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A new structure of piezoelectric motor is studied, which is driven by ultrasonic power. The motor is composed of a threaded nut and screw. The piezoelectric ceramic is pasted to the nut. The nut will vibrate, similarly to the kind of a ??Hula Hoop motion??, under the driven of ultrasonic power. Then the vibration becomes a linear motion by the fiction of the screw and the nut. Based on the theory...
A miniature disk-pivot piezoelectric motor with double rotors using a vibration mode B11 of one nodal circle and one nodal diameter was designed and fabricated. A disk-pivot structure is used to simulate the wobble vibration and an embedded metal cylinder is used to amplify the displacement to obtain a higher rotation velocity. The structure of the stator is analyzed by using Finite Element Method...
This paper theoretically researches the application that ultrasonic standing waves are used to generate force on particles within fluid and the trajectory of the particles is given with numerical solutions. Based on this theory a device has been fabricated in pyrex to manipulate particles which are concentrated in the cavity and an experiment system is established. The experiment was accomplished...
Lead-free (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3 (KNLNTS) piezoelectric ceramics were synthesized by the NaCl-KCl (NaCl/KCl=1/1) molten salt synthesis (MSS) method. The KNLNTS ceramics was fabricated successfully by sintering at 1100degC to 1200degC. The results show that the KNLNTS powder particle size increased form 50 nm to 200 nm and the shape changed from cubic structure to plated-like structure...
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