Mamnufacture of BaTiO3 based ceramic powder and its property

BaTiO₃ based ceramics were applied widely to make electronics units. But conventional processing of BaTiO₃ ceramic particles relies on the solid-state reactions, by which the coarse, impure, inhomogeneous and multiphase powders were produced. In this paper, new method was used to synthesize BaTiO₃ based ceramic nanopowder with the particle size 20- 90 nm by use of Ba(NO₃)₂ - Ti(OC₄H₉)₄-ammonia-citric acid raw material system. BET equipment was used to measure the specific surface area of BaTiO₃ based ceramic. The pacific surface area is 15 m²/g. Sedimentometry was applied to measure particle size and distribution. The test results show that the fine BaTiO₃ based ceramic particles were well distributed and the dielectric constant of the material is more than 5000.