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| Home > Publications database > Preparation and characterization of high density, high purity lanthanum aluminate bulk ceramics |
| Journal Article | PreJuSER-40847 |
; ; ;
2003
Springer Science + Business Media B.V
Dordrecht [u.a.]
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Please use a persistent id in citations: doi:10.1023/B:JECR.0000011217.93927.1a
Abstract: In this work some methods for preparation of lanthanum aluminate bulk ceramics were compared. High purity lanthanum aluminate LaAlO3 (LAO) ceramic samples of high density (>94%) were prepared via three different routes and the morphology, chemical and electrical properties of the samples were investigated. For high purity samples a sol-gel route A. Douy and P. Odier [1] and a thermal nitrate decomposition route Shaji Kumar et al. [2] were introduced to reduce unintentional doping by the preparation process to a minimum. As a standard route the mixed oxide process was chosen. In sol-gel and nitrate decomposition procedures the formation temperature of LaAlO3 from its oxides was lowered by using reactive gamma-alumina from the pyrolysis of initial aluminium nitrate instead of commonly used alpha-alumina (corundum) in the mixed oxide process. No commercial gamma-alumina of sufficient purity is known.Differences in the electrical behaviour of the samples were measured, indicating some correlations between the samples' different morphology, purity and its' preparation parameters.
Keyword(s): J ; lanthanum aluminate (auto) ; ceramics preparation (auto) ; electrical properties (auto)
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