SciELO - Scientific Electronic Library Online

vol.52 issue323Systemic analysis for refractory selection for molten aluminum transportationErosion resistance of refractory castables author indexsubject indexarticles search
Home Pagealphabetic serial listing  


Print version ISSN 0366-6913
On-line version ISSN 1678-4553


SILVA, J. F. et al. Synthesis of ZnAl2O4: Yb:Er by combustion reaction. Cerâmica [online]. 2006, vol.52, n.323, pp.123-127. ISSN 0366-6913.

Zinc aluminate doped with ytterbium and erbium in the proportions 2:1, 3:1, 4:1, and 5:1 mol of Yb:Er were synthesized by combustion reaction. The effect of the Yb:Er in the structure and morphology of the zinc aluminate was investigated. The powders were synthesized on the basis of the propellants chemistry concepts and characterized by X-ray diffraction, nitrogen adsorption (BET method) and scanning electron microscopy. The results show the formation of the ZnAl2O4:Yb:Er as majority crystalline phase and traces of ZnO and Yb2O3 as secondary phases, and that the increase of the Yb:Er proportion favored the increase of the content of secondary phases. All the compositions presented morphology formed by soft agglomerates of fine particles. The surface area increases with increasing Yb:Er proportion.

Keywords : spinel; rare-earth; combustion reaction.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License