Textured Al-Doped ZnO Ceramics with Isotropic Grains

Pablo Díaz-Chao (1) , Fabien Giovannelli (2) , Oleg Lebedev (1) , Daniel Chateigner (1) , Luca Lutterotti (1) , Fabian Delorme (2) , Emmanuel Guilmeau (1)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 GREMAN - UMR 7347 - GREMAN (matériaux, microélectronique, acoustique et nanotechnologies)

Pure ZnO and single Al-doped ZnO compounds without secondary phase have been obtained by SPS process. Starting powders prepared by coprecipitation have been synthesized. The sintered pellets exhibit different texture degree but similar isotropic shaped grains. Sintering mechanisms are proposed for both powders, explaining the different texture and grain size evolutions as a direct consequence of the differences observed in both compounds. The influence of texture and grain morphology on the thermoelectric properties is studied.

Mots clés: Spark plasma sintering; Thermoelectric properties; Texture; Anisotropy

Domaines: Matériaux

Pablo Díaz-Chao, Fabien Giovannelli, Oleg Lebedev, Daniel Chateigner, Luca Lutterotti, et al.. Textured Al-Doped ZnO Ceramics with Isotropic Grains. Journal of the European Ceramic Society, 2014, 34 (16), pp.4247-4256. ⟨10.1016/j.jeurceramsoc.2014.07.009⟩. ⟨hal-01755974⟩