Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method
The kinetics of crystallization of Pb15Ge27Se58 was studied by differential scanning calorimetry non-isothermally. Various experimental methods are currently employed for determining the kinetic parameters of crystallization in a glassy system. These parameters include the activation energy of cryst...
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| Format: | Article |
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2010
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| author | El-Raheem, M.M.A. Ali, Hapipah Mohd |
| author_facet | El-Raheem, M.M.A. Ali, Hapipah Mohd |
| author_sort | El-Raheem, M.M.A. |
| collection | UM |
| description | The kinetics of crystallization of Pb15Ge27Se58 was studied by differential scanning calorimetry non-isothermally. Various experimental methods are currently employed for determining the kinetic parameters of crystallization in a glassy system. These parameters include the activation energy of crystallization E (kJ/mol), the kinetic exponent n and the frequency factor K-o (s(-1)). Recently, a new method (VHR method) has been derived from Johnson-Mehl-Avrami (JMA) transformation rate equation to calculate - in sequence - the crystallization kinetic parameters of a glassy system. The VHR technique has been used to estimate the crystallization parameters of Pb15Ge27Se58 chalcogenide glass under non-isothermal conditions. The average value of E, n and K-o are found equal to 181.74 +/- 0.58 (kJ/mol), 1.085 +/- 0.023 and (9.196 +/- 0.716) x 10(12) (s(-1)), respectively. The kinetic exponent, n approximate to 1 indicates a surface nucleation mechanism. (C) 2009 Elsevier B.V. All rights reserved. |
| first_indexed | 2024-03-06T05:14:05Z |
| format | Article |
| id | um.eprints-5316 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:14:05Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | um.eprints-53162019-01-29T09:12:24Z http://eprints.um.edu.my/5316/ Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method El-Raheem, M.M.A. Ali, Hapipah Mohd QD Chemistry The kinetics of crystallization of Pb15Ge27Se58 was studied by differential scanning calorimetry non-isothermally. Various experimental methods are currently employed for determining the kinetic parameters of crystallization in a glassy system. These parameters include the activation energy of crystallization E (kJ/mol), the kinetic exponent n and the frequency factor K-o (s(-1)). Recently, a new method (VHR method) has been derived from Johnson-Mehl-Avrami (JMA) transformation rate equation to calculate - in sequence - the crystallization kinetic parameters of a glassy system. The VHR technique has been used to estimate the crystallization parameters of Pb15Ge27Se58 chalcogenide glass under non-isothermal conditions. The average value of E, n and K-o are found equal to 181.74 +/- 0.58 (kJ/mol), 1.085 +/- 0.023 and (9.196 +/- 0.716) x 10(12) (s(-1)), respectively. The kinetic exponent, n approximate to 1 indicates a surface nucleation mechanism. (C) 2009 Elsevier B.V. All rights reserved. 2010 Article PeerReviewed El-Raheem, M.M.A. and Ali, Hapipah Mohd (2010) Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method. Journal of Non-Crystalline Solids, 356 (2). pp. 77-82. ISSN 0022-3093, DOI https://doi.org/10.1016/j.jnoncrysol.2009.10.010 <https://doi.org/10.1016/j.jnoncrysol.2009.10.010>. http://ac.els-cdn.com/S0022309309006905/1-s2.0-S0022309309006905-main.pdf?_tid=71bf72fc-2ca9-11e2-9d73-00000aacb361&acdnat=1352711884_3f1ef0f8b647139ff47de017218aa3bd 10.1016/j.jnoncrysol.2009.10.010 |
| spellingShingle | QD Chemistry El-Raheem, M.M.A. Ali, Hapipah Mohd Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method |
| title | Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method |
| title_full | Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method |
| title_fullStr | Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method |
| title_full_unstemmed | Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method |
| title_short | Crystallization kinetics determination of Pb15ge27se58 chalcogenide glass by using the various heating rates (VHR) Method |
| title_sort | crystallization kinetics determination of pb15ge27se58 chalcogenide glass by using the various heating rates vhr method |
| topic | QD Chemistry |
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