NISSHINBO

New Carbon Material

Glass-like carbon coat (AC Coat)

Glass-like carbon coat (AC Coat) is a technique to make the combination of graphite particle secure and cover the surface of graphite by glass like carbon. Particular resin is soaked and coated on graphite base materials and it transformed to Glass-like carbon by carbonization. Soaking treatment for infiltrating and Coating treatment for closing surface pores are available.

Images of Glass like carbon Coat

Graphite Particle Glass-like carbon layer

Before treatment
Before treatment
Soaking treatment
Soaking treatment
Soaking and Coating treatment
Soaking and Coating treatment

Features

  • AC Coat prevents scattering dust from graphite material.
  • AC Coat prevents discharging gas from graphite material.
  • AC Coat prevents gas penetration into graphite material.
  • AC Coat can infiltrate into graphite material.
  • AC Coat prevents graphite material from reaction to metal or glass.
  • AC Coat is applicable to graphite products of various shapes.

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Properties

  • Item Unit Base graphite
    material density    		 Before
    treatment    		 Soaking
    treatment    		 Soaking & Coating
    treatment
    Thickness of Glass-like carbon layer µm 1.8 – <1 2∼3
    In filtrated depth µm 1.8 – ≧1200 ≧1000
    Gas impermeability m3(STP)
    m-2min-1
    MPa-1    		 1.7 9 9 9×10-1
    1.8 3 1 1×10-1
    2.0 1×10-1 4×10-1 4×10-6
    Flexural strength MPa 1.8 38 42 46
    2.0 78 82 98
    Elastic modulus GPa 1.8 6.6 8.3 9.1
    2.0 11.6 13.6 13.6

  • Prevention of graphite particle
    Prevention of graphite particle

    * Testing Method
    5 minutes Ultrasonic treatment in filtered water was given to samples. Then, particles in the water were counted by particle counter.

  • Gas impermeability
    Gas impermeability

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Application

  • Crucibles for deposition
  • Jigs for electrical parts assembly
  • Jigs for semiconductor, PV cell and FPD manufacturing
  • Parts to be used at high temperature and in vacuum environment
  • Particle decreasing for graphite parts
  • Jigs for hermetic seal

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Product & Service Info