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Advanced Dielectric, Piezoelectric and Ferroelectric Properties of Materials
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Advanced Dielectric, Piezoelectric and Ferroelectric Properties of Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Electronic Materials".

Deadline for manuscript submissions: 10 September 2026 | Viewed by 1787

Special Issue Editors

Dr. Ru Guo

E-Mail Website
Guest Editor
Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China
Interests: dielectric; nanocomposite; interface design; capacitive energy storage; triboelectric/piezoelectric nanogenerator; energy harvesting; energy conversion
Dr. Mingyang Yan

E-Mail Website
Guest Editor
School of Integrated Circuits, Jiangnan University, Wuxi 214122, China
Interests: piezoelectric composites; porous ferroelectric materials; mechanical energy harvesting; multifunctional sensors

Special Issue Information

Dear Colleagues,

Advanced dielectric/piezoelectric/ferroelectric materials, as important functional materials, play a crucial role in electrical, acoustic, thermal, mechanical, and optical sensing and energy conversion devices and are widely used in high-tech fields such as electronic information technology, pulse power equipment, aerospace, ultrasonic diagnosis, non-destructive testing, and intelligent systems. We are pleased to announce a Special Issue dedicated to exploring cutting-edge developments in functional materials with exceptional dielectric, piezoelectric, and ferroelectric properties, showcasing innovative research driving progress in energy storage, energy harvesting, energy conversion, smart sensing, actuation, and microelectronics. This Special Issue includes—but is not limited to—the following areas:

  • Novel material (ceramics, polymers, composites, crystals, thin/thick film);
  • Advanced synthesis, fabrication, and processing techniques;
  • Theoretical modeling and structure-property relationships;
  • Property characterization and analysis techniques;
  • High-performance materials;
  • Applications in dielectric capacitive energy storage, piezoelectric transducers/sensors/actuators, ferroelectric memory devices, etc.;
  • Emerging applications in energy harvesting, IoT, and flexible electronics;
  • Multi-functional integrated devices and systems.

Full papers, communications, and reviews that address these themes are warmly welcomed. Together, we aim to provide a comprehensive overview of the current state and future directions of advanced dielectric/piezoelectric/ferroelectric materials research.

Dr. Ru Guo
Dr. Mingyang Yan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • dielectric
  • piezoelectric
  • ferroelectric
  • energy storage
  • energy harvesting
  • electrocaloric
  • sensing
  • actuation
  • electronics
  • fundamental principles

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Published Papers (4 papers)

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Research

17 pages, 1980 KB  
Article
Effect of Mn Addition on the Mechanical Properties and Ferroelectric Behavior of Bi0.5Na0.5TiO3 and 94(Bi0.5Na0.5TiO3)–6(BaTiO3) Ceramics
by Adriana Gallegos-Melgar, Jan Mayen and Maricruz Hernandez-Hernandez
Materials 2026, 19(6), 1092; https://doi.org/10.3390/ma19061092 - 12 Mar 2026
Viewed by 164
Abstract
The effect of Mn addition on the structural, dielectric, ferroelectric, and mechanical properties of Bi0.5Na0.5TiO3 (BNT) and 0.94(Bi0.5Na0.5TiO3)–0.06(BaTiO3) (BNT–BT) ceramics was systematically investigated under identical processing conditions. Powders were calcined [...] Read more.
The effect of Mn addition on the structural, dielectric, ferroelectric, and mechanical properties of Bi0.5Na0.5TiO3 (BNT) and 0.94(Bi0.5Na0.5TiO3)–0.06(BaTiO3) (BNT–BT) ceramics was systematically investigated under identical processing conditions. Powders were calcined at 750 °C for 2 h and 900 °C for 2 h, followed by sintering at 1060 °C for 5 h. Mn contents of 0.5 and 5 mol% were selected to represent low-level substitution and near-saturation regimes. XRD confirmed single-phase perovskite formation within laboratory detection limits, while Raman spectroscopy revealed Mn-induced lattice distortions. Low Mn addition (0.5 mol%) enhanced densification and improved remanent polarization in BNT–BT (Pr = 33.5 μC/cm2). In contrast, 5 mol% Mn promoted grain coarsening, increased porosity, and reduced functional performance. Mechanical properties evaluated using two-parameter Weibull statistics showed composition-dependent variations in characteristic hardness and elastic modulus. The results demonstrate that Mn-doping effects depend strongly on both dopant concentration and host-lattice structural state, distinguishing beneficial substitution from defect-saturation behavior in lead-free BNT-based ceramics. Full article
(This article belongs to the Special Issue Advanced Dielectric, Piezoelectric and Ferroelectric Properties of Materials)
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15 pages, 8733 KB  
Article
Spring-Induced Mechanical Strategy for High-Output, Flexible PAN-Based Piezoelectric Harvester
by Quan Hu, Yueyue Yu, Ru Guo and Hang Luo
Materials 2026, 19(5), 1039; https://doi.org/10.3390/ma19051039 - 9 Mar 2026
Viewed by 274
Abstract
The growing demand for wearable electronics and the Internet of Things (IoT) calls for flexible piezoelectric energy harvesters with substantially improved power output. Polyacrylonitrile (PAN) polymers, with their high polarization and excellent thermal stability, are among the most promising candidates for efficient flexible [...] Read more.
The growing demand for wearable electronics and the Internet of Things (IoT) calls for flexible piezoelectric energy harvesters with substantially improved power output. Polyacrylonitrile (PAN) polymers, with their high polarization and excellent thermal stability, are among the most promising candidates for efficient flexible piezoelectric materials. However, the performance of existing PAN-based harvesters remains limited, and strategies for further enhancing their output are still insufficiently explored. Herein, this study aims to overcome the output bottleneck of PAN-based PENGs by implementing a novel mechanical excitation strategy. Using electrospun flexible PAN-BaTiO3 nanocomposite films, we systematically compared the electromechanical responses under conventional compression and impact modes. Real-time synchronized force–current measurements in compression mode revealed that the output current increases progressively with drive frequency (2–10 Hz). Specifically, the PENG with PAN-20 wt.% BaTiO3 achieved a peak current of 0.33 mA at 10 Hz, showing an approximately 7.9-fold enhancement over its pure PAN counterpart. More importantly, under 6 Hz impact excitation, the device exhibited a remarkable output current density of 1.0 mA cm−2 and a peak power density of 256.5 µW cm−2. This current density is 95 times higher than that in compression mode at a comparable frequency and surpasses the performance of most recently reported piezoelectric and triboelectric nanogenerators. With an effective area of 16 cm2, the PENG could simultaneously illuminate up to 275 commercial LEDs or 100 individual bulbs and maintained stable operation over 63,530 cycles. This work overcomes the output bottleneck in low-frequency energy harvesting and provides an effective pathway toward practical energy-harvesting applications. Full article
(This article belongs to the Special Issue Advanced Dielectric, Piezoelectric and Ferroelectric Properties of Materials)
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13 pages, 2705 KB  
Article
Influence of Germanium Substitution on the Crystal Chemistry and Dielectric Properties of Mg2SnO4
by Yih-Chien Chen, Chun-Hsu Shen, Chung-Long Pan and Chun-Hao Tai
Materials 2025, 18(24), 5557; https://doi.org/10.3390/ma18245557 - 11 Dec 2025
Viewed by 362
Abstract
The effects of Ge4+ substitution on the microwave dielectric properties of inverse spinel Mg2SnO4 ceramics were systematically investigated. A series of Mg2(Sn1−xGex)O4 (x = 0.00–0.05) ceramics were synthesized via solid-state reaction and [...] Read more.
The effects of Ge4+ substitution on the microwave dielectric properties of inverse spinel Mg2SnO4 ceramics were systematically investigated. A series of Mg2(Sn1−xGex)O4 (x = 0.00–0.05) ceramics were synthesized via solid-state reaction and sintered at 1450–1600 °C. X-ray diffraction confirmed single-phase inverse spinel structures (Fd-3 m) for compositions up to x = 0.03, while minor MgSnO3 secondary phases appeared at x = 0.05. Rietveld refinement revealed a linear decrease in lattice parameter from 8.6579 Å (x = 0) to 8.6325 Å (x = 0.05), consistent with Vegard’s law for the substitution of smaller Ge4+ (0.53 Å, Shannon ionic radius, octahedral coordination) for Sn4+ (0.69 Å, Shannon ionic radius, octahedral coordination) in octahedral sites. Optimal dielectric properties were achieved at x = 0.03 sintered at 1550 °C; the dielectric constant (εr) increased from 7.6 to 8.0, while the quality factor (Qf) improved by 19% from 56,200 to 67,000 GHz, which is attributed to reduced phonon scattering from Ge-induced lattice contraction. The temperature coefficient of resonant frequency (τf) remained stable (−64 to −68 ppm/°C) across all compositions. Property degradation at x = 0.05 correlated with the onset of Ge4+ solubility limit and MgSnO3 formation. These results demonstrate that controlled Ge4+ substitution effectively enhances the microwave dielectric performance of Mg2SnO4 ceramics for communication applications. Full article
(This article belongs to the Special Issue Advanced Dielectric, Piezoelectric and Ferroelectric Properties of Materials)
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17 pages, 2988 KB  
Article
Effect of Ba:Ti Molar Ratio and Sintering Temperature on the Structural and Electrical Properties of BaTiO3-Type Solid Solutions, Synthesized by the Hydrothermal Method
by José Agustin Palmas Léon, Leandro Ramajo, Rodrigo Parra, Miguel Pérez Labra, Francisco Raúl Barrientos Hernández, Alejandro Cruz Ramírez, Vanessa Acosta Sanchez, Aislinn Michelle Teja Ruiz and Sayra Ordoñez Hernández
Materials 2025, 18(20), 4797; https://doi.org/10.3390/ma18204797 - 21 Oct 2025
Viewed by 694
Abstract
The results of the effect of the three Ba:Ti molar ratios (MR) (1:1, 2:1, 4:1) and four sintering temperatures (1250, 1275, 1300, 1325 °C) on the structural and electrical properties of BaTiO3 (BT)-type ceramics synthesized by the hydrothermal method are shown. The [...] Read more.
The results of the effect of the three Ba:Ti molar ratios (MR) (1:1, 2:1, 4:1) and four sintering temperatures (1250, 1275, 1300, 1325 °C) on the structural and electrical properties of BaTiO3 (BT)-type ceramics synthesized by the hydrothermal method are shown. The BT phase formed was analyzed by x-ray diffraction (XRD), Raman spectroscopy (RS), dielectric and ferroelectric measurements and high-resolution scanning electron microscopy (HRSEM). For the samples synthesized using a Ba:Ti MR of 4:1 and at all sintering temperatures analyzed, XRD results confirmed the presence of the tetragonal ferroelectric phase, BT. In the same way, these results corroborated the results obtained by the RS technique. Dielectric properties measured at 100 kHz and 1 MHz over a temperature range of 30 °C–200 °C indicated a relative permittivity value of 4280 at 1 MHz and 4200 at 100 KHz at a Curie temperature of 110 °C in both cases for the sample synthesized at with a Ba:Ti MR ratio of 4:1 and sintered at 1300 °C. Ferroelectric measurements for the samples showed a best remnant polarization (Pr) of 3.5 µC/cm2 for the sample synthesized with a Ba:Ti MR ratio of 4:1 and sintered at 1325 °C. The HRSEM results showed grains composed of Ba, Ti, and O homogeneously distributed in the BT structure, and a trend of increasing average grain size with increasing sintering temperature was observed. Full article
(This article belongs to the Special Issue Advanced Dielectric, Piezoelectric and Ferroelectric Properties of Materials)
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