کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7921175 | 1511745 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Doping of low-Tg phosphate glass with Al2O3, B2O3 and SiO2: Part II- insertion mechanism of Al2O3 and B2O3 in phosphate network characterized by 1D/2D solid-state NMR
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Doping of low-Tg phosphate glass with Al2O3, B2O3 and SiO2: Part II- insertion mechanism of Al2O3 and B2O3 in phosphate network characterized by 1D/2D solid-state NMR Doping of low-Tg phosphate glass with Al2O3, B2O3 and SiO2: Part II- insertion mechanism of Al2O3 and B2O3 in phosphate network characterized by 1D/2D solid-state NMR](/preview/png/7921175.png)
چکیده انگلیسی
In this work, the structural modifications induced by introducing small amounts (1-4â¯mol%) of Al2O3 and B2O3 in low-Tg pyrophosphate glass composition have been investigated using advanced solid-state 1D/2D MAS-NMR techniques. The 31P{X} D-INEPT sequence was used to establish the heteronuclear correlations between the phosphate moieties (31P) and doping elements (Xâ¯=â¯27Al or 11B). The X{31P} REDOR and X/X DQ-SQ NMR techniques were implemented to find out the exact nature and chemical environment adopted by the doping elements within the glass matrix. The NMR analysis confirmed that majority of Al3+ ions entered into the phosphate network as six-coordinated species and all the B3+ ions entered as four-coordinated units. The combined NMR analyses revealed different insertion pathways of Al3+ ion and B3+ ion into the phosphate network. The findings of the study suggest that Al3+ ions attach purely with non-bridging oxygen of the phosphate network without breaking additional P-O-P bonds whilst B3+ ions interact with the network by breaking P-O-P linkages highlighting different chemical natures of these doping elements towards the interaction with phosphate units.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 218, 1 October 2018, Pages 122-129
Journal: Materials Chemistry and Physics - Volume 218, 1 October 2018, Pages 122-129
نویسندگان
P. Rajbhandari, L. Montagne, G. Tricot,