Please use this identifier to cite or link to this item: http://repositorio.ufpa.br:8080/jspui/handle/2011/6614
Title: Síntese e caracterização de argila esmectita Zn-estevensita
Other Titles: Synthesis and characterization of smectite clay Zn-stevensite
metadata.dc.creator: HILDEBRANDO, Edemarino Araujo
VALENZUELA, Maria das Graças da Silva
NEVES, Roberto de Freitas
DIAZ, Francisco Rolando Valenzuela
Keywords: Síntese
Esmectita
Argila sintética
Estevensita
Issue Date: Jun-2014
Citation: HILDEBRANDO, E. A. et al. Síntese e caracterização de argila esmectita Zn-estevensita. Cerâmica, São Paulo, v. 60, n. 354, p. 273-278, abr./jun. 2014. Disponível em: <http://www.scielo.br/pdf/ce/v60n354/a17v60n354.pdf>. Acesso em: 28 abr. 2015. <http://dx.doi.org/10.1590/S0366-69132014000200017>.
Abstract: Clay of the smectite group was successfully obtained at a low temperature hydrothermal processing using sodium metasilicate, zinc nitrate and urea as precursor materials. During the synthesis step, the molar composition of the mixture and the temperature remained constant varying the reaction time. The synthesized samples were characterized by X-ray diffraction, scanning electron microscopy, diffuse reflectance Fourier Transform infrared spectroscopy, differential thermal analysis and thermogravimetry, cation exchange capacity (CEC) and BET surface area measurements. The results show that in the methodology utilized is obtained Zn-stevensite with specific surface area of 171.6-203.4 m2/g and good crystallinity as present single phase in the reaction product after static synthesis at 90 ºC for 44 to 138 h, indicating that, the increased synthesis time is an important parameter for crystallization process of the clay.
URI: http://repositorio.ufpa.br/jspui/handle/2011/6614
ISSN: 0366-6913
Appears in Collections:Artigos Científicos - FEQ/ITEC

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