کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7899530 | 1510348 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of Eu2O3 on phase crystallization and nanocrystals formation in tellurite glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Glasses of the 17ZnO·32CdO·51TeO2 system doped with Eu2O3 (0-0.75â¯mol per 100â¯mol of oxides) were obtained. Non-isothermal differential scanning calorimetry (DSC) tests showed that the glass transition temperature varied in the range of 354° to 371â¯Â°C with the addition of Eu2O3. The samples were exposed to a thermal treatment in a laboratory oven at 420â¯Â°C. X-ray diffraction analysis of the treated samples showed crystalline phases of a variety of metallic oxides, the intensities of which decreased as the Eu doping amount in the samples increased. In all samples, the strongest peak corresponded to ZnTeO3 with a crystallite size of about 36â¯nm. Fourier Transform Infrared Spectroscopy showed that CdO and ZnO change their role from modifier to a glass former. Raman spectra showed characteristic bands corresponding to γ-TeO2. The observations suggest that Eu2O3 induced structural changes which in turn led to the formation of molecular oxygen in the interstitial network. Deconvolution analysis of Raman spectra and High-Resolution Transmission Electron Microscopy images confirmed the formation of Te2O5, ZnTeO3 and Te nanocrystals. Photoluminescence analysis showed that Eu ions are incorporated as Eu3+ and no reduction occurred after heat treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 499, 1 November 2018, Pages 49-57
Journal: Journal of Non-Crystalline Solids - Volume 499, 1 November 2018, Pages 49-57
نویسندگان
I.V. GarcÃa-Amaya, Ma.E. Zayas, J. Alvarado-Rivera, M. Cortez-Valadez, M. Pérez-Tello, N. Cayetano-Castro, F. MartÃnez-Suárez, A. Mendoza-Córdova,