Pulsed thermal treatment of carbon up to 3000 °C using an atomic absorption spectrometer

An atomic absorption spectrometer unit fitted with a graphite furnace module is used to perform high temperature treatment on three carbonized polymers: polyvinyl chloride (PVC), polyvinylidene chloride (PVDC) and polyacrylonitrile (PAN). Using short pulses up to 45 s, we heat small samples to a max...

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Veröffentlicht in:Carbon (New York) 2018-08, Vol.135, p.157-163
Hauptverfasser: Putman, K.J., Sofianos, M.V., Rowles, M.R., Harris, P.J.F., Buckley, C.E., Marks, N.A., Suarez-Martinez, I.
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Sprache:eng
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Zusammenfassung:An atomic absorption spectrometer unit fitted with a graphite furnace module is used to perform high temperature treatment on three carbonized polymers: polyvinyl chloride (PVC), polyvinylidene chloride (PVDC) and polyacrylonitrile (PAN). Using short pulses up to 45 s, we heat small samples to a maximum of 3000 °C. High-resolution transmission electron microscopy and X-ray diffractometry are used to track the growth of crystallites in the materials as a function of the heating temperature. We observe the well-known behaviour of large crystalline graphite growth in PVC-derived samples and the formation of curved graphitic layers in PVDC- and PAN-derived samples. This graphite furnace atomic absorption spectrometer approach is an attractive alternative to conventional laboratory-scale graphite furnaces in research of high temperature treatment of carbon and other refractory materials. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2018.03.060