کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1592505 1515637 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Elastic moduli of orthorhombic perovskites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Elastic moduli of orthorhombic perovskites
چکیده انگلیسی

In this paper, semiempirical formulae for both bulk modulus (B in GPa) and shear modulus (G in GPa) of orthorhombic perovskite structured solids are elaborated in terms of volume (Vm) and product of ionic charges (ZaZbZc) of the bonding. Values of elastic moduli, of the group A+1B+2X3, (X=F. Cl, Br), A+2B+4O3 and A+3B+3O3 orthorhombic perovskites exhibit a linear relationship when plotted against the volume (Vm) normalization, but fall on different straight lines according to the product of ionic charges of the compounds. The resulting expressions can be applied to a broad selection of perovskite (ABX3=A: large cation with different valence, B: transition metal and X: oxides and halides) materials and their modulus predictions are in good agreement with the experimental data and those from ab initio calculations.


► Elastic moduli of perovskites are investigated with the help of ionic charge theory.
► The proposed model only the volume of cell is required as input.
► The method turns out to be widely applicable.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 158, March 2013, Pages 34–37
نویسندگان
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