Nanosized Barium Titanate Powder by Mechanical Activation

Abstract

Mechanical activation, without any additional heat treatment, is used to trigger the formation of a perovskite BaTiO 3 phase in an oxide matrix that consists of BaO and TiO 2 in a nitrogen atmosphere. The resulting BaTiO 3 powder exhibits a well‐established nanocrystalline structure, as indicated by phase analysis using X‐ray diffractometry. A crystallite size of ∼14 nm is calculated, based on the half‐width of the BaTiO 3 (110) peak, using the Scherrer equation, and an average particle size of 20–30 nm is observed using transmission electron microscopy for the activation‐derived BaTiO 3 powder.