Laser Sintering of BaTiO3 Ceramics Obtained from Nanometric Powders
We have studied the synthesis and sintering of BaTiO3 (BTO) nanometric powders produced by Pechini technique. A laser sintering procedure was applied to the BTO and its major advantage was the quickness of the processing. We have used the radiation of a CO2 laser (CW – 100 W) as the heating source. A linear rate of irradiation was applied to avoid macroscopic defects. The calcined powder at 800°C presented a single crystalline phase confirmed by the XRD and a crystallite size of 20 nm. BTO ceramics sintered at Pmax = 7.0 W/mm2 for 10 min of irradiation showed a high relative density (98 ± 1) % with an average grain size of 400 nm for a total time of sintering of 40 minutes.
Paula Maria Vilarinho
R. S. da Silva and A. C. Hernandes, "Laser Sintering of BaTiO3 Ceramics Obtained from Nanometric Powders", Materials Science Forum, Vols. 514-516, pp. 1216-1220, 2006