Chinese Researchers Breakthrough Classic Trade-Off In Piezoelectric Ceramics Using Innovative B-Site Lattice Distortion Strategy

Shanghai researchers develop a B-site lattice distortion strategy to simultaneously improve piezoelectric coefficients and Curie temperatures in ceramics.

By: AXL Media

Published: Apr 30, 2026, 9:33 AM EDT

Source: Information for this report was sourced from EurekAlert!

Overcoming The Traditional Limitations Of Energy Conversion

The development of high-performance piezoelectric ceramics has historically been hindered by the intrinsic interdependence of their physical properties. In most systems, increasing the piezoelectric coefficient often results in a detrimental decrease in the Curie temperature or an increase in dielectric loss. According to Professor Ruihong Liang from the Shanghai Institute of Ceramics, this classic trade-off has long been a central challenge in the field. The recent study published in the Journal of Advanced Ceramics introduces a multicomponent B-site strategy that acts as a physical balancer, allowing for the concurrent optimization of parameters that were previously thought to be antagonistic.

The Seesaw Mechanism Of Atomic Substitution

The innovative approach utilizes the chemical compound Pb(Mg1/3Nb2/3)O3, referred to as PMN, to act as a molecular seesaw within the crystal lattice. By integrating PMN into a PNN-PZT matrix, the researchers leveraged the slightly larger ionic radius of magnesium to induce subtle distortions in the BO6 oxygen octahedra. These structural shifts effectively amplify the intrinsic contribution to the material's piezoelectric response. This precise lattice engineering allows the ceramic to maintain a high Curie temperature while simultaneously achieving superior electromechanical coupling.

Mitigating Domain-Wall Pinning Through Controlled Growth

At the microscopic level, the performance of these ceramics is dictated by the behavior of ferroelectric domains. When domains are excessively small, they become susceptible to domain-wall pinning, which saps energy and increases dielectric loss. The research team discovered that adding specific amounts of PMN promotes the growth of these domains under conditions of preserved disorder. These moderately enlarged domains reduce the overall density of domain walls, thereby mitigating pinning effects and ensuring a higher electromechanical coupling coefficient alongside low dielectric loss.