APPLICATION OF INFRARED SPECTROSCOPY TO THE STUDY OF THE PROCESS OF THERMAL DEHYDRATION OF MONOSUBSTITUTED PHOSPHATES OF MAGNESIUM AND CALCIUM,

Abstract

By the IR spectrum method it was established that the final product of thermal dehydration of Mg(H2PO4)2.2H2O is the cyclic tetrametaphosphate of magnesium. Acid ortho- and pyrophosphates of magnesium appear as intermediate condensation products. A diagram of the process of dehydration of Mg(H2PO4)2.2H2O is given. Thermal dehydration of Ca(H2PO4)2.H2O leads to the formation at 450-500 of an amorphous metaphosphate of calcium of the type Metal (II) (PO3)2)n, passing to the crystalline state at 600C. The formation of complex mixtures of calcium polyphosphates is characteristic for temperatures below 400C. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 05, 1969
Accession Number
AD0697710

Entities

People

  • A. S. Shulman
  • L. N. Shchegrov
  • R. Ya. Melnikova
  • S. S. Gusev
  • V. V. Pechkovskii

Organizations

  • National Air and Space Intelligence Center

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Complex Mixtures
  • Condensation
  • Dehydration
  • Infrared Spectroscopy
  • Magnesium
  • Metals
  • Spectra
  • Spectroscopy
  • Transition Temperature

Readers

  • Organic Chemistry
  • Surface Engineering/Surface Coating Technology.