Preparation and characterization of Nd2Zr2O7 nanocrystals by a polymeric citrate precursor method
學年 99
學期 1
出版（發表）日期 2010-11-01
作品名稱 Preparation and characterization of Nd2Zr2O7 nanocrystals by a polymeric citrate precursor method
作品名稱（其他語言）
著者 Lee, Y. H.; Sheu, H. S.; Kao, H. C. I.
單位
出版者
著錄名稱、卷期、頁數 Materials Chemistry and Physics 124(1), pp.145-149
摘要 Nd2Zr2O7 was prepared by a polymeric citrate precursor method and then calcined at 700–1400 ◦C in static air. Larger nano-size particles were obtained with increasing calcination temperature. Samples have a defect fluorite phase if they are prepared below 1000 ◦C. However, if it is heat treated at temperature between 1100 and 1400 ◦C, a disordered pyrochlore phase is obtained. Unit cell a-axis dimension of the samples gradually increases with increasing preparation temperature. The amount of cation antisite and the occupancy factor of the O(3) site in the pyrochlore phase gradually decrease in the samples prepared at higher temperatures. In other words, the ordering process is an activated behavior. Activation energies of the cation and anion ordering are 0.12(1) and 0.23(2) eV, respectively, equivalent to 12(1) and 22(2) kJ mol−1.
關鍵字 Phase transitions;Rietveld analysis;Powder diffraction;Oxides
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 H.-C. I. Kao
審稿制度 否
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/104530 )