Lead-Free Piezoceramics and the Further Development of Array Technology in Focus
The Phased Array Subcommittee of the German Society for Non-Destructive Testing (DGZfP) convened at SONOTEC GmbH on February 19, 2026. The meeting focused on current challenges in standardization as well as potential regulatory changes with far-reaching implications for ultrasonic testing.
The meeting was chaired by the Chairman of the Subcommittee, Andreas Mück (SONOTEC GmbH), together with his Deputy, Dr. rer. nat. Till Schmitte (Salzgitter Mannesmann Forschung GmbH). A total of 12 members and two guests participated – eight on site in Halle and six attending online. The strong participation highlights the current momentum within the field.
Standards Under Review
Against the backdrop of the scheduled revision of existing standards, the committee discussed specific proposals for improving array technology regulations. The objective is to further develop standards in a practical and application-oriented manner. The consolidated proposals will be submitted to the responsible standardization bodies.
Technological Impact of Potential EU Regulation
Another key topic was the European RoHS Directive, which currently provides a time-limited exemption allowing the use of lead-containing piezoceramics in ultrasonic testing. As this exemption is expected to expire in the future, there is already a clear need to develop suitable lead-free alternatives.
The discussion highlighted the significance of this regulatory framework: for many testing applications, technically equivalent lead-free solutions are not yet available. The subcommittee is supporting this transition from a technical perspective, coordinating with other European NDT societies and planning a survey on the practical use of relevant materials.
Practical Applications and Professional Exchange
The ultrasonic testing of thin-walled components using phased array technology was also addressed. The discussion built upon a widely recognized technical article published in the ZfP Magazine (April 2025).
The meeting concluded with a company tour at SONOTEC, including insights into additive manufacturing.
The next meeting of the DGZfP Phased Array Subcommittee will take place on November 10, 2026, in Magdeburg.