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Variation of fundamental and higher-order Raman spectra of ZrO 2 nanograins with annealing temperature
| Content Provider | Semantic Scholar |
|---|---|
| Author | Siu, Gilles Stokes, Maria J. |
| Copyright Year | 1999 |
| Abstract | ZrO2 nanograins annealed at different temperatures are systematically investigated using x-ray diffraction ~XRD! and Raman spectroscopy. Our results show that bulk properties of nano-ZrO 2 diminish but the defect-, surface-, and size-related features display as grain size decreases. A critical size that divides respective predominance is determined to be about 15 nm. Both XRD and Raman spectra of nano-ZrO 2 f size above 15 nm are similar to bulk ones. On the contrary, those of nano-ZrO 2 of size below 15 nm are deteriorated bulk spectra with spectroscopic line broadening and merging, line intensity reducing, and position shifting. Deteriorated XRD spectra are essentially associated with increasing defects in small nanograins. General mode softening, a surface mode around 1040 cm 21 and 14 weak second-order ~overtone and combination ! modes are characteristics of Raman spectra of nano-ZrO 2 below 15 nm. They are associated with microstructure change of nanograins, i.e., they reflect the effects of grain size, surface, and the interaction between nanograins. @S0163-1829 ~99!02803-9# |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ap.cityu.edu.hk/ceramicLab/publications/journal/Siu/p3173_1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | GNU nano Guilty Gear Xrd Raman scattering Simulated annealing Softening Spectroscopy, Near-Infrared X-Ray Diffraction |
| Content Type | Text |
| Resource Type | Article |
