Black Silicon Carbide for Abrasive Paper

Black Silicon Carbide for Abrasive Paper
Product Details


Black Silicon Carbide (SIC) is produced in an electric resistance furnace from quartz sand and petroleum coke or anthracite at high temperature. The hardness and sharp particle shape of SIC make it suitable for producing of grinding wheels, coated abrasives, wire saws, superior refractory materials and deoxideiser as well as for lapping, polishing and blasting.


Chemical & Physical Properties
Crystal FormAlpha SiC hexagonal system
Chemical natureSlight acid
Reaction with acidsVery slight surface action with hydrofluoric acid
Reaction with AlkaliesAttcked at high temperature by alkalles and iron xide
Oxidation-reduction effectsStarts to oxide slowly at 800oC. No reduction
True Density (g/cm3)3.20
HardnessKnoop (kg/cm2)2200-2500
Moh's9.5
ColorBlack
Color after firingBlack
Decomposition point2200oC
Max Usable temperature1540oC in air
Specific heat (cal/g.oC)0oC500oC1000oC
0.140.280.13
Coefficient of thermal conductivity (cal/cm2.sec.oC)600oC800oC1000oC
0.0800.0610.0510
Electrical resistivity (Wcm)25oC100oC400oC800oC1400oC
5046.426.67.80.65
Coefficient of liner expansion (x10-6)25oC-500oC25oC-1000oC25oC-1500oC25oC-2000oC25oC-2500oC
4.635.125.485.775.94


Chemical Composition (by % weight)
Grit10# - 90#100# -180#220# - 220#230# - 400 #500#-1200#
SiC98.5 min98.0 min97.0 min96.0 min93.0 min
F.C0.2 max0.3 max0.3 max0.4 max0.4 max
Fe2O30.6 max0.8 max1.2 max1.5 max1.7 max



Available grain sizes
Grit No.MicronGrit No.MicronGrit No.Micron
102360 ~ 200030710 ~ 60080212 ~ 180
122000 ~ 170036600 ~ 50090180 ~ 150
141700 ~ 140040500 ~ 425100150 ~ 125
161400 ~ 118046425 ~ 355120125 ~ 106
201180 ~ 100054355 ~ 300150106 ~ 75
221000 ~ 85060300 ~ 25018090 ~ 63
24850 ~ 71070250 ~ 21222075 ~ 53




Available mircron powder sizes
China GB 2477-83
JISFEPA(84) / DIN(70)ISO(77)
Grit No.Norminal size range(µm)Grit No.ds50 value (µm)Grit No.ds50 value (µm)Grit No.ds50 value (µm)
Standard werte der Mikro-F-ReiheSedigraph 5000D
    24060.0±4.0   P24058.5±2.0
   28052.0±3.0   P28052.2±2.0
W6363 - 5032046.0±2.5F230/5353±3.050.0±3.0P32046.2±1.5
W5050 - 4036040.0±2.0F240/4544.5±2.042.0±2.0P36040.5±1.5
  40034.0±2.0   P40035.0±1.5
W4040 - 2850028.0±2.0F280/3736.5±1.534.5±1.5P50030.2±1.5
  60024.0±1.5F320/2929.2±1.527.7±1.5P60025.8±1.0
W2838 - 2070021.0±1.3F360/2322.8±1.521.6±1.5P80021.8±1.0
  80018.0±1.0F400/1717.3±1.016.5±1.0P100018.3±1.0
W2020 - 14100015.5±1.0F500/1312.8±1.012.3±1.0P120015.3±1.0
W1414 - 10120013.0±1.0     
  150010.5±1.0F600/99.3±1.09.0±1.0  
W1010 - 720008.5±0.7     
W77 - 525007.0±0.7F800/76.5±1.06.3±1.0  
W55 - 3.530005.7±0.5F1000/54.5±0.84.5±0.8  
    F1200/33.1±0.53.1±0.5      
for general purposesfor general purposesfor bonded abrasivesfor coated abrasives




Non-abrasive SiC (TN) (% by weight)

Chemical Composition
TypeSiC minF.C maxFe2O3 maxSize mm
TN9898.01.00.550-0
     13-0
     10-0
     5-0
     0.5-0
     100#-0
     220#-0
TN9797.01.50.8
TN9595.02.51.0
TN9090.03.02.5
TN8888.03.53.0
TN8585.05.03.5
TN6060.012.03.5
TN5050.015.03.5


 


Applications
Vitrified toolsLapping
Resinoid toolsBlasting
PolishingInvestment casting
TumblingWear resistance
Self-tumblingRefractory
Lapping compoundWire saw
ElectricalCeramic
ElectronicNuclear



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