PROPERTIES OF ULTRAFINE GRAINED BATI03 SUPER-PRESSED AT LOW TEMPERATURES.

Abstract

High purity, ultra-fine-grained BaTi03 powder has been densified by 'squeezing' in a hexahedral press at pressures of 50 kilobars and temperatures in the range of 125 to 720 C. X-ray diffraction patterns of the pressed material indicate that strain and/or particle reduction have resulted from application of the pressure. Electrical data show that a wide range of dielectric constants were obtained for these bodies, depending on the pressing temperatures. The bodies showed a high degree of temperature stability of dielectric constant due to complete suppression of the curie temperature. Samples having an ultra-fine grained (0.05 microns), uniform microstructure have been obtained. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1966
Accession Number
AD0639226

Entities

People

  • R. J. Brandmayr

Organizations

  • United States Army Communications-Electronics Command

Tags

DTIC Thesaurus Topics

  • Absorbers (Materials)
  • Advanced Materials
  • Curie Temperature
  • Dielectric Permittivity
  • Diffraction
  • Engineered Materials
  • Low Temperature
  • Materials
  • Microstructure
  • Particle Size
  • Particles
  • Powders
  • Ultrafines
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Surface Engineering/Surface Coating Technology.