Investigation into the strength, toughness and porosity of barium titanate PTC ceramics

The effect of processing variables on the Strength and Toughness of n-doped Barium Titanate PTC Ceramics has been investigated. Fracture Toughness, K(_IC), has been measured using an indentation technique and a more conventional notched beam specimen geometry. Strength, measured by pure bending of a beam and diametral compression of flat circular specimens has been related to material toughness in terms of the material porosity introduced by processing.