کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1482327 991562 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
DC electrical conductivity of semiconducting cobalt–phosphate glasses
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
DC electrical conductivity of semiconducting cobalt–phosphate glasses
چکیده انگلیسی

The dc conductivity of semiconducting cobalt–phosphate glasses has been measured at temperatures ranging from 213 to 530 K. Four bulk samples of CoO–P2O5 glasses of different compositions were produced by melting dry mixtures of analytical reagent grades of CoO and P2O5 at temperatures between 1200–1250 °C for 2 h using a press-quenching method from glass melt. Samples were annealed at 400 °C for 1 h. The dc conductivity was found to be dependent on the CoO content in the glass. At temperatures from 213 to 444 K, however, both Mott's variable-range hopping (VRH) and the Greaves' intermediate range hopping models are found to be applicable. VRH at this range of temperatures is attributed to large values of the disorder energy of these glasses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 357, Issue 10, 1 May 2011, Pages 2152–2155
نویسندگان
, , ,