%0 Journal Article
%T Efeito da adi£¿£¿o de ¨®xido de zinco e de ¨®xido de boro nas propriedades do zirconato de b¨¢rio dopado com ¨ªtrio
%A Andrade
%A T. F.
%A Muccillo
%A R.
%J Ceramica
%D 2011
%I Associa??o Brasileira de Cer?mica
%R 10.1590/S0366-69132011000200018
%X bazr0.8y0.2o3-¦Äprotonic conductors, prepared by the ceramic route, were pressed and sintered with zno and b2o3 sintering aids. the sintered pellets were analyzed by x-ray diffraction and impedance spectroscopy. polished and thermally etched surfaces of the pellets were observed in a scanning probe microscope. the highest values of apparent density, 95%t.d., were obtained with 2 and 5 wt.% zno. the lowest value of electrical resistivity was evaluated in the yttrium-doped barium zirconate compounds with 5 wt.% zno. boron oxide and zinc oxide sintering aids were efficient to improve the apparent density as well as the electrical conductivity of bazr0.8y0.2o3-¦Äprotonic conductors.
%K barium zirconate
%K boron oxide
%K zinc oxide
%K impedance spectroscopy
%K protonic conductor.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0366-69132011000200018&lng=en&nrm=iso&tlng=en