Invertis Journals of Science & Technology

Open Access Open Access  Restricted Access Subscription Access

Thermal Decomposition Studies of CrxMo1-xSe2 (x=0.25, 0.50, 0.75) Single Crystals


Affiliations
1 S.S. Agrawal College of Arts, Commerce and Management, Navsari, Veer Narmad South Gujarat University-396445, Gujarat, India
2 Laxmi Institute of Technology, Sarigam, Gujarat Technological University-396155, Gujarat, India
3 Department of Physics, Sardar Patel University, Vallabh Vidyanagar-388120, Gujarat, India
 

The thermal behavior of some mixed transition metal dichalcogenides CrxMo1-xSe2 (x=0.25, 0.50, 0.75) were investigated using different thermal techniques. These include thermogravimetry (TGA), derivative thermogravimetry (DTG) and differential thermal analysis (DTA). The thermogravimetry data allowed the determination of activation energy and frequency factor. The relative thermal stabilities of the studied compounds have been evaluates in terms of composition (x) and follow the order 0.25>0.50>0.75. The DTA pattern shows a strong endothermic transition around 550K. The different kinetic parameters: entropy, enthalpy and Gibbs free energy were evaluated using Piloyan-Novikova and Coats-Redfern relations.

Keywords

Chalcogenides, Single Crystals, Thermal Analysis, Thermogravimetry (TGA).
User
Notifications
Font Size

  • B.A. Ridley, B. Nivi and J.M. Jacobson, Science 286, (1999) 746.

  • P.K. Gallagher, J. Thermal Analysis and Calorimetry, 25(1), (1982) 7-20.

  • E.B. Michel, Handbook of Thermal Analysis: Principles & Practice. New York: Elsevier Publication, (1998) 509.

  • K.H. Ohrbach, G. Radhoff and A. Kettrup, Thermochimica Acta, 67(2-3), (1983) 189-195.

  • S. Vyazovkin and C.A. Wight, International Reviews in Physical Chemistry, 17(3), (1998) 407-433.

  • H.H. Horowitz and G. Metzger, Analytical Chemistry, 35(10), (1963) 1464-1468.

  • W.W. Wendlandt, Thermal Methods of Analysis. New York: Interscience Publishers, (1964).

  • R.O. Macˆedo, A.G. de Souza and A.M.C. Macedo, J. Thermal Analysis, 49(2), (1997), 937-941.

  • B. Wunderlich, Thermal Analysis, Academic Press, New York, NY, USA, (1990).

  • T.C. Daniels. Thermal Analysis, John Wiley & Sons, NewYork (1973).

  • W.W. Wendlandt. Themal Methods of Analysis, Interscience Publishers, New York (1964).

  • C. Duval, Inorganic Thermogravimetric Analysis, Elsevier, New York (1963).

  • C.J. Keattch. An Introduction to Thermogravimetry, Dollimore, Heyden & Son Ltd., England (1975).

  • M.E. Brown. Introduction to Thermal Analysis, Kluwer Academic Publisher, London (2001).

  • R.A. Meyers. Encyclopedia of Analytical Chemistry, John Wiley & Sons Ltd., Chichester (2000).

  • P.J. Haines. Principles of Thermal Analysis & Calorimetry, Royal Society of Chemistry, Cambridge (2002).

  • C.M. Earnest. Compositional Analysis by Thermogravimetry, American Society for Testing and Materials, Philadelphia (1988).

  • P.D. Garn, Thermoanalytical Methods of Investigations, Academic Press, New York (1965).

  • Priyanka Desai, D.D. Patel and A.R. Jani, J. Cryst. Growth, 390, (2014) 12-17.

  • D. Dollimore, Thermochimica Acta, 340, (1999) 183-194.

  • D.D. Patel, Priyanka Desai and A.R. Jani, J. Cryst. Growth, 400, (2014) 43-48.

  • F. Yakuphanoglu, A.O. Gorgulu and A. Cukurovali, Physica B, 353, (2004) 223-229.


Abstract Views: 453

PDF Views: 1




  • Thermal Decomposition Studies of CrxMo1-xSe2 (x=0.25, 0.50, 0.75) Single Crystals

Abstract Views: 453  |  PDF Views: 1

Authors

Priyanka Desai
S.S. Agrawal College of Arts, Commerce and Management, Navsari, Veer Narmad South Gujarat University-396445, Gujarat, India
D. D. Patel
Laxmi Institute of Technology, Sarigam, Gujarat Technological University-396155, Gujarat, India
A. R. Jani
Department of Physics, Sardar Patel University, Vallabh Vidyanagar-388120, Gujarat, India

Abstract


The thermal behavior of some mixed transition metal dichalcogenides CrxMo1-xSe2 (x=0.25, 0.50, 0.75) were investigated using different thermal techniques. These include thermogravimetry (TGA), derivative thermogravimetry (DTG) and differential thermal analysis (DTA). The thermogravimetry data allowed the determination of activation energy and frequency factor. The relative thermal stabilities of the studied compounds have been evaluates in terms of composition (x) and follow the order 0.25>0.50>0.75. The DTA pattern shows a strong endothermic transition around 550K. The different kinetic parameters: entropy, enthalpy and Gibbs free energy were evaluated using Piloyan-Novikova and Coats-Redfern relations.

Keywords


Chalcogenides, Single Crystals, Thermal Analysis, Thermogravimetry (TGA).

References