Mechanism and Kinetics Studies on Non-Isothermal Decomposition of Ludwigite in Inert Atmosphere

• Autorzy: Fu X. , Chu M. , Gao L. , Liu Z.

Identyfikatory

DOI

10.24425/123794

• Języki publikacji: EN

Abstrakty

EN

Ludwigite is the main available boron-bearing resource in China. In order to enrich the theory system and optimize its utilization processes, this paper study the mechanism and kinetics on non-isothermal decomposition of ludwigite in inert atmosphere by means of thermal analysis. Results show that, the decomposition of serpentine and szajbelyite is the main cause of mass loss in the process. At the end of decomposition, hortonolite and ludwigite are the two main phases in the sample. The average E value of structural water decomposition is 277.97 kJ/mol based on FWO method (277.17 kJ/mol based on KAS method). The results is proved to be accurate and reliable. The mechanism model function of structural water decomposition is confirmed by Satava method and Popescu method. The form of the most probable model function is G(α) = (1 – α)^–1– 1 (integral form) and f (α) = (1 – α)² (differential form), and its mechanism is chemical reaction. This is verified by the criterion based on activation energy of model-free kinetics analysis.

Słowa kluczowe

EN

ludwigite; non-isothermal decomposition; kinetics; activation energy; model function

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 3
• Strony: 1217--1224
• Opis fizyczny: Bibliogr. 26 poz., rys., tab., wykr., wzory

Twórcy

autor

Fu X.

• Northeastern University, School of Metallurgy, No. 3-11, Wenhua Road, Heping District, Shenyang, P. R. China, 110819 Shenyang, China

autor

Chu M.

• Northeastern University, School of Metallurgy, No. 3-11, Wenhua Road, Heping District, Shenyang, P. R. China, 110819 Shenyang, China

autor

Gao L.

• Northeastern University, School of Metallurgy, No. 3-11, Wenhua Road, Heping District, Shenyang, P. R. China, 110819 Shenyang, China

autor

Liu Z.

• Northeastern University, School of Metallurgy, No. 3-11, Wenhua Road, Heping District, Shenyang, P. R. China, 110819 Shenyang, China

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Uwagi

EN

1. This work is supported by Ph. D. Programs Foundation of Ministry of Education of China (No. 20100042110004) and Fundamental Research Funds for the Central University (No. N090502004 and N140206003).

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).