Mechanosynthesis of Disordered Rock Salt Structures: Thermodynamic and Kinetic Considerations
Xuan Zhi, Anthony R. West
Abstract
High Resolution Image Download MS PowerPoint Slide Oxide phases with a cation-disordered, cubic rock salt structure that can be prepared by mechanosynthesis include Li 2 TiO 3, Li 2 MnO 3, Li 3 NbO 4, and a new polymorph of LiAlO 2 . They are all metastable and transform irreversibly to thermodynamically stable ordered structures on heating. Li 2 TiO 3, Li 2 MnO 3, and Li 3 NbO 4 form cubic solid solutions by doping with LiF; depending on the composition, they may be stable or metastable thermodynamically. Factors that control the thermodynamic and kinetic stability of phases and their synthesis conditions are reviewed.
Topics & Concepts
MechanosynthesisMetastabilityKinetic energyPhase (matter)Materials scienceSalt (chemistry)Solid solutionThermodynamicsChemical stabilityOxideChemical engineeringChemistryPhysical chemistryMetallurgyOrganic chemistryBall millPhysicsQuantum mechanicsEngineeringFerroelectric and Piezoelectric MaterialsNuclear materials and radiation effectsLuminescence Properties of Advanced Materials