The study focuses the processing of La 1Àx Sr x Ga 1Ày Mg y O 3Àd (LSGM) tapes and the characterization of their microstructure, chemical composition, and sinter behavior during annealing. Dilatometric runs show that sintering of the tapes conclude at about 15001C. This finding correlates with the observed sharp increase of the crystallinity of LSGM at higher temperatures. The porosity of the tapes has been found to be minimum at 15251C. Increasing sintering temperatures cause a loss of Sr, Mg, and Ga, which is presumably due to evaporation of the elements. The Vickers hardness of the tapes sintered at 15001C was measured to be about 900.

La 1Àx Sr x Ga 1Ày Mg y O 3Àd (LSGM) powder of different composition and a grain size of about 5-10 mm were plasma sprayed on Ti substrates in order to study the effect of plasma spraying of LSGM on the microstructure and chemical composition of the resulting ceramic LSGM layers. As-sprayed LSGM layers contain a considerable amount of amorphous phase besides LSGM grains, whereas postannealed layers mainly consist of LSGM besides very small amounts of second phases. Evaporation of mainly Ga was observed, which considerably altered the chemical composition of the layers.

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