The phase transition behavior of zinc sulfide (ZnS) ceramics consolidated via pressureless and hot press sintering has been investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD) analyses. Two types of ZnS powders with different particle sizes and morphologies were employed to study the influence of microstructural features of starting powders on the ZnS phase transition behaviors. The present work has revealed that during sintering of ZnS ceramics, the phase transition behavior varies based on the starting powder particle size and magnitude of the applied pressure. It has been demonstrated that smaller particle sizes lead to an increased degree of “early” phase transformation from sphalerite to wurtzite at 1000 °C. Additionally, the application of uniaxial pressure during sintering can lead to a reverse phase transition from wurtzite to sphalerite while simultaneously inducing twinning, resulting in improved optical transmittance and mechanical hardness.

通过X射线衍射（XRD），扫描电子显微镜（SEM）和电子背散射衍射（EBSD）分析，研究了通过无压烧结和热压烧结而固结的硫化锌（ZnS）陶瓷的相变行为。研究了两种不同粒径和形貌的ZnS粉末，研究了初始粉末的微观结构特征对ZnS相变行为的影响。目前的工作表明，在烧结ZnS陶瓷过程中，相变行为会根据起始粉末的粒径和所施加压力的大小而变化。已经证明，较小的颗粒尺寸会导致在1000°C时从闪锌矿到纤锌矿的“早期”相变程度增加。此外，