Zirconia thin film

Figure 2.10. Variations in refractive indices of zirconia thin films prepared with the drying control agent, diethanolamine (DEA), and using three different heating ramp rates.

Kosacki, I., Suzuki, T., Petrovsky, V., and Anderson, H.U., Electrical conductivity of nanocrystalline ceria and zirconia thin films. Solid State Ionics, 2000, 136, 1225-1233. 

M. Levichkova, V. Mankov, N. Starbov, D. Karashanova, B. Mednikarov, and K. Starbova, Structure and properties of nanosized electron beam deposited zirconia thin films, Surf. Coat. Technol. 141, 70-77 (2001). 

C. Bemay, A. Ringuede, P. Colomban, D. Lincot, M. Cassir, Yttria-doped zirconia thin films deposited by atomic layer deposition ALD a structural, morphological and electrical characterisation. Journal of Physics and Chemistiy of Solids, 2003, v. 64, N 9-10, p. 1761-1770. 

Inaba M, Mineshige A, Maeda T, Nakanishi S, loroi T, Takahshi T, et al. Growth rate of yttria-stabilized zirconia thin films formed by electrochemical vapour-deposition using NiO as an oxygen source II. Effect of the porosity of NiO substrate. Solid State Ionics 1997 104(3/4) 303-10. 

Figure 11.35 Delamination of a sintered zirconia thin film produced by a sol-gel method on a nanoporous alumina substrate. (Courtesy of L. C. De Jonghe.)...

Karthikeyan A, Chang CL, Ramanathan S (2006) High temperature conductivity studies on nanoscale yttria-doped zirconia thin films and size effects. Appl Phys Lett 89(18) 183116... 

Marinova, T., Tsanev, A., Stoychev, D. (2006). Characterisation of Mixed Yttria and Zirconia Thin Films. Materials Science and Engineering B, Vol.130, No. 1-3, pp. 1-4. ISSN 0921-... 

Stefanov, P., Stoychev, D, Stoycheva, M., Ikonomov, J., Maiinova, T., (2000). XPS and SEM characterisation of zirconia thin films prepared by electrochemical deposition. Surface and Interface Analysis, Vol. 30, pp. 628-631, ISSN 1096 - 9918... 

Michel E., Stuerga D., Chaumont D. Microwave flash synthesis of tin dioxide sols from tin chloride aqueous solutions. J. Mater. Sci. Lett. 2001 20 1593-1595 Michel E., Chaumont D., Stuerga D. Sn02 thin films prepared by dip-coating from microwave synthesized colloidal suspensions. J. Colloid and Interface Sci. 2003 257 258-262 Miller K.T., Lange F.F. Single crystal zirconia thin films from liquid precursors. Mater. Res. Soc. Symp. Proc. 1989 155 191-197... 

Zhou W, Shi H, Ran R, Cai R, Shao Z, Jin W (2008) Fabrication of an anode-supported yttria-stabilized zirconia thin film for solid-oxide fuel cells via wet powder spraying. J Power Sources 184(l) 229-237... 

In this case study, a zirconia-alumina membrane has been developed using the sol-gel technique with and without support.6-7 The porous ceramic was prepared to fabricate the membrane support. A thin film of aluminum and zirconium were formed on the porous ceramic support. Unsupported membrane was also prepared. The unsupported membrane was not strong enough to hold a high-pressure gradient it was very fragile and not useful... 

The advantage of sol-gel technology is the ability to produce a highly pure y-alumina and zirconia membrane at medium temperatures, about 700 °C, with a uniform pore size distribution in a thin film. However, the membrane is sensitive to heat treatment, resulting in cracking on the film layer. A successful crack-free product was produced, but it needed special care and time for suitable heat curing. Only y-alumina membrane have the disadvantage of poor chemical and thermal stability. 

We have successfully developed a new inorganic ceramic membrane coated with zirconium and alumina. A thin film of alumina and zirconia unsupported membrane was also fabricated. The successful method developed was the sol-gel technique. 

Crepaldi, E. L. Soler-Illia, G. Grosso, D. Sanchez, M. 2003. Nanocrystallised titania and zirconia mesoporous thin films exhibiting enhanced thermal stability. New J. Chem. 27 9-13. 

It has been observed that solid oxide fuel cell voltage losses are dominated by ohmic polarization and that the most significant contribution to the ohmic polarization is the interfacial resistance between the anode and the electrolyte (23). This interfacial resistance is dependent on nickel distribution in the anode. A process has been developed, PMSS (pyrolysis of metallic soap slurry), where NiO particles are surrounded by thin films or fine precipitates of yttria stabilized zirconia (YSZ) to improve nickel dispersion to strengthen adhesion of the anode to the YSZ electrolyte. This may help relieve the mismatch in thermal expansion between the anode and the electrolyte. 

On heating to 1500 °C/6 h/Ar, the Zr material crystallizes to a mixture of monoclinic and tetragonal zirconia and crystobalite with loss of considerable original surface area (36 m2 g 1). The Hf material behaves similarly, although it partially crystallizes at 1000 °C to produce cubic or tetragonal hafnia. Cristobalite is only observed in materials heated to 1400 °C. Finally, thin films of the Zr and Hf derivatives could be cast from hydrocarbon solutions on quartz and then converted to thin films of the corresponding amorphous or ceramic materials. 

Instead of the system silica/silicate also other systems such as titania/titanate, zirconia/zirconate can be used as a reference system [xiv]. The response time of freshly fabricated thick-film sensors based on thin-film /3-alumina is very short (about 15 ms at 650 °C). After several weeks of operating this time increases 10 times (150 ms) [xv]. Solid electrolyte C02 sensors using Ni/carbonate composite as measuring electrode are suited for measuring of C02 in equilibrated water gases [xiv]. Using semiconducting oxides and carbonates like ITO (indium tin oxide) Nasicon-based C02 sensors are able to measure at room temperature [xvi]. 

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