Journal Article

PHPPUBDB-16823

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Kinetics of the wurtzite-to-rock-salt phase transformation in ZnO at high pressure

Solozhenko, V. L. ; Kurakevych, O. O. ; Sokolov, P. S. ; Baranov, A. N. ; DESY

2011
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/jp201544f

Abstract: Kinetics of the wurtzite-to-rock-salt transformation in ZnO has been studied in the 5-7 GPa pressure range at temperatures below the activation of diffusion processes. The detailed analysis of non-isothermal experimental data using the general evolution equation describing the kinetics of direct phase transformations in solids allowed us to study the kinetic particularities of both nucleation and growth of the rock-salt phase in parent wurtzite ZnO. The main rate-limiting processes are thermally activated nucleation (E(N) = 383 kJ mol(-1) at 6.9 GPa) and thermally nonactivated (most probably quasi-martensitic) growth (k(G) = 0.833 min(-1) at 6.9 GPa). The high impact of thermal deactivation of nucleation places has been evidenced in the case of slow heating, which indirectly indicates that the rs-ZnO nucleation places are mainly produced by pressure-induced stresses in the parent phase.

Keyword(s): Diffusion (MeSH) ; Kinetics (MeSH) ; Phase Transition (MeSH) ; Pressure (MeSH) ; Salts: chemistry (MeSH) ; Temperature (MeSH) ; Zinc Oxide: chemistry (MeSH) ; Salts ; Zinc Oxide

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Contributing Institute(s):

1. Experiments with synchrotron radiation (HASYLAB)

Research Program(s):

1. DORIS Beamline F2.1 (POF2-54G13) (POF2-54G13)
2. FS-Proposal: I-20100021 EC (I-20100021-EC) (I-20100021-EC)

Experiment(s):

1. DORIS Beamline F2.1 (DORIS III)

Appears in the scientific report 2011
Notes: (c) American Chemical Society. No copyright permission for full text.

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Database coverage:
; JCR ; No Author Disambiguation ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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