کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438332 | 1398183 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of molar ratio of total metal ions to precipitant on YAG:Ce nanophosphors synthesized by reverse titration coprecipitation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Impact of molar ratio of total metal ions to precipitant on YAG:Ce nanophosphors synthesized by reverse titration coprecipitation Impact of molar ratio of total metal ions to precipitant on YAG:Ce nanophosphors synthesized by reverse titration coprecipitation](/preview/png/5438332.png)
چکیده انگلیسی
Systematic study on the impact of the pH value was performed in the preparation of YAG:Ce nanophosphor powders by reverse titration method. Therefore, we used wider range of the pH values from 5.0 to 8.3 for the synthesis, correlating closely with ratio R of the total metal ions to precipitant ammonium hydrocarbonate in the solution from 1:3 to 1:9. The calcination temperatures of 1050 °C and 1300 °C were tested for the crystallization of YAG:Ce nanophosphors. Acidic condition is more preferable for improved YAG:Ce nanophosphors through XRD spectra analysis for the type of crystals and the crystal size. The molar ratio Y3+/Al3+ in the precursor was controlled at the level of R =1:3 to keep the stoichiometric ratio of YAG:Ce. SEM images showed the YAG:Ce nanophosphors prepared at acidic condition having smaller crystal size and improved dispersibility. Fluorescence spectrum displayed much stronger emission at R =1:3. The molar ratio R is a vital factor to control the quality of the YAG:Ce powders. The nanophosphors prepared at R =1:3 possessed the best fluorescence emission.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 12, 15 August 2017, Pages 8730-8734
Journal: Ceramics International - Volume 43, Issue 12, 15 August 2017, Pages 8730-8734
نویسندگان
Qi Qiu, Manjie Huang, Weimeng Zheng, Chaoyan Xuan, Yong Wan, Bo Zhang, Zhongkuan Luo, Weizhong Lv,