کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1298484 | 1498413 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of proton conducting composites by mechanical milling for phosphorus-containing solid acids
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Preparation of proton conducting composites by mechanical milling for phosphorus-containing solid acids Preparation of proton conducting composites by mechanical milling for phosphorus-containing solid acids](/preview/png/1298484.png)
چکیده انگلیسی
Solid acids such as AlH2P3O10·2H2O, Zr(HPO4)2·H2O, amorphous-AlPO4, and AlH3(PO4)2·3H2O showed low conductivities of 10â 8-10â 7 S cmâ 1 at 130 °C, whereas mechanical milling for these solid acids was found to improve the conductivities by 2 to 4 orders of magnitude. On the other hand, a large amount of phosphorus was leached out during a durability test after milling. XRD showed the solid acids were transformed to amorphous or crystal-amorphous composites by mechanical milling. 31P MAS NMR spectra indicated that the intensities of the bands due to Q3 and Q4 units decreased and that of the peak due to Q0 units increased. The increase in conductivity and the decrease of chemical durability of the mechanically milled solid acids are probably caused by the formation Q0 units, i.e., orthophosphoric acid, in the resultant composites due to the disruption of inorganic structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 39â40, December 2005, Pages 2899-2904
Journal: Solid State Ionics - Volume 176, Issues 39â40, December 2005, Pages 2899-2904
نویسندگان
Atsunori Matsuda, Teruaki Tezuka, Yoshitaka Nono, Kiyoharu Tadanaga, Tsutomu Minami, Masahiro Tatsumisago,