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Thermal Stability Study of Nano-Palladium
Yao Lianzeng,Ye Changhui,Mou Jimei,Li Yuanhong,Zhang Lide
Author NameAffiliation
Yao Lianzeng University of Science and Technology of China,Hefei 230026 
Ye Changhui University of Science and Technology of China,Hefei 230026 
Mou Jimei University of Science and Technology of China,Hefei 230026 
Li Yuanhong University of Science and Technology of China,Hefei 230026 
Zhang Lide Institute of Solid State Physics,Chinese Academy of Science,Hefei 230031 
Abstract:
Nano-crystal palladium was prepared through the chemical liquid phase synthesis method.Thermal stability study shows that the average diameter of n-Pd against the annealing temperature fits Arrhenius relation(in the temperature range of 773~523K).The average diameter against the annealing time fits the empirical formula =ktn.The thermal stability temperature is below 250℃。By calculating,we get the apparent growth activation energy about 0.15eV,which is far smaller than ordinary nano-composite material.So,n-Pd is very easy to grow,and possesses a narrow thermal stability temperature range.
Key words:  Nano-palladium,Thermal stability,Apparent activation energy
FundProject:国家重大基础研究攀登计划预选和国家自然科学基金(19674051)资助项目
纳米Pd粉的热稳定性研究
姚连增,叶长辉,牟季美,李远红,张立德
摘要:
采用化学液相合成法制备了纳米Pd,热稳定性研究表明,温度在773~523K内,样品的平均粒径与退火温度T之间服从Arrhenius关系,且平均粒径与退火时间t之间满足经验公式=ktn。纳米Pd的热稳定范围T≤250℃。计算得到纳米Pd颗粒生长的表观激活能为0.15eV,远比纳米复合材料的生长激活能小(约为1eV)。故纳米Pd颗粒-极易长大,热稳定范围非常窄。
关键词:  纳米Pd  热稳定性  表观激活能
DOI:10.1088/1674-0068/13/1/84-88
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