کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1527772 1511862 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Size dependence on the ferroelectric transition of nanosized BaTiO3 particles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Size dependence on the ferroelectric transition of nanosized BaTiO3 particles
چکیده انگلیسی

Nanosized barium titanate particles were prepared by high-gravity reactive precipitation (HGRP) method. The lattice structure, lattice strain, critical size, and hydroxyl defects of the BaTiO3 particles in the size range of 30–250 nm were investigated using SEM, XRD, Raman spectra, and TGA measurements. The average particle size of BaTiO3 powder formed at 80 °C was approximately 30 nm with cubic paraelectric crystal structure. As annealing temperature increased, particle size increased (i.e. length of lattice constant decreased along a axis and increased along c axis). At the size of 70 nm, the crystal structure changed from cubic paraelectric to tetragonal ferroelectric phase. Large lattice expansions of more than 1.3% were detected in particles between 30 and 250 nm. The principles of the lattice expansion were discussed based on XRD, Raman spectra and TGA analysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 98, Issues 2–3, 1 August 2006, Pages 450–455
نویسندگان
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