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Iranian Journal of Materials Science and Engineering، جلد ۱۹، شماره ۱، صفحات ۱-۱۴
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عنوان انگلیسی Thermal and Electrical Characterization of (1-x)Na2O-xAl2O3-P2O5 System Glasses
چکیده انگلیسی مقاله Phosphate glass with different Al2O3 and Na2CO3 compositions [80NaH2PO4-(20-x) Na2CO3-xAl2O3 with a step from 0 to 4] were prepared through melt quenching technique furnace at 900 °C. In order to determine the structure and microstructure modification of the samples after heat treatment the IR and Raman spectroscopy were performed. The X-ray diffraction (XRD) result shows an amorphous character of the prepared glass. The result obtained by differential scanning calorimetry (DSC) reveals a good thermal stability in the temperature range of 25 to 400 °C. The impedance Nyquist diagrams were investigated and modeled by resistors and constant phase elements (CPE) equivalent circuits. These measurements show a non-Debye type dielectric relaxation. Both AC and DC conductivity, dielectric constant, and loss factors were determined. Thermal activation energies were also calculated. A changes in the electrical conductivity and activation energy depend upon the chemical composition were observed. Also, a transition in the conduction mechanism from ionic to mixed ionic polaronic was noted. In the same line, electrical modulus and dielectric loss parameters are also deduced. Their frequency and temperature dependency exhibited relaxation behavior. Likewise, activation energies value obtained from the analysis of M'' and those obtained from the conductivity are closes, which proves the optimal character of the preparation conditions.
کلیدواژه‌های انگلیسی مقاله Phosphate glasses,Nyquist diagrams,X-ray diffraction,Conductivity,Activation energy,Thermal properties
نویسندگان مقاله | Nihel Hsouna
1Laboratory of Physico-Chemistry of Mineral Materials and their Applications, National Center for Research in Materials Sciences, Borj Cedria Technopark, BP 73, 8027 Soliman, Tunisia


| Mohsen Mhadhbi
Laboratory of Useful Materials, National Institute of Reserach and Physicochemical Analysis


| Chaker Bouzidi
Laboratory of Physico-Chemistry of Mineral Materials and their Applications, National Center for Research in Materials Sciences, Borj Cedria Technopark, BP 73, 8027 Soliman, Tunisia
نشانی اینترنتی http://ijmse.iust.ac.ir/browse.php?a_code=A-10-4018-1&slc_lang=en&sid=1
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Ceramics
نوع مقاله منتشر شده Research Paper
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