Influence of 'Er POT. +3' on the morphology, structure and electrical properties of 'Bi IND. 3.25''La IND. 0.75''Ti IND. 3''O IND. 12' ceramics - Santos, V. B.; M'Peko, Jean-Claude; Mastelaro, Valmor Roberto; Hernandes, Antônio Carlos (International Materials Symposium MATERIAIS, 2009)