摘要
采用MoO3、V2O5和PbF2为助熔剂,在坩埚下降法生长炉中研究了ZnO的析晶行为和晶体生长。结果表明,对于MoO3-ZnO高温溶液体系,下降或降温过程中首先析出ZnO,但随着温度继续下降,析出了ZnMoO4晶体;对于V2O5-ZnO体系,通气速率为1.5 L/min时底部出现5 mm厚的绿色ZnO多晶,无法获得单晶;对于PbF2-ZnO体系,自发成核获得了10 mm×10 mm×0.7 mm的ZnO晶体薄片,在2 L/min通气速率下诱导成核生长出25 mm×5 mm的ZnO单晶。
The crystallization behavior of ZnO from MoO3-ZnO, V2O5-ZnO and PbF2-ZnO systems were investigated by the vertical Bridgman method. ZnO can crystallize from MoO3-ZnO high temperature solution but no single crystal ZnO grain was found. What is worse, ZnMoO4 crystallized from the melt when the temperature dropped below 1060℃. Nearly pure ZnO polycrystalline with 5 mm thickness and pale green color was obtained from V205-ZnO binary system at a gas rate of 1.5 L/min. However, we didn＇t get any single crystal grains. As for the PbF2-ZnO high temperature solution, it is easy to obtain 10 mm × 10 mm × 0.7 mm ZnO flake on top of as-grown ingot. By gas-cooling induced nucleation at a gas rate of 2-3 L/min, φ25 mm × 5 mm ZnO single crystal was grown from solution with PbF2 flux.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2008年第2期253-257,共5页
Journal of Synthetic Crystals
