کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5150519 | 1498242 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High temperature phase transition and multiphase state formation in K3H(SO4)2 superprotonic conductor
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
EPR spectra of K3H(SO4)2 (KHS) doped with VO2+ or Mn2+ recorded at the temperature higher than about 440 K are time-dependent and indicate on anomalously slow kinetics of the paraelastic/ferroelastic phase transition which takes place far below the temperature proposed by Baranov et al. (TII = 463 K). The formation of a multidomain state upon heating below TII is manifested as irreversible changes in EPR spectra after sample cooling to room temperature. The angular dependence of EPR spectra indicates that K3H(SO4)2 undergoes a ferroelastic phase transition between the point groups 2/m and 3¯m. The EPR spectra of KHS doped with VO2+ or Mn2+ are rapidly changed into the pseudo-powder ones after annealing above TI = 480 K. This points to a decomposition of the KHS crystal and a multiphase state formation at TI = 480 K, rather than at superprotonic phase transition, which is typical for the majority of compounds of the M3H(XO4)2 type.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 301, March 2017, Pages 152-155
Journal: Solid State Ionics - Volume 301, March 2017, Pages 152-155
نویسندگان
A. Ostrowski, W. Bednarski,