Accession Number:

AD0759259

Title:

Coordination Chemistry and Kinetics of Preferential Etching on Surfaces of TiO2 (Rutile).

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s):

Report Date:

1973-04-30

Pagination or Media Count:

33.0

Abstract:

Three different types of etch pits were observed on the 001 surfaces of rutile after etching in a KHSO4 flux at temperatures between 400 and 550C. A chemical reaction scheme is presented, which along with a consideration of the surface chemistry of the various crystallographic faces, is used to explain the kinetics of dissolution of the substrate and hence the observed shapes of the etch pits. Etching of a defect is enhanced in surface regions where silver is photochemically deposited and removed prior to the etching. This phenomenon is explained in terms of a hole or electron trapping mechanism at a crystal defect. Author

Subject Categories:

  • Crystallography
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE