The impact of chemical heterogeneity in lead-free (K, Na) NbO3 piezoelectric perovskite: Ferroelectric phase coexistence

HC Thong, C Zhao, ZX Zhu, X Chen, JF Li, K Wang - Acta Materialia, 2019 - Elsevier
… phase coexistence was observed in the polycrystalline ceramic sample after sintering. The …
into secondary phases along grain boundaries, having segregated compositions [33,43]. The …

[HTML][HTML] Large electrical strain in lead-free K0. 5Na0. 5NbO3-based ceramics by heterovalent doping

X Wang, J Wang, W Geng, G Dong, B Dkhil, X Lou - Journal of Materiomics, 2023 - Elsevier
ceramics [2,53] with the polymorphic phase boundary. It can be attributed to the sluggish
behavior of compositional inhomogeneity … heterovalent doping K 0.5 Na 0.5 NbO 3 ceramics, …

Composition, microstructure and electrical properties of K0. 5Na0. 5NbO3 ceramics fabricated by cold sintering assisted sintering

J Ma, H Li, H Wang, C Lin, X Wu, T Lin, X Zheng… - … of the European Ceramic …, 2019 - Elsevier
… Lead-free K 0.5 Na 0.5 NbO 3 piezoelectric ceramics were … cold sintering due to the segregation
of composition and the … of sintering, and result in compositional uniformity and accurate …

Effect of synthesis and sintering temperatures on K0.5Na0.5NbO3 lead-free piezoelectric ceramics by microwave heating

A Lagunas-Chavarría, MG Navarro-Rojero… - Journal of Materials …, 2021 - Springer
… to the volatilization and segregation of the alkali elements [25] and the inhomogeneities in the
… The compositional analysis is summarized in the built-in table. The ions found in the matrix …

(K, Na) NbO3-based piezoelectric single crystals: Growth methods, properties, and applications

J Koruza, H Liu, M Höfling, MH Zhang… - Journal of Materials …, 2020 - cambridge.org
… -based polycrystalline ceramics was recently questioned by … (k) of the elements, also referred
to as the segregation … large crystals, but compositional inhomogeneities are often reported …

Lead-free (K0. 5Na0. 5) NbO3 co-substituted with Ta5+ and Er3+: Structural, optical, dielectric and electrical properties

N Gouitaa, T Lamcharfi, F Abdi, O Bajjou - Journal of Solid State Chemistry, 2024 - Elsevier
… of segregation regions. However, it is known that compositional segregation of KNN ceramics
is … Since the alkaline element is evaporated in pure KNN, the inhomogeneous morphology …

High-efficiency synthesis of high-performance K0. 5Na0. 5NbO3 ceramics

B Chen, P Liang, D Wu, X Zhao, X Qiao, Z Peng… - Powder technology, 2019 - Elsevier
… of KNN ceramics [50,22]. The grains of CKNN ceramics are inhomogeneous and loosely …
process and the performances of obtained K 0.5 Na 0.5 NbO 3 ceramics in this work, we …

Microstructures, piezoelectric properties and energy harvesting performance of undoped (K0. 5Na0. 5) NbO3 lead-free ceramics fabricated via two-step sintering

G Ye, J Wade-Zhu, J Zou, T Zhang, TW Button… - … the European Ceramic …, 2020 - Elsevier
… evaporation of Na will lead to K and Nb segregation, generating sites that are K-rich and
Nb-… From the KNN phase diagram, Na 2 O evaporation will cause a compositional shift to the K-…

Effect of Synthesis and Sintering Temperatures on K0. 5Na0. 5NbO3 Lead-Free Piezoelectric Ceramics By Microwave Heating

A Lagunas, MG Navarro-Rojero, MD Salvador… - 2021 - researchsquare.com
… to the volatilization and segregation of the alkali elements [26] and the inhomogeneities in the
… The compositional analysis is summarized in the built-in table. The ions found in the matrix …

MgNb2O6 Modified K0.5Na0.5NbO3 Eco‐Piezoceramics: Scalable Processing, Structural Distortion and Complex Impedance at Resonance

A Iacomini, S Garroni, N Senes, G Mulas… - …, 2021 - Wiley Online Library
… The milled monoclinic Nb 2 O 5 formed an inhomogeneous … in KNN ceramics and/or
volatilization and segregation of alkali … , k p and k 31 has been proved in the compositional range …