Softening effect of trace Fe-substituted potassium-sodium niobate-based lead-free piezoceramics
Source abstract
Abstract
For KNN-based lead-free piezoceramics, Fe usually enters the B site as the acceptor to harden the ceramics. Herein, Fe preferentially entered the A-site, and different softening effects were observed in trace Fe-substitution KNN-base ceramics. The effects of Fe doping on the phase structure, grain size and electrical properties of 0.96K 0.48Na 0.52Nb 0.96Sb 0.04O 3-0.04Bi 0.5-xFe xAg 0.03Na 0.47ZrO 3 (KNNS-BF xANZ, x = 0.0~0.08) ceramics were investigated. The most excellent overall properties ( k p=0.56, d 33=464 pC/N and T C=240 °C) were obtained with x = 0.06. The enhanced electrical properties are attributed to the substantial improvement in density and polarization efficiency caused by trace Fe ions. Of particular interest is that the trace Fe ions doping could regulate the T R-O/ T O-T without the change of T C . This work provided a refreshing thinking for the study of soft/hard doping of KNN based piezoelectric ceramics, and was of great significance to further improve the comprehensive properties of KNN based piezoelectric materials without sacrificing Curie temperature.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Acoustic Wave Resonator Technologies · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Polarization switching and rotation in KNN-based lead-free piezoelectric ceramics near the polymorphic phase boundary10.1016/j.jeurceramsoc.2018.11.001 ↗
2. Phase coexistence induced strong piezoelectricity in K0.5Na0.5NbO3-based lead-free ceramics10.1039/C9DT01735F ↗
3. Simultaneously improving piezoelectric properties and temperature stability of Na0.5K0.5NbO3 (KNN)-based ceramics sintered in reducing atmosphere
4. Ferroelectric-to-relaxor crossover in KNN-based lead-free piezoceramics10.1016/j.ceramint.2020.10.066 ↗
5. Potassium-sodium niobate lead-free piezoelectric materials: past, present, and future of phase boundaries10.1021/cr5006809 ↗
6. Phase structure and enhanced piezoelectric properties in (1-x)(K0.48Na0.52)(Nb0.95Sb0.05)O3-x(Bi0.5Na0.42Li0.08)0.9Sr0.1ZrO3 lead-free piezoelectric ceramics10.1016/j.ceramint.2016.10.189 ↗
7. Lead‐free relaxor ferroelectrics10.1111/j.1551-2916.2011.04952.x ↗
8. Structure and dielectric dispersion in cubic-like 0.5K0.5Na0.5NbO3-0.5Na1/2Bi1/2TiO3 ceramic10.1209/0295-5075/114/47011 ↗
9. High strain in (K0.40Na0.60)(Nb0.955Sb0.045)O3-Bi0.50Na0.50ZrO3 lead-free ceramics with large piezoelectricity10.1039/C4TC01533A ↗
10. Investigation of high piezoelectric properties of KNNSb-SrxBNZ ceramics10.1016/j.jallcom.2019.152252 ↗
11. Dielectric and piezoelectric properties of Fe2O3-doped (Na0.5K0.5)0.96Li0.04Nb0.86Ta0.1Sb0.04O3 lead-free ceramics10.1016/j.jpcs.2008.01.003 ↗
12. Transformation of hardening to softening behaviors induced by Sb substitution in CuO-doped KNN-based piezoceramics10.1016/j.ceramint.2019.03.254 ↗
13. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides10.1107/S0567739476001551 ↗
14. Modulation of defects and electrical behaviors of Cu-doped KNN ceramics by fluorine-oxygen substitution10.1039/C9DT04133H ↗
15. Defect structure, ferroelectricity and piezoelectricity in Fe/Mn/Cu-doped K0.5Na0.5NbO3 lead-free piezoelectric ceramics10.1016/j.jeurceramsoc.2018.07.019 ↗
16. Structure and piezoelectric properties of Fe‐doped potassium sodium niobate tantalate lead‐free ceramics10.1111/j.1551-2916.2011.04390.x ↗
17. Effect of oriented defect-dipoles on the ferroelectric and piezoelectric ceramics10.1016/j.ceramint.2018.02.233 ↗
18. Effects of Ag content on the phase structure and piezoelectric properties of (K0.44-xNa0.52Li0.04Agx) (Nb0.91Ta0.05Sb0.04)O3 lead-free ceramics
19. Improving fatigue properties, temperature stability and piezoelectric properties of KNN-based ceramics via sintering in reducing atmosphere10.1016/j.jeurceramsoc.2021.03.007 ↗
20. Processing and piezoelectric properties of (Na0.5K0.5)0.96Li0.04(Ta0.1Nb0.9)1-xCuxO3-3x/2 lead‐free ceramics10.1111/j.1551-2916.2007.02206.x ↗
21. Effect of oriented defect-dipoles on the ferroelectric and piezoelectric properties of CuO-doped (K0.48Na0.52)0.96Li0.04Nb0.805Ta0.075Sb0.12O3 ceramics10.1016/j.ceramint.2018.02.233 ↗
22. Remarkably strong piezoelectricity, rhombohedral-orthorhombic-tetragonal phase coexistence and domain structure of (K,Na)(Nb,Sb)O3-(Bi,Na)ZrO3-BaZrO3 ceramics10.1016/j.jallcom.2019.153411 ↗
23. Giant piezoelectricity in potassium–sodium niobate lead-free ceramics10.1021/ja500076h ↗
24. Effect of alkalis on iron-based Fischer-Tropsch synthesis catalysts: alkali-FeOx interaction, reduction, and catalytic performance10.1016/j.apcata.2016.10.006 ↗
25. Microstructures, piezoelectric properties and energy harvesting performance of undoped (K0.5Na0.5)NbO3 lead-free ceramics fabricated via two-step sintering10.1016/j.jeurceramsoc.2020.02.035 ↗
26. Effects of Bi nonstoichiometry in (Bi0.5+xNa0.5)TiO3 ceramics10.1063/1.3525370 ↗
27. Comprehensive investigation of structural and electrical properties of (Bi,Na)CoZrO3-doped KNN ceramics10.1016/j.jallcom.2018.05.102 ↗
28. Enhanced temperature stability in the O-T phase boundary of (K, Na)NbO3‐based ceramics10.1111/jace.16830 ↗
29. Improving photostriction of KNN-based ceramics by MnO2 additive and polarization10.1016/j.ceramint.2021.03.190 ↗
30. Effect of ZnO doping on (K,Na)NbO3-based lead-free piezoceramics: Enhanced ferroelectric and piezoelectric performance10.1016/j.jallcom.2020.155936 ↗
31. Piezoelectric and ferroelectric properties of KxNa1−xNbO3 lead-free ceramics with MnO2 and CuO doping10.1016/j.jallcom.2007.06.128 ↗
32. Useful formulas for piezoelectric ceramic resonators and their application to measurement of parameters10.1121/1.1910452 ↗
33. Further enhancing piezoelectric properties by adding MnO2 in AgSbO3‐modified (Li,K,Na)(Nb,Ta)O3 lead‐free piezoceramics10.1111/jace.14412 ↗
34. Microstructure, piezoelectric, and ferroelectric properties of Bi2O3‐added (K0.5Na0.5)NbO3 lead‐free ceramics10.1111/j.1551-2916.2007.01846.x ↗
35. Rietveld analysis and electrical properties of BiInO3 doped KNN-based ceramics10.1021/acs.inorgchem.8b02600 ↗
36. Intrinsic and extrinsic size effects in fine‐grained morphotropic‐phase‐boundary lead zirconate titanate ceramics10.1111/j.1151-2916.1998.tb02389.x ↗
37. New potassium-sodium niobate lead-free piezoceramic: giant-d33 vs. sintering temperature10.1063/1.4868585 ↗
38. Review of chemical modification on potassium sodium niobate lead-free piezoelectrics10.1039/C9TC00476A ↗