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Characterization of gypsum using TMDSC

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Abstract

Gypsum is a dihydrated calcium sulfate, with the composition of CaSO4⋅2H2O, with large application interest in ceramic industry, odontology, sulfuric acid production, cement, paints, etc. During calcination, a phase transformation is observed associated to the loss of water, leading to the formation of gypsum or anhydrite, which may present different phases. The identification of the phases is not so easy since their infrared spectra and their X-ray diffraction patterns are quite similar. Thus, in this work, temperature modulated differential scanning calorimetry (TMDSC) was used to identify the different gypsum phases, which can be recognized by their different profiles.

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Authors and Affiliations

  1. Laboratório de Termoquímica e Materiais, Departamento de Química, CCEN, Universidade Federal da Paraíba, João Pessoa, Brazil, 58059-900, PB, Campus I

    H. F. Dantas, R. A. S. Mendes, L. E. B. Soledade, A. G. Souza & Iêda M. G. Santos

  2. Departamento de Química Fundamental/Central Analítica, Universidade Federal de Pernambuco, Recife, Brazil, 50740-540, PE

    R. D. Pinho & M. O. E. Schwartz

  3. Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Norte, Natal, Brazil, 59072-970, RN, Campus Universitário

    C. A. Paskocimas

  4. Laboratório de Materiais e Estruturas, Departamento de Engenharia Civil, CT, Universidade Federal da Paraíba, João Pessoa, Brazil, 58059-900, PB, Campus I

    B. B. Lira

Authors
  1. H. F. Dantas
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  2. R. A. S. Mendes
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  3. R. D. Pinho
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  4. L. E. B. Soledade
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  5. C. A. Paskocimas
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  6. B. B. Lira
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  7. M. O. E. Schwartz
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  8. A. G. Souza
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  9. Iêda M. G. Santos
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Correspondence to H. F. Dantas.

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Dantas, H.F., Mendes, R.A.S., Pinho, R.D. et al. Characterization of gypsum using TMDSC. J Therm Anal Calorim 87, 691–695 (2007). https://doi.org/10.1007/s10973-006-7733-9

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  • DOI: https://doi.org/10.1007/s10973-006-7733-9

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