کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1297473 | 1498403 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Emission characteristics of Fâ ions into vacuum from CaF2
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Ion emission characteristics from a fluoride ionic conductor were investigated using CaF2 single crystals. The emission of Fâ ions was confirmed by using a quadrupole mass spectrometer, when a positive electric field was applied to the emission surface of the samples under gas pressure around 10â 3 Pa at 1173 K. Mass spectrometry also revealed that the negative ions emitted from CaF2 contained a certain amount of Oâ ions. It can possibly be explained that the surface of CaF2 was oxidized in the sample preparation. The emission current from CaF2 also decreased with the passage of time and increased with applied voltage and temperature. The applied voltage dependence of the emission current did not follow the Schottky equation. In Arrhenius plots, two regions with different slopes were observed, suggesting that there are two ion emission mechanisms with different activation energies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 177, Issues 19â25, 15 October 2006, Pages 1601-1605
Journal: Solid State Ionics - Volume 177, Issues 19â25, 15 October 2006, Pages 1601-1605
نویسندگان
Takaaki Sakai, Atsushi Kaimai, Takanori Otake, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki, Masateru Nishioka,