کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5458722 1516171 2017 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel chemical reaction co-precipitation method for the synthesis of apatite-type lanthanum silicate as an electrolyte in SOFC
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Novel chemical reaction co-precipitation method for the synthesis of apatite-type lanthanum silicate as an electrolyte in SOFC
چکیده انگلیسی
Apatite-type lanthanum silicates have promising performance as electrolyte materials for IT-SOFC. A novel co-precipitation method, based on chemical reaction, is employed in the synthesis process. The reaction products: La(OH)3 and SiO2 are used as precursors of apatite synthesis process. The precursors are mixed in molecular scale which provide much conducive to formation reaction. The pure apatite phase composition is obtained with quite moderate temperature of 700 °C for 6 h which shows considerable ionic conductivity performance. The conductivity decreases when you increase the calcination temperature in according with XRD measurement. The XRD measurement shows the presence of impurity phase when the calcination temperature increases. Furthermore, the activation energies of the apatite synthesized in this study are rather high in comparison with the literature data, which can be attributed to a presence of the impurity phase. The ionic conductivity is controlled by the grain boundaries contributions for low calcination temperature and by the grains contributions for the sample calcined at 1000 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 723, 5 November 2017, Pages 418-424
نویسندگان
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