Improved electrical properties of potassium-sodium niobate piezoceramics owing to micron-sized non-uniform structure

Li, Anjiang; Tan, Liumao; Wang, Xingcheng; Zhu, Wenjun

doi:10.1016/j.jallcom.2021.161688

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…A higher d 33 value of 128 pC N À1 along with a k p of 0.41 were achieved in the KNN-ZN system; moreover, better knowledge the energy-band structure of the system was studied using a density functional theory (DFT) approach. 207 Recently, Song et al reached temperature stability in the range of 25-150 1C along with a higher piezoelectricity d 33 = 508 pC N À1 and a piezoelectric strain of 0.18% by adopting a facile approach with doping by Li and Sb in the monoclinic KNN ceramic, which is greater compared with other KNN composites. 208 The parallelism between electrical poling (DC loaded) and unipolar cycling together in lead-free and lead-based piezoelectric materials has already been demonstrated in the literature.…”

Section: Materials Advances Reviewmentioning

confidence: 99%

A critical review: the impact of electrical poling on the longitudinal piezoelectric strain coefficient

et al. 2022

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Section: Materials Advances Reviewmentioning

confidence: 99%

A critical review: the impact of electrical poling on the longitudinal piezoelectric strain coefficient

et al. 2022

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“…In our previous work, the copped oxide on the KNN particle is a cost-effective method to enhance the property of the ceramic, thanks to the rich interface effect at the nanoscale. 19 Therefore, in the work, the oxides of CuO, Fe 2 O 3 , ZnO and Al 2 O 3 are added on the surface of the KNN particle using first liquid phase mixing, then in situ decomposition and finial conventional solid-reaction sintering method. The merit of such preparation is to increase the contact area between the oxides and KNN.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the E B for KNN‐based ceramics increases to some extent. In our previous work, the copped oxide on the KNN particle is a cost‐effective method to enhance the property of the ceramic, thanks to the rich interface effect at the nanoscale 19 …”

Section: Introductionmentioning

confidence: 99%

Breakdown performance of potassium‐sodium niobate piezoceramics copped with oxides

Li,

Zhang,

et al. 2023

Int J Applied Ceramic Tech

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In the work, the CuO, Fe2O3, ZnO, and Al2O3 are doped in the potassium‐sodium niobate (KNN) to investigate their effects on the breakdown strength (EB) through in situ decomposition reaction on the KNN particles. The results suggest that the EB increases to some extent, thanks to the addition of oxides. Particularly, the addition of ZnO improves the EB by 34.08% compared with pure KNN ceramics. The X‐ray diffractometry, SEM, temperature‐dependent dielectric constant, complex impedance spectrum, breakdown strength test, and energy band structure are employed for the EB investigation. The addition of Fe2O3 and Al2O3 can reduce the grain size of ceramics while CuO leads to grain growth. The relative density, dielectric constant, activation energy (Ea), and relaxation time (τ) of the ceramics are enhanced by the addition of Fe2O3, ZnO and Al2O3. Among these factors, the relative density is helpful for the improvement of the EB. Additionally, the featured energy band structure contributes to such improvement.

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“…11,12 Compared to traditional piezoelectric materials, piezoelectric polymers offer distinct advantages, including their lightweight nature, and the ability to be processed into large-area films with favorable mechanical and physical properties, rendering them suitable for use in sensors, transducers, and various sensing devices. [13][14][15] Nevertheless, piezoelectric polymers still exhibit certain limitations, primarily in terms of their lower piezoelectric performance compared to inorganic piezoelectric ceramics. 16 To harness the strengths of both materials and achieve flexible films with strong piezoelectric output properties, 17 in this work, sodium niobate (NN) was added in P(VDF-TrFE) to prepare composite films.…”

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confidence: 99%

Improved Piezoelectric Output Performance of NN-P(VDF-TrFE) Piezoelectric Composite Film

Wang,

Yang,

Zhang

et al. 2023

ECS J. Solid State Sci. Technol.

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Sodium niobate (NN) particles were prepared through the hydrothermal method. NN-P(VDF-TrFE) composite films with different weight ratios of NN were prepared via the casting method. The microstructure and performance of the films were investigated systematically. The results showed that the 2 wt% NN-doped P(VDF-TrFE) film had the best mechanical properties, while the 6 wt% NN-doped P(VDF-TrFE) film exhibited the best electrical performance with an output voltage of ~5.2 V. Furthermore, the sodium niobate ceramic prepared by the solid-state reaction method and poled at DC field, was utilized to prepare the composite film for comparison. The results indicated that the P(VDF-TrFE) was of great importance for output performance. Under an electric field, NN particles interacted with the P(VDF-TrFE), especially transforming the non-polar α phase of the P(VDF-TrFE) into the polar β phase, and hence enhancing the output of the composite film.

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Improved electrical properties of potassium-sodium niobate piezoceramics owing to micron-sized non-uniform structure

Cited by 6 publications

References 26 publications

A critical review: the impact of electrical poling on the longitudinal piezoelectric strain coefficient

A critical review: the impact of electrical poling on the longitudinal piezoelectric strain coefficient

Breakdown performance of potassium‐sodium niobate piezoceramics copped with oxides

Improved Piezoelectric Output Performance of NN-P(VDF-TrFE) Piezoelectric Composite Film

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