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Processing and Characterization of ZrO2-TiO2 Porous Films by Dip Coating for Application as Environmental Sensors
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Processing and Characterization of ZrO2-TiO2 Porous Films by Dip Coating for Application as Environmental Sensors

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Abstract:

The main objective of this work is to study and characterize porous ZrO2-TiO2 films on alumina substrates that will be used for the production of porous ceramic sensors for the monitoring of air humidity in environments subject to the incidence of solar radiation. For the production of the films the dip coating technique was adopted. A viscosity study was performed to obtain stable suspensions of ZrO2-TiO2 in isopropyl alcohol with the para-aminobenzoic acid deflocculant (PABA), at concentrations of 10, 12.5 and 15% by weight of solids. X-ray diffraction (XRD) characterizations were performed for the identification of crystalline phases, morphological analyzes by scanning electron microscopy (SEM) and chemical analyzes by energy dispersive X-ray spectroscopy (EDS). The results allowed to determine the minimum value of viscosity and amount of deflocculant to stabilize the suspension. The sensor elements in the form of 1:1 (weight) ZrO2 - TiO2 porous films showed great potential to be used as sensors for the measurement of relative humidity the size and distribution of desirable pores in the porous film for application as moisture sensors was obtained with 12.5 and 15 % by weight ZrO2-TiO2

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22nd Brazilian Conference on Materials Science and Engineering View Preview

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Periodical:

Materials Science Forum (Volume 930)

Pages:

631-636

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.930.631

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Online since:

September 2018

Authors:

Silvelene Alessandra Silva, Sérgio Luiz Mineiro, Rodrigo Matos Oliveira, Maria do Carmo Andrade Nono

Keywords:

Deflocculant, Porous Ceramic Films, Sensors, Viscosity

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] B.C. Carter, N.M. Grant: Ceramic Materials: Science and Engineering. (Springer Publ., New York, 2007).

Google Scholar

[2] A Noni Jr., D.E. Garcia, D.A Hotza: Modified model for the viscosity of ceramic suspensions. Ceramics International Vol. 28 (7) (2002), p.731.

DOI: 10.1016/s0272-8842(02)00035-4

Google Scholar

[3] D. Hotza: Cerâmica Vol. 43 (7) (1997), p.157.

Google Scholar

[4] I.R. Oliveira, A.R. Stuart, R.G. Pileggi, V.C. Pandofelli: Particle Dispersion and Packaging: Principles and Applications in Ceramic Processing. (São Paulo, SP 2000).

Google Scholar

[5] F.S. Ortega, J.A. Pandofelli: Industrial Vol. 2 (5) (1997), p.34.

Google Scholar

[6] D.R. Denger: Rheology for Ceramists. (Clemsom: Dinger Ceramic Consulting Services, 2002).

Google Scholar

[7] C.M. Gomes, L.V. Amorim, H.C. Ferreira: Influence of stirring speed on the rheology of dispersions of bentonite clays. Jornadas SAM (2001), p.827.

Google Scholar

[8] Brookfield Engineering Laboratories, More Solutions to Sticky Problems-A/guide to getting more from your Brookfield viscometer. http://www.brookfield engineering.com.htm.

Google Scholar