Phase transition-induced high electromechanical activity in [(K0.5Na0.5)1-xLix](Nb0.8Ta0.2)O3 lead-free ceramic system

Zuyong Feng; Siu Wing Or

doi:10.1016/j.jallcom.2009.01.111

Phase transition-induced high electromechanical activity in [(K_0.5Na_0.5)_1-xLi_x](Nb_0.8Ta_0.2)O₃ lead-free ceramic system

Zuyong Feng
, Siu Wing Or

The Hong Kong Polytechnic University

Research output: Journal article publication › Letter › peer-review

13 Citations (Scopus)

Abstract

A high electromechanical activity is observed in the [(K_0.5Na_0.5)_1-xLi_x](Nb_0.8Ta_0.2)O₃ (x = 0, 0.02, and 0.03) lead-free ceramic system at and around the orthorhombic (O)-tetragonal (T) phase transition temperature (T_O-T). This activity is found to originate from an O-T phase transition region at ambient temperature rather than a classical morphotropic phase boundary (MPB) region intrinsic in the Pb(Zr_1-xTi_x)O₃ (PZT) lead-based ceramic system. Li modification enables a large decrease in T_O-T instead of constituting a classical MPB. In contrast to the nearly temperature-independent classical MPB behavior in the PZT system, the strong temperature-dependent phase transition behavior in the system may impose a challenge to temperature demanding applications.

Original language	English
Pages (from-to)	L5
Journal	Journal of Alloys and Compounds
Volume	480
Issue number	2
DOIs	https://doi.org/10.1016/j.jallcom.2009.01.111
Publication status	Published - 8 Jul 2009

Keywords

Electromechanical activity
Lead-free ceramics
Morphotropic phase boundary (MPB)
Phase transition

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

More information

10.1016/j.jallcom.2009.01.111

Cite this

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title = "Phase transition-induced high electromechanical activity in [(K0.5Na0.5)1-xLix](Nb0.8Ta0.2)O3 lead-free ceramic system",

abstract = "A high electromechanical activity is observed in the [(K0.5Na0.5)1-xLix](Nb0.8Ta0.2)O3 (x = 0, 0.02, and 0.03) lead-free ceramic system at and around the orthorhombic (O)-tetragonal (T) phase transition temperature (TO-T). This activity is found to originate from an O-T phase transition region at ambient temperature rather than a classical morphotropic phase boundary (MPB) region intrinsic in the Pb(Zr1-xTix)O3 (PZT) lead-based ceramic system. Li modification enables a large decrease in TO-T instead of constituting a classical MPB. In contrast to the nearly temperature-independent classical MPB behavior in the PZT system, the strong temperature-dependent phase transition behavior in the system may impose a challenge to temperature demanding applications.",

keywords = "Electromechanical activity, Lead-free ceramics, Morphotropic phase boundary (MPB), Phase transition",

author = "Zuyong Feng and Or, \{Siu Wing\}",

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AU - Feng, Zuyong

AU - Or, Siu Wing

PY - 2009/7/8

Y1 - 2009/7/8

N2 - A high electromechanical activity is observed in the [(K0.5Na0.5)1-xLix](Nb0.8Ta0.2)O3 (x = 0, 0.02, and 0.03) lead-free ceramic system at and around the orthorhombic (O)-tetragonal (T) phase transition temperature (TO-T). This activity is found to originate from an O-T phase transition region at ambient temperature rather than a classical morphotropic phase boundary (MPB) region intrinsic in the Pb(Zr1-xTix)O3 (PZT) lead-based ceramic system. Li modification enables a large decrease in TO-T instead of constituting a classical MPB. In contrast to the nearly temperature-independent classical MPB behavior in the PZT system, the strong temperature-dependent phase transition behavior in the system may impose a challenge to temperature demanding applications.

AB - A high electromechanical activity is observed in the [(K0.5Na0.5)1-xLix](Nb0.8Ta0.2)O3 (x = 0, 0.02, and 0.03) lead-free ceramic system at and around the orthorhombic (O)-tetragonal (T) phase transition temperature (TO-T). This activity is found to originate from an O-T phase transition region at ambient temperature rather than a classical morphotropic phase boundary (MPB) region intrinsic in the Pb(Zr1-xTix)O3 (PZT) lead-based ceramic system. Li modification enables a large decrease in TO-T instead of constituting a classical MPB. In contrast to the nearly temperature-independent classical MPB behavior in the PZT system, the strong temperature-dependent phase transition behavior in the system may impose a challenge to temperature demanding applications.

KW - Electromechanical activity

KW - Lead-free ceramics

KW - Morphotropic phase boundary (MPB)

KW - Phase transition

UR - https://www.scopus.com/pages/publications/67349101271

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