کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1531587 | 995839 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of magnesium niobate precursor and calcination condition on phase formation and morphology of lead magnesium niobate powders
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
A perovskite phase of lead magnesium niobate, Pb(Mg1/3Nb2/3)O3 or PMN, powders has been synthesized by a rapid vibro-milling technique. Both columbite MgNb2O6 and corundum Mg4Nb2O9 have been employed as magnesium niobate precursors, with the formation of the PMN phase investigated as a function of calcination conditions by thermal gravimetric and differential thermal analysis (TG-DTA) and X-ray diffraction (XRD). The particle size distribution of the calcined powders was determined by laser diffraction technique. Morphology, crystal structure and phase composition have been determined via a combination of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy-dispersive X-ray (EDX) techniques. The magnesium niobate precursor and calcination condition have been found to have a pronounced effect on the phase and morphology evolution of the calcined PMN powders. It is seen that optimisation of calcination conditions can lead to a single-phase PMN in both methods. However, the formation temperature and dwell time for single-phase PMN powders were lower for the synthetic method employing a columbite MgNb2O6 precursor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 132, Issue 3, 15 August 2006, Pages 292-299
Journal: Materials Science and Engineering: B - Volume 132, Issue 3, 15 August 2006, Pages 292-299
نویسندگان
R. Wongmaneerung, T. Sarakonsri, R. Yimnirun, S. Ananta,