Comparison of the performance of pmn-pt single-crystal and ceramic composite arrays for NDE applications

D.C. Robertson, G. Hayward, A. Gachagan, V. Murray

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Ultrasonic array technology is used in many imaging applications across a wide range of industrial sectors. Perovskite single-crystal materials such as pzn-pt and pmn-pt can be used to manufacture arrays with much increased sensitivity and bandwidth, compared to conventional piezoelectric ceramic designs. One way to take advantage of these new active materials is to incorporate the single-crystal material as the active piezoelectric elements, embedded within a passive polymeric material, in a piezoelectric composite structure. This paper describes a theoretical and experimental investigation into the performance of wideband 1-3 composite arrays utilising pzt5h ceramic and pmn-pt single-crystal as the active materials. Six-element prototype arrays were manufactured with a centre frequency of approximately 2.25 MHz. The comparison of the single-crystal and pzt5h devices is based on laser vibrometer surface displacement cross-talk measurements and electrical impedance measurements as well as transmit and receive measurements in water. The measured electrical impedance and mechanical cross-talk from the manufactured arrays correlates well with that predicted using the FE software package PZFlex. Moreover, the design techniques obtained from PZFlex, are shown to produce arrays with low cross-talk. Overall, the single-crystal device shows considerably improved performance over the pzt5h device as demonstrated by its higher bandwidth and superior pulse-echo performance.

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Single crystals
Composite materials
Acoustic impedance
Bandwidth
Piezoelectric ceramics
Composite structures
Software packages
Perovskite
Ultrasonics
Imaging techniques
Water
Lasers
Polymers

Keywords

  • surface melting
  • piezoelectric sensor
  • embedded transducer
  • bandwidth
  • composite material
  • electrical measurement
  • displacement measurement
  • surface metrology
  • optical measurement

Cite this

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title = "Comparison of the performance of pmn-pt single-crystal and ceramic composite arrays for NDE applications",
abstract = "Ultrasonic array technology is used in many imaging applications across a wide range of industrial sectors. Perovskite single-crystal materials such as pzn-pt and pmn-pt can be used to manufacture arrays with much increased sensitivity and bandwidth, compared to conventional piezoelectric ceramic designs. One way to take advantage of these new active materials is to incorporate the single-crystal material as the active piezoelectric elements, embedded within a passive polymeric material, in a piezoelectric composite structure. This paper describes a theoretical and experimental investigation into the performance of wideband 1-3 composite arrays utilising pzt5h ceramic and pmn-pt single-crystal as the active materials. Six-element prototype arrays were manufactured with a centre frequency of approximately 2.25 MHz. The comparison of the single-crystal and pzt5h devices is based on laser vibrometer surface displacement cross-talk measurements and electrical impedance measurements as well as transmit and receive measurements in water. The measured electrical impedance and mechanical cross-talk from the manufactured arrays correlates well with that predicted using the FE software package PZFlex. Moreover, the design techniques obtained from PZFlex, are shown to produce arrays with low cross-talk. Overall, the single-crystal device shows considerably improved performance over the pzt5h device as demonstrated by its higher bandwidth and superior pulse-echo performance.",
keywords = "surface melting, piezoelectric sensor, embedded transducer, bandwidth, composite material, electrical measurement, displacement measurement, surface metrology, optical measurement",
author = "D.C. Robertson and G. Hayward and A. Gachagan and V. Murray",
year = "2006",
month = "2",
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language = "English",
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Comparison of the performance of pmn-pt single-crystal and ceramic composite arrays for NDE applications. / Robertson, D.C.; Hayward, G.; Gachagan, A.; Murray, V.

In: Insight: The Journal of the British Institute of Non-Destructive Testing, Vol. 48, No. 2, 02.2006, p. 97-99.

Research output: Contribution to journalArticle

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