Material characteristics | Hysteresis | Creep | Linearity | Thermal properties | Power dissipation. It is widely acknowledged that PZT materials are UHV compatible. When stacking such PZT elements the use of glue, solder, flux and wires could compromise the otherwise inherent compatibility for device level products. It is the purpose of this paper to give an estimate on outgassed species and rate from a Noliac Stacked Ceramic Multilayer Actuator (SCMA). For this purpose a SCMA consisting of 4 CMA’s and 2 endplates has been prepared. The overall dimensions of the SCMA are 5mm x 5mm x 10mm, having 5 glue joints each of 20mm length. The SCMA was equipped with standard buswire and 2 Kapton coated multi-core wires of 200mm length each. Cleaning:The excess glue is mechanically removed during the stacking process and during the curing.
Test conditions: The outgassing test was performed at Outgassing Services International, in accordance with the ASTM E 1559 measurement method. PWC-2003-TC3-022.pdf (application/pdf Object) Diamond_actuator_for_aerospace.pdf (application/pdf Object) Flextensional_piezoelectric_actuation.pdf (application/pdf Object) Electroactive polymers. (a) Cartoon drawing of an EAP gripping device. (b) A voltage is applied and the EAP fingers deform in order to surround the ball. (c) When the voltage is removed the EAP fingers return to their original shape and grip the ball.
Electroactive polymers, or EAPs, are polymers that exhibit a change in size or shape when stimulated by an electric field. The most common applications of this type of material are in actuators and sensors. History[edit] The field of EAPs emerged back in 1880, when Wilhelm Röntgen designed an experiment in which he tested the effect of an electrical current on the mechanical properties of a rubber band.[2] The rubber band was fixed at one end and was attached to a mass at the other.
Polymers that respond to environmental conditions other than an applied electrical current have also been a large part of this area of study. The next major breakthrough in EAPs took place in the late 1960s. Types of Electroactive Polymers[edit] Dielectric EAPs[edit] Ionic EAPs[edit]