Li Guang, Wang Li-kun, Luan Gui-dong, Zhang Jin-duo, Li Shu-xiang
School of Electronics Engineering and Computer Science, Peking University, Beijing, China.
Ultrasonics. 2006 Dec 22;44 Suppl 1:e639-42. doi: 10.1016/j.ultras.2006.05.138. Epub 2006 Jun 9.
A novel 1-3-2 type piezoelectric composite is developed. There are piezoelectric ceramic framework supports at transverse and longitudinal directions in its structure, so it is free from the influence of any outside mechanic impact and environmental temperature change. The sample characteristic is good coherence. It has many advantages, such as a high piezoelectricity, lower density and acoustic impedance matching with water and tissue easily. Based on Newnham's series and parallel theory of composites, the calculation formulae of dielectric and piezoelectric constants of a 1-3-2 type piezoelectric composite are deduced. The sample's characteristics indicate that a 1-3-2 type piezoelectric composite's theoretic calculation values are in good agreement with the measurement results. Element samples have been designed, manufactured and measured. The results indicate that the resonant frequency, resonant impedance, piezoelectricity and static capacity of these samples are stable. It is easy to design sensor array elements using this material.
一种新型的1-3-2型压电复合材料被研制出来。其结构在横向和纵向都有压电陶瓷框架支撑，因此不受任何外部机械冲击和环境温度变化的影响。样品特性具有良好的一致性。它具有许多优点，如压电性高、密度低以及声阻抗易于与水和组织匹配。基于纽纳姆复合材料的串联和并联理论，推导了1-3-2型压电复合材料的介电常数和压电常数的计算公式。样品特性表明1-3-2型压电复合材料的理论计算值与测量结果吻合良好。已设计、制造并测量了元件样品。结果表明这些样品的谐振频率、谐振阻抗、压电性和静态电容都很稳定。使用这种材料很容易设计传感器阵列元件。
