کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10625696 989634 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of holmium substitution on structural and electrical properties of barium zirconate titanate ferroelectric ceramics
ترجمه فارسی عنوان
اثر جایگزینی هولمیوس بر خواص ساختاری و الکتریکی سرامیک فرایند الکتریکی زیرکونات تیتانات باریم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
The holmium substituted Ba1−3x/2HoxZr0.025Ti0.975O3 (x=0.01, 0.02, 0.025, 0.05) compositions were synthesized by the solid state reaction technique. The synthesized specimens were characterized for their structural and electrical properties using X-ray diffractometer, scanning electron microscopy, impedance analyzer and loop tracer. Phase analysis shows the formation of secondary phase Ho2Ti2O7 for Ho≥2.5 mol% substitution. The microstructural investigation shows that the holmium substitution significantly reduces the grain size. The substitution of holmium increases the Curie temperature for x≤0.02 whereas Curie temperature decreases for x≥0.025. The maximum dielectric constant at transition temperature is observed for x=0.02. The solubility limit is 2 mol% and for x≥0.025 some of the holmium atoms enter B-sites and forms the secondary phase. An increase is observed in the coercive field of the specimens with the increasing holmium content.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 40, Issue 4, May 2014, Pages 5209-5216
نویسندگان
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