Abstract

SILVA, R. S.; ANTONELLI, E.  and  HERNANDES, A. C.. Low temperature synthesis and sintering of Ba_1-xCa_xTiO₃ nanometric powders. Cerâmica [online]. 2006, vol.52, n.323, pp. 168-173. ISSN 0366-6913.  http://dx.doi.org/10.1590/S0366-69132006000300009.

Barium calcium titanate nanopowders (Ba_1-xCa_xTiO₃: x = 0.05, 0.10, 0.15 and 0.23 mol%) have been synthesized at relative low temperature ( 800 ºC) through the modified polymeric precursor method. High relative density ceramics (> 97%) and microstructure with homogeneous grain size were obtained at relative low temperature and time of sintering (1275 °C/1 h). It was also observed that the crystallite size of the calcined powder and the average grain size of the sintered ceramics decrease with the increase of the calcium concentration.

Keywords : BCT; nanometric powders; BaTiO₃.