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Thermal properties of ammonium nitrate

I. Study of the reproducibility of DTA curves in relation to modification transformation

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Abstract

The reproducibility of the DTA curves of ammonium nitrate as functions of its grain size and the atmosphere during the measurements was studied with a derivatograph. The temperatures and the areas of the peaks assigned to the modification transitions IV → III (peak 1), III → II (peak 2) and II → I (peak 3) were evaluated. It was found that for some unground samples the area of peak 2 decreases markedly. It has been verified that in an atmosphere of moist air the temperature of peak 1 is lowered. The temperatures of lumpy and loose samples do not differ appreciably. Statistical methods evidenced the mutual dependence of the areas of peaks 1 and 2. The possible causes of this are discussed.

Zusammenfassung

Die Reproduzierbarkeit der DTA-Kurven von Ammoniumnitrat in AbhÄngigkeit von der Korngrösse und der Art der AtmosphÄre wurde mittels eines Derivatographen untersucht. Es wurden Temperaturen und FlÄchen der Peaks ausgewertet, die den PhasenübergÄngen IV → III (Peak 1), III → II (Peak 2) und II → I (Peak 3) zuzuordnen sind. Es wurde festgestellt, dass die FlÄche des Peaks 2 bei einigen nicht zerkleinerten Proben wesentlich kleiner ist. Es wurde bestÄtigt, dass Peak 1 in einer AtmosphÄre von mit Wasserdampf angereicherter Luft bei niedrigeren Temperaturen auftritt. Für klumpige und pulverförmige Proben wurden keine wesentlichen Unterschiede in den Temperaturen, bei denen die Peaks auftreten, gefunden. Statistische Methoden bestÄtigten den gegenseitigen Zusammenhang der PeakflÄchen von Peak 1 und 2. Die möglichen Ursachen für diesen Befund werden diskutiert.

РЕжУМЕ

с пОМОЩьУ ДЕРИВАтОгР АФА БылА ИсслЕДОВАНА ВОспРОИжВОДИМОсть Д тА-кРИВых НИтРАтА АММОНИь В жАВ ИсИМОстИ От РАжМЕРА г РАНУл И АтМОсФЕРы. ОпРЕДЕлЕН ы тЕМпЕРАтУРы И плОЩАДИ пИкОВ Дль ФА жОВых пЕРЕхОДОВ IV → III /пИ к 1/, III → II пИк 2/ И II → I /пИк 3/. УстАНОВлЕНО, ЧтО Дль Н ЕкОтОРых НЕРАжМОлОт ых ОБРАжцОВ плОЩАДь пИкОВ 2 жАМЕтН О УМЕНьшАлАсь. пОДтВЕРжДЕНО, ЧтО В Ат МОсФЕРЕ ВлАжНОгО ВОж ДУхА, тЕМпЕРАтУРы пИкА 1 пОН ИжАУтсь. тЕМпЕРАтУРы кУскОВы х И Рыхлых ОБРАжцОВ жА МЕтНО НЕ ОтлИЧАлИсь. пОкАжАНА ВжАИМНАь жАВИсИМОсть плОЩАДЕ И пИкОВ 1 И 2. ОБсУжДЕНы В ОжМОжНыЕ пРИЧИНы ЁтОгО ФАктА.

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References

  1. M. E. Ivanov, V. M. Olevskij, N. N. Poljakov, I. I. StriŽevskij, M. L. Ferd and Ju. V. Cechanskaja, Technologija ammiacnoj selitry, Izdatelstvo “Chimija”, Moskva, 1978.

    Google Scholar 

  2. R. N. Brown and A. C. McLaren, Proc. Roy Soc. London, Ser. A 266 (1962) 329.

    Google Scholar 

  3. B. W. Lucas, M. Ahtee and A. W. Hewat, Acta Cryst., B 35 (1979) 1038.

    Google Scholar 

  4. B. W. Lucas, M. Ahtee and A. W. Hewat, Acta Cryst., B 36 (1980) 2005.

    Google Scholar 

  5. C. S. Choi and J. E. Mapes, Acta Cryst., B 28 (1972) 1357.

    Google Scholar 

  6. R. R. Sowell, M. M. Karnowsky and L. C. Walters, J. Thermal Anal., 3 (1971) 119.

    Google Scholar 

  7. O. Juoperi, Thermochim. Acta, 9 (1974) 353.

    Google Scholar 

  8. I. Konkoly-Thege, J. Thermal Anal., 12 (1977) 197.

    Google Scholar 

  9. H. Langfelderová and P. Ambrovič, Thermochim. Acta, 56 (1982) 385.

    Google Scholar 

  10. S. B. Hendricks, E. Posnjak and F. C. Kracok, J. Am. Chem. Soc., 54 (1932) 2766.

    Google Scholar 

  11. M. Kabešová, J. GaŽo, J. Jankovič and W. Waradzin, Chem. prumysl, 33 (1983) 121.

    Google Scholar 

  12. A. BlaŽek, Termická analýza (Thermal analysis), SNTL, Praha, 1972, p. 132.

    Google Scholar 

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Slovak Technical University, 812 37, Bratislava, Czechoslovakia

    E. Jóna, T. Šramko & D. Nagy

Authors
  1. E. Jóna
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  2. T. Šramko
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  3. D. Nagy
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Jóna, E., Šramko, T. & Nagy, D. Thermal properties of ammonium nitrate. Journal of Thermal Analysis 27, 37–42 (1983). https://doi.org/10.1007/BF01907319

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  • DOI: https://doi.org/10.1007/BF01907319

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