Coating of La1-XSrXCo1-YFeYO3-& Films on Zirconia and CGO (Cerium Gadolinium Oxide) by Electrostatic Spray Deposition (ESD)
Abstract
In this study preparation and characterization of coating of La0.6Sr0.4Co0.8Fe0.2O3-δ and La0.6Sr0.4Co0.2Fe0.8O3-δ materials on TZ-3Y (3 mol % doped yttria) and CGO (Ce0.9Gd0.1 Oxide) ceramic electrolytes was studied. Electrostatic spray deposition (ESD) was used for depositing the coatings on ceramic electrolytes to develop a well bonded electrolyte-cathode material for potential IT-SOFCs (intermediate temperature solid oxide fuel cells) applications. Precursor solutions having La0.6Sr0.4Co0.8Fe0.2O3-δ or La0.6Sr0.4Co0.2Fe0.8O3-δ stoichiometry were prepared from various salts before being sprayed on a heated ceramic substrate which rapidly evaporated the solvent in the salts and covered its surface. Effects of experimental parameters like the flow rate of the solution (0.3-1.5 ml/h),distance between the nozzle and substrate (15-45 mm), temperature of the substrate (250-375 °C), post heat treatment temperature (900-1300 °C) of the coated substrate and applied voltage on the quality of the coating were studied by several methods including DTA/TGA, Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). Coating microstructures ranged from dense to porous depending on the deposition parameters. Sample with 30 mm distance and 0.7 ml/h of flow rate produced the best reticulated structure of the coating. No preferential landing effect was observed on any of the samples studied. Zirconia was not an effective substrate for formation of La0.6Sr0.4Co0.8Fe0.2O3-δ or La0.6Sr0.4Co0.2Fe0.8O3-δ. Cerium gadolinium oxide, however, was effective for La0.6Sr0.4Co0.8Fe0.2O3-δ but not for La0.6Sr0.4Co0.2Fe0.8O3-δ. © Afyon Kocatepe Üniversitesi
Keywords
References
- Chen, C.H., Kelder, E.M., Van der Put, P.J.J.M. and Schoonman, J. 1998. Thin Films Components For Lithium Ion Batteries. Ph.D. Delft University of Technology, Netherlands, Electrochemical Society Proceedings, 96, 14, 43-57.
- EG&G Technical Services, 2004. Inc. Fuel Cell Handbook, 7th ed.; U.S. Department of Energy Office of Fossil Energy National Energy Technology Laboratory, West Virginia, 2004.
- Hoogers, G., 2003. Fuel Cell Technology Handbook, 2nd.; CRC Press, 1-332.
- http://www.ecn.nl (29.06.2010).
- Huijmans, J.P.P., 2001. Ceramics In Solid Oxide Fuel Cells. Solid State & Materials Science, 5, 317-323.
- Marinha, D., Rossignol, C. and Djurado, E. 2009, Influence of Electrospraying Parameters on the Microstructure of La0.6Sr0.4Co0.2Fe0.8O3-δ Films for SOFCs. Journal of Solid State Chemistry, 182, 1742- 1748.
- Minh, N.Q. and Takahashi, T., 1995. Science and Technology of Ceramic Fuel Cells. Elsevier Science, 1- 379.
- Nguyen, T. and Djurado, E., 2001, Deposition and
- Characterization of Nanocrystalline Tetragonal
Elektrostatik Sprey Kaplama (ESD) Metodu ile Zirkonya ve CGO (Seryum Gadolinyum Oksit) Üzerine La1-XSrxCo1-YFeyO3-δ Filmlerinin Kaplanması
Abstract
Bu çalışmada La0.6Sr0.4Co0.8Fe0.2O3-δ ve La0.6Sr0.4Co0.2Fe0.8O3-δ katot malzemelerinin TZ-3Y (%3 mol yitriya katkılı zirkonya) ve CGO seramik elektrolitlerinin üzerine kaplanmasının karakterizasyonu çalışılmıştır. Orta sıcaklıktaki katı oksit yakıt hücelerine uyumlu katot ve elektrolit malzemesini geliştirebilmek için elektrostatik sprey kaplama tekniği kullanılmıştır. Çeşitli metalik tuzlar kullanılarak La0.6Sr0.4Co0.8Fe0.2O3-δ veya La0.6Sr0.4Co0.2Fe0.8O3-δ stokiyometrilerine sahip çözeltiler hazırlanmıştır. Bu çözeltiler, sıcak seramik yüzey üzerine püskürtülmüş ve böylece seramik yüzey kaplanmıştır. Çözeltinin akış oranı (0.3-1.5 ml/s), püskürtücü ile seramik yüzey arasındaki uzaklık (15-45 mm), substrat sıcaklığı (250-375oC), kaplanmış yüzeylerin sıcaklığı (900-1300oC) ve uygulanan voltaj gibi deneysel parametrelerin kaplama kalitesi üzerine etkileri, DTA/TGA, taramalı elektron mikroskobu (SEM) ve X ışınları analizi (XRD) kullanılarak incelenmiştir. Kaplanan mikroyapılar, kaplama parametrelerine bağlı olarak yoğun ve poroz şeklinde çeşitlendirilmiştir. En iyi ağ mikroyapı, 30 mm uzaklık ve 0.7 ml/s akış oranında sahip olan örnekte elde edilmiştir. Tanelerin üst üste binme etkisi hiçbir numunede gözlenmemiştir. TZ-Y3 seramik yüzeyi La0.6Sr0.4Co0.8Fe0.2O3-δ ve La0.6Sr0.4Co0.2Fe0.8O3-δ katot üretimi için kullanışlı değilken, seryum gadolinyum oksit seramik yüzey ise sadece La0.6Sr0.4Co0.8Fe0.2O3-δ katot malzeme üretimi için kullanışlıdır.
Keywords
Elektrostatik Sprey Kaplama Katı Oksit Yakıt Pilleri La1-xSrxCo1-yFeyO3-δ Seryum Gadolinyum Oksit.
References
- Chen, C.H., Kelder, E.M., Van der Put, P.J.J.M. and Schoonman, J. 1998. Thin Films Components For Lithium Ion Batteries. Ph.D. Delft University of Technology, Netherlands, Electrochemical Society Proceedings, 96, 14, 43-57.
- EG&G Technical Services, 2004. Inc. Fuel Cell Handbook, 7th ed.; U.S. Department of Energy Office of Fossil Energy National Energy Technology Laboratory, West Virginia, 2004.
- Hoogers, G., 2003. Fuel Cell Technology Handbook, 2nd.; CRC Press, 1-332.
- http://www.ecn.nl (29.06.2010).
- Huijmans, J.P.P., 2001. Ceramics In Solid Oxide Fuel Cells. Solid State & Materials Science, 5, 317-323.
- Marinha, D., Rossignol, C. and Djurado, E. 2009, Influence of Electrospraying Parameters on the Microstructure of La0.6Sr0.4Co0.2Fe0.8O3-δ Films for SOFCs. Journal of Solid State Chemistry, 182, 1742- 1748.
- Minh, N.Q. and Takahashi, T., 1995. Science and Technology of Ceramic Fuel Cells. Elsevier Science, 1- 379.
- Nguyen, T. and Djurado, E., 2001, Deposition and
- Characterization of Nanocrystalline Tetragonal
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | December 1, 2014 |
| Submission Date | August 8, 2015 |
| Published in Issue | Year 2014 Volume: 14 Issue: 3 |