کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9761611 | 1498421 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The anion disorder in the perovskite fluoride KCaF3
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The aim of this work was to understand the nature of high conductivity of the perovskite fluoride KCaF3. A series of experiments were carried out using single crystal neutron diffraction. Fourier maps reveal a high degree of anisotropy in the Fâ ion vibrations. Comparison is made between harmonic and anharmonic models for thermal vibration. The results show that KCaF3 is a straightforward structure with a low concentration of defects. There is no significant occupation of interstitial sites and it is likely that the high conductivity is due to a small population of highly mobile vacancies. A model for the conduction mechanism is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 17â18, 31 May 2005, Pages 1571-1575
Journal: Solid State Ionics - Volume 176, Issues 17â18, 31 May 2005, Pages 1571-1575
نویسندگان
D.Z. Demetriou, C.R.A. Catlow, A.V. Chadwick, G.J. Mclntyre, I. Abrahams,