Lead-free ultrasonic transducers as a supplement to lead zirconate titanate (PZT)
In addition to our standard products with a piezoceramic disk made of the material PZT (lead zirconate titanate), we offer lead-free ultrasonic transducers made of the material KNN (potassium sodium niobate), thereby expanding our product portfolio. We are currently working with prototypes in the common 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 cooperation 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
We offer similarly powerful KNN ultrasonic transducers for certain industrial measuring tasks. We are also happy to develop and sample in cooperation 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 forecast
In the world of piezoceramic materials, lead zirconate titanate (PZT) and potassium sodium niobate (KNN) are two prominent players. While PZT is widely used due to its outstanding piezoelectric properties, KNN is increasingly becoming the focus of research and development as a potentially more environmentally friendly alternative for radially coupled transducer designs.
Challenges:
The production of KNN is currently more complex, energy-intensive and costly than the production of PZT due to the small quantities involved. In addition, active research is still being carried out to optimize the material properties of KNN. A 1:1 replacement of PZT by KNN is unlikely due to the physical properties of the system. However, the transition to mass production in large quantities can greatly improve the energy and economic balance in the future.
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 therefore look forward to supporting our customers in the transition to lead-free alternatives. We would be happy to advise you in this area and work with you to develop individual, lead-free solutions for your customer-specific application.
