کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1334053 979136 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dependence of the mixed alkali effect on temperature and total alkali oxide content in y[xLi2O·(1−x)Na2O]·(1−y)B2O3 glasses
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Dependence of the mixed alkali effect on temperature and total alkali oxide content in y[xLi2O·(1−x)Na2O]·(1−y)B2O3 glasses
چکیده انگلیسی

The complex conductivity spectra of mixed alkali borate glasses of compositions y [xLi2O·(1−x)Na2O]·(1−y)B2O3 (with x=0.0x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0; y=0.1y=0.1, 0.2, 0.3) in a frequency range between 10−2 Hz and 3 MHz and at temperatures ranging from 298 to 573 K have been studied. For each glass composition the conductivities show a transition from the dc values into a dispersive regime where the conductivity is found to increase continuously with frequency, tending towards a linear frequency dependence at sufficiently low temperatures. Mixed alkali effects (MAEs) in the dc conductivity and activation energy are identified and discussed. It has been for the first time found that the strength of the MAE in the logarithm of the dc conductivity linearly increases with the total alkali oxide content, y, and the reciprocal temperature, 1/T.

Composition-dependent dc conductivity of glassy y [xLi2O·(1−x)Na2O]·(1−y)B2O3 (x=0x=0, 0.2, 0.4, 0.6, 0.8, 1.0, and y=0.1y=0.1, 0.2, 0.3) at 473 K.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 178, Issue 11, November 2005, Pages 3376–3380
نویسندگان
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