IONIC CONDUCTION IN BETA-ALUMINA.

Abstract

The investigation was undertaken to determine ionic transport characteristics in beta-alumina and between beta-alumina and adjacent phases. Polycrystalline beta-alumina disks were used for emf measurements of sodium activity in sodium amalgams of concentration 0.52 to 4.0 atom percent at 30C. No detectable electronic conduction of beta-alumina was observed. The current behavior, upon imposing a constant voltage source across the beta-alumina, was measured and found to decrease with the square root of time. The formation of metallic, sodium bridges or dendrites were observed to form across polycrystalline, beta-alumina disks. This could lead to degradation of beta-alumina when used as an electrolyte or separator in electrochemical cells. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1969
Accession Number
AD0702938

Entities

People

  • Limin Hsueh

Organizations

  • University of California, Los Angeles

Tags

DTIC Thesaurus Topics

  • Cells
  • Degradation
  • Electrochemical Cells
  • Electrolytes
  • Measurement
  • Polycrystals
  • Separators
  • Square Roots
  • Transport Ships

Fields of Study

  • Materials science

Readers

  • Battery Technology and Engineering
  • Materials Science and Engineering.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene