Solid-phase reaction mechanism and microwave dielectric properties of Mg2GeO4-MgAl2O4 composite ceramics

Solid-State Reaction Synthesis of MgAl2O4 Spinel from MgO–Al2O3 Composite Particles Prepared via Electrostatic Adsorption

“…Bead milling (BM) is a common method for preparing the initial mixture for MAS synthesis. Recently, this method has been used to fabricate γ-Al 2 O 3 + MgO, θ/α-Al 2 O 3 + MgO, α-Al 2 O 3 and MgO nanopowders as well as MgO–Al 2 O 3 –GeO 2 mixtures. − Mechanical activation is an important method for reducing particle sizes, shortening diffusion lengths, and accelerating reactions. − Moreover, material deformation and defect formation also occur during mechanical activation, which generally increases the free energy of the system.…”