教師資料查詢 | 類別: 期刊論文 | 教師: 高惠春 KAO, HUEY-CHUEN (瀏覽個人網頁)

標題: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
語言英文(美國)
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
國別荷蘭
公開徵稿
出版型式,電子版,紙本
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