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JournalISSN: 1388-6150

Journal of Thermal Analysis and Calorimetry 

About: Journal of Thermal Analysis and Calorimetry is an academic journal. The journal publishes majorly in the area(s): Thermal decomposition & Differential scanning calorimetry. It has an ISSN identifier of 1388-6150. Over the lifetime, 20634 publication(s) have been published receiving 277079 citation(s).
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Journal ArticleDOI
Abstract: Spectacular technological progress has been made in the last few years through thedevelopment of new materials such as «geopolymers», and new techniques, such as «sol-gel». New state-of-the-art materials designed with the help of geopolymerization reactions are opening up new applications and procedures and transforming ideas that have been taken for granted in inorganic chemistry. High temperature techniques arc no longer necessary to obtain materials which are ceramic-like in their structures and properties

2,537 citations


Journal ArticleDOI
Abstract: Two methods of obtaining kinetic parameters from derivative thermoanalytical curves are proposed The methods are based on the general form of kinetic formulae and are applicable to general types of reactions governed by a single activation energy One method utilizes the linear relation between peak temperature and heating rate in order to estimate the activation energy, and only the information of the rate of conversion versus the temperature is necessary The other method needs the information of both the conversion and the rate of conversion versus the temperature, and the Arrhenius plot is made for an assumed kinetic mechanism

1,870 citations


Journal ArticleDOI
J. A. Augis1, J. E. Bennett1Institutions (1)
Abstract: Several isothermal experiments are generally needed to determine the parameters of the Avrami equation which describe most of the heterogeneous solid state reactions. Differential scanning calorimeters are suitable for such experiments. While most differential thermal analysis (DTA) apparatus cover a wider temperature range than DSC apparatus they cannot be used to perform isothermal determinations. However, Kissinger has already shown how activation energy and frequency factor can be calculated from DTA experiments for the case of homogeneous reactions following first order kinetics. We derive in this paper an extension of the Kissinger method and show its applicability to heterogeneous reactions described by an Avrami expression. The new method will allow the study of the kinetics of metallic reactions at the higher temperature range obtainable with DTA. The transformation kinetics of the metastable equiatomic tin-nickel alloy are given as an example.

960 citations


Journal ArticleDOI
G. I. Senum1, Ralph T. Yang1Institutions (1)
TL;DR: Rational approximations have been derived for the integral of the Arrhenius function dT which is important in the kinetic analysis of thermogravimetric data and is found to be equivalent to the Gorbachev approximation.
Abstract: Rational approximations have been derived for the integral of the Arrhenius function $$\int\limits_0^T {\exp ( - E/RT)}$$ dT which is important in the kinetic analysis of thermogravimetric data. The first degree rational approximation is found to be equivalent to the Gorbachev approximation, i.e., RT2 exp (−E/RT)/(E+2RT). The second degree rational approximation is more accurate than the Zsako empirical approximation when E/RT 5. The third and higher degree rational approximations are found to be more accurate than any other previous approximation.

622 citations


Journal ArticleDOI
Abstract: Spectacular technological progress has been made in the last few years through the development of new materials such as ‘geopolymers’, and new techniques, such as ‘sol-gel’. New state-of-the-art materials designed with the help of geopolymerisation reactions are opening up new applications and procedures and transforming ideas that have been taken for granted in inorganic chemistry. High temperature techniques are no longer necessary to obtain materials which are ceramiclike in their structures and properties. These materials can polycondense just like organic polymers, at temperatures lower than 100 deg. C. This new generation of materials, whether used pure, with fillers or reinforced, is already finding applications in all fields of industry. Some examples: pure: for storing toxic chemical or radioactive waste, etc. filled: for the manufacture of special concretes, molds for molding thermoplastics, etc. reinforced: for the manufacture of molds, tooling, in aluminum alloy foundries and metallurgy, etc.

588 citations


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Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
20211,512
20201,046
20191,073
2018884
2017863
2016782