Reinvestigation of ionic motion in amorphous materials: A power law approach to the a.c. conductivity. Progress report Metadata

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Title

  • Main Title Reinvestigation of ionic motion in amorphous materials: A power law approach to the a.c. conductivity. Progress report

Contributor

  • Sponsor: United States. Department of Energy. Office of Energy Research.
    Contributor Type: Organization
    Contributor Info: USDOE Office of Energy Research, Washington, DC (United States)

Publisher

  • Name: New Mexico State Univ., Albuquerque, NM (United States)
    Place of Publication: United States

Date

  • Creation: 1999-01-01

Language

  • English

Description

  • Content Description: The motion of mobile ions in glassy materials produces a dielectric response that is characteristically non-Debye. This deviation from ideal Debye behavior is evidenced both in the a.c. conductivity, {sigma}(f), which increases anomalously as a power law of the form {sigma}(f) = {sigma}{sub 0}(1+(f/f{sub 0}){sup n}), and in the electric modulus which is better described by a stretched-exponential relaxation of the form {phi}(t) = exp({minus}(t/{tau}){sup {beta}}). The authors have examined the dielectric response of sodium germanate glasses over a wide composition range. In accordance with other studies, they observed substantial narrowing of the electric modulus with decreasing alkali content. However, no changes were evident in the power law response of the a.c. conductivity, and {sigma}(f) could be scaled to a common response curve at all compositions. This result clearly rules out inter-ionic interactions as a source for the non-Debye relaxation. The authors extended the study of sodium germanates to examine also the power law dynamics in the mixed alkali (MA) glass.
  • Physical Description: 2 p.

Subject

  • Keyword: Chemical Composition
  • Keyword: Germanium Oxides
  • STI Subject Categories: 36 Materials Science
  • Keyword: Progress Report
  • Keyword: Sodium Oxides
  • Keyword: Glass
  • Keyword: Amorphous State
  • Keyword: Relaxation
  • Keyword: Ionic Conductivity
  • Keyword: Lithium Oxides

Source

  • Other Information: PBD: Jan 1999

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Other: DE99001725
  • Report No.: DOE/ER/45696--T1
  • Grant Number: FG03-98ER45696
  • DOI: 10.2172/314150
  • Office of Scientific & Technical Information Report Number: 314150
  • Archival Resource Key: ark:/67531/metadc683866

Note

  • Display Note: OSTI as DE99001725
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