کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5438571 1398185 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improved structural stability and ionic conductivity of Na3Zr2Si2PO12 solid electrolyte by rare earth metal substitutions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Improved structural stability and ionic conductivity of Na3Zr2Si2PO12 solid electrolyte by rare earth metal substitutions
چکیده انگلیسی
Sodium zirconium silicon phosphorus with the composition of Na3Zr2Si2PO12 (NZSP) was prepared by a facile solid state reaction method. The effects of the calcination temperature and rare earth element substitution on the structure and ionic conductivity of the NZSP material were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and AC impedance measurement. The results show that the microstructure and ionic inductivity of the NZSP was strongly affected by the aliovalent substitution of Zr4+ ions in NZSP with rare earth metal of La3+, Nd3+ and Y3+. At room temperature, the optimum bulk and total ionic conductivity of the pure NZSP solid electrolyte sintered under different conditions were 6.77×10−4 and 4.56×10−4 S cm−1, respectively. Substitution of La3+, Nd3+ and Y3+ in place of Zr4+ exhibited higher bulk conductivity compared with that of pure NZSP. Maximum bulk and ionic conductivity value of 1.43×10−3 and 1.10×10−3 S cm−1 at room temperature were obtained by Na3+xZr1.9La0.1Si2PO12 sample. The charge imbalance created by aliovalent substitution improves the mobility of Na+ ions in the lattice, which leads to increase in the conductivity. AC impedance results indicated that the total ionic conductivity strongly depends on the substitution element and the feature of the grain boundary.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 10, July 2017, Pages 7810-7815
نویسندگان
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