The Effect of Li-Salt Additions on the Densification of Tin Oxide

Abstract

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.

Department(s)

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)

0884-2914

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1993 Cambridge University Press, All rights reserved.

Publication Date

01 Jul 1993

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