کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9782949 1511866 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electromechanical and dielectric properties of Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3-BaTiO3 lead-free ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Electromechanical and dielectric properties of Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3-BaTiO3 lead-free ceramics
چکیده انگلیسی
Electromechanical and dielectric properties of (1-3x)NBT-2x KBT-xBT lead-free ceramics were investigated. XRD results show that the crystalline structure of the ceramics was perovskite. The morphotropic phase boundary (MPB) of the ternary system between rhombohedral and tetragonal locates in the range of x = 0.025-0.035. The preferred piezoelectric constant d33 = 150 pC N−1 and planar electromechanical coupling factor kp = 0.298 are observed at x = 0.035, corresponding to a relatively large remanent polarization of Pr = 35.0 μC cm−2 and a relatively low coercive field of Ec = 4.55 kV mm−1. Temperature dependence of dielectric constant at different frequencies shows that the ferroelectric characteristic of (1-3x)NBT-2xKBT-xBT lead-free ceramics transforms from relaxor ferroelectric to normal ferroelectric with increasing of KBT and BT concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 94, Issues 2–3, 15 December 2005, Pages 328-332
نویسندگان
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