%0 Journal Article
%A Elsebrock, R.
%A Makovicka, C.
%A Meuffels, P.
%A Waser, R.
%T Preparation and characterization of high density, high purity lanthanum aluminate bulk ceramics
%J Journal of electroceramics
%V 10
%@ 1385-3449
%C Dordrecht [u.a.]
%I Springer Science + Business Media B.V
%M PreJuSER-40847
%P 193 - 202
%D 2003
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000187928000005
%R 10.1023/B:JECR.0000011217.93927.1a
%U https://juser.fz-juelich.de/record/40847