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 Fluorite-pyrochlore Phase Transformation in Gd2Zr2O7
學年
學期
出版(發表)日期2009/11/01
作品名稱Preparation and Fluorite-pyrochlore Phase Transformation in Gd2Zr2O7
作品名稱(其他語言)
著者Lee, Y.H.; Sheu, H.S.; Kao, H.-C.I.; Deng, J. P.
單位淡江大學化學學系
出版者Amsterdam: Elsevier BV
著錄名稱、卷期、頁數Journal of Alloys and Compounds 487(1-2), pp.595-598
摘要Gd2Zr2O7 prepared by a polymeric citrate precursor method has a defect fluorite phase if it is calcined in static air between 700 and 1200°C; it has a disordered pyrochlore phase, if sample is heat treated at 1300 or 1400°C. Phase transformation is accelerated by increasing the preparation temperature and heat treatment period. Sample prepared at 1400°C is more ordered than that calcined at 1300°C. Unit cell a-axis dimension of the pyrochlore phase is slightly longer than the 2a of the fluorite phase. Expansion of the unit cell is probably due to the different distribution of the oxygen atoms in these two phases and also the preparation method. Samples were quenched from the preparation temperature to room temperature. Particle size analysis on the maximum intense XRD peak by the Scherrer formula is in the range of 6−68 nm, grain grows with increasing the preparation temperature and prolonged heat treatment time.
關鍵字Oxide materials;Chemical synthesis;Crystal structure;Phase transitions;TEM
語言英文
ISSN0925-8388
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者Kao, H.-C.I.
審稿制度
國別荷蘭
公開徵稿
出版型式紙本
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