Compare Soft PZT Materials

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			Soft PZT
	Symbols	Units	BM500	BM527	BM532
Electrical			Navy Type II	Navy Type V	Navy Type VI
Relative Dielectric Constant	KT33	---	1750	2750	3250
Dissipation Factor	Tan δ	%	1.6	2.0	2.0
Piezoelectric
Coupling Factor	kp	---	0.62	0.62	0.65
	k31	---	0.37	0.37	0.39
	k33	---	0.72	0.72	0.75
Charge Constant	d31	10-12 C/N	-175	-215	-270
	d33	10-12 C/N	365	500	590
Voltage Constant	g31	10-3 V·m/N	-11.5	-9.5	-9.0
	g33	10-3 V·m/N	25	22	20
Mechanical Quality Factor	QM	---	80	70	70
Frequency Constants2	Np	Hz·m	2050	2050	2000
	N1	Hz·m	1400	1400	1425
	N4	Hz·m	1800	1850	1850
Mechanical
Compliance	SE11	10-12 m2/N	15.5	14.5	14.0
	SE33	10-12 m2/N	19.0	19.5	20.0
Density	ρ	g/cm3	7.65	7.6	7.65
Curie Temperature	Tc	oC	360	225	210
Ageing Characteristics3 (% change/time decade)
Coupling Factor	kp	---	-0.5	-1.0	-1.0
Relative Dielectric Constant	KT33	---	-1.0	-1.0	-1.0
Frequency Constant	N4	Hz·m	0.5	1.0	1.0