Strontium carbonate is decomposed upon heating to the temperature higher than 900 °C according to the following reaction, : (1) SrCO 3 (s) → 900 − 1150 ° C SrO (fcc) + CO 2 (g) The samples before and after thermal treatment were investigated by infrared spectroscopy, scanning electron microscopy and X-ray diffraction analysis. T. Katsumata, K. Maekawa, T. Ohtaki, Y. Seki, Y. Minami, H. Imagawa, and H. Fujinuma: Mater. 1423–38. 269–270, pp. Conf. $$\frac{{d\alpha }}{{dt}} = B \cdot \exp ( - \frac{E}{{RT}}) \cdot (1 - \alpha )^n $$, Anal., 1993, vol. We use cookies to help provide and enhance our service and tailor content and ads. S.A. Robbins, R.G. Copyright © 2020 Elsevier B.V. or its licensors or contributors. 23B, pp. The α→β transformation between orthorhombic (α) and hexagonal (β) polymorphs of strontium carbonate has significant effect on the behavior of SrCO3 during thermal treatment. Copyright © 2014 Elsevier Ltd and Techna Group S.r.l. © 2020 Springer Nature Switzerland AG. Both techniques as well as the calculation of theoretical activation energy (third law method) show that the transformation of α-SrCO3 to β-SrCO3 reduces the activation energy and changes the mechanism of the process. Gallagher: Thermochim. This is a preview of subscription content, log in to check access. Res. PubMed Google Scholar, Arvanitidis, I., Sichen, D., Seetharaman, S. et al. Bull., 1994, vol. 171, pp. G. Huyberechts, M. Honoré, and J. Roggen: Sensors Actuators B, 1993, vols. 777–84. West, ed., CRC Press, Boca Raton, FL, 1977, p. B-142. Article  Acta, 1995, vols. Soc., 1963, pp. on Thermal Analysis, R.F. 229–38. E.L. Charsley, C.M. All rights reserved. The thermal decomposition of strontium carbonate to produce strontium oxide and carbon dioxide. While thermal decomposition of rhombohedral SrCO3 is limited by the rate of process to the reaction interface (R3: g(α)=1−(1–α)1/3), the process limited by the rate of chemical reaction of 1/3 order (F1/3: 1−(1–α)2/3) was determined for the hexagonal polymorph. CAS  281–87. Google Scholar. Handbook of Chemistry and Physics, 58th ed., R.C. Google Scholar. The kinetics, mechanism and thermodynamics of activated complex in the process of thermal decomposition were investigated by non-isothermal thermogravimetric analysis (TGA) using mechanism-free (Kissinger equation) as well as kinetic function fitting methods. The kinetics and mechanism of thermal decomposition of SrCO. Associate Professor, Curves of calculated α vs temperature agree well with the experimental results. CAS  Division of Theoretical Metallurgy, Royal Institute of Technology, S-100 44, Stockholm, Sweden, I. Arvanitidis, Du Sichen & S. Seetharaman, Professor, 43–49. B, 1992, vol. J.M. SrCO 3 SrO + CO 2. Earnest, P.K. - Maull, and P.K. By using a nonisothermal method, the complete rate expression was determined from a relatively small number … The activation energy, E, for the decomposition of SrCO3 was evaluated to be 210 kJ/mol. mol−1, T is the temperature in kelvin, and n is a factor depending on the geometry of the particles. Article  Graduate Student, 40, pp. Du Sichen and S. Seetharaman: Metall. Subscription will auto renew annually. Criado, M.J. Dianez, M. Macias, and M.C. By continuing you agree to the use of cookies. Immediate online access to all issues from 2019. Carn, eds., Academic Press, New York, NY, 1969, pp. Part of Springer Nature. Learn more about Institutional subscriptions. Pope: Proc. Metall Mater Trans B 28, 1063–1068 (1997). E.H. Baker: J. Chem. Paradas: Thermochim. 29 (7), pp. Tax calculation will be finalised during checkout. 15–16, pp. 1415–22. The kinetics of the decomposition of SrCO3 in argon to SrO and CO2 were studied in the temperature range 1000 to 1350 K. The thermal decomposition was followed simultaneously by thermogravimetric analysis (TGA) and differential thermal analysis (DTA) during linear heating. 339–45. 2nd Int. Schucanker and P.D. Professor, Gallagher, and M.J. Richardson: J. Therm. M.D. Acta, 1990, vol. Rupard, B.J. This reaction takes place at a temperature of 1100-1200°C. Google Scholar. SrCO3 was totally decomposed to strontium oxide (SrO) and carbon dioxide (CO2) gas at 1200°C for 45min. The intrinsic thermal decomposition kinetics of SrCO3 by a nonisothermal technique. Judd and M.I., DOI:, Over 10 million scientific documents at your fingertips, Not logged in Trans. 317–24. Weddle, T.R. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. the Department of Metallurgical Engineering, University of Utah, 84112, Salt Lake City, UT, You can also search for this author in