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vol.47 número303Cerâmicas eletrônicas à base de SnO2 e TiO2Tratamento para obtenção de TaC em superfície de grafite. Parte II: eletrodeposição em meio de fluoretos fundidos índice de autoresíndice de assuntospesquisa de artigos
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Cerâmica

versão impressa ISSN 0366-6913versão On-line ISSN 1678-4553

Resumo

IZARIO Fº, H. J. et al. TaC formation on graphite surface. Part I: Immersion in aqueous solution of TaF72-. Cerâmica [online]. 2001, vol.47, n.303, pp.144-148. ISSN 0366-6913.  http://dx.doi.org/10.1590/S0366-69132001000300003.

The atomic absorption spectrometry with electrothermal atomization in graphite oven, as an analytical method, possesses a great advantage of high sensibility detection; due to this advantage, it has been largely accepted as an analytical routine in application and research laboratories. In spite of its large detection power, the application of this methodology is limited by the operation cost and by the chemical interaction of some elements with the graphite tube surface. This work presents the methodologies of formation of tantalum carbide in the surface of graphite tubes by immersion of the graphite tube in aqueous solution of TaF72-. The samples obtained following this methodology were thermally treated in order to obtain the tantalum carbide. The homogeneity of the formed layers and their morphologies were characterized by scanning electron microscopy; the formation of tantalum carbide was confirmed by X-ray diffraction.

Palavras-chave : tantalum carbide; graphite; electrodeposition.

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