کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1623573 1516411 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and properties of Pb(Co1/3Nb2/3)O3 ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis and properties of Pb(Co1/3Nb2/3)O3 ceramics
چکیده انگلیسی

In this study, Pb(Co1/3Nb2/3)O3 or PCN ceramics have been produced by sintering PCN powders synthesized from lead oxide (PbO) and cobalt niobate (CoNb2O6) with an effective method developed for minimizing the level of PbO loss during sintering. Attention has been focused on relationships between sintering conditions, phase formation, density, microstructural development, dielectric and ferroelectric properties of the sintered ceramics. The densities of sintered PCN ceramics increased with increasing sintering temperature. However, it was observed that at too high temperature the density began to decrease. Change of dielectric properties with sintering temperature also followed the same trend as the density. Based on X-ray diffraction analysis, density data, SEM micrograph, and dielectric properties, the optimum sintering temperature for a high purity PCN ceramic was found to be about 1100 and 1150 °C. A strongly diffused dielectric peak also showed a typical characteristic of ferroelectric relaxors. The P–E hysteresis loops observed at −70 °C were of slim-loop type with small remnant polarization values, which confirmed relaxor ferroelectric behavior of PCN ceramics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 466, Issues 1–2, 20 October 2008, Pages 264–267
نویسندگان
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