Multiscale Structural Modulation and Synergistic Enhancement of Transparency and Relaxor Behavior in La3+-Doped KNN Lead-Free Ceramics

Nanomaterials 2026 Open access

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Authors: Xu Yang, Lingzhi Wang, Li Luo, Wenjuan Wu, Bo Wu, Junjie Li, Jie Li, Tixian Zeng, Gengpei Xia
DOI: 10.3390/nano16020149
Cited by: 2
References: 30

Abstract

Lead-free transparent ferroelectric ceramics with integrated opto-electro-mechanical functionalities are pivotal for next-generation multifunctional devices. In this study, K0.48Na0.52NbO3-xLa2O3 (KNN-xLa, x = 0.005 − 0.04) ceramics were fabricated via a conventional solid-state route to investigate the La3+-induced multiscale structural evolution and its modulation of optical and electrical properties. La3+ substitution drives a critical structural transition from an anisotropic orthorhombic phase (Amm2) to a high-symmetry pseudocubic-like tetragonal phase (P4mm) for x ≥ 0.025, characterized by minimal lattice distortion (c/a = 1.0052). This enhanced structural isotropy, coupled with submicron grain refinement (

Fields of Study & Subjects

Ferroelectric and Piezoelectric Materials Advanced Sensor and Energy Harvesting Materials Dielectric materials and actuators

Publication details

Journal / source
Nanomaterials
Publisher
MDPI AG
Volume
16
Issue
2
Pages
149–149
Publication date
22 January 2026
Language
EN