Head office
SECO Sensor Consult GmbH
Am Bleichanger 1
96450 Coburg
Phone: +49 (0)9561 869 141
Fax: +49 (0)9561 869 149
Email: info@seco-sensor.de
Lead-free ultrasonic transducers as an alternative to lead zirconate titanate (PZT)
In addition to our standard products featuring a piezoceramic disc made from PZT (lead zirconate titanate), we now offer lead-free ultrasonic transducers made from KNN (potassium sodium niobate), thereby expanding our product range. We are currently working with prototypes in the standard operating frequencies of 300 and 400 kHz. On request, we are also happy to develop solutions suitable for series production in other frequency ranges in collaboration with our customers.
A comparison – leaded PZT vs. lead-free KNN
PZT: Our proven gold standard
… and full piezoelectric power.
- Very good piezoelectric properties
- Perfectly suited for use in ultrasonic sensors and actuators
- Reliable, robust, proven in numerous industrial sectors
- More cost-effective due to many years of series production
KNN: A promising extension
… as a lead-free option
- currently more cost-intensive than PZT due to low quantities
- similar piezoelectric properties in certain temperature ranges
- Positive experience in practical workability
The advantages: lead-free KNN is…
Compatible
Depending on the measuring task and temperature application range, we can replace standard PZT converters with a similar KNN product
Efficient
For certain industrial measurement applications, we offer similarly high-performance KNN ultrasonic transducers. We are also happy to develop and provide samples in collaboration with our customers.
Ecological
Due to its lead-free composition, KNN can offer an ecological alternative in the long term.
Lead-free ultrasonic transducers – further information and future outlook
In the world of piezoceramic materials, lead zirconate titanate (PZT) and potassium sodium niobate (KNN) are two prominent materials. Whilst PZT is widely used due to its outstanding piezoelectric properties, KNN is increasingly becoming the focus of research and development as a lead-free alternative for radially coupled transducer designs.
Challenges:
Due to the small production volumes, the manufacture of KNN is currently even more complex, energy-intensive and costly than the production of PZT. Furthermore, active research is still being carried out into optimising the material properties of KNN. A 1:1 replacement of PZT with KNN is unlikely due to the physical properties of the system. The production of KNN is currently more energy-intensive than that of PZT. However, with the transition to mass production in large quantities, economies of scale can be utilised, which will significantly improve the energy and economic balance of KNN.
Future prospects:
In the coming years, KNN is expected to play an increasingly important role as a more environmentally friendly and sustainable alternative. Research and development in this area will be crucial to further improve the performance and cost-effectiveness of KNN and to promote its use in industry.
Environmental protection and sustainability have always been at the heart of our environmental policy. We are therefore delighted to support our customers as they make the switch to lead-free alternatives. We would be happy to advise you in this area and work with you to develop bespoke, lead-free solutions for your specific application.
