کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1476447 | 1510146 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Screen-printed varistors: New strategy for high non-linear coefficient
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Screen-printed thick film varistors (TFV) based on ZnO powder were developed with the aim to protect IGBT power transistors against overvoltages. The electrical characteristic of TFV was shown to depend on the electrode composition. Furthermore, characterization of the microassembly [electrodes/ZnO/Al2O3 substrate] proved that in the case of ZnO layers fired at 1200 °C, the low non-linearity coefficients (α < 10) were correlated to the bismuth oxide evaporation and/or migration to the substrate. Higher non-linear coefficients were obtained only with electrode inks containing small amounts of Bi2O3. The obtained values of α larger than 40 are the highest ones so far recorded for ZnO TFV and compare well to those of ceramics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 27, Issues 13â15, 2007, Pages 3883-3886
Journal: Journal of the European Ceramic Society - Volume 27, Issues 13â15, 2007, Pages 3883-3886
نویسندگان
Claude Lucat, Marie-Pascale Martin, Hélène Debéda-Hickel, Alain Largeteau, Francis Ménil,