Abstract
The effect of Al2O3 and Nb2O5 additions on the microstructure and thermal expansion behavior of tantalum (V) oxide has been studied. Both singly doped and co-doped compositions were examined. Compositions with 3 wt% Al2O3 (or greater), contained AlTaO4 as a second phase. Complete solubility was observed for Nb2O5 contents in the range 1–5 wt%. It was found that doping with Al2O3 results in a decrease of the coefficient of thermal expansion (CTE), such that increasing amounts of Al2O3 (1–5 wt%) cause a successive decrease in the CTE value. In the case of Nb2O5 additions, the result is an increase in the CTE of the tantalum (V) oxide. However, in the range 1–5 wt% Nb2O5, the CTE value is relatively insensitive to the amount of Nb2O5 added. Due to the countervailing influences of these two additive oxides, it was demonstrated that co-doping with Al2O3 and Nb2O5 is an effective strategy for tailoring the CTE of tantalum (V) oxide.
Similar content being viewed by others
References
N. S. JACOBSON, J. Am. Ceram. Soc. 76 (1995) 1297.
E. J. OPILA, ibid. 86 (2003) 1238.
R. CHAIM, S. ALMALEH-ROCKMAN and L. GAL-OR, ibid. 77 (1994) 3202.
H. DU, R. E. TRESSLER and C. G. PANTONO, J. Electrochem. Soc. 136 (1989) 1527.
S. SHANMUGHAM, M. HENDERICK, N. RICHARDS and M. OJACA, J. Mater. Sci. 39 (2004) 377.
M. MOLDAVAN, C. M. WEYANT, D. L. JOHNSON and K. FABER, J. Thermal Spray Technol. 13 (2004) 51.
Y. W. BAE, W. Y. LEE and D. P. STINTON, J. Am. Ceram. Soc. 78 (1995) 1927.
A. REISMAN, F. HOLZBERG, M. BERKENLIT and M. BERRY, J. Am. Chem. Soc. 78 (1956) 4514.
S. WU, H. M. CHAN and M. P. HARMER, J. Am. Ceram. Soc., in press.
O. YAMAGUCHI, D. TOMIHISA, M. SHIRAI and K. SHIMIZU, ibid. 71 (1988) C-260.
O. YAMAGUCHI, D. TAMIHISA, T. UEGAKI and K. SHIMIZU, ibid. 70 (1987) C-335.
J. L. WARING and R. S. ROTH, J. Res. Natl. Bur. Stand. 72A (1968) 175.
R. S. ROTH, J. L. WARING and W. S. BROWER, J. Res. Natl. Bureau Stand. - A. Phys. and Chem. 74A (1970) 477.
S. FREOUR, D. GLOAGUEN, M. FRANCOIS and R. GUILLEN, Mater. Sci. Forum 426–432 (2003) 2083.
C. H. HSUEH, P. F. BECHER and E. Y. SUN, J. Mater. Sci. 36 (2001) 255.
Y.-S. LEE, M. N. GUNGOR, T. J. BATT and P. K. LIAW, Mater. Sci. Eng. A 145 (1991) 37.
A. REISMAN and F. HOLTZBERG, High Temp. Oxides 2 (1970) 217.
G. P. MOHANTY, L. J. FIEGEL and J. H. HEALY, J. Phys. Chem. 68 (1964) 208.
Y. S. TOULOUKIAN, R. K. KIRBY, R. E. TAYLOR and T. Y. R. LEE, “Thermal Expansion, Nonmetallic Solids.” (Plenum, New York, 1977) p. 374.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wu, S., Chan, H.M. & Harmer, M.P. Compositional tailoring of the thermal expansion coefficient of tantalum (V) oxide. J Mater Sci 41, 689–695 (2006). https://doi.org/10.1007/s10853-006-6487-x
Issue Date:
DOI: https://doi.org/10.1007/s10853-006-6487-x