Researching for piezoelectric ceramic materials

At present, great progress has been made in the research of B aT iO3 piezoelectric ceramics. 75%  piezoelectric ceramics is using a special mechanism, PZT piezoelectric cylinders found a large electrostrictive effect in B aT iO3 single crystal to produce 0.75% electrostriction at low field. Compared with the traditional PZT piezoelectric ceramics, it is about 40 times higher than PZT under the same electric field and more than 10 times larger than the high-strain Pb-PbTiO3 crystal. In the (Ba, Sr) TiO3 piezo ceramic is doped piezo elements based on point defect theory,piezoelectric disc crystal is found in BaSr0 piezoelectric ceramic 0.12% ~ 0.15% of the large nonlinear electrostriction, and this Effect at 0.05Hz is low frequency, even in the fatigue cycle of 10,000, the electrostrictive effect remain stable. This large nonlinear electrostrictive effect of piezo sphere transducer will be widely used in extreme impact and nonlinear ultrasonic actuators. It can be seen from the above, regardless of lead-containing piezoelectric ceramics or lead-free piezoelectric ceramics in the current situation, mainly adding a variety of dopants for modification. Therefore, in general, piezoelectric ceramic materials are complex ceramic solid solution. The composition of the multi-line piezoelectric ring transducer adds even more complexity. This will bring great difficulties to material performance testing.Traditional methods for material performance analysis to get the impact of changes in a certain conditions on performance, which often fixed other conditions, a lot of experiments on the conditions are examined for capacitive piezoelectric disc . The situation becomes more complicated if one looks at the effects of several other conditions under one condition. Piezo thickness sensor is using artificial neural network to establish accurate mathematical model to predict the performance accurately. The method is accurate, concise, more importantly, which can optimize the optimal formula of the best performance, its practical value is immeasurable.