Influence of moisture on pyroelectric properties of bone

Vadim E. Khutorsky, Sidney B. Lang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The voltage and time dependences of the pyroelectric properties of wet and dry bone (turkey femur) were investigated using Chynoweth's (1956) dynamic pyroelectric method. The current generated by the sample had both real and imaginary components. The magnitude of the response was almost the same regardless of which sample electrode was irradiated with the laser beam, but the signs were opposite. The current increased by up to several orders of magnitude when a bias DC field of 1000 V/cm was imposed. When the bias field was switched off, a current in the opposite direction with a decay time of tens of hours was measured. There was also a slow decay of a direct current with a polarity opposite to that of the bias field. In conductivity measurements, the DC varied nonlinearly as the 1.5 power of the voltage. When the samples were stored in vacuum at 100 degrees C for one hour, both the pyroelectric coefficient and the conductivity decreased by several orders of magnitude. It is concluded that the pyroelectric properties of bone depend strongly on the moisture content and that the polarization in wet bone is nonuniform. The polarization appears to be due to an internal field at the interfaces of the solid matrix and the fluid within the pores.

Original languageEnglish
Title of host publicationISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics
EditorsMichael Liu, Ahmad Safari, Angus Kingon, Gene Haertling
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages592-595
Number of pages4
ISBN (Electronic)0780304659, 9780780304659
DOIs
StatePublished - 1 Jan 1992
Event8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992 - Greenville, United States
Duration: 30 Aug 19922 Sep 1992

Publication series

NameISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics

Conference

Conference8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992
Country/TerritoryUnited States
CityGreenville
Period30/08/922/09/92

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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