CAJ | 학술논문

以氧氯化锆和二甲基二乙氧基硅烷为前驱体,在无任何表面活性剂的条件下,利用溶胶-凝胶法制备了片状SiO2/ZrO2复合材料.采用X射线衍射仪、扫描电镜、能谱仪、傅立叶变换红外光谱仪、透射电镜等分析了产物的结构和形貌,并探讨了SiO2/ZrO2纳米复合材料的取向生长机理.结果表明,在正丁醇和水的混合溶液中制备的SiO2/ZrO2纳米复合材料的粒径为18 nm,将干凝胶在500℃空气气氛中焙烧2h可以得到四方相片状氧化锆晶体.化合物中的硅原子通过Si-O-Zr化学键与锆原子相连；硅的引入仅影响氧化锆晶体的形貌,而不导致四方相氧化锆结构和尺寸的改变.本文所述方法可望拓展用于制备其他具有类似分级结构的无机功能纳米材料.
이양록화고화이갑기이을양기규완위전구체,재무임하표면활성제적조건하,이용용효-응효법제비료편상SiO2/ZrO2복합재료.채용X사선연사의、소묘전경、능보의、부립협변환홍외광보의、투사전경등분석료산물적결구화형모,병탐토료SiO2/ZrO2납미복합재료적취향생장궤리.결과표명,재정정순화수적혼합용액중제비적SiO2/ZrO2납미복합재료적립경위18 nm,장간응효재500℃공기기분중배소2h가이득도사방상편상양화고정체.화합물중적규원자통과Si-O-Zr화학건여고원자상련；규적인입부영향양화고정체적형모,이불도치사방상양화고결구화척촌적개변.본문소술방법가망탁전용우제비기타구유유사분급결구적무궤공능납미재료.
A facile sol-gel process was used to prepare sheet-like SiO2/ZrO2 composites from zirconium oxychloride and diethoxydimethylsilane as the precursors in the absence of any surfactants.The process involves the oriented growth of SiO2/ZrO2 nanocomposites in the mixed solvent of water and n-propanol.Tetragonal zirconia (t-ZrO2) crystal was obtained by calcining dried sheet-like SiO2/ZrO2 gel at 500 ℃ in air for 2 h.The structure and morphology of the products were analyzed by means of X-ray diffraction,scanning electron microscopy,and transmission electron microscopy.The elemental composition of typical products was determined by means of energy-dispersive X-ray spectrometry.The chemical feature of dried SiO2/ZrO2 gel was analyzed using a Fourier transform infrared spectrometer.It has been found that SiO2/ZrO2 nanocomposite with a grain size of about 18 nm can be readily prepared by the solgel process.Si atom in the nanocomposite is chemically linked to Zr via Si-O-Zr bond； and it only affects the morphology of ZrO2 crystalline but does not lead to changes in the size and phase structure of tetragonal zirconia.The present approach may be extended to preparing other similar hierarchical structures of inorganic functional nanomaterials.