کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1460882 989611 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dependence of dielectric properties on microstructural characteristics of (Ba0.7Sr0.25Ca0.05)(Ti0.9Zr0.1)O3 ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Dependence of dielectric properties on microstructural characteristics of (Ba0.7Sr0.25Ca0.05)(Ti0.9Zr0.1)O3 ceramics
چکیده انگلیسی

The dielectric properties and microstructure of (Ba0.7Sr0.25Ca0.05)(Ti0.9Zr0.1)O3 (BSCTZ) ceramics have been controlled by ZnO addition and/or two-step sintering. The single-phase perovskite structure was observed for all investigated specimens with ZnO addition in the range of 0≤x≤0.15 wt%. With increasing ZnO content, the unit cell volume increased due to the Zn2+ substitution for Ti4+, and the dielectric constant (εr), dielectric loss (tan δ), and breakdown voltage (Vb) of the specimens decreased. The specimens sintered by a two-step method showed high density and homogeneous microstructure with smaller grains which enhanced Vb, whereas εr decreased and tan δ increased slightly. The dielectric properties of the two-step sintered specimens could be controlled by the first-stage sintering temperature T1 because the grain size was more strongly dependent on T1 than on the ZnO content. P–E hysteresis loops were not changed remarkably by ZnO addition and/or two-step sintering.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 41, Supplement 1, July 2015, Pages S2–S8
نویسندگان
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