کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1621407 1005747 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric and piezoelectric studies of perovskite-tungsten bronze structured (1 − x)PLZT-xPBBiN nanoceramic composites by high-energy mechanical activation technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Dielectric and piezoelectric studies of perovskite-tungsten bronze structured (1 − x)PLZT-xPBBiN nanoceramic composites by high-energy mechanical activation technique
چکیده انگلیسی
Polycrystalline (1 − x)PLZT-xPBBiN ferroelectric complex ceramic nanocomposites were synthesized through high-energy mechanical activation technique. It is found that milling time has a significant impact on the phase formation, particle size and grain growth. The optimized compositions were subjected to XRD, SEM, dielectric and piezoelectric studies. Powder X-ray diffraction studies revealed that the nanocomposites consisted of both perovskite (tetragonal) and tungsten bronze (orthorhombic) structures whilst pure PLZT showed perovskite structure and pure PBBN showed tungsten bronze structure. As the PBBN content increased, the in situ prepared perovskite and tungsten bronze nanocomposites revealed a bi-phase formation. It is worth mentioning that crack-free nanoceramic composites were obtained. The maximum dielectric constant (ɛRT = 2509), piezoelectric planar coupling coefficient (kp = 0.584) and the piezoelectric charge coefficient (d33 = 596 pC/N) were observed for x = 0.6 nanoceramic composite. It has been observed that the dielectric and piezoelectric constants increased gradually with increasing x up to 0.6 and was found optimum, which could be ideal for electromechanical and energy harvesting applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 488, Issue 1, 20 November 2009, Pages 211-216
نویسندگان
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