Synchrotron x-ray diffraction study of the surface layer in poled ceramic BaTiO{sub 3}

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Both unpoled and poled BaTiO{sub 3} were studied by laboratory and synchrotron x-ray sources. The shorter-wavelength synchrotron radiation was used to probe deeper below the surface. Diffraction patterns revealed a distinctive surface layer of the same tetragonal structure as the main BaTiO{sub 3} fraction. A sin{sup 2}{Psi} analysis of peak shift confirmed that no measurable change of elastic strain occurs upon poling, indicating that poling may induce excessive strain that was relieved by microcracking or that a majority of domains reverse orientation. However, domain switching and possible microcracking may induced inhomogeneous strain (microstrain) and alter domain-size distribution. Line-broadening analysis showed ... continued below

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6 p.

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Ledbetter, H.; Balzar, D.; Stephens, P.W.; Li, J. & Dunn, M.L. January 1, 1997.

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  • Ledbetter, H. National Inst. of Standards and Technology, Boulder, CO (United States)
  • Balzar, D. National Inst. of Standards and Technology, Bounder, CO (United States)
  • Stephens, P.W. State Univ. of New York, Stony Brook, NY (United States)
  • Li, J.
  • Dunn, M.L. Colorado Univ., Boulder, CO (United States)

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Both unpoled and poled BaTiO{sub 3} were studied by laboratory and synchrotron x-ray sources. The shorter-wavelength synchrotron radiation was used to probe deeper below the surface. Diffraction patterns revealed a distinctive surface layer of the same tetragonal structure as the main BaTiO{sub 3} fraction. A sin{sup 2}{Psi} analysis of peak shift confirmed that no measurable change of elastic strain occurs upon poling, indicating that poling may induce excessive strain that was relieved by microcracking or that a majority of domains reverse orientation. However, domain switching and possible microcracking may induced inhomogeneous strain (microstrain) and alter domain-size distribution. Line-broadening analysis showed large anisotropy of both coherently diffracting domain size and microstrain. The poled specimen shows a larger microstrain and smaller average domain size, which indicates possible effects of microcracking and additional defects created during poling.

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6 p.

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OSTI as DE97003166

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  • 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996

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  • Other: DE97003166
  • Report No.: BNL--63969
  • Report No.: CONF-961202--68
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 449437
  • Archival Resource Key: ark:/67531/metadc677595

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  • January 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • Nov. 9, 2015, 4:18 p.m.

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Ledbetter, H.; Balzar, D.; Stephens, P.W.; Li, J. & Dunn, M.L. Synchrotron x-ray diffraction study of the surface layer in poled ceramic BaTiO{sub 3}, article, January 1, 1997; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc677595/: accessed May 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.