SOLUBILITY OF METAL OXIDES IN SUPERCRITICAL AQUEOUS SOLUTIONS

Abstract

An effort was made to elucidate some of the basic processes underlying the growth of single crystals from hydrothermal solutions. To grow crystals by this means it is necessary to find a region where (1) the crystal is stable, (2) the solubility of the compound is sufficient, and (3) supersaturation is neither too low nor too high for growth at a reasonable rate. The study chiefly concerns measurements of the solubility of rutile in supercritical water and basic media in the temperature range 375 to 525 C under solution pressures of 5000 to 33,000 psi. The laboratory equipment and a method for measuring the equilibrium densities of the solutions are discussed. A fundamental equation is derived which, with the use of the Van't Hoff equation, permits calculation, from only a few measurements, of the solubility of metal oxides in basic hydrothermal solutions.

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Document Details

Document Type
Technical Report
Publication Date
Oct 31, 1963
Accession Number
AD0431182

Entities

People

  • R. C. Smith Jr.
  • W. J. Silva

Organizations

  • SRI International

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aqueous Solutions
  • Chemical Synthesis
  • Chemistry
  • Contracts
  • Crystal Growth
  • Electronics Laboratories
  • Equations
  • Heat Energy
  • Laboratory Equipment
  • Materials
  • Measurement
  • Metal Oxides
  • Phase Diagrams
  • Phase Transformations
  • Solid State Physics
  • Transition Temperature

Fields of Study

  • Chemistry

Readers

  • Analytical Chemistry
  • Materials Science and Engineering.