کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1482656 991573 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase transitions and macroscopic properties of NaNO3 embedded into porous glasses
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Phase transitions and macroscopic properties of NaNO3 embedded into porous glasses
چکیده انگلیسی

The crystal structure and dielectric response of nanocomposite materials on base of porous glasses with average pore diameters of 320, 46 and 7 nm with embedding sodium nitrate have been studied by neutron diffraction and dielectric spectroscopy in low and high temperature phases up to melting. In porous glasses with 46 and 7 nm pores NaNO3 forms dendrite nanoclusters with "diffraction" sizes of 50(2.5) and 20(2) nm. Decreasing of particle sizes results in decreasing of Tc (temperature of order–disorder orientational transition) and Tmelt and in smearing of structure phase transition. The values of critical exponent β for orientational transition are estimated from temperature dependences of intensities of superstructure elastic peaks for these three types of nanocomposite materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 357, Issue 14, 1 July 2011, Pages 2580–2586
نویسندگان
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