Sintering and optical properties of transparent ZnS ceramics by pre-heating treatment temperature
| Autor: | Ji-Sun Yun, Jong-Hoo Paik, Chang Sun Park, Young Hun Jeong, Chang-Il Kim, Tae-Hyeong Kwon, Jeong Ho Cho, Younwoo Hong, Seo-Yeong Yeo |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Sintering 02 engineering and technology engineering.material 01 natural sciences chemistry.chemical_compound 0103 physical sciences Materials Chemistry Transmittance Hydrothermal synthesis Ceramic Electrical and Electronic Engineering 010302 applied physics technology industry and agriculture Hexagonal phase 021001 nanoscience & nanotechnology Condensed Matter Physics Zinc sulfide Electronic Optical and Magnetic Materials Sphalerite Chemical engineering chemistry Mechanics of Materials visual_art Ceramics and Composites engineering visual_art.visual_art_medium Particle size 0210 nano-technology |
| Zdroj: | Journal of Electroceramics. 41:1-8 |
| ISSN: | 1573-8663 1385-3449 |
| DOI: | 10.1007/s10832-018-0137-y |
| Popis: | The main objective of our work is to increase transmittance in the mid infrared region by removing impurities through the pre-heating treatment of zinc sulfide (ZnS) produced by hydrothermal synthesis. The pre-heating treatment proceeded at 450 to 600 °C for 2 h under vacuum atmosphere (10−2 Torr). It was confirmed that the particle size increased as the pre-heating temperature increased. Additionally, all ZnS nano powders had a sphalerite (cubic) structure unaffected by pre-heating treatment. The ZnS nano powders were sintered by hot-press sintering method. As the pre-heating temperature increased, transmittance was improved due to the decreasing of porosity, increase of particle size, and the removal of impurities (carbon and sulfate). However, when the pre-heating treatment temperature was 600 °C, the transmittance slightly decreased due to the formation of a hexagonal phase. The ZnS ceramic with pre-heating treatment at 550 °C showed the highest transmittance (71.6%) and density (99.9%). |
| Databáze: | OpenAIRE |
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