Perovskite lithium and bismuth modified potassium-sodium niobium lead-free ceramics for high temperature applications

Journal Article · Mon Oct 29 04:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2800793· OSTI ID:21013767

Hongliang, Du; Wancheng, Zhou; Fa, Luo; Dongmei, Zhu; Shaobo, Qu; Zhibin, Pei ^[1]

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1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072 (China)

[(K{sub (1-x)/2}Na{sub (1-x)/2}Li{sub x}){sub 1-3y}Bi{sub y}]NbO{sub 3} (abbreviated as KNLBN) ceramics were prepared by conventional solid-state sintering. The addition of Li{sup +} and Bi{sup 3+} makes the orthorhombic-tetragonal phase transition temperature (T{sub O-T}) decrease from 200 deg. C for pure (K{sub 0.5}Na{sub 0.5})NbO{sub 3} ceramics to -10 deg. C for KNLBN ceramics (x=0.06, y=0.005), while maintaining high Curie temperature (T{sub C}=455 deg. C) and piezoelectric properties (d{sub 33}=185 pC/N, k{sub p}=0.43, k{sub t}=0.45, {epsilon}{sub 33}{sup T}/{epsilon}{sub 0}=1020, and tan {delta}=0.023) at room temperature. In addition, good temperature stability of electrical properties is obtained in KNLBN ceramics (x=0.06, y=0.005) owing to the decrease of T{sub O-T}. These results indicate that KNLBN (x=0.06, y=0.005) ceramic is a promising lead-free piezoelectric candidate material for high temperature applications.

• OSTI ID: 21013767
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 18 Vol. 91; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
BISMUTH IONS
CERAMICS
CURIE POINT
ELECTRICAL PROPERTIES
LITHIUM COMPOUNDS
LITHIUM IONS
NIOBATES
ORTHORHOMBIC LATTICES
PEROVSKITE
PHASE TRANSFORMATIONS
PIEZOELECTRICITY
POTASSIUM COMPOUNDS
SINTERING
SODIUM COMPOUNDS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TETRAGONAL LATTICES