The Effect of Li-Salt Additions on the Densification of Tin Oxide
Sintering of pure SnO2 to high densities is difficult due to its high vapor pressure, and hence, additives are typically used to enhance densification. In this study, the effects of two lithium compounds, LiF and LiNO3 on the densification behavior of SnO2 were evaluated. While LiF resulted in only a modest improvement in densification, LiNO3 additions resulted in densities of 5≥95% theoretical at 1500 °C in air. Thermal, x-ray, and SEM/TEM microstructural analyses indicated no liquid phase formation. From these studies we attribute the enhanced sintering behavior to the ionic-compensation of Li+ as an acceptor dopant, i.c., 3[Li'''sn = 2[Vo ö],which in turn increased the diffusivity of oxygen.
D. Yuan et al., "The Effect of Li-Salt Additions on the Densification of Tin Oxide," Journal of Materials Research, vol. 8, no. 7, pp. 1675-1679, Cambridge University Press, Jul 1993.
The definitive version is available at https://doi.org/10.1557/JMR.1993.1675
Materials Science and Engineering
Keywords and Phrases
Composition effects; Densification; Doping (additives); Lithium compounds; Microscopic examination; Oxides; Sintering; Acceptor dopant; Tin oxide
International Standard Serial Number (ISSN)
Article - Journal
© 1993 Cambridge University Press, All rights reserved.