کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
673330 1459499 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermo physico-chemical investigations on A–Te–O (A = Cr, Fe, Ni) system
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Thermo physico-chemical investigations on A–Te–O (A = Cr, Fe, Ni) system
چکیده انگلیسی


• Heat capacity of Cr2TeO6 (s), Fe2TeO6 (s) and Ni3TeO6 (s) were measured.
• Thermal expansion and Gibbs energy of formation of Fe2TeO6 (s) and Ni3TeO6 (s) were measured.
• Enthalpy of formation of AnTeO6 (s) (where A = metal atom, n = 2, 3 or 6) was estimated.
• Heat capacity of TeO3 (s) was estimated.
• Chemical potential diagram was generated for A–Te–O system (A = Fe,Cr,Ni).

The compounds, Cr2TeO6 (s), Fe2TeO6 (s) and Ni3TeO6 (s) were synthesized by solid-state route and characterized using X-ray diffraction technique. Thermal expansion of Fe2TeO6 (s) and Ni3TeO6 (s) were studied by high temperature X-ray diffraction technique in the temperature range 298–973 K and 298–923 K, respectively. The average volume thermal expansion coefficient of Fe2TeO6 (s) and Ni3TeO6 (s) were determined to be 2.46 × 10−5 and 3.02 × 10−5 K−1, respectively. Heat capacity of Cr2TeO6 (s), Fe2TeO6 (s) and Ni3TeO6 (s) was measured, in the temperature range of 300–870 K, employing temperature modulated differential scanning calorimeter. The Gibbs energy of formation of Fe2TeO6 (s) and Ni3TeO6 (s) were measured using transpiration method. An empirical function was derived to compute enthalpy of formation of AnTeO6 (s) (where A = various elements of periodic table, n = 2, 3 or 6). Self consistent thermodynamic functions of Cr2TeO6 (s), Fe2TeO6 (s) and Ni3TeO6 (s) were calculated. The chemical potential diagrams of A–Te–O (A = Cr, Fe, Te) system were also constructed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 585, 10 June 2014, Pages 50–62
نویسندگان
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