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experiments. Non-isothermal methods When non-isothermal methods are applied, the integration of rate equation ( Eq. 2 ) and its reordering gives place to the so-called temperature integral: 5 where, β is the

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. Flynn , JH . 1997 The Temperature Integral—its use and abuse . Thermochim Acta. 300 : 83 – 92 . 10.1016/S0040-6031(97)00046-4 . 25. Coats , AW , Redrern , JP . 1964 Kinetic

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. Flynn , JH 1997 The ‘Temperature Integral’—its use and abuse . Thermochim Acta 300 : 83 – 92 10.1016/S0040-6031(97)00046-4 . 33. Chrissafis , K 2009

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of the process could be found by Criado method. Criado and co-workers have defined the function (13) where x = E / RT ; and π ( x ) is an approximation of the temperature integral which cannot be expressed in a simple analytical form. In this

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's approximation [ 23 ] of the temperature integral. From Eq. 7 and using Doyle's approximation, the logarithm of the integrated results leads to the Flynn–Wall–Ozawa equation: (9) where α , β , A , E a , R , and T have their usual significance. Thus

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Nanocrystalline Zn0.5Ni0.5Fe2O4

Preparation and kinetics of thermal process of precursor

Journal of Thermal Analysis and Calorimetry
Authors: Wenwei Wu, Yongni Li, Kaiwen Zhou, Xuehang Wu, Sen Liao, and Qing Wang

analyzing thermogravimetric data . Bull Chem Soc Jpn . 38 : 1881 – 1886 10.1246/bcsj.38.1881 . 26. Flynn , JH . 1997 . The ‘temperature integral’—its use and abuse . Thermochim Acta . 300

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method [ 27 ] defines a function: where x = E / RT ; and π( x ) is an approximation of the temperature integral which cannot be expressed in a simple analytical form. In this study, it used the fourth rational expression of Senum and Young [ 28

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.06.016 . 32. Órfão , JJM , Martins , FG 2002 Kinetic analysis of thermogravimetric data obtained under linear temperature programming—a method based on calculations of temperature integral by interpolation . Thermochim Acta 390

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isoconversional integral linear methods are based on the following integral form of the reaction rate: where β is the heating rate, g ( α ) is the integral conversion function, and I ( E α ,T α ) represents the temperature integral. In the present article

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an approximation term of the temperature integral (a common target of numerous publications [ 42 , 85 ]). In many cases its value is simplified and even neglected, which can be visualized by simple withdrawal in front of the integral, namely

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