Hydrothermally synthesized ZnS nanopowders comprising small and large particles were used to synthesize ZnS ceramics. Small particles (200 nm) existed in the gaps between the large particles (0.7 μm) and assisted the densification of the ZnS ceramics. ZnS ceramics sintered at low temperatures (<1000°C) exhibited small grains with large grain‐boundary areas that provided diffusion paths for carbon ions from the graphite mold, resulting in carbonate absorption bands. ZnS ceramics sintered at high temperatures (≥1000°C) for a long time (≥2.0 hours) exhibited a dense microstructure with very large grains (>500 μm). The ZnS liquid phase, which was formed at approximately 980°C, assisted the densification and grain growth of the ZnS ceramics. A 3.0‐mm‐thick ZnS ceramic sintered at 1000°C for 16 hours showed a high Knoop hardness (321 kgf/mm²) and a high transmittance of 71% in the wavelength range 6.0‐12 μm without carbonate absorption bands.

中文翻译：

---

使用水热生产的ZnS纳米粉通过真空热压烧结的高IR透明ZnS陶瓷

包含小颗粒和大颗粒的水热合成ZnS纳米粉被用于合成ZnS陶瓷。小颗粒（200 nm）存在于大颗粒（0.7μm）之间的间隙中，并有助于ZnS陶瓷的致密化。在低温（<1000°C）下烧结的ZnS陶瓷呈现出具有大晶界面积的小晶粒，这为来自石墨模具的碳离子提供了扩散路径，从而导致碳酸盐吸收带。在高温（≥1000°C）下长时间（≥2.0小时）烧结的ZnS陶瓷表现出致密的微观结构，具有非常大的晶粒（> 500μm）。大约在980°C形成的ZnS液相有助于ZnS陶瓷的致密化和晶粒长大。3.0毫米厚的ZnS陶瓷在1000°C下烧结16小时显示出较高的努氏硬度（321 kgf / mm²）且在没有碳酸盐吸收带的情况下在6.0-12μm的波长范围内具有71％的高透射率。