Potassium–sodium niobate lead-free piezoelectric ceramics: recent advances and perspectives

Wu, Jiagang; Xiao, Dingquan; Zhu, Jianguo

doi:10.1007/s10854-015-3084-2

Cited by 53 publications

(37 citation statements)

References 105 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…KNN‐based ceramics has obtained rapid development owing to the phase engineering strategy since 2004, which can effectively enhance their electric properties . For example, some publications have reported that constructing new phase boundary (eg, R‐O‐T, R‐T) by tuning chemical modifications [eg, Sb 5+ , Ta 5+ , (Bi0.5 M 0.5 N 0.5 O 3, M = Na, K, Li, Ag; N = Zr, Ti, Sn, Hf] can greatly enhances the electric properties, especially the piezoelectric coefficients (eg, d 33 ≥ 400 pC/N) . However, practical applications demands not only the high electric properties but also its stability in response to ambient changes, especially the temperature changes.…”

Section: Introductonmentioning

confidence: 99%

Enhanced temperature stability in the O–T phase boundary of (K, Na)NbO₃‐based ceramics

Gou

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

In order to obtain excellent electrical properties and its temperature stability of KNN‐based ceramics to meet the practical applications, a new lead‐free material system of (1−x)K0.5Na0.5Nb0.96Sb0.04O3‐xBi0.5Na0.5Zr0.8Sn0.2O3 (KNNS‐xBNZS, 0 ≤ x ≤ 0.060) was designed, and the enhanced electrical properties (eg, d33 ~ 465 pC/N, εr ~ 3318, Suni ~ 0.133%) is obtained in the ceramics with x = 0.04. The physical origin of enhanced electric properties should be ascribed to the phase instability of R‐T, resulting in a low‐energy barrier, which can greatly facilitate the polarization switching. Moreover, the temperature stable of piezoelectric constant (d33 or d33*) is measured by three distinctive methods in different phase boundaries (O, O‐T, R‐T) at the temperature range 20°C‐180°C, revealing that the O‐T phase boundary has a relatively good temperature stability. A mode is used to show how to effectively modified the piezoelectric constant (d33 or d33*) and its temperature stability, we believe that such a strategy may further improve the temperature stability of d33 or d33* value in KNN‐based ceramics.

show abstract

Section: Introductonmentioning

confidence: 99%

Enhanced temperature stability in the O–T phase boundary of (K, Na)NbO₃‐based ceramics

Gou

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

show abstract

“…3 KNN-based ceramics have exhibited the potential to replace lead-based materials since Saito et al achieved a large d 33 of 416 pC/N in highly textured LF4T ceramics. 7 Since the piezoelectric properties are known to be closely related to the phase structure of a piezoceramic, 8 a systematic study of the R-T phase boundary from low to high temperatures is highly anticipated. 5,6 Although the existence of an R-T phase boundary substantially improves the piezoelectric properties, knowledge about the structural evolution of the R-T phase boundary itself from a low temperature to a high temperature is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Structural evolution of the R‐T phase boundary in KNN‐based ceramics

Xiao

et al. 2017

J Am Ceram Soc

Self Cite

View full text Add to dashboard Cite

Although a rhombohedral‐tetragonal (R‐T) phase boundary is known to substantially enhance the piezoelectric properties of potassium‐sodium niobate ceramics, the structural evolution of the R‐T phase boundary itself is still unclear. In this work, the structural evolution of R‐T phase boundary from −150°C to 200°C is investigated in (0.99−x)K0.5Na0.5Nb1−ySbyO3–0.01CaSnO3–xBi0.5K0.5HfO3 (where x = 0‐0.05 with y = 0.035, and y = 0‐0.07 with x = 0.03) ceramics. Through temperature‐dependent powder X‐ray diffraction (XRD) patterns and Raman spectra, the structural evolution was determined to be Rhombohedral (R, <−125°C)→Rhombohedral + Orthorhombic (R + O, −125°C to 0°C)→Rhombohedral + Tetragonal (R + T, 0 °C to 150°C)→dominating Tetragonal (T, 200°C to Curie temperature (TC)) → Cubic (C, >TC). In addition, the enhanced electrical properties (e.g., a direct piezoelectric coefficient (d33) of ~450 ± 5 pC/N, a conversion piezoelectric coefficient (d33∗) of ~580 ± 5 pm/V, an electromechanical coupling factor (kp) of ~0.50 ± 0.02, and TC~250°C), fatigue‐free behavior, and good thermal stability were exhibited by the ceramics possessing the R‐T phase boundary. This work improves understanding of the physical mechanism behind the R‐T phase boundary in KNN‐based ceramics and is an important step toward their adoption in practical applications.

show abstract

“…Among the lead-free piezoceramics, the perovskite structural ceramics K x Na 1Àx NbO 3 (KNN) and the derivatives became the focus owing to the large piezoelectric constant and high Curie temperature. [8][9][10] K x Na 1Àx NbO 3 system is composed of ferroelectric KNbO 3 and ferroelectric-antiferroelectric NaNbO 3 , 11 exhibiting a morphotropic phase boundary (MPB) around 50% K and 50% Na. 12 The MPB effect is combined to the polymorphic phase transition (PPT) 13 in view of the dependence of phase boundary on temperature.…”

Section: Introductionmentioning

confidence: 99%

Progress on the doping and phase boundary design of potassium–sodium niobate lead-free ceramics

Xing

Zheng

et al. 2018

J. Adv. Dielect.

Self Cite

View full text Add to dashboard Cite

Potassium-sodium niobate (K,Na)NbO 3 /(KNN) lead-free ceramics have drawn vast amount of attention as one of the effective alternatives to lead-based ones. In recent years, the author's group concentrated their work on KNN-based ceramics. This paper reviews the main obtained results in authors' laboratory on how to enhance the piezoelectric properties of KNN-based ceramics, including the ions or compounds substitution, the constructing and types of phase boundaries near room temperature, the investigation of other tools (sintering aids, synthesis technique, poling conditions) on properties. All the published papers up to now show the developing higher performance with maintaining high Curie temperature of KNN-based ceramics which has great potential for the future and is the key to success for the field.

show abstract

Potassium–sodium niobate lead-free piezoelectric ceramics: recent advances and perspectives

Cited by 53 publications

References 105 publications

Enhanced temperature stability in the O–T phase boundary of (K, Na)NbO₃‐based ceramics

Enhanced temperature stability in the O–T phase boundary of (K, Na)NbO₃‐based ceramics

Structural evolution of the R‐T phase boundary in KNN‐based ceramics

Progress on the doping and phase boundary design of potassium–sodium niobate lead-free ceramics

Contact Info

Product

Resources

About

Potassium–sodium niobate lead-free piezoelectric ceramics: recent advances and perspectives

Cited by 53 publications

References 105 publications

Enhanced temperature stability in the O–T phase boundary of (K, Na)NbO3‐based ceramics

Enhanced temperature stability in the O–T phase boundary of (K, Na)NbO3‐based ceramics

Structural evolution of the R‐T phase boundary in KNN‐based ceramics

Progress on the doping and phase boundary design of potassium–sodium niobate lead-free ceramics

Contact Info

Product

Resources

About

Enhanced temperature stability in the O–T phase boundary of (K, Na)NbO₃‐based ceramics

Enhanced temperature stability in the O–T phase boundary of (K, Na)NbO₃‐based ceramics