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利用声互易技术,在0～70MPa压力范围内确定了添钙钛酸铅陶瓷的介电及压电特性与压力的关系。这种材料的横向压电系数(d_(31),g_(31))非常小,由此可得到高的流体静压常数g_h(=g_(33)+2g_(31))和d_h(=d_(33)+2d_(31))。因而该材料的灵敏度比锆钛酸铅(PZT)高的多。这种陶瓷的共振特性测量结果表明,它适于在高频水下换能器中使用。已设计、制作了一些样品换能器,并在1～100kHz和200kHz～2MHz的频率范围内测量了自由场电压灵敏度,测量结果与根据现行高频水听器标准得到的结果进行了比较。这种材料是一种声量扩展器,因而对于电声换能器非常有用。
Based on the reciprocal technique of sound, the relationship between the dielectric and piezoelectric properties of the calcium titanate lead titanate ceramics and the pressure is confirmed in the pressure range of 0 ~ 70MPa. The transverse piezoelectric coefficients (d_ (31), g_ (31)) of this material are very small, and high hydrostatic constants g_h (= g_ (33) + 2g_ (31)) and d_h (33) + 2d_ (31)). Therefore, the sensitivity of this material is much higher than lead zirconate titanate (PZT). The resonance measurement of this ceramic shows that it is suitable for use in high frequency underwater transducers. A number of sample transducers have been designed and fabricated and the free field voltage sensitivity has been measured over the frequency range of 1 to 100 kHz and 200 kHz to 2 MHz. The results are compared with those obtained from the current high frequency hydrophone standards. This material is a sound expander and is therefore very useful for electroacoustic transducers.