Structure of nanocrystalline ZnO up to 85GPa

Autor:	Ravhi S. Kumar, Andrew Cornelius, Malcolm Nicol
Rok vydání:	2007
Předmět:	Materials science Analytical chemistry General Physics and Astronomy Nanocrystalline material Synchrotron Diamond anvil cell law.invention Crystallography Volume (thermodynamics) law Phase (matter) X-ray crystallography General Materials Science Crystallite Wurtzite crystal structure
Zdroj:	Current Applied Physics. 7:135-138
ISSN:	1567-1739
DOI:	10.1016/j.cap.2006.02.009
Popis:	The structure of nanocrystalline and bulk polycrystalline ZnO were examined up to 85 GPa and 50 GPa, respectively using synchrotron X-rays and diamond anvil cells at ambient conditions. The transition from the wurtzite to the rock salt phase in the nano-ZnO takes place at 10.5 GPa; this transition pressure is 1.5 GPa higher than in bulk ZnO. A large volume collapse of about 17.5% is observed during the transition in both systems. The rocksalt phase is stable and no structural transitions are observed for both compounds at higher pressures up to the experimental limit. On decompression the rocksalt phase is found to co-exist with the wurtzite phase at ambient conditions for the nano-ZnO.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::160f5d087d6df881703eb1b4f7522aa8 https://doi.org/10.1016/j.cap.2006.02.009 Zobrazit plný text záznamu Full Text from ScienceDirect