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SHEN Xing
FENG Wei
College of Aerospace Engineering,
Nanjing University of Aeronautics
and Astronautics,
Nanjing 210016, China |
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FABRICATION AND
PROPERTIES OF ANTIFERROELECTRIC RAINBOW ACTUATOR*
Abstract:
A new type of large-displacement actuator called reduced and internally biased oxide wafer (RAINBOW) is fabricated by chemical reduction of Pb(Sn, Zr, Ti)O3(PSZT) antiferroelectric ceram-ics and its properties are investigated. It is found that PSZT is easily reduced and the optimal conditions for producing RAINBOW samples are determined to be 870 ℃ for 2~3 h. The antiferroelectrics- ferroelectrics phase transitions occur at lower field strength in RAINBOW actuators compared with normal PSZT actuators. Large axial displacements are also obtained from the RAINBOW actuator by application of electric fields exceeding the phase switching level. However, the field-induced displacement of the RAINBOW actuator is dependent on the manner of applying load on the samples.
Key words:
Actuator Reduction Antiferroelectric ceramic Phase switching |