کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1583138 1514884 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
First-principles study of elastic properties in perovskite PbTiO3
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
First-principles study of elastic properties in perovskite PbTiO3
چکیده انگلیسی

The first-principles calculations of elastic properties in cubic and tetragonal PbTiO3 were performed. Bulk modulus and elastic constants were determined from a density-function theory method within the local density approximation. The clamped-ion and internal-strain parts of elastic constants were computed and found that clamped-ion parts are dominant. The theoretical bulk modulus, Bcubic = 229 GPa and Btetragonal = 61 GPa, agree well with the single crystal experimental data. As a by-product of elasticity calculation, the equilibrium tetragonal-to-cubic phase transition pressure were derived from the enthalpy difference, Pc = 10.1 GPa, consist with the experimental values.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 472, Issues 1–2, 15 January 2008, Pages 269–272
نویسندگان
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