Accession Number:

ADA583060

Title:

Synthesis of Carbonate-Based Micro/Nanoscale Particles With Controlled Morphology and Mineralogy

Descriptive Note:

Final rept.

Corporate Author:

ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB

Report Date:

2013-04-01

Pagination or Media Count:

27.0

Abstract:

Biological structural materials such as bone, nacre and fish scales utilize unique material structures and chemistry, especially nanoscale structures to provide high strength as well as high ductility. To incorporate these design principles into the material design, novel synthesis methods need to be developed to fabricate composites with controlled morphology, orientation, organization and chemistry at nanoscale. In this study, the mineralogy and morphology of carbonate-based micronanoscale particles precipitated by reacting NH42CO3 with mixed Ca, Sr, Mg, and Mn-acetates was investigated. As the proportion of the non-Ca component increased, the products shifted toward double carbonates and mixtures of double carbonates with single carbonates. Characterization by Scanning Electron Microscopy SEM and X-Ray Diffraction XRD to determine crystal sizes, morphology, and structure of precipitated phases indicated a potential for re-crystallizing the products to form new composite materials. Ongoing research efforts are focused on using information obtained in the present study to develop composites by hydrothermal recrystallization of metastable phases.

Subject Categories:

  • Inorganic Chemistry
  • Organic Chemistry
  • Physical Chemistry
  • Geology, Geochemistry and Mineralogy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE