Preparation of Hard Oxide Films on Evaporated Aluminum Surfaces and Applications of Such Films

Abstract

Data are presented on the formation and properties of oxide films produced on evaporated aluminum mirrors. These oxide films are produced at various temperatures in air, or by means of anodic oxidation in ammonium tartrate. Applications of anodically produced films are discussed with respect to reflection-type interference filters, and temperature-resistant films for electron diffraction and electron microscope investigations. The anodically produced films can be precisely controlled in thickness, and are 1.38 times thicker than the aluminum layers replaced. The current efficiency of the process is 80% and the thickness of the oxide layer formed in a given length of time increases linearly with the applied voltage (13.0 per v for 2 min anodizing time).

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Document Details

Document Type
Technical Report
Publication Date
Jul 28, 1949
Accession Number
ADA283098

Entities

People

  • Georg Hass

Organizations

  • United States Army Engineer Research and Development Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aluminum
  • Anodic Coatings
  • Anodizing
  • Chemical Synthesis
  • Chemistry
  • Coatings
  • Hydroxides
  • Infrared Equipment
  • Infrared Optical Materials
  • Materials Processing
  • Metals
  • Optical Materials
  • Oxidation
  • Oxide Films
  • Physical Properties
  • Protective Coatings
  • Refractive Index

Readers

  • Optical Physics and Photonics.
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene