کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7897823 | 1510129 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructural and optical properties of the ZnS ceramics sintered by vacuum hot-pressing using hydrothermally synthesized ZnS powders
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
ZnS nanopowders annealed at low temperatures (â¤550â¯Â°C) have a pure cubic structure, while a small amount of hexagonal phase formed in specimens annealed at temperatures â¥700â¯Â°C. The particle sizes of the ZnS nanopowders increased with the annealing temperature. ZnS ceramics that were sintered using ZnS nanopowders annealed at low temperatures (â¤550â¯Â°C) exhibited low transmittance, because of their porous microstructure. ZnS ceramics that were synthesized using ZnS powders annealed at high temperatures (â¥800â¯Â°C) containing large agglomerated particles, also exhibited low transmittance, due to the presence of a liquid phase. A carbonate absorption band was found from the ZnS ceramics with small grains, because carbon ions diffused from the graphite mold into the ZnS ceramics during sintering, probably through the grain boundaries, and formed carbonates. A ZnS ceramic that was sintered at 1020â¯Â°C using the nanopowders annealed at 750â¯Â°C exhibited dense microstructure, with a large transmittance, 68%, in the wavelength range 6.0-12â¯Î¼m.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 12, September 2018, Pages 4237-4244
Journal: Journal of the European Ceramic Society - Volume 38, Issue 12, September 2018, Pages 4237-4244
نویسندگان
Ku-Tak Lee, Boo-Hyun Choi, Jong-Un Woo, Jeong-Su Kang, Jong-Hoo Paik, Byoung-Uck Chu, Sahn Nahm,