Improvement of piezoelectricity of (Na, K)Nb-based lead-free piezoceramics using [001]-texturing for piezoelectric energy harvesters and actuators

Go, Su‐Hwan; Kim, Hero; Kim, Dae-Su; Eum, Jae‐Min; Chae, Seok‐June; Kim, Young Ho; Nahm, Sahn

doi:10.1016/j.jeurceramsoc.2022.06.078

Cited by 29 publications

(39 citation statements)

References 59 publications

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“…However, because their piezoelectricity is still low, several studies have attempted to enhance it. The formation of polymorphic phase boundary (PPB) structures such as tetragonal-orthorhombic (T-O), orthorhombic-rhombohedral (O-R), T-R, and T-O-R structures has been used to enhance the piezoelectricity of KNN-related piezoceramics [15][16][17][18][19][20][21][22]. Particularly, the KNN-related piezoceramics with an ideal T-O-R structure, where each structure has an identical proportion of approximately 33%, have been reported to show a very large d 33 value [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…The formation of polymorphic phase boundary (PPB) structures such as tetragonal-orthorhombic (T-O), orthorhombic-rhombohedral (O-R), T-R, and T-O-R structures has been used to enhance the piezoelectricity of KNN-related piezoceramics [15][16][17][18][19][20][21][22]. Particularly, the KNN-related piezoceramics with an ideal T-O-R structure, where each structure has an identical proportion of approximately 33%, have been reported to show a very large d 33 value [20][21][22]. However, as the ε T ij value of KNN-related piezoceramics with the ideal T-O-R structure is generally large, their k ij and d ij × g ij values are relatively low [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, the KNN-related piezoceramics with an ideal T-O-R structure, where each structure has an identical proportion of approximately 33%, have been reported to show a very large d 33 value [20][21][22]. However, as the ε T ij value of KNN-related piezoceramics with the ideal T-O-R structure is generally large, their k ij and d ij × g ij values are relatively low [20][21][22]. Therefore, the formation of the PPB structure is not an effective approach to developing KNN-related piezoelectric ceramics for PEH.…”

Section: Introductionmentioning

confidence: 99%

“…The piezoelectric characteristics of KNN-related piezoceramics were also improved using the reactive template grain growth (RTGG) technique. The KNN-related piezoceramics aligned toward the [001] orientation using NaNbO 3 (NNO) templates exhibited a very large d 33 value; however, the enhancement of the ε T 33 value was not large because of the small polarization along the [001] orientation in the perovskite materials [22][23][24][25]. Therefore, texturing along the [001] direction may be an effective technique for obtaining KNN-based piezoceramics with large k ij and d ij × g ij values for application in high-power PEH.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the T C of the KN(N 1-z S z )-BAZ-SZ piezoceramic (z = 0:06) can be increased with a decrease in the z (or Sb 5+ content), resulting in a decrease in the ε T 33 /ε 0 value. Moreover, the [001]-texturing can enhance the d 33 and k p values of the KNN-related piezoelectric ceramics [22][23][24][25]27]. Consequently, the [001]-textured KN(N 1-z S z )-BAZ-SZ piezoelectric ceramics with a low Sb 5+ content (z < 0:06) are good candidates for PEH.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ultrahigh Performance Piezoelectric Energy Harvester Using Lead-Free Piezoceramics with Large Electromechanical Coupling Factor

Chae

et al. 2023

International Journal of Energy Research

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The output power of piezoelectric energy harvester (PEH) at the resonance frequency is dependent on the electromechanical coupling factor ( k p ) of the piezoceramic, which is proportional to d 33 / ε T 33 1 / 2 , where d 33 and ε T 33 are the piezoelectric change and dielectric constants, respectively. Therefore, the piezoceramic for the PEH should have a large d 33 and a small ε T 33 . [001]-texturing can be used for developing piezoceramics for PEH because it generally increases d 33 without increasing ε T 33 . The 0.96(K0.5Na0.5)(N1-zSz)O3-0.03(Bi0.5Ag0.5)ZrO3-0.01SrZrO3 [KN(N1-zSz)-BAZ-SZ] piezoceramics were textured along the [001] orientation, and the piezoceramic ( z = 0.01 ) showed a large k p of 0.77, which is the largest k p for KNN-related piezoceramics reported in the literature. The cantilever-type PEH manufactured using the KN(N0.99S0.01)-BAZ-SZ piezoceramic exhibited a large output power density of 7.86 mW/cm3 at resonance frequency because of its large k p . To date, this is the largest power density for PEHs manufactured utilizing lead-free piezoceramics. Hence, the [001]-textured KN(N0.99S0.01)-BAZ-SZ piezoceramic is an excellent candidate for PEH, and [001]-texturing is a very efficient method for developing piezoceramics for PEH.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ultrahigh Performance Piezoelectric Energy Harvester Using Lead-Free Piezoceramics with Large Electromechanical Coupling Factor

Chae

et al. 2023

International Journal of Energy Research

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Textured Piezoceramics: Processing, Properties and Applications

Chang,

Sun,

Liu

2024

Piezoelectric Materials

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Elastic Polarization Configuration Coupled with Activity Rattling Space Boosts Energy Harvesting Performance of Lead‐Free Piezoceramic

Xi,

Hou,

Zheng

et al. 2024

Adv Funct Materials

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Piezoelectric energy harvesting technology is drawing substantial attention as an eco‐friendly method to promote energy transformation, which is at the forefront of current scientific research. However, the difficulties involved in obtaining a stable output voltage (Vout) and a controllable output current density (Iout) represent bottlenecks in the development of piezoelectric energy harvesters (PEHs) for practical applications. Here, a novel strategy that couples elastic polarization configuration with activity rattling space in lead‐free potassium sodium niobate‐based piezoceramics is proposed to break through this barrier. The cantilever beam‐type PEHs assembled using the rationally designed piezoceramic system show a stable Vout (≈22 V) and a controllable Iout over the range from 6.09 to 20.16 µA cm−2, which is sufficient to drive multiple types of wireless sensors that have the same rated voltage but different rated current requirements. These fantastic power generation performances are associated with a stable piezoelectric voltage coefficient (g33), an increasing piezoelectric charge coefficient (d33), and a weakened electrostrictive coefficient (Q33) that stem from polarization configuration optimization in combination with introduction of the activity rattling space design. This work provides a good approach to modulation of the overall performance of piezoelectric materials to meet the demands of advanced PEH applications.

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Improvement of piezoelectricity of (Na, K)Nb-based lead-free piezoceramics using [001]-texturing for piezoelectric energy harvesters and actuators

Cited by 29 publications

References 59 publications

Ultrahigh Performance Piezoelectric Energy Harvester Using Lead-Free Piezoceramics with Large Electromechanical Coupling Factor

Ultrahigh Performance Piezoelectric Energy Harvester Using Lead-Free Piezoceramics with Large Electromechanical Coupling Factor

Textured Piezoceramics: Processing, Properties and Applications

Elastic Polarization Configuration Coupled with Activity Rattling Space Boosts Energy Harvesting Performance of Lead‐Free Piezoceramic

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