J. Phys. IV France 128 (2005) 115-120
Effect of neutron irradiation on some piezoelectric properties of PZT type ceramicsC. Miclea, C. Tanasoiu, C.F. Miclea, I. Spanulescu and M. Cioangher
National Institute for Materials Physics, 077125 Magurele-Bucharest, Romania
Soft and hard type piezoceramic sintered samples were subjected to neutron irradiation in fluxes up to 1018 n/cm2 and the changes of the basic properties brought about by irradiation were investigated. The results showed that intermediate irradiation levels of up to 1015 n/cm2 do not change significantly the properties, but higher levels changed them. Thus the electromechanical coupling factor, the dielectric permittivity and losses decreased while the mechanical quality factor increases with increasing neutron flux for both types of materials. Changes of the lattice constants a and c were also observed. The main defects produced by neutron irradiation are oxygen vacancies but they are not entirely responsible for the modification of the materials properties. Some other factors such as domain pinning and lattice deformation can contribute to the properties degradation.
© EDP Sciences 2005