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Static electrification

The term static electrification is often used.
It refer to the accumulation of static electricity generated on an object.
Actually, this amount of charge that affect the trouble caused by static electricity.

<Table>The criterion of resistivity and electrification of an object* The unit of the conductivity is S(siemens )/m

Volume Resistivity[Ω,m ]  104 106 108 1010 1012 1014
Conductivity[S/m] 104 106 108 1010 1012 1014
Surface Resistivity [Ω] 106 108 1010 1012 1014 1016
Leak Resistance[Ω]  103 104 106 108 1010 1012
Ease of Electrification High Little Not  Little Middle  High Too High
The Speed Of Decrement Instant Instant Instant  A few seconds A few minutes Tens of minutes No decrement
  • The charge amount charged in the glass, as shown in the above table, very high and can be a greater problem caused by the generation of static electricity.
CNT Types and Characteristics

CNT (Carbon nano tube) is a tube-shaped and nanometer-sized diameter of carbon. It has features such as high thermal / electrical conductivity, high strength and chemical stability.

  • Current density : 1 × 109 a/cm² (1,000 times of copper)
  • Thermal conductivity : 6,000 w/m·k (10 times of copper)
  • Tensile strength : 3 × 1010 pa (20 to 100 times of steel)
  • Elastic modulus : 2 to 7 times of steel
Characteristic of Carbon Nanotube

When even a small amount of carbon nanotube is mixed with existing polymer materials greatly improved in mechanical properties and electrical conductivity etc.

The electrical conductivity characteristic of the carbon nanotube is increasing dispersion speed of charge. In addition, the carbon nanotube is an eliminating static electricity substance that can be discharged immediately about triboelectric.

Field emission effect of carbon nanotube

When raised the electric current with constant interval to the carbon nanotube plate in a vacuum, It shows that exported electric field has been detected in the around.
It appears that carbon nanotube has its own electrostatic discharge effect.
There is no specific state in the low electric current. While gradually rising up to 3.7 V/μm, the electric current reaches the maximum electric current value of 2.9mA.
And the breakdown occurs with its own emission at this moment.