王欣,魏宗平,唐电

• 1:福州大学材料研究所

摘要(Abstract)：

采用Pechini方法制备了以RuO2,IrO2和PdO为主的纳米晶活性氧化物,选择适当的热处理温度可获得氧化物单相组织。热处理对所制备的RuO2,IrO2和PdO晶粒尺寸影响很大。尽管随加热温度升高,晶粒尺寸增大;但温度对晶粒尺度的影响并非简单的增长关系:在所制备的3种贵金属氧化物热处理过程中均出现了两段式生长现象,可以转折点为临界温度Tc分为两段,在低于Tc的温区内,晶粒长大较快,在高于Tc的温区长大速率下降。3种活性氧化物的两段式生长,应该属于贵金属氧化物成长的特有现象。认为两段变化过程可以用线性回归方程D=bT+a加以拟合,拟合的经验方程式可用以实现工业过程对晶粒尺寸的控制。

关键词(KeyWords)： 贵金属氧化物;纳米;动力学

Abstract:

Keywords:

基金项目(Foundation): 国家“863”项目(2007AA03Z325);; 福建省重大国际合作项目(2007I002)

作者(Author): 王欣,魏宗平,唐电

DOI: 10.13289/j.issn.1009-6264.2010.11.020

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