摘要
采用切割浇注法,以聚合物改性硫铝酸盐水泥为基体,铌锂锆钛酸铅(简称P(LN)ZT)为功能体制备了1-3型聚合物改性水泥基压电复合材料。研究了P(LN)ZT陶瓷体积分数对复合材料的压电和介电性能的影响。结果表明:随着P(LN)ZT陶瓷体积分数的增加,压电应变常数d33、相对介电常数rε和声阻抗率Z呈现明显的增大趋势;而压电电压常数g33和介电损耗tanδ则呈现下降趋势。与P(LN)ZT陶瓷相比较,1-3型压电复合材料厚度方向振动增强,机械品质因素明显降低,当P(LN)ZT陶瓷体积分数为30.86%时,其声阻抗率为8.24×106N.s/m3,接近于混凝土的声阻抗率9.0×106N.s/m3,适用于制作混凝土超声无损检/监测换能器。
Piezoelectric ceramic（lead niobium lithium zirconate titanate,P（LN）ZT）,sulphoaluminate cement and polymer were used to fabricate polymer modified cement piezoelectric composites by the cut-filling technique.The influence of P（LN）ZT volume fraction on the piezoelectric and dielectric properties of composites was investigated.The results show that as the P（LN）ZT volume fraction increases,the piezoelectric strain factor d33,relative dielectric factor εr and the acoustic impedance Z increase evidently,while the piezoelectric voltage factor g33 and the dielectric loss tanδ decrease.Compared with P（LN）ZT,the vibration at thickness mode of 1-3 type piezoelectric composite is strengthened,however the electromechanical quality factor is reduced.When P（LN）ZT volume fraction is 30.86%,the acoustic impedance value is 8.24×10^6 N·s/m^3,which is close to that of the concrete（9.0×10^6 N·s/m^3） and suitable for fabricating transducers for non destructive inspection.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2009年第6期133-137,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(50672032)
山东省优秀中青年科学家科研奖励基金(2008BS04016)
关键词
聚合物改性水泥
1-3型压电复合材料
压电性能
介电性能
机电性能
声阻抗
polymer modified cement
1-3 piezoelectric composites
piezoelectric properties
dielectric properties
electromechanical properties
acoustic impedance
