Osm Physics by Ashish

  Spray Pyrolysis  1. Introduction to Spray Pyrolysis Spray Pyrolysis (SP) is a versatile, aerosol-based process for the synthesis of thin films, nanoparticles, and powders . It involves spraying a precursor solution onto a heated substrate (or through a hot zone), where the droplets undergo evaporation, solute precipitation, pyrolysis (thermal decomposition), and sintering to form the desired material. Core Principle: Liquid aerosol droplets → Solvent evaporation → Solute decomposition → Solid film/particle formation via thermal energy 2. Process Schematic 3. Fundamental Stages of Spray Pyrolysis Each droplet undergoes the following sequence: Stage 1: Atomization The precursor solution is converted into fine droplets (1–100 μm diameter). Stage 2: Droplet Transport Droplets travel toward the heated substrate through a carrier gas. Stage 3: Solvent Evaporation As the droplet approaches the hot zone, solvent evaporates: Stage 4: Solute Pr...