کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7744928 | 1498249 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced proton conductivity of niobium phosphates by interfacing crystal grains with an amorphous functional phase
ترجمه فارسی عنوان
هدایت پروتون های پیشرفته فسفات نایوبیوم با اتصال دانه های کریستال با یک فاز کاربردی آمورف
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Niobium phosphate is an interesting proton conductor operational in the intermediate temperature range. In the present work two forms of phosphates were prepared: an amorphous one with high specific area and a crystalline one with low specific surface area. Both phosphates exhibited very low proton conductivities. An activation process was developed to convert the phosphates into crystal grains with a phosphorus rich amorphous phase along the grain boundaries. As a result, the obtained niobium phosphates showed considerably enhanced and stable proton conductivities. The activation effect was prominent when the high surface area amorphous phosphate was used as the precursor. At 250 °C thus obtained niobium phosphate showed a high and stable conductivity of 0.03 S cmâ 1 under dry atmosphere and of 0.06 S cmâ 1 at a water partial pressure of 0.12 atm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 294, 15 October 2016, Pages 54-58
Journal: Solid State Ionics - Volume 294, 15 October 2016, Pages 54-58
نویسندگان
Yunjie Huang, Lele Yu, Haiyan Li, Chengshuai Wang, Qingfeng Li, Qin Shuai,