کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5440678 1398235 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanocrystalline semiconducting donor-doped BaTiO3 ceramics for laminated PTC thermistor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Nanocrystalline semiconducting donor-doped BaTiO3 ceramics for laminated PTC thermistor
چکیده انگلیسی
This paper proposed a two-stage thermal processing method combined with the reduction-reoxidation procedure. Samples were firstly sintered in a reducing atmosphere by two stages and then reoxidized in air. Such two-stage thermal processing method was used to adjust density and grain size of ceramics separately. Finally, nanocrystalline semiconducting donor-doped BaTiO3 ceramics were first successfully prepared. Samples with average grain size of 340 nm exhibited unexpectedly low room resistivity of 136 Ω cm and a significant PTCR effect, with a resistance jump of 4 orders of magnitude. In addition, depletion layer thickness of 40 nm and surface acceptor-state densities of 9.52 × 1013 cm−2 were also calculated. Such good properties had not been reported in former publications. It also means that smaller components based on semiconducting BaTiO3 ceramics could be produced and more extensive application field could be proposed in the trend of miniaturization of electronic devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 4, April 2017, Pages 1523-1528
نویسندگان
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