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题名: Phase transformation in the surface region of zirconia detected by UV Raman spectroscopy
作者: Li, MJ;  Feng, ZH;  Xiong, G;  Ying, PL;  Xin, Q;  Li, C
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2001-08-30
DOI: 10.1021/jp010526l
卷: 105, 期:34, 页:8107-8111
收录类别: SCI
文章类型: Article
部门归属: 5073
项目归属: 503
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The phase transformation of zirconia from tetragonal to monoclinic is characterized by UV Raman spectroscopy, visible Raman spectroscopy, and XRD. Electronic absorption Of ZrO2 in the UV region makes UV Raman spectroscopy more sensitive at the surface region than XRD or visible Raman spectroscopy. Zirconia changes from the tetragonal phase to the monoclinic phase with calcination temperatures elevated and monoclinic phase is always detected first by UV Raman spectroscopy for the samples calcined at lower temperatures than that by XRD and visible Raman spectroscopy. When the phase of zirconia changes from tetragonal to monoclinic, the slight changes of the phase at very beginning can be detected by UV Raman spectroscopy. UV Raman spectra clearly indicate that the phase transition takes place initially at the surface regions. It is found that the phase change from tetragonal to monoclinic is significantly retarded when amorphous Zr(OH)(4) was agglomerated to bigger particles and the particle agglomeration of amorphous zirconium hydroxide is beneficial to the stabilization of t-ZrO2 phase.
关键词[WOS]: SULFATED ZIRCONIA ;  ZRO2 ;  CATALYSTS ;  STABILITY ;  ION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000170729000009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/91265
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, MJ,Feng, ZH,Xiong, G,et al. Phase transformation in the surface region of zirconia detected by UV Raman spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2001,105(34):8107-8111.
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