钛源种类对非水解溶胶-凝胶法合成Fe_(2)TiO_(5)的影响  

Effects of Titanium Sources on Phase Formation of Fe_(2)TiO_(5) with Nonhydrolytic Sol-gel Process

作　　者：江峰 尹丽 冯果 罗统斌 赵迁迁 吴倩 刘健敏 张权 程思 江伟辉 JIANG Feng;YIN Li;FENG Guo;LUO Tongbin;ZHAO Qianqian;WU Qian;LIU Jianmin;ZHANG Quan;CHENG Si;JIANG Weihui(Department of Material Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,Jiangxi,China;National Engineering Research Center for Domestic&Building Ceramics,Jingdezhen Ceramic University,Jingdezhen 333000,Jiangxi,China;Guangxi Sanhuan Enterprise Group Company,Beiliu 530007,Guangxi,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,江西景德镇333403 [2]景德镇陶瓷大学国家日用及建筑陶瓷工程技术研究中心,江西景德镇333000 [3]广西三环企业集团股份有限公司,广西北流530007

出　　处：《陶瓷学报》2021年第6期984-989,共6页Journal of Ceramics

基　　金：国家自然科学基金(51962014,52072162);江西省重点研究计划项目(20192BBEL50022);江西省青年基金重点项目(20202ACBL241006);江西省教育厅科学技术研究一般项目(GJJ201318);景德镇科技计划项目(20202GYZD013-009,20202GYZD013-014);中国科学院特种无机涂层重点实验室开放基金项目(ICM-202001)。

摘　　要：采用非水解溶胶-凝胶(NHSG)法合成Fe_(2)TiO_(5),借助DTA-TG、XRD和FT-IR等测试手段研究了钛源种类对Fe_(2)TiO_(5)合成的影响规律和机制。结果表明:以Ti{OCH(CH_(3))_(2)}_(4)为钛源时,异丙基的空间位阻效应导致其难以受亲核攻击,进而无法在凝胶中形成Fe-O-Ti键,导致无法低温合成Fe_(2)TiO_(5)。以TiCl_(4)和Ti(OC_(4)H_(9))_(4)为钛源时,凝胶中可以形成Fe-O-Ti键合,确保Fe_(2)TiO_(5)的低温合成,但TiCl_(4)和氧供体乙醇反应产物易形成双分子缔合结构,偏向于同质缩聚,导致Fe_(2)TiO_(5)的低温合成效果并不理想。优选Ti(OC_(4)H_(9))_(4)为钛源可以在600℃合成Fe_(2)TiO_(5),并在800℃合成Fe_(2)TiO_(5)纯相。Fe_(2)TiO_(5) was synthesized by using a nonhydrolytic sol-gel(NHSG)method.Effects of titanium sources on the phase formation of Fe_(2)TiO_(5) were studied with DTA-TG,XRD and FT-IR.It was found that the steric effect of the isopropyl group made it difficult for nucleophilic attack when Ti{OCH(CH_(3))_(2)}_(4) was used as the titanium source,thus failing to form Fe-O-Ti bonds in the gel.As a result,Fe_(2)TiO_(5) was not available at low temperatures.When TiCl_(4) or Ti(OC_(4)H_(9))_(4) was used as the titanium source,Fe-O-Ti bonds can be formed in the gel,thus ensuring the low temperature formation of Fe_(2)TiO_(5).However,the products of TiCl_(4) tended to react with oxygen donors to form a bimolecular structure,which resulted in low quality of Fe_(2)TiO_(5).Ti(OC_(4)H_(9))_(4) is relative better titanium source.Fe_(2)TiO_(5) was present at 600℃ and pure Fe_(2)TiO_(5) could be obtained at 800℃ when Ti(OC_(4)H_(9))_(4) was used as titanium source.

关 键 词：Fe_(2)TiO_(5) 合成 非水解溶胶-凝胶法 钛源 

分 类 号：TQ174.75[化学工程—陶瓷工业]