Research on improving Ultrasonic Transducer efficiency by wave propagation method

With the advance of technology, piezoelectric transducer with the advantages of low noise, light pain, and well comfortable become more and more popular than electromagnetic motor-driven transducer. Due to low cutting, ultrasonic transducer does not have the advantages of cutting quantity for hard tissue. The purpose of this research is to promote tip displacement and power of ultrasonic transducer.this research is focused on promoting efficiency of piezoelectric transducer, and the main method is that wave propagation is excited by piezoelectric is able to transmit to cutting edge, improving efficiency methods is including (1) improving surface roughness between piezoelectric ceramic. (2) improve Dynamic Electro Mechanical Coupling Coefficient of piezoelectric ceramic by adhesive method, and (3) improving and promoting the transmission of energy to cutting edge.
In the way of improving surface roughness between piezoelectric ceramic, we fill silver adhesive between piezoelectric ceramic, and the roughness would be improved by silver adhesive. Then we change the kind of silver adhesive to find the best parameter to promote the displacement of transducer. We find out displacement could be promoted 36% by silver adhesive and the temperature could be reduce about 10℃ by using silver adhesive with heating. In the way of improve Dynamic Electro Mechanical Coupling Coefficient of piezoelectric ceramic by adhesive method, we fill isolation adhesive between piezoelectric ceramic, the purpose is that promoting Dynamic Electro Mechanical Coupling Coefficient of piezoelectric ceramic by proper sort and thickness of adhesive. We find out the EMCC could be promoted 8% by using of high hardness AB adhesive 0.5 mm. In the way of improving and promoting the transmission of energy to cutting edge, if we could reflect the energy before it pass through fixed plane, the energy would not be wasted at fixed plane. We find out the stainless steel mesh could improving the displacement of tip 60% and output power of cutting 115% exactly. But it has disadvantage of higher temperature of piezoelectric ceramic. If we could cool temperature effectively, the reflector is helpful to promote displacement of tip.