Yttria-stabilized zirconia closed end tubes prepared by electrophoretic deposition

Abstract The electrophoretic deposition technique was used for the preparation of ZrO 2 :8 mol% Y 2 O 3 (yttria-stabilized zirconia, 8YSZ) closed end tubes for application in high temperature oxygen sensing devices. The 8YSZ ceramic suspensions with different average particle sizes were investigated looking for the best conditions for electrophoretic deposition of thin wall closed end ceramic tubes. High deposition rate of the ceramic particles onto graphite were obtained with isopropanol as solvent and 4-hydroxybenzoic acid as dispersant, with good surface quality of the deposited layer. The green tubes were dried and sintered at 1500 °C, and their properties were analyzed by X-ray diffraction for determination of the structural phases, scanning probe microscopy for observation of grain morphology, and impedance spectroscopy for evaluation of the oxide ion electrical resistivity. Pt/YSZ tube/Pt electrochemical cells were assembled for exposure to oxygen in the 60–650 ppm range using an electrochemical YSZ oxygen pump and sensor system. The signal response of the electrophoretic deposited sensor was similar to the response of the sensor of the oxygen pump. Several thin wall 4 mm diameter × 30 mm length closed end tubes may be obtained in a single operation, showing the ability of this technique for processing large quantities of tubular solid electrolytes with electrical properties suitable for use in high temperature devices.

[1]  R. G. Pileggi,et al.  Dispersão e empacotamento de partículas: Princípios e aplicações em processamento cerâmico , 2000 .

[2]  Y. Sakka,et al.  Bubble‐Free Aqueous Electrophoretic Deposition (EPD) by Pulse‐Potential Application , 2008 .

[3]  N. Sakai,et al.  Electrophoretic deposition of YSZ powders for solid oxide fuel cells , 2004 .

[4]  A. Rizzo,et al.  A novel method for preparing and characterizing alcoholic EPD suspensions. , 2007, Journal of colloid and interface science.

[5]  E. Roncari,et al.  Preparation of ceramic micro-laminate by electrophoresis in aqueous system , 1995 .

[6]  K. Foger,et al.  Solid oxide electrolyte fuel cell review , 1996 .

[7]  Meilin Liu,et al.  Electrophoretic Deposition of YSZ Particles on Non-Conducting Porous NiO?YSZ Substrates for Solid Oxide Fuel Cell Applications , 2006, Journal of the American Ceramic Society.

[8]  K. Fung,et al.  Characterization on the electrophoretic deposition of the 8 mol% yttria-stabilized zirconia nanocrystallites prepared by a sol–gel process , 2007 .

[9]  Z. Lü,et al.  NiO+YSZ anode substrate for screen-printing fabrication of YSZ electrolyte film in solid oxide fuel cell , 2009 .

[10]  Wenhui Su,et al.  Screen-printed thin YSZ films used as electrolytes for solid oxide fuel cells , 2006 .

[11]  Preparation of YSZ film by gravity-electrophoretic deposition and its application in SOFC , 2007 .

[12]  F. Harbach,et al.  Homogeneous functional ceramic components through electrophoretic deposition from stable colloidal suspensions—I. Basic concepts and application to zirconia , 1998 .

[13]  Y. Hirata,et al.  Effects of Addition of Polyacrylic Ammonium on Colloidal Processing of α-Alumina , 1992 .

[14]  I. Zhitomirsky,et al.  Electrophoretic deposition of electrolyte materials for solid oxide fuel cells , 2004 .

[15]  J. R. Sau,et al.  Aqueous electrophoretic deposition of YSZ electrolyte layers for solid oxide fuel cells , 2008 .

[16]  A. Boccaccini,et al.  The electrophoretic deposition of inorganic nanoscaled materials : A review , 2006 .

[17]  S. Akbar,et al.  Solid‐State Gas Sensors: A Review , 1992 .

[18]  R. Castro,et al.  Surface reactivity and electrophoretic deposition of ZrO2–MgO mechanical mixture , 2007 .

[19]  Yaohui Zhang,et al.  Optimization on technical parameters for fabrication of SDC film by screen-printing used as electrolyte in IT-SOFC , 2008 .

[20]  A. Boccaccini,et al.  Electrophoretic deposition: From traditional ceramics to nanotechnology , 2008 .

[21]  Prabir K. Dutta,et al.  Oxygen sensors: Materials, methods, designs and applications , 2003 .

[22]  S. Aruna,et al.  A study on the electrophoretic deposition of 8YSZ coating using mixture of acetone and ethanol solvents , 2008 .

[23]  R. Castro,et al.  Electrophoretic deposition of ZrO2–Y2O3: a bi-component study concerning self-assemblies , 2009 .

[24]  F. C. Fonseca,et al.  Montagem, calibração e testes de um sistema de medidas elétricas em função da temperatura e da pressão parcial de oxigênio , 2002 .

[25]  Omer Van der Biest,et al.  ELECTROPHORETIC DEPOSITION OF MATERIALS , 1999 .

[26]  J. E. Bauerle.  Study of solid electrolyte polarization by a complex admittance method , 1969 .