کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1296956 1498379 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, structure and electrical properties of Li1 + x + yScxYyTi2 − x − y(PO4)3 (x = 0.15-0.3, y = 0.01-0.15) ceramics
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Synthesis, structure and electrical properties of Li1 + x + yScxYyTi2 − x − y(PO4)3 (x = 0.15-0.3, y = 0.01-0.15) ceramics
چکیده انگلیسی
The powder of Li1 + x + yScxYyTi2 − x − y(PO4)3 (x = 0.15-0.3, y = 0.01-0.15) has been synthesized by solid phase reaction. The structure of the compounds was determined by X-ray diffraction patterns from the powder. The compounds belong to the rhombohedral symmetry (space group R3¯c) with Z = 6 formula units in the lattice. Ceramic samples were sintered in air at temperature Ts = 1523 K varying sintering time (ts) from 1 to 5 h. The element compositions of ceramics were defined by XPS. The complex impedance (Z˜), electric conductivity (σ˜), dielectric permittivity (ɛ˜) of the ceramics in frequency range (106−1.2 · 109) Hz and temperature range (300−600) K were carried out. Two relaxation dispersions of the electric parameters were found for all compounds. The dispersions are caused by the ion transport in grains and grain boundaries of the ceramic samples. The values of the bulk (σb), grain boundaries (σgb) conductivities, their activation energies, and dielectric permittivity are dependent on stoichiometric parameters x, y and sintering conditions of the ceramics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 179, Issues 1–6, 31 March 2008, Pages 159-163
نویسندگان
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