کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438970 | 1398190 | 2017 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and structure of transparent zinc-niobate-tellurite glasses with low hydroxyl content
ترجمه فارسی عنوان
سنتز و ساختار عینک های شفاف روی-نیوبات تلوریت با مقادیر کم هیدروکسیل
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Low-hydroxyl (OH)-content, transparent zinc-niobate-tellurite glasses (TeO2-Nb2O5-ZnO and TeO2-Nb2O5-ZnCl2) were synthesized by using dry-air atmospheres, stirring of the melt, and preheat treatment before melt preparation. A low OH level (79.8±6.3 ppm) was achieved by performing a preheat treatment of mixed raw chemicals with zinc chloride and then melting in both open- and dry-air atmospheres with several counts of intermittent stirring. However, this sequence of processes resulted mainly in non-crystallized, opaque products. The basis of this opacity was investigated by performing Raman spectroscopy, X-ray diffraction (XRD), and X-ray fluorescence (XRF) measurements on both the opaque and transparent glasses. Raman spectroscopy revealed that the proportion of Te-O-Te bonds, relative to tellurite unit structures (TeO4, TeO3+1, and TeO3), in the opaque glasses decreased with increasing isolated structures of TeO32â. This decrease resulted possibly from atomic-scaled inhomogeneity and immiscible domain formation in the melts and corresponding glasses, which have less amounts of residual OH groups.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 3, 15 February 2017, Pages 2962-2968
Journal: Ceramics International - Volume 43, Issue 3, 15 February 2017, Pages 2962-2968
نویسندگان
Masato Shimoda, Masayuki Uchida, Tomokatsu Hayakawa, Philippe Thomas,