Functional Nano Structure Materials Lab. Research

Ceramic Powder Synthesis

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Powder synthesis processes

Approach strategy to Nanoparticle

Top-Down appr.

Bottom-up appr.

Top-Down appr.
  • Milling technique
  • Involves mechanical thermal cycles yields
    • Broad size distribution (10-1,000 nm)
    • Varied particles shape or geometry
    • Impurities
Bottom-up appr.
  • Precursor based chemical reaction
  • Phase classification:
    • Gas (Vapor) phase:

      - Pyrolysis, Inert gass condensation, …

    • Liquid phase:

      - Solvothermal reaction

      - Sol-gel reaction

      - Micoremulsion method

    • **Solid-sate phase (Intermediate appr.)
  • ** = Self-assembly appr.

Powder synthesis method

Co-precipitation method

  • Uniform distribution of size distribution, homogeneous powder
  • Easy to manufacture due to low firing temperature
  • Mass production possible
  • Powder size not adjustable
  • Handling process such as impurity control (washing)

Hydrothermal (Solvothermal) method

  • Fast reaction speed, excellent dispersibility: Easy to manufacture uniformly
  • Possible to control particle shape, size composition and purity
  • High facility cost, operation cost
  • Slow Growth Rate

Sol-Gel method

  • Spontaneous mixing of multicomponent solutions: uniform
  • Low temperature synthesis possible
  • Increase production efficiency
  • Drying process time, cost
  • High cost of materials
  • Sensitive to moisture

Solid State Reaction method

  • Simple process
  • Economics
  • Requires high thermal energy due to low solid reaction
  • Mixing, pulverizing by mechanical method: heterogeneity such as size, shape↑

Application of Ceramic Powder_YSZ

Cubic Zirconia


Solid Oxide Fuel Cell

Oxygen sensor

Thermal Barrier Coating of high Efficiency gas turbine

Application of Ceramic Powder_MgO


Heat resistance cable

Bio ceramic

Metal oxide catalyst

Solid oxide fuel cell