退火温度和压力对ZnS纳米颗粒结构转变的影响

We demonstrate that annealing pressures and temperatures play roles on the structural transition process of ZnS nanoparticles from sphalerite to wurtzite. Under the pressure of 1 GPa, the structural transition of the ZnS nanoparticles begins at 250℃, much lower than that 400-500 ℃ for ZnS nanoparticles under normal pressures. With increasing the annealing temperature, the transition is enhanced then inhibited with a maximum transition fraction of 14% at 300 ℃and disappears at 500℃. At the annealing temperature of 300 ℃, the structural transition of ZnS nanoparticles keeps almost invariable with the increase of the pressure from 0.6 GPa to 1 GPa .