PREPARATION OF A BARIUM-TITANATE DISPERSED-MAGNESIA NANOCOMPOSITE

Ceramic nanocomposites with a perovskite-type ferroelectric dispersoid were studied, to introduce ferroelectricity into structural ceramics. Barium titanate (BaTiO3) was found to be phase compatible with magnes ia (MgO) during sintering, and a MgO matrix/BaTiO3 nanocomposite was s uccessfully fabricated by a conventional powder mixing and sintering m ethod. The mechanical strength of the nanocomposite was not degraded, although weak BaTiO3 was incorporated into the composite. The BaTiO3 d ispersoid was tetragonal or possibly orthorhombic, although the tetrag onality, c/a, was decreased from the starting powder.