Properties of Barium and Lanthanum Hexaaluminates Prepared by Solid-State reaction And Self-propagating High-Temperature Synthesis

摘要

The catalytic activity, specific specific surface area, and electron paramagnetic resonance of substituted bar- ium hexaaluminates prepared via mechanical activation are studied. Unsubstituted barium and lanthanum hexaaluminates are characterized by x-ray diffraction. Self-propagating high-temperature synthesis is shown to be a promising technique for preparing melted barium hexaaluminate. Electron-microscopic examination of melted and fracture surfaces reveals microstructural features that are believed to be responsible for the high strength of the material.