Damage Detection Test of GFRP Composite Civil Materials Based on Piezoelectric Ceramic Sensors

Table 1

Main performance parameters of piezoelectric ceramic sensors.

Density (g·cm^-3)	Dielectric constant	Electromechanical coupling coefficient	Capacitance (nF)	Curie temperature (°C)	Mechanical quality factor
7.5	1600	1.65	3.77	300	80