vl01．27No．42013年8月CHINESEJOURNALOFMATERIALSRESEARCHAugust2013水热．热解法合成不同形貌a-Al203粉体术李兆江元汝赵西成赵亚娟西安建筑科技大学材料与矿资学院西安710055西安建筑科技大学理学院西安710055西安建筑科技大学冶金工程学院西安710055摘要以AI：(so)·18H20、尿素为原料，采用水热．热解法制备A1：0粉体。用XRD、sEM对产物进行表征，研究了水热反应时间、表面活性剂PEG2000、添加剂A1F]等因素对产物形貌的影

2、响。结果表明：120~C水热反应6h，前驱体经1200~C煅烧，用AI(so)·18HO／尿素体系得到球形g-A1O；分别以表面活性剂PEG2000和A1F为添加剂，得到纤维状及片状a-A1O，。讨论了不同形貌a-A1：O，的形成机制。关键词无机非金属材料，AI：O，，形貌，水热一热解，控制合成分类号TQ12文章编号10053093(2013)04．0375．05ControlledSynthesisofa-A1203ofDifferentShapesviatheHydrothermal-·PyrolysisMethodLIZh

3、aoJIANGYuanru2ZHAOXicheng。ZHAOYajuan。J．CollegeofMaterialsandMineralResources,XianUniversityofArchitectureAndTechnology,Xian7100552．SchoolofScience．施anUniversityofArchitectureAndTechnology,man7100553．CollegeofMetallurgicalEngineering,XianUniversityofArchitectureAndTec

4、hnology,Xian710055SuppoSedbyNationalHighTechnologyResearchandDevelopmentProgramofChina(863Program)No．20l1AA05A202；NationalNaturalScienceFoundationofChinaNo．21205092；IndustryFoundationofShanxiProvinceChinaNo．2011K08—26．ManuscriptreceivedJanuary28，2013；inrevisedformMay

5、20，2013Towhomcorrespondenceshouldbeaddressed，Tel(029)82201489，E—mail：jiangyuanru@sina．comABSTRACT6(-AI2O3powderswithdifferenlshapeswerepreparedfromthereactionofafuminumsulfateoctadecahydrateandureabyhydrothermalpyrolysismethod．Theas-preparedproductswerecharacterizedb

6、yX．raydiffraction(XRD)andscanningelectronmicroscopy(SEM)．TheeffectsofreactiontimeandadditivessuchasPEG2000andAIF3onthemorphologiesoftheproductswereevaluated．Withoutadditives．sphericala．Al203powderswereobtainedat120。Cfor6hfoIlowedbycalcinationat1200。C．WhenusingPEG2000

7、andAIF3asadditives，fiber-andtabular．shaped10[_AI2O3powderswereobtainedunderthesamereactionconditionsrespectively．1naddition，thereactionmechanismsoftheformationof6-AI2O3powderswithdiferentshapeswerediscussed．KEYWoRDSinorganicnon-metallicmaterials，AI203，shape，hydrother

8、mal—pyrolysis，controlledsyn-thesisa-A10，广泛应用于陶瓷、耐火材料、研磨抛光、力，显著的屏蔽效应以及反射光线的能力，广泛应用填充材料、光学、电子等各个领域。纤维状A1O。于颜料、涂料、荧光粉原料及化妆品等领域；球形具有高韧性