Synthesis and Thermal Stability of Cubic ZnO in the Salt Nanocomposites

Details Synthesis and Thermal Stability of Cubic ZnO in the Salt Nanocomposites Synthesis and Thermal Stability of Cubic ZnO in the Salt Nanocomposites

2011-01-08

arxiv.org/abs/1101.1588v1

Russian Chemical Bulletin, 59 [2] 325-328 (2010)

Physics

Condensed Matter

Materials Science

12 pages, 4 figures, 1 table

Scientific paper

10.1007/s11172-010-0082-7

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 \rightarrow w-ZnO in nanocrystalline zinc oxide under ambient pressure was experimentally studied for the first time by differential scanning calorimetry and high-temperature X-ray diffraction. It was shown that the transition occurs in the 370-430 K temperature range and its enthalpy at 400 K is -10.2 \pm 0.5 kJ mol-1.

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