Abstract
The microstructure and geometry of yttrium-doped ceria particles, synthesized by spray pyrolysis (SP), were characterized by transmission electron microscopy, and the distribution of yttrium was investigated by energy-dispersive X-ray spectroscopy (EDX). The yttrium distribution was investigated by considering an electron interaction volume and geometry of the particle in an EDX profile analysis. Two models, linear and non-linear, for the yttrium concentration gradient were tested against the experimental EDX data for hollow particles. The results showed that the linear concentration distribution of yttrium fits the EDX profiles appreciably better than the non-linear concentration gradient model. This suggests that yttrium distribution is mainly controlled by the different diffusion rates of the precursors from the centre to the surface of the particle, which could be related to their different solubilities, during the heating process in SP.
Similar content being viewed by others
References
Balazs GB, Glass RS (1995) Ac-impedance studies of rare-earth-oxide doped ceria. Solid State Ion 76:155–162. doi:10.1016/0167-2738(94)00242-K
Bernasik A, Kowalski K, Sadowski A (2002) Surface segregation in yttria-stabilized zirconia by means of angle resolved X-ray photoelectron spectroscopy. J Phys Chem Solids 63:233–239. doi:10.1016/S0022-3697(01)00135-4
Boutz MMR, Winnubst AJA, Burggraaf AJ (1994) Yttria-ceria stabilized tetragonal zirconia polycrystals—sintering, grain-growth and grain-boundary segregation. J Eur Ceram Soc 13:89–102. doi:10.1016/0955-2219(94)90106-6
Castillo IA, Munz RJ (2005) Inductively coupled plasma synthesis of CeO2-based powders from liquid solutions for SOFC electrolytes. Plasma Chem Plasma Process 25:87–107. doi:10.1007/s11090-004-8836-3
Ii S, Yoshida H, Matsui K, Ohmichi N, Ikuhara Y (2006) Microstructure and surface segregation of 3 mol% Y2O3-doped ZrO2 particles. J Am Ceram Soc 89:2952–2955
Inaba H, Tagawa H (1996) Ceria-based solid electrolytes—review. Solid State Ion 83:1–16. doi:10.1016/0167-2738(95)00229-4
Kilbourn BT (1993) Part 1, A–L. A lanthanide lantology. Molycorp Inc., Mountain Pass, p 4
Longo V, Podda L (1981) Phase-equilibrium diagram of the system ceria-yttria for temperatures between 900 and 1700 °C. J Mater Sci 16:839–841. doi:10.1007/BF02402807
Maric R, Seward S, Faguy PW, Oljaca M (2003) Electrolyte materials for intermediate temperature fuel cells produced via combustion chemical vapor condensation. Electrochem Solid ST 6:A91–A95. doi:10.1149/1.1562071
Minh NQ (1993) Ceramic fuel-cells. J Am Ceram Soc 76:563–588. doi:10.1111/j.1151-2916.1993.tb03645.x
Mori T, Drennan J, Lee JH, Li JG, Ikegami T (2002) Improving the ionic conductivity of yttria-stabilised zirconia electrolyte materials. Solid State Ion 154:529–533. doi:10.1016/S0167-2738(02)00508-8
Mori T, Drennan J, Wang Y, Auchterlonie G, Li J-G, Yago A (2003) Influence of nano-structural feature on electrolytic properties in Y2O3 doped CeO2 system. Sci Technol Adv Mater 4:213–220. doi:10.1016/S1468-6996(03)00047-0
Ou DR, Mori T, Ye F, Kobayashi T, Zou J, Auchterlonie G et al. (2006) Oxygen vacancy ordering in heavily rare-earth-doped ceria. Appl Phys Lett 89:171911. doi:10.1063/1.2369881
Ou DR, Mori T, Ye F, Zou J, Auchterlonie G, Drennan J (2007) Evidence of intragranular segregation of dopant cations in heavily yttrium-doped ceria. Electrochem Solid ST 10:P1–P3. doi:10.1149/1.2372224
Seo DJ, Ryu KO, Park SB, Kim KY, Song RH (2006) Synthesis and properties of Ce1−x GdxO2−x/2 solid solution prepared by flame spray pyrolysis. Mater Res Bull 41:359–366. doi:10.1016/j.materresbull.2005.08.012
Shih S-J, Huang Y, Lyu Y-R, Chen C-Y (2008) Cross-sectional observation of yttrium and nickel oxide doped ceria powder. J Nanosci Nanotechnol (in press)
Skarman B, Grandjean D, Benfield RE, Hinz A, Andersson A, Wallenberg LR (2002) Carbon monoxide oxidation on nanostructured CuO x /CeO2 composite particles characterized by HREM, XPS, XAS, and high-energy diffraction. J Catal 211:119–133
Song YL, Tsai SC, Chen CY, Tseng TK, Tsai CS, Chen JW et al (2004) Ultrasonic spray pyrolysis for synthesis of spherical zirconia particles. J Am Ceram Soc 87:1864–1871
Suda S, Kawahara K, Kawano M, Yoshida H, Inagaki T (2007) Preparation of matrix-type nickel oxide/samarium-doped ceria composite particles by spray pyrolysis. J Am Ceram Soc 90:1094–1100. doi:10.1111/j.1551-2916.2007.01530.x
Theunissen G, Winnubst AJA, Burggraaf AJ (1992) Surface and grain-boundary analysis of doped zirconia ceramics studied by AES and XPS. J Mater Sci 27:5057–5066. doi:10.1007/BF01105274
VanHerle J, Horita T, Kawada T, Sakai N, Yokokawa H, Dokiya M (1996) Low temperature fabrication of (Y, Gd, Sm)-doped ceria electrolyte. Solid State Ion 86–8:1255–1258. doi:10.1016/0167-2738(96)00297-4
Wang DY, Park DS, Griffith J, Nowick AS (1981) Oxygen-ion conductivity and defect interactions in yttria-doped ceria. Solid State Ion 2:95–105. doi:10.1016/0167-2738(81)90005-9
Acknowledgement
Discussions with Dr Yizhong Huang (University of Oxford) are gratefully acknowledged. This research was partially supported by the National Science Council, Republic of China, through Contract No. NSC96-2221-E-035-059.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Shih, SJ., Chang, LY.S., Chen, CY. et al. Nanoscale yttrium distribution in yttrium-doped ceria powder. J Nanopart Res 11, 2145–2152 (2009). https://doi.org/10.1007/s11051-009-9585-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11051-009-9585-2