【摘要】 采用热压法制备多晶 Zn S时 ,由于 Zn S是市售原料 ,杂质含量较多 ,必须进行提纯处理。即使如此 ,在热压过程中 ,晶体内仍然存在空穴、晶格缺陷及少量气孔等 ,影响材料透过性能。通过原料掺杂 ,使原料中掺入晶格常数小于Zn S的硫化物 ,可以起到固溶强化作用 ,减少空穴及气孔存在 ,提高晶体致密度 ,从而提高红外透过率 ;另外 ,可以使 Zn S晶体结晶压力降低 ,即降低热压压力 ,为使用低强度材料作模具创造条件更多还原

【Abstract】 Sulfide doped polycrystal ZnS with high optical and mechanical properties were prepared by hot pressing method. The relationship between the different sulfides doped polycrystal ZnS and growth parameter was investigated. Polycrystal ZnS manufacture procedure was optimized as: growth temperature 900 ℃,pressure 80 MPa and cooling rate 50 ℃/h. Based on the doping technique, low strength die was used to develop the high quality polycrystal ZnS.更多还原