Lead-free piezoelectric KNN-based pin transducers for structural monitoring applications

Kwok Ho Lam; D. M. Lin; Yiqing Ni; H. L.W. Chan

doi:10.1177/1475921708102146

Lead-free piezoelectric KNN-based pin transducers for structural monitoring applications

Kwok Ho Lam, D. M. Lin, Yiqing Ni, H. L.W. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

11 Citations (Scopus)

Abstract

A 2.4mm diameter piezoelectric ceramic disc was used to construct a spring-loaded pin-type transducer for intelligent monitoring of systems. Two types of lead-free KNN-based ceramics (0.95K0.5Na0.5(Nb0.94Sb0.06)O3- 0.05LiTaO3+ 1.25 mol% BaO and K0.5Na0.5NbO3-0.75 mol% K5.4Cu1.3Ta10O29) were selected as a sensing element of the pin. The piezoelectric spring-loaded pins were mounted on the corners of the aluminum plate for the performance evaluation using a laser ultrasonic technique. The signals detected by transducers with different sensing elements including lead-based ceramics have been compared. The capability of impact detection of the lead-free transducers was shown to be comparable to that of the lead-based one. It is envisaged that lead-free piezoelectrics will become the important transducer materials in the next generation nondestructive evaluation technology.

Original language	English
Pages (from-to)	283-289
Number of pages	7
Journal	Structural Health Monitoring
Volume	8
Issue number	4
DOIs	https://doi.org/10.1177/1475921708102146
Publication status	Published - 1 Jul 2009

Keywords

Lead-free ceramics
Pin transducer
Structural monitoring

ASJC Scopus subject areas

Biophysics
Mechanical Engineering

More information

10.1177/1475921708102146

Cite this

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title = "Lead-free piezoelectric KNN-based pin transducers for structural monitoring applications",

abstract = "A 2.4mm diameter piezoelectric ceramic disc was used to construct a spring-loaded pin-type transducer for intelligent monitoring of systems. Two types of lead-free KNN-based ceramics (0.95K0.5Na0.5(Nb0.94Sb0.06)O3- 0.05LiTaO3+ 1.25 mol% BaO and K0.5Na0.5NbO3-0.75 mol% K5.4Cu1.3Ta10O29) were selected as a sensing element of the pin. The piezoelectric spring-loaded pins were mounted on the corners of the aluminum plate for the performance evaluation using a laser ultrasonic technique. The signals detected by transducers with different sensing elements including lead-based ceramics have been compared. The capability of impact detection of the lead-free transducers was shown to be comparable to that of the lead-based one. It is envisaged that lead-free piezoelectrics will become the important transducer materials in the next generation nondestructive evaluation technology.",

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AU - Lin, D. M.

AU - Ni, Yiqing

AU - Chan, H. L.W.

PY - 2009/7/1

Y1 - 2009/7/1

N2 - A 2.4mm diameter piezoelectric ceramic disc was used to construct a spring-loaded pin-type transducer for intelligent monitoring of systems. Two types of lead-free KNN-based ceramics (0.95K0.5Na0.5(Nb0.94Sb0.06)O3- 0.05LiTaO3+ 1.25 mol% BaO and K0.5Na0.5NbO3-0.75 mol% K5.4Cu1.3Ta10O29) were selected as a sensing element of the pin. The piezoelectric spring-loaded pins were mounted on the corners of the aluminum plate for the performance evaluation using a laser ultrasonic technique. The signals detected by transducers with different sensing elements including lead-based ceramics have been compared. The capability of impact detection of the lead-free transducers was shown to be comparable to that of the lead-based one. It is envisaged that lead-free piezoelectrics will become the important transducer materials in the next generation nondestructive evaluation technology.

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KW - Pin transducer

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Lead-free piezoelectric KNN-based pin transducers for structural monitoring applications

Abstract

Keywords

ASJC Scopus subject areas

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