No abstract

Barium titanate-silver composites were manufactured with silver contents ranging from 0 wt.% to 30 wt.%. The electrical properties were systematically characterised in terms of relative permittivity, conductivity, piezoelectric properties (d 33 , d 31 and coupling coefficient), polarisation-field measurements and electrical breakdown strength. The electrical properties are strongly influenced by the conducting phase, with an increase in relative permittivity, conductivity, coercive field and remnant polarisation measured. A decrease in breakdown strength and piezoelectric coefficients were observed.

Barium titanate-silver composites were manufactured with silver contents ranging from 0 wt.% to 30 wt.%. The electrical properties were systematically characterised in terms of relative permittivity, conductivity, piezoelectric properties (d 33 , d 31 and coupling coefficient), polarisation-field measurements and electrical breakdown strength. The electrical properties are strongly influenced by the conducting phase, with an increase in relative permittivity, conductivity, coercive field and remnant polarisation measured. A decrease in breakdown strength and piezoelectric coefficients were observed.

No abstract

Barium titanate-silver particulate composites were prepared by attrition milling BaTiO 3 and silver nitrate, followed by conventional processing. After manufacture, microstructural, mechanical and electrical characterisation was undertaken to examine the influence of silver addition on properties. The effect of the addition of conductive inclusions in a capacitive matrix on properties, such as permittivity, was simulated using a random network of resistors and capacitors. Model results were compared with experimental results.