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High-temperature reactions in systems of interest for spectrochemical analysis

II. Reactions between graphite and oxides of magnesium, silicon, vanadium and aluminium

Hochtemperaturreaktionen in spektralanalytisch wichtigen Systemen

II. Reaktionen von Graphit mit den Oxiden von Magnesium, Silicium, Vanadium und Aluminium

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Summary

Reactions between graphite and magnesium, silicon, vanadium and aluminium oxides in graphite electrodes have been investigated by spectrochemical and X-ray diffraction methods. Samples were ignited by means of an evaporator up to controlled temperatures. In the range of 1000–1900°C magnesium oxide does not react with graphite. Aluminium trioxide first forms γ-Al2O3 and at 1900°C Al4C3. Silicon dioxide forms silicon carbide at about 1400°C. Vanadium pentoxide is first reduced to VO2 and than at higher temperatures (1200° C) forms γ-VC. At about 1400° C MgO and SiO2 mixed with graphite powder form magnesium silicate, Mg2SiO4, and this silicate was stable at higher temperatures (up to 2000°C).

Zusammenfassung

Die Reaktionen wurden durch Spektralanalyse und Röntgendiffraktometrie untersucht. Die Proben wurden in einem Evaporator auf kontrollierte Temperaturen erhitzt. Im Bereich von 1000–1900° C reagiert MgO nicht mit Graphit. Al2O3 bildet zunächst γ-Al2O3 und bei 1900°C Al4C3. SiO2 bildet bei etwa 1400°C SiC. V2O5 wird zunächst zu VO2 reduziert und geht dann bei höheren Temperaturen (1200°C) in γ-VC über. MgO und SiO2 im Gemisch mit Graphit bilden Mg2SiO4, das bei hohen Temperaturen (bis 2000°C) noch beständig ist.

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References

  1. Cox, J. A., and L. M. Pidgeon: Canad. J. Chem. 41, 671 (1963).

    Article  CAS  Google Scholar 

  2. Geld, P. V., and O. A. Essin: Processi Visokotemperaturnogo vostanovlenija. Ed. Metallurgizdat. Moskava 1957.

  3. Komarek, K. L., A. Coucoulas, and M. Klinger: J. Electrochem. Soc. 110, 783 (1963).

    Article  CAS  Google Scholar 

  4. Leuchs, O.: Spectrochim. Acta 4, 237 (1950).

    Article  CAS  Google Scholar 

  5. Moisan, A.: Compt. Rend. 116, 1225 (1893).

    Google Scholar 

  6. Nickel, H.: Spectrochim. Acta 23B, 323 (1968).

    Article  Google Scholar 

  7. Oya, L., and H. Osava: J. Study Metals 4, 434 (1928).

    Google Scholar 

  8. Rajič, S.: Z. Anal. Chem. 246, 111 (1969).

    Article  Google Scholar 

  9. Vladimirov, L. P.: Uskorenie metodi termodinamičeskih reakcii. Ed. Lvovskogo Gosudarstv. Universiteta 1956.

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Authors and Affiliations

  1. Institute for Technology of Nuclear Raw Materials, Beograd, Yugoslavia

    Srbobran Rajić

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  1. Srbobran Rajić
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Rajić, S. High-temperature reactions in systems of interest for spectrochemical analysis. Z. Anal. Chem. 246, 181–183 (1969). https://doi.org/10.1007/BF00454712

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  • DOI: https://doi.org/10.1007/BF00454712

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