Over decades, mechanochemical activation has been explored to synthesize oxide-based ceramic nanopowders, enabling shorter production cycles. This book offers an overview of the progress made in the field and provides a detailed look at the wide range of applications facilitated by the development of the mechanochemical activation technique. With chapters covering ferroelectric materials, ferrite ceramics with magneto-dielectric properties, mullite ceramics with controllable microstructure and anisotropic grain growth behaviours, it is a valuable reference for advanced students, researchers and engineers in materials science and engineering, applied physics, solid-state lasers and solid-state physics.