RuO_2-SiO_2粉末的制备及其组织结构表征  

Preparation and characterization of RuO_2-SiO_2 powders

作　　者：邵艳群[1] 郭海燕[1] 唐电[1] 刘雪华[1] 赖华成[1] 

机构地区：[1]福州大学材料研究所,福建福州350108

出　　处：《材料热处理学报》2010年第3期7-11,共5页Transactions of Materials and Heat Treatment

基　　金：国家"863"计划项目(2007AA03Z325);福建省科技厅国际合作重点项目(2007H0106);福建省自然科学基金项目(2009J01239);福州大学科技启动基金(2006-XQ-02)

摘　　要：采用正硅酸乙酯的sol-gel法和RuCl3的Pechini法结合,制备了70mol%RuO2-30mol%SiO2二元氧化物粉末。采用红外光谱(FT-IR)、综合热分析、X射线衍射(XRD)、TEM和比表面(BET)等测试技术研究了产物的形成过程和组织结构。结果表明,晶体颗粒尺寸约为10nm。在200～600℃范围内,SiO2都保持非晶结构。200℃、400℃烧结的样品中晶体只有单质Ru。600℃时,90vol%的Ru被氧化为颗粒大小与Ru单质相当的RuO2。400℃烧结的样品比表面积最大,孔径最小。非晶SiO2可以有效阻止颗粒尺寸长大。这对于钛阳极涂层的制备非常有利。Nanometer 70 mol%RuO2-30mol%SiO2 powders were synthesized by sol-gel method using tetraethylorthosilicate（TEOS）and citrate-gel method using RuCl3. The structure of the powders were characterized by means of FT-IR, DTA-TG, XRD,TEM and BET method. It is shown that the size of the powder particles is about 10 nm.Amorphous SiO2 exists in the range of experimental temperature. Only crystalline Ru metal exists in the powders calcined at 200 and 400℃. 90vol%Ru is oxidated into RuO2 with has the same size as Ru for the powders calcined at 600 ℃. The powders calcained at 400 ℃ present superior thermal properties. The phases of the powders can be effectively controlled by adding SiO2, and it is favorable for the preparation of Ti anodes.

关 键 词：柠檬酸盐凝胶法 纳米材料 组织结构 SIO2 RUO2 

分 类 号：TF123.1[冶金工程—粉末冶金]