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Research Papers

Eco-Friendly Screen-Printing Inks of Gadolinia Doped Ceria

[+] Author and Article Information
Alessandra Sanson

 Institute of Science and Technology for Ceramics (ISTEC)-CNR, Via Granarolo 64, 48018 Faenza (Ravenna), Italysanson@istec.cnr.it

Edoardo Roncari

 Institute of Science and Technology for Ceramics (ISTEC)-CNR, Via Granarolo 64, 48018 Faenza (Ravenna), Italy

Stefano Boldrini

 Insitute of Biomedical Engineering (ISIB)-CNR, Corso Stati Uniti 4, 35127 Padua, Italy

Patrizia Mangifesta

 Institute of Science and Technology for Ceramics (ISTEC)-CNR, Via Granarolo 64, 48018 Faenza (Ravenna), Italymangifesta@istec.cnr.it

Lioudmila Doubova

 Insitute for Energetics and Interphases (IENI)-CNR, Corso Stati Uniti 4, 35127 Padua, Italy

J. Fuel Cell Sci. Technol 7(5), 051013 (Jul 19, 2010) (5 pages) doi:10.1115/1.3120271 History: Received February 01, 2008; Revised March 03, 2009; Published July 19, 2010; Online July 19, 2010

Gadolina doped ceria (GDC) is a promising electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFC). Dense layers of this material can be economically deposited by screen printing. However, the inks for this technique generally use organic compounds that can raise health and safety issues, as well as economical issues. In order to obtain a low-cost alternative to the generally accepted organic-based ink, four different blends of binders were considered to prepare water-based GDC inks. The systems were deposited onto green NiO/GDC anodes produced by tape casting and treated at 1673 K for 4 h. By choosing the right combination of solvents and binders, it was possible to obtain a dense crack-free film of GDC from a water-based system.

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Figures

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Figure 1

Trend of zeta potential of GDC in water as a function of the pH

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Figure 2

Trend of zeta potential of GDC in W/PG as a function of the volume of dispersant (ml)

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Figure 3

Flow curves of the W/PG-based inks

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Figure 4

Thixotropical behavior of the inks produced

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Figure 5

Detail of Fig. 4 showing the different thixotropic behavior of the inks

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Figure 6

SEM micrographs of the film sintered at 1673 K for 4 h

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Figure 7

Green and sintered GDC film obtained from a PVP-MHEC water-based ink

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Figure 8

SEM micrograph of the half-cell after reduction

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