Accession Number:

AD1058885

Title:

Structural Effects of Lanthanide Dopants on Alumina

Descriptive Note:

Journal Article - Open Access

Corporate Author:

Department of Mechanical Engineering and Temple Materials Institute, Temple University Philadelphia United States

Report Date:

2017-01-06

Pagination or Media Count:

9.0

Abstract:

Lanthanide Ln3 doping in alumina has shown great promise for stabilizing and promoting desirable phase formation to achieve optimized physical and chemical properties. However, doping alumina with Ln elements is generally accompanied by formation of new phases i.e. LnAlO3, Ln2O3, and therefore inclusion of Ln-doping mechanisms for phase stabilization of the alumina lattice is indispensable. In this study, Ln-doping 400 ppm of the alumina lattice crucially delays the onset of phase transformation and enables phase population control, which is achieved without the formation of new phases. The delay in phase transition , and alteration of powder morphology, particle dimensions, and composition ratios between - and -alumina phases are studied using a combination of solid state nuclear magnetic resonance, electron microscopy, digital scanning calorimetry, and high resolution X-ray diffraction with refinement fitting.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE