| Title |
Piezoelectric properties ofPbTiO_3 system ceramics for hydrophone |
| Keywords |
Hydrostatic Piezoelectric Constant ; Anisotrotropic ; Hydrophone |
| Abstract |
In this study, to improve sintering condition, anisotropic properties ( k_{t}/ k_{p}) of electromechanical coupling coefficient and piezoelectric constant d_{h} and g_{h}, Mn O_{2} impurity was added to the (P b_{0.76}C a_{0.24})[( Co_{1}2/ W_{1}2/)_{0.04} Ti_{0.96}] O_{3} ceramics for application to hydrophone devices. Electromechanical coupling coefficients of the specimen with 1.5 [mol%] Mn O_{2} sintered at 1150.deg. C were k_{t}=49% and k_{p} = O, which exibited the highest value in piezoelectric anisotropic properties (kt/kp). Without relations with sintering temperature, the highest value of hydrostatic piezoelectric constant d_{h} & g_{h} were shown at the specimen with 1.5 [mol%] Mn O_{2}. Accordingly, the best addition amount of Mn O_{2} was 1.5 [mol%] and proper sintering temperature was 1150.deg. C. Hydrostatic piezoelectric constant values of d_{h}=64.52[10^{-12} C/N], g_{h}=35.92[10^{-3} Vm/N] in the above condition were effectiely extended for hydrophone applications.pplications.ons. |