Polarization and depolarization currents in kaolin

Ondruška, Ján; Štubňa, Igor; Trnovcová, V.; Medveď, Igor; Kaljuvee, Tiit

doi:10.1016/j.clay.2015.05.022

Applied Clay Science

2015

DOI: 10.1016/j.clay.2015.05.022

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Polarization and depolarization currents in kaolin

Ján Ondruška

Igor Štubňa

V. Trnovcová

et al.

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Cited by 8 publications

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“…During heating, in the temperature interval of 450-700 °C, thermal decomposition of kaolinite (dehydroxylation) occurs and can be described according to the equation (Heide and Földvari, 2006;Ondruška et al, 2015;Ptáček et al, 2010bPtáček et al, , 2011:…”

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confidence: 99%

Non-Isothermal Kinetic Analysis of the Dehydroxylation of Kaolinite in Dynamic Air Atmosphere

Ondro

Húlan

Vitázek

2017

Acta Technologica Agriculturae

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A non-isothermal kinetic analysis of kaolinite dehydroxylation was carried out using thermogravimetric analysis on powder samples with heating rates from 1 to 30 °C・min-1 in a dynamic air atmosphere. The mechanism of the reaction, values of overall activation energy and pre-exponential factor were determined from a series of thermogravimetric experiments by the Coats- Redfern method. The results show that the dehydroxylation of kaolinite is controlled by the rate of the third-order reaction (F3) with the mean values of overall activation energy (EA) 255 kJ・mol-1 and pre-exponential factor (A) 25.56 × 1014 s-1.

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mentioning

confidence: 99%

Non-Isothermal Kinetic Analysis of the Dehydroxylation of Kaolinite in Dynamic Air Atmosphere

Ondro

Húlan

Vitázek

2017

Acta Technologica Agriculturae

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Depolarization currents in illite

Ondruška

Trnovcová

Štubňa

et al. 2017

J Therm Anal Calorim

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Polarization currents in illite at various temperatures

Ondruška

Štubňa

Trnovcová

et al. 2017

Applied Clay Science

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Polarization and depolarization currents in kaolin

Cited by 8 publications

References 12 publications

Non-Isothermal Kinetic Analysis of the Dehydroxylation of Kaolinite in Dynamic Air Atmosphere

Non-Isothermal Kinetic Analysis of the Dehydroxylation of Kaolinite in Dynamic Air Atmosphere

Depolarization currents in illite

Polarization currents in illite at various temperatures

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