Piezoactuators

Research : Smart Devices : Discrete Devices : Piezoactuators

Piezoactuators

PZT fiber composite laminate.

Diagram of a PZT fiber composite laminate.

Piezo-bow actuator.

Objective:

Design and fabrication of high displacement and high force actuators for applications including vibration suppression, shape-morphing, distributed actuation, energy harvesting and health monitoring..

Approach:

Metal – ceramic composite actuators.
Low – profile ceramic fiber composites.
Piezoelectric motors.

Accomplishments

“Piezo-Bow” actuator which exhibits high displacement and high blocking force at low frequencies was designed, analyzed and fabricated. The structure consist of a piezoelectric bar poled along the length with metal caps attached to the two major faces of the bar bounded by steel blocks.
In frequency ranges below 2 kHz, a linear displacement of 8 mm at an applied field of 3.3 V/mm was obtained. The actuator size was 7x7x30 mm³ and exhibited stresses of the order of 30 MPa.
Experiments are in progress to design and fabricate PZT fiber based composites which can provide high blocking force. Such actuators will find immediate applications in the power harvesting.

Publications:

[1]	S. Mukherjee, W. H. Lee, R. A. Islam, and S. Priya, “High Energy Density Piezoelectric Materials and Applications,” 2006 U.S. Navy Workshop on Acoustic Transduction Materials and Devices, The Penn State Conference Center, Pennsylvania, May 2006.
[2]	Miteshkumar Joshi and Shashank Priya, “'Piezo-Bow'—High Displacement and High Blocking Force Actuator", Integrated Ferroelectrics, Volume 82, Number 1 / 2006, pp. 25 - 43.
[3]	Ahn CW, Song HC, Nahm S, et al., " Effect of ZnO and CuO on the Sintering Temperature and Piezoelectric Properties of a Hard Piezoelectric Ceramic", Journal of the American Ceramic Society 89 (3): 921-925, Mar 2006.
[4]	Islam RA, Priya S, "Annealing and aging effect in 0.95 Pb(Zr0.52Ti0.48)O-3-0.05 NiFe1.9Mn0.1O4 Particulate Magnetoelectric Composites", Japanese Journal of Applied Physics Part 2-Letters & Express Letters 45 (4-7): L128-L131, Feb 2006.
[5]	Islam RA, Priya S, "Realization of High-energy Density Polycrystalline Piezoelectric Ceramics", Applied Physics Letters 88 (3): Art. No. 032903, Jan 16 2006.
[6]	Uppal N, Shiakolas PS, Priya S, "Micromachining of PZT using ultrafast femtosecond laser", Ferroelectrics Letters Section 32 (3-4): 67-77, 2005.
[7]	Ahn CW, Song HC, Nahm S, et al., "Effect of MnO2 on the piezoelectric properties of (1-x)(Na0.5K0.5)NbO3-xBaTiO(3) ceramics", Japanese Journal of Applied Physics Part 2-Letters & Express Letters 44 (42-45): L1361-L1364, 2005.
[8]	Priya S, Ahn CW, Nahm S, "Dielectric Properties of (Ba-0.6 Sr-0.4)(Cu-1/3 Nb-2/3)O-3 system", Ferroelectrics 322: 75-82, 2005.
[9]	Ahn CW, Song HC, Park SH, et al., "Low temperature sintering and piezoelectric properties in Pb(ZrxTi1-x)O-3-Pb(Zn1/3Nb2/3)O-3-Pb(Ni1/3Nb2/3)O-3 ceramics", Japanese Journal of Applied Physics Part 1-Regular Papers Short Notes & Review Papers 44 (3): 1314-1321, Mar 2005.