Piezo electric materials
Piezo-mechanics is to some extent is an "art of compromise", when selecting a suitable material for a distinct application.ĭeveloping new piezo-materials is a steadily ongoing process in the ceramic industry. Unfortunately, not all desirable properties can be put into a distinct piezo compound. The PZT- formulation can be varied with a variety of dopants allowing for a broad spectrum of material properties optimized for different application profiles. This compound class shows much better piezo-electrical and piezo-mechanical efficiency than naturally occurring piezoelectric materials such as quartz. APC’s primary hard pizeo materials are APC 840, 841, and APC 880.ĪPC’s 840, 841, 850, 854, 855, and 880 piezo materials are all proudly manufactured in the United States of America.ĪPC's piezoelectric ceramics are generally manufactured from PZT (Pb - lead, Zr - zirconium, Ti - titanium).
This combination of properties makes hard piezo materials ideal for many high power applications. APC’s primary soft pizeo materials are APC 850, APC 854 and APC 855.Ī hard piezo material exhibits: smaller piezoelectric constants, lower permittivity, smaller dielectric constants, lower dielectric losses, smaller electromechanical coupling factors, high mechanical quality factors, a higher coercive field, better linearity, and is harder to depolarize. This combination of properties makes soft piezo materials ideal for many sensing applications. APC’s piezoelectric materials are known in the industry for their purity and low variability in mechanical and electrical properties.ĪPC’s piezo materials fall into two broad categories: hard piezo material and soft piezo material.Ī soft piezo material exhibits: larger piezoelectric constants, higher permittivity, larger dielectric constants, higher dielectric losses, larger electromechanical coupling factors, low mechanical quality factors, a lower coercive field, poor linearity, and is easier to depolarize. Having a consistent piezoelectric material is important to the development and production of piezo devices. Frequency: ±5% (to ☐.5% on request) Background on APC's Piezo Materials Standard Electrical Tolerances (Tighter tolerances avaliable on request) **Maximum operating temperature = Curie point/2.
Maximum voltage:5-7 VAC /mil for 850, 851, 855, Type VI VDC Note: measurements made 24 hours after polarization. In practice, piezoelectric materials show varying values depending on their thickness, actual shape, surface finish, shaping process and post-processing. They are for reference purposes only and cannot be applied unconditionally to other shapes and dimensions. The values listed above pertain to test specimens. Piezoelectric Charge Constant (10 -12 C/N or 10 -12 m/V) Piezoelectric Voltage Constant (10 -3 Vm/N or 10 -3 m 2/C)
#Piezo electric materials pdf#
Physical and Piezoelectric Properties of APC Materialsĭownload Materials Chart as PDF APC Material:ĭielectric Dissipation Factor (Dielectric Loss (%)*