[1] Univ Fed Rio Grande do Sul, Postgrad Program Min Met & Mat Engn PPGE3M, BR-91501970 Porto Alegre, RS, Brazil
[2] Univ Bremen, Adv Ceram, D-28359 Bremen, Germany
[3] Univ Fed Rio Grande do Sul, Inst Chem, BR-91501970 Porto Alegre, RS, Brazil
[4] Univ Fed Santa Catarina, Chem & Food Engn Dept, BR-88040900 Florianopolis, SC, Brazil