Preparation and densification of BaTiO₃ nanopowder by sol-gel autoigniting synthesis

Fangren Hu Lin Li Dongning Zheng, and Changchun Ge1) Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China2) Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China (Received 2001-11

摘 要：Autoigniting synthesis of gel from Ba（NO3）2, TiO（NO3）2 and C6H8O7·H2O aqueous solution was investigated at an initial temperature of 600℃ and tetragonal BaTiO3 nanopowder with particle size of 80nm was prepared. It is indicated that the specific surface area of the combustion product before and after calcination is 14.74 m2/g and 12.49 m2/g, respectively. The combustion wave is composed of solid phase reaction zone and gaseous phase flame reaction zone. The combustion flame temperature is 1 123 K derived from thermocouple measurement. The characteristics and densification behavior of the sol-gel autoigniting synthesized BaTiO3 nanopowder were investigated.

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