%0 Journal Article
%T Preparation and Low Temperature Heat Capacity of the ZnO Nano-Powders<br>纳米粉ZnO的制备及低温热容研究
%A YI Qiu-Shi
%A WU Xin-Ming
%A TAN Zhi-Cheng
%A <br>易求实
%A 吴新明
%A 谭志诚
%J 无机材料学报
%D 2001
%I Science Press
%X The 18nm ZnO ultrafine powders with the wurtzite phase were prepared by using a new method of liquidoid precipitation, and characterized by XRD, TEM. The heat capacities of the powder in 78~370K were also measured with a high precision automatic adiabatic calorimeter and compared with that of the coarse crystal powders cited from literature. The relation between heat capacities and grain sizes of the nano ZnO powders was demonstrated in the view of energetics. The results obtained show that the distribution of the nano ZnO powders is narrow, and their purity is more then 99.9%. The polynomal equation fitted expressing the change of heat capacities with temperatures is Cp = 40.042 24.554X 0.93033X2 2.1649X3 - 1.8389X4.
%K nanometer ZnO
%K wurtzite phase
%K liquidoid precipitation method
%K low-temperature heat capacity<br>纳米ZnO
%K 纤锌矿晶型
%K 液相沉淀法
%K 低温热容
%K 氧化锌
%K 纳米材料
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=5F67F10D464A72A8&yid=14E7EF987E4155E6&vid=7801E6FC5AE9020C&iid=E158A972A605785F&sid=E6A0A363CA4FC5CF&eid=23F919F7BAF87909&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=15&reference_num=14