Abstract
Cubic zinc oxide (rs-ZnO), metastable under normal conditions, was synthesized from the wurtzite modification (w-ZnO) at 7.7 GPa and ∼800 K in the form of nanoparticles isolated in the NaCl matrix. The phase transition rs-ZnO → w-ZnO in nanocrystalline zinc oxide under ambient pressure was experimentally studied for the first time by using differential scanning calorimetry and high-temperature X-ray diffraction analysis. It was shown that the transition occurs in the temperature range from 370 to 430 K and its enthalpy at 400 K is −10.2 ± 0.5 kJ mol−1.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 318–321, February, 2010.
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Sokolov, P.S., Baranov, A.N., Dobrokhotov, Z.V. et al. Synthesis and thermal stability of cubic ZnO in the salt nanocomposites. Russ Chem Bull 59, 325–328 (2010). https://doi.org/10.1007/s11172-010-0082-7
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DOI: https://doi.org/10.1007/s11172-010-0082-7