Effect of Al2O3 Additives in PZT-Pb(Mn1/3Nb2/3)O3 Ceramics
The effect of adding Al2O3 to the PZT-PMN solid solution material for use for ceramic resonator was investigated. It has been found that when the amount of Al2O3 added to PZT-PMN is 0.3 wt% or below, it exists inside the crystal lattice as Al3+ ion and increases the stability of oscillation frequency over application of heat (heat resistance). It has been found that when more than 0.3 wt% of Al2O3 is added, the Al3+ ion that remained undoped will exist at grain boundary as secondary phase, and increase the strength.
Shinobu Fujihara and Tadashi Takenaka
K. Teranishi et al., "Effect of Al2O3 Additives in PZT-Pb(Mn1/3Nb2/3)O3 Ceramics", Key Engineering Materials, Vol. 445, pp. 19-22, 2010