L-精氨酸掺杂下ZTS溶液的稳定性研究

Study on the Solution Stability of L-Arginine Doped ZTS Crystals

研究了L-精氨酸掺杂下硫脲硫酸锌(ZTS)溶液中的成核过程,测量了在不同掺杂浓度下ZTS溶液的亚稳区和诱导期。结果表明:随掺杂浓度的增加,溶液的亚稳区变宽,诱导期增大;根据经典成核理论计算了晶体的成核热、动力学参数,分析了溶液稳定性与掺杂浓度的关系,即随着L-精氨酸掺杂浓度的增加,溶液的稳定性得到明显提高。利用化学腐蚀法对ZTS晶体(100)面进行了腐蚀,并用光学显微镜对腐蚀面进行观察,得到了清晰的位错蚀坑。当L-精氨酸掺杂浓度为1.5mol%时,ZTS晶体(100)面位错蚀坑密度最小,适合高光学质量晶体的生长。

In this paper, the nucleation process of ZTS crystals in the solution was investigated under different doping concentrations of L-arginine. The width of the metastable zone and the induction period of ZTS solution were measured under doping with different doping concentration of L-arginine condition. The experimental results show that the metastable zone width and the induction period increased as thedoping concentration increasing. According to the classical nucleation theory, the thermodynamic and kinetic parameters of nucleation were calculated. The （100） plane of ZTS was etched by the method of etching and observed by opticalmicroscopy, and vivid dislocation etching pits were obtained. The results indicate that lower dislocation density could be achieved under the condition of the concentration of 1.5 mol% L-arginine, which is a proper condition for the growth of high quality ZTS crystal.