Authors:C. Păcurariu, R. I. Lazău, I. Lazău, D. Tiţa, and A. Dumitrel
the melt viscosity, which determine hematite proportion and the size of the developing crystals.
This article focuses on the kinetics study of the hematite crystallization in an aventurine glaze. The apparent activationenergy, as a function of
Authors:Mourad Ibrahim Daoudi, Abdelhafid Triki, and Abdelkrim Redjaimia
for solid-state phase transformation are the activationenergy ( Q α ), and the growth exponent ( n ). The determination of these two parameters and their evolution with respect to time and temperature is of great importance to understand the phase
Authors:Nagarajan David Mathan, Mahendran Arunjunairaj, Thangamani Rajkumar, Durairaj Ponraju, and Chinnaswamy Thangavel Vijayakumar
containing compounds and this has been reported in the literature [ 11 – 13 ].
The thermal stability of the compound PEPA is an important factor as it decides the processing and application ranges. The calculation of activationenergy for degradation
two stages—in the first stage, only the zeolitic waters are removed, by a diffusion mechanism, while in the second stage the strongly bonded water molecules are dehydrated. They estimated the values of activationenergy and its dependence on the
where A is the pre-exponential factor, E is the activationenergy, and R is the gas constant. For experiments carried out at a constant heating rate the explicit dependence on time of Eq. 1 can be eliminated with
where β ≡ d T /d t
Authors:D. Bhattacharjya, T. Selvamani, and Indrajit Mukhopadhyay
controlled hydrothermal and simple precipitation process using MgCl 2 precursor [ 28 , 29 ]. The kinetic parameters were deduced by the model-free Friedman isoconversion and Flynn–Wall method. The dependence of the activationenergy on the morphology is
activationenergy, R is the gas constant, and T is the absolute temperature.
Selecting n th order reaction model in the light of a previously accomplished kinetics study of pistachio shell in the literature [ 23 ], and rearranging, Eq. 3
Authors:Saheli Ganguly, Kausik Dana, Tapas Kumar Mukhopadhyay, and Sankar Ghatak
series of Ca-smectites and concluded that dehydration followed a first-order reaction with activationenergy values ranging from 39.8 to 52.3 kJ mol −1 . Furthermore, Guler and Sarier [ 29 ] arrived at a value of 14.72 kJ mol −1 for a similar type of
Authors:Qinghong Kong, Yuan Hu, Lei Song, and Yuwen Tang
) analysis. According to the TG data, the kinetic parameters of thermal decomposition of materials such as apparent activationenergy ( E a ), pre-exponential factor ( A ), and apparent reaction order ( n ) can be calculated using various kinetic models such
Authors:Eda Elmas, Kenan Yildiz, Nil Toplan, and H. Özkan Toplan
investigated the kinetics of mullitization, all reporting that mullitization occurs by nucleation-growth mechanisms. Okada [ 3 ] summarized the activationenergy values for mullitization from various starting materials (such as diphasic gel, monophasic gel