Key Takeaways & Executive Findings
- •• Microstructural parameters such as thickness, porosity, Zr/Ti ratio, doping, grain size, grain boundaries, and orientation critically influence the dielectric, ferroelectric, and piezoelectric properties of PZT ferroelectric films. • Geometric structure (thickness and porosity) directly impacts electrical performance, with application-specific requirements dictating optimal dimensions and porosity. • Compositional adjustments (Zr/Ti ratio and doping) alter phase composition, thereby tuning ferroelectric and piezoelectric responses. • Grain structure (size, boundaries, orientation) affects domain dynamics and switching behavior, offering pathways for performance optimization in device design.
Abstract
Lead zirconate titanate (PbZrxTi1-xO3, PZT) ferroelectric films possess remarkable characteristics such as high residual polarization, high dielectric constant, and high piezoelectric coefficient and have great application prospects in modern electronics, communications, medical care, and military fields. At present, the microstructure changes of PZT ferroelectric thin films have a significant impact on their electrical properties. Therefore, this work summarizes the influences of geometric structure (thickness, porosity), composition structure (Zr/Ti ratio, doping), and grain structure (grain size, grain boundaries, orientation) on the electrical properties of PZT ferroelectric thin films. The results show that the changes in thickness and porosity have a significant impact on the electrical properties of PZT ferroelectric films. Especially, the actual application scenarios and preparation processes determine the required geometric dimensions and structures of PZT ferroelectric films. The Zr/Ti ratio and doping mainly affect the electrical properties by influencing the phase composition of PZT ferroelectric films. The changes in grain size, boundary structure, and orientation dependence mainly have a certain degree of influence on the domain response and domain switching behavior of PZT ferroelectric thin films. In conclusion, different structures have different influence effects on the dielectric, ferroelectric, and piezoelectric properties of PZT ferroelectric films. The way the tiny structure affects how PZT thin films work was shown, helping to guide the design of ferroelectric thin film devices. In order to further study and apply piezoelectric ceramic devices, it is crucial to have an in-depth understanding of the relationship between the structure and performance of piezoelectric ceramic devices.
1. Introduction
Ferroelectric materials have demonstrated excellent application prospects in memory devices, microactuators, and microsensors in recent years [1–6]. With regard to modern electronics, communications, medical, and military fields, lead zirconate titanate (PbZrxTi1-xO3, PZT) films in particular have a wide range of applications due to their large piezoelectric coefficient, high Curie temperature, significant dielectric constant, and high remanent polarization [7–13]. PZT materials are known to exhibit a conventional ABO3 perovskite structure, wherein A is filled by +2 valent metal ions (such as Pb) and B by +4 valent metal ions (such as Ti, Zr) [14]. PZT, a high-performance material with exceptional ferroelectric and electromechanical capabilities, is created by the solid solution of PbZrO3 and PbTiO3 in various ratios, particularly the Zr/Ti structure close to tetragonal and rhombohedral phase boundary [15]. The microstructure of PZT materials varies in different Zr/Ti ratio ranges. Different electrical and physical properties can be acquired by modifying such structures, allowing PZT ceramic components to be widely suited to a variety of operating situations. PZT materials, first introduced as a binary system by Jaffe et al. in 1954, have rapidly gained widespread usage in the field of electro-mechanical transformation [16].
Consequently, there has been a surge in interest and attention from researchers about the usage of piezoelectric ceramics as building materials to create various kinds of thin films for high-quality electronic devices. A wearable, highly skin conformal hybrid piezoelectric-friction electric sensor composed of lead-zirconate-titanate and polydimethylsiloxane (PZT&PDMS) composite film (m-PZT&PDMS) composite sheets was disclosed by Yu et al [17]. A suitable amplified sensor device with improved piezoelectric response (0.005 Pa-level sensitivity and 0.1 ms reaction time) for skin pressure monitors was introduced by Rogers et al. [18] With a good output record (−8.15 V and −
Loading authentic research manuscript (Pages 1–5)...
Hefa Zhu, Zhiguo Xing, Haidou Wang, Longlong Zhou, Wei Peng, Qingbo Mi, Han Dong, Weiling Guo (2025). Research Progress of Microstructure Regulation on the Electrical Properties of PZT Ferroelectric Films. Chinese Journal of Mechanical Engineering. https://doi.org/10.1186/s10033-025-01303-w
Research & Educational Purpose Only:The translations, structured abstracts, analytical annotations, and data reports provided by SinoTechIntel are intended exclusively for academic research, internal corporate R&D, and educational benchmarking. They do not constitute formal engineering, chemical safety, legal, or professional advice.
Copyright & Intellectual Property Notice: Original copyright of the underlying source articles and experimental data remains with the respective authors, institutions, and original publishing journals. SinoTechIntel claims intellectual property only over its proprietary translations, analytical syntheses, and AEO structured enhancements in accordance with international fair use and academic citation principles.
Frequently Asked Questions
What are the key microstructural factors affecting the electrical properties of PZT ferroelectric films?
The key factors include geometric structure (thickness, porosity), composition structure (Zr/Ti ratio, doping), and grain structure (grain size, grain boundaries, orientation). These factors influence dielectric, ferroelectric, and piezoelectric properties.
How does thickness and porosity impact PZT film performance?
Thickness and porosity significantly affect electrical properties. Optimal thickness and porosity are determined by application scenarios and preparation processes, influencing capacitance, leakage current, and mechanical flexibility.
What role does Zr/Ti ratio and doping play in PZT films?
Zr/Ti ratio and doping alter the phase composition, which in turn tunes ferroelectric and piezoelectric responses. For instance, near the morphotropic phase boundary, enhanced piezoelectric coefficients are observed.
How do grain size and orientation affect domain switching in PZT films?
Grain size and orientation influence domain wall mobility and switching behavior. Smaller grains can lead to higher coercive fields, while preferred orientation can enhance piezoelectric response.
What are the practical applications of PZT ferroelectric films?
PZT films are used in memory devices, microactuators, microsensors, wearable sensors, and energy harvesting devices due to their high piezoelectric coefficient and ferroelectric properties.
Related Technical Papers & Translations
Direct Repair of the Crystal Structure and Coating Surface of Spent LiFePO4 Materials Enables Superfast Li-Ion Migration
The rapid accumulation of spent LiFePO4 (LFP) cathodes from retired lithium-ion batteries necessitates the development of effective and environmental-friendly recycling strategies. In this context, direct regeneration has emerged as a promising approach for reclaiming LFP cathode materials, offering a streamlined pathway to restore their electrochemical functionality. We report an integrated regeneration protocol that simultaneously repairs the degraded crystal structure and reconstructs the damaged carbon coating in spent LFP. The regenerated cathode material had superfast lithium-ion diffusion kinetics and a stable cathode–electrolyte interface, giving a remarkable rate capability with specific capacities of 122 mAh g−1 at 5C and 106 mAh g−1 at 10C (1C = 170 mA g−1). It also maintained capacities of 110.7 mAh g−1 (5C) and 84.1 mAh g−1 (10C) after 400 cycles. It could be used in harsh environments and could be stably cycled at subzero temperatures (−10 and −20 °C) and in solid-state electrolyte batteries. Life cycle assessment combined with economic evaluation using the EverBatt model reveals that this direct regeneration approach has high economic and environmental benefits.
Oxide Semiconductor for Advanced Memory Architectures: Atomic Layer Deposition, Key Requirement and Challenges
Oxide semiconductors (OSs), introduced by the Hosono group in the early 2000s, have evolved from display backplane materials to promising candidates for advanced memory and logic devices. The exceptionally low leakage current of OSs and compatibility with three-dimensional (3D) architectures have recently sparked renewed interest in their use in semiconductor applications. This review begins by exploring the unique material properties of OSs, which fundamentally originate from their distinct electronic band structure. Subsequently, we focus on atomic layer deposition (ALD), a core technique for growing excellent OS films, covering both basic and advanced processes compatible with 3D scaling. The basic surface reaction mechanisms—adsorption and reaction—and their roles in film growth are introduced. Furthermore, material design strategies, such as cation selection, crystallinity control, anion doping, and heterostructure engineering, are discussed. We also highlight challenges in memory applications, including contact resistance, hydrogen instability, and lack of p-type materials, and discuss the feasibility of ALD-grown OSs as potential solutions. Lastly, we provide an outlook on the role of ALD-grown OSs in memory technologies. This review bridges material fundamentals and device-level requirements, offering a comprehensive perspective on the potential of ALD-driven OSs for next-generation semiconductor memory devices.
Laser powder bed fusion of biodegradable Zn-4Cu alloy: Processing, microstructure and properties
Zn's natural degradability and biocompatibility make it a promising candidate for implants, however, its mechanical properties remain insufficient for bone applications. In this study, the performance of Zn was enhanced by developing Zn-Cu alloys via laser powder bed fusion (LPBF). Optimal LPBF parameters for forming stable tracks were achieved by adjusting laser power and scanning speed. Under optimized conditions of 100 W and 100 mm/s, high-density (99.58%) Zn-Cu alloys with improved hardness (68.2HV) and yield strength (160 MPa) were achieved. These improvements are attributed to solid solution strengthening, segregation strengthening, and grain refinement. The Zn-Cu alloys also demonstrated favorable degradation behavior, with a rate of 0.16 mm/year. This degradation is primarily driven by micro-galvanic corrosion between the CuZn5 phase and Zn matrix, along with refined grains and increased grain boundary density. This work demonstrates a viable strategy for fabricating Zn-based implants with enhanced structural integrity and mechanical performance via LPBF.