Synthesis and Polymorphism of Mixed Aluminum-Gallium Oxides.

ABSTRACT: The synthesis of a new solid solution of the oxyhydroxide Ga_5-xAl_xO₇(OH) is investigated via solvothermal reaction between gallium acetylacetonate and aluminum isopropoxide in 1,4-butanediol at 240 °C. A limited compositional range of 0 ≤ x ≤ 1.5 is produced, with the hexagonal unit cell parameters refined from powder X-ray diffraction (XRD) showing a linear contraction in unit cell volume with an increase in Al content. Solid-state ²⁷Al and ⁷¹Ga nuclear magnetic resonance (NMR) spectroscopies show a strong preference for Ga to occupy the tetrahedral sites and Al to occupy the octahedral sites. Using isopropanol as the solvent, γ-Ga_2-xAl_xO₃ defect spinel solid solution

SUBMITTER: Cook DS 

PROVIDER: S-EPMC7081611 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature