کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1462977 989641 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure, electrical properties, and aging behavior of ZnO–Pr6O11–CoO–Cr2O3–Y2O3–Er2O3 varistor ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Microstructure, electrical properties, and aging behavior of ZnO–Pr6O11–CoO–Cr2O3–Y2O3–Er2O3 varistor ceramics
چکیده انگلیسی

The microstructure, electrical properties, and aging behavior of the ZnO–Pr6O11–CoO–Cr2O3–Y2O3–Er2O3 varistor ceramics were investigated for different contents of Er2O3. The microstructure consisted of ZnO grain and an intergranular layer (Pr, Y, and Er-rich phases) as a secondary phase. The increase of Er2O3 content decreased the average grain size and increased the sintered density. As the Er2O3 content increased, the breakdown field increased from 4206 V/cm to 5857 V/cm and the nonlinear coefficient increased from 32.6 to 48.6. The varistor ceramics added with 1.0 mol% Er2O3 exhibited excellent stability by exhibiting −0.2% in the variation rate of the breakdown field and −2.7% in the variation rate of the nonlinear coefficient for aging stress of 0.95 E1 mA/150 °C/24 h.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 37, Issue 8, December 2011, Pages 3049–3054
نویسندگان
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