Effect of Powder Characteristics on Dielectric Properties Alumina Compacts,

Abstract

Three different submicronic alumina powders have been analyzed. The sintering and microstructural evolution of the different green compacts have been studied by dilatometry and SEM, respectively. Dense (> 99 % th) alumina samples were used for the measurement of the dielectric properties at 20 GHz. The dielectric properties have been related to the impurities content, grain size distribution, porosity, etc. The important effect of small quantities of MgO in solid solution on the microwave absorption of alumina compacts has been pointed out.

Document Details

Document Type
Technical Report
Publication Date
Apr 27, 1992
Accession Number
ADP007735

Entities

People

  • J. Molia
  • J. Requena
  • J. S. Moya
  • P. Miranzo
  • R. Moreno

Organizations

  • Spanish National Research Council

Tags

DTIC Thesaurus Topics

  • Absorbers (Materials)
  • Absorption
  • Advanced Materials
  • Dielectric Properties
  • Engineered Materials
  • Grain Size
  • Impurities
  • Materials
  • Materials Processing
  • Measurement
  • Microwaves
  • Personal Information Managers
  • Porosity
  • Sintering
  • Solid Solutions

Fields of Study

  • Materials science

Readers

  • Microwave Engineering.
  • Powder metallurgy of Titanium alloys.