Growth of ZnO single crystals by an induced nucleation from a high temperature solution of the ZnO-PbF2 system by Xinhua Li, Jiayue Xu, Min Jin, Xianjun Wu, Guoxing Qian, and Xiaomin Li

Crystal Research and Technology

Cryst. Res. Technol. 42, 221 (2007) - Abstract -

Growth of ZnO single crystals by an induced nucleation from a high temperature solution of the ZnO-PbF₂ system

Xinhua Li, Jiayue Xu, Min Jin, Xianjun Wu, Guoxing Qian, and Xiaomin Li

Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P.R. China

Keywords	flux, single-crystal growth, zinc oxide, Bridgman growth technique
PACS	81.10.Dn, 81.05 Dz, 77.84.Bw
DOI	10.1002/crat.200610803

To grow ZnO single crystals from a high temperature solution of the ZnO-PbF₂ system, a gas cooling system was assembled at the bottom of the crucible to induce nucleation in the initial growth stage. The growth experiments were carried out in a homemade vertical Bridgman furnace and Pt crucible of 28 mm in diameter was used. The furnace temperature was set to 1100°C and the flow rate of the oxygen gas was optimized as 3.0 l/min. ZnO crystal up to 5~8 mm in the thickness was obtained with the lowering rate of 0.3 mm/h. XRD patterns showed that the as-grown crystal was pure ZnO Wurtzite phase. The impurity ions were analyzed by the glow discharge mass spectroscopy (GDMS) as 390.0 ppm and 40.0 ppm for Pb²⁺ and F^-, respectively.

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