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Wyszukujesz frazę "64.60.A-" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Influence of the Introduction of Copper into Amorphous $As_2Se_3$ Matrix on Its Thermal and Structural Characteristics
Autorzy:
Štrbac, G.
Lukić-Petrović, S.
Štrbac, D.
Čajko, K.
Turyanytsa, I.
Powiązania:
https://bibliotekanauki.pl/articles/1399717.pdf
Data publikacji:
2013-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.kj
64.70.P-
65.60.+a
Opis:
This paper describes the results of the determination of some thermal and structural parameters of glasses from the $Cu_{x}(As_2Se_3)_{100-x}$ system for x=0, 1, 5, 10 and 15 at.%. Based on the differential scanning calorimetry curves taken at different heating rates, glass transition temperature $T_{g}$, onset temperature of crystallization $T_{onset}$, and melting temperature $T_{m}$ of crystalline units formed are determined. The values of activation energy $E_{g}$ of glass transition process are calculated. These characteristic temperatures served as the basis for the calculation of the parameters of thermal stability of the glasses towards crystallization.
Źródło:
Acta Physica Polonica A; 2013, 123, 2; 256-258
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements
Autorzy:
Čajko, K.
Lukić-Petrović, S.
Štrbac, G.
Ivetić, T.
Powiązania:
https://bibliotekanauki.pl/articles/1398711.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
65.60.+a
64.70.kj
64.70.P-
64.70.kg
Opis:
Thermal properties of glasses from the system $Ag_x(As_{40}S_{30}Se_{30})_{100-x}$ for x=0, 0.5, 1, 3, and 5 at.% were investigated by differential scanning calorimetry. The DSC curves were obtained under non-isothermal conditions which allowed determination of the glass transition temperature $T_{g}$ (onset temperature), crystallization temperature $T_{p}$ (corresponding to the crystallization peak maximum), melting temperature $T_{m}$, crystallization enthalpy $H_{c}$, and melting enthalpy $H_{m}$. The DSC curves obtained at the same heating rate were analyzed in order to study the variation of glass transition temperature with Ag concentration. Observed $T_{g}$ shift toward higher values, with increase in the heating rate, is in agreement with the Lasocka equation. Samples with 3 at.% and 5 at.% Ag were further thermally treated at different heating rates with the aim of analyzing kinetic processes of crystallization. The Moynihan and Kissinger models were used to calculate the activation energy of glass transition and activation energy of crystallization. For the samples that showed the crystallization processes an assessment of the thermal stability was done based on different criteria.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 509-513
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solid State Polymorphism and Dynamics οf 2,2-Dimethylbutan-1-ol as Studied by Adiabatic Calorimetry and Dielectric Spectroscopy
Autorzy:
Juszyńska-Gałązka, E.
Zieliński, P.
Massalska-Arodź, M.
Krawczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/1399009.pdf
Data publikacji:
2013-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
65.60.+a
77.22.Gm
64.70.P-
Opis:
2,2-dimethylbutan-1-ol, known as neohexanol, was studied by adiabatic calorimetry and dielectric spectroscopy. Details of complex solid state polymorphism and relaxational dynamics were identified and described. System of phases of neohexanol was found to be monotropic with three orientationally disordered crystalline phases besides isotropic liquid and ordered crystal. Moreover, two subsequent glass transition anomalies of heat capacity $C_{p}(T)$ were detected on heating in one of the supercooled orientationally disordered crystalline phases. Thermodynamical properties of neohexanol are described in relation to the dielectric relaxation processes found.
Źródło:
Acta Physica Polonica A; 2013, 124, 6; 917-925
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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