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Journal of thermal analysis

, Volume 37, Issue 5, pp 927–934 | Cite as

Differential thermal analysis for estimation of the thermal stability of NPK fertilizers

  • K. Tynsuaadu
  • L. Viisimaa
Article

Abstract

The thermal decomposition of NPK fertilizers was studied by thermal analysis under dynamic and quasi-isothermal-quasi-isobaric conditions in open and labyrinth crucibles.

It was found that under quasi-equilibrium conditions, the thermal analysis reveals mainly decomposition processes. The thermal stability of NPK fertilizers is characterized by the temperature of beginning of the spontaneous exothermic decomposition, at 180–190‡.

Keywords

Polymer Physical Chemistry Inorganic Chemistry Thermal Stability Thermal Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Zusammenfassung

Mittels Thermoanalyse unter dynamischen und quasi-isothermen-quasi-isobaren Bedingungen in offenen und Labyrinthtiegeln wurde die thermische Zersetzung von NPK-Düngern untersucht.

Man fand, da\ die wichtigsten Zersetzungsprozesse durch die Thermoanalyse unter quasi-Gleichgewichtsbedingungen charakterisiert werden. Die thermische StabilitÄt von NPK-Düngern wird durch die Temperatur gekennzeichnet, bei der eine spontane exotherme Zersetzung einsetzt (180–190‡C).

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References

  1. 1.
    Yu. Rubtsov, Zh. Prikl. Khim., 4 (1987) 713.Google Scholar
  2. 2.
    G. Manelis, Yu. Rubtsov and A. Raevskii, Fiz. Goren. Vzryva, 6 (1970) 3.Google Scholar
  3. 3.
    L. Meshalkina, Khim. Prom., 1 (1989) 29.Google Scholar
  4. 4.
    F. Paulik and J. Paulik, Thermochim. Acta, 100 (1986) 23.Google Scholar
  5. 5.
    A Keenan and B. Dimitriades, J. Chem. Phys, 37 (1962) 1583.Google Scholar

Copyright information

© Wiley Heyden Ltd., Chichester and Akadémiai Kiadó, Budapest 1991

Authors and Affiliations

  • K. Tynsuaadu
    • 1
  • L. Viisimaa
    • 1
  1. 1.Tallinn Technical UniversityTallinnEstonia

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