Hydrothermal synthesis and formation of 4ZnO·B_2O_3·H_2O whiskers via a new route

摘要

4ZnO·B_2O_3·H_2O whiskers were prepared from 2ZnO·3B_2O_3·3.5H_2O under hydrothermal process at 160 °C for 10 h. The synthesized product was characterized by XRD, SEM, TG-DSC and FT-IR. SEM results showed that the synthesized 4ZnO·B_2O_3·H_2O whiskers' length was about 3-10 μm and the diameter was 0.2- 0.3 μm. Further study on the whiskers' growth process and mechanism showed that the formation of the whiskers went through three stages and the morphology of 4ZnO·B_2O_3·H_2O changed from irregular particles to rod-like structures and finally to whiskers. The variation of the morphology of the 4ZnO·B_2O_3·H_2O whisker with the concentration of the starting material was investigated.