路面用PZT/沥青压电复合材料的制备及性能

Preparation and Properties of PZT/Asphalt Based PiezoelectricComposites Used on Pavement

关键词:  锆钛酸铅/沥青压电复合材料  制备工艺  极化条件  压电性能  沥青路面

Key words:  lead zirconate titanate(PZT)/asphalt based piezoelectric composite  preparation process  polarization condition  piezoelectric property  asphalt pavement

摘要:

以锆钛酸铅PZT 5H为压电相，沥青为基体，采用热压成型法制备0 3型PZT/沥青压电复合材料.分析了此复合材料的制备工艺、极化条件及PZT的体积分数对压电应变常数d33的影响，测试了其介电性能，并完成了动态荷载作用下压电响应的测试.结果表明：优化的制备工艺为成型压应力10MPa，成型时间3min；最佳的极化条件是极化电场强度为3kV/mm，极化时间为10min，极化温度为50℃；PZT的最佳体积分数为75%；沥青基压电复合材料的相对介电常数εr及压电应变常数d33分别为3295和537pC/N，荷载响应稳态输出电压为72V，其储存的能量为2592μJ.

Abstract:

0 3 asphalt based piezoelectric composites suitable for use in asphalt pavement were prepared with PZT 5H as piezoelectric phase and asphalt as matrix with hot press molding method. The effect of preparation process, polarization conditions and the volume fraction of PZT 5H on the d33 value of the composites was studied. The dielectric properties of composites and its piezoelectric response under the dynamic loading were tested. The results indicate that the optimal volume fraction of PZT 5H is 75%, and the optimum molding pressure and molding time are 10MPa, and 3min, respectively. The optimal polarization conditions are 3kV/mm（poling field）,10min（poling time） and 50℃（poling temperature）. The highest values of εr and d33 are obtained to be 3295 and 537pC/N. The output voltage of 0 3 asphalt based piezoelectric properties under dynamic load is 72V and stored energy is 2592μJ.