תמונות העטיפה

Dielectric Properties of Composite PZT Films with Distinct Phase-Transition Temperatures via Aerosol Deposition

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הוצא לאור ב:Materials vol. 18, no. 7 (2025), p. 1427
מחבר ראשי: Ye-Ji, Son
מחברים אחרים: Kim, Seung-Wook, Hyo-Min, Kim, Kim, Hyojung, Chu, Baojin, Dae-Yong, Jeong
יצא לאור:
MDPI AG
נושאים:
United States > US
Electronics
Dielectric properties
Curie temperature
Transition temperature
Thermal stability
Deposition
Interdiffusion
Temperature
Chemical reactions
Ferroelectric materials
Room temperature
Aerosols
Ceramics
Phase transitions
Portable equipment
Electrical properties
Particle size
Ferroelectricity
Lead zirconate titanates
Composition
High temperature
Morphology
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Resumen:With the increasing demand for ceramic-based capacitors in energy storage and electronics, ferroelectrics have gained attention due to their high dielectric coefficient. However, near the phase-transition temperature, a significant variation in dielectric coefficient leads to reduced temperature stability and degradation of electrical properties, limiting their applications. To address this, composite films with multiple phase-transition temperatures can provide a stable dielectric response over a broad temperature range. Conventional ceramic processing cannot achieve this due to interdiffusion during high-temperature sintering. To overcome this, we utilized the aerosol deposition (AD) process, which enables the fabrication of high-density ceramic films at room temperature while preserving the distinct Curie temperatures (Tc) of different compositions. We prepared composite films with three PZT compositions: Pb(Zr0.2Ti0.8)O3, Pb(Zr0.52Ti0.48)O3, and Pb(Zr0.8Ti0.2)O3. Compared to single-phase Pb(Zr0.52Ti0.48)O3, the composite film exhibited a higher dielectric coefficient with reduced variation across a broad temperature range due to overlapping phase transitions. The AD-fabricated composite PZT films offer enhanced thermal stability, making them suitable for temperature-sensitive applications such as compact power electronics and portable devices.
ISSN:1996-1944
DOI:10.3390/ma18071427
Fuente:Materials Science Database