The carbon nanotube is produced by vapor phase method，Depended on different from processor controlling carbon grown that will be different to diameter and length。The Vapor Grown Graphite Tube( VGGT) must be graphitized by super high temperature and physical treated specially to handle easily。
There are superior in thermal conductivity；electrical conductivity；lubricity；resilience；adsorptive capability and strength，so VGGT has many applications。
VGGT Property：
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Fine Structure --- Onion type
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Diameter --- 100 ~ 500 nm
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Aspect Ratio --- 10 ~ 500
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Real Density --- 1.8 ~ 2.0 g/cc
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Graphitized --- ＞80%
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Electrical Conductivity --- ρ= 6 × 10-7 Ω.m
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Thermal Conductivity --- K ＞ 1600 w/mk
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Thermal Expension --- -1.0 ppm/℃
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Mechanical --- High Strength
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For LIB Spec：
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Typical properties
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Unit
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X Brand
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UNITETEK
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Fiber diameter
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nm
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Average 150
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Average 110
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Fiber length
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μm
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10 ~ 20
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3 or 7
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Aspect ratio
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10 ~ 500
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30 or 70
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Real density
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g/cm3
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2.0
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2.0
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Bulk density
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g/cm3
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0.04 ~ 0.08
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0.10 ~ 0.18
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Specific surface area
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m2/g
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~ 13
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20
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Crystal
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Co
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A=10-10m
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6.78
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6.78
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Lc
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A
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400
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400
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Electrical
Conductivity
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Powder
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Ωcm
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0.012
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0.016
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Single filament
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Ωcm
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1 × 10-4
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6 × 10-5
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Ash content
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％
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0.1
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＜0.1
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Package：5KG/10KG/Carton
