HENAN LIANXING FOREIGN TRADE CO.,LTD.
Address:No.159 Jiankang Road, Zhengzhou, Henan Province, China
TEL : +86-371-60229888 56617687
FAX: +86-371-60229777
Email:info@lianxingabrasives.com
PC:450012
Product Description: Black Silicon Carbide is produced in an electric resistance furnace from quartz sand and petroleum coke or anthracite at high temperature. The hardness and sharp particle of this material make it suitable for manufacturing of grinding wheels, coated products, wire saws, superior refractory materials and deoxide as well as for lapping, polishing and blasting. Chemical & Physical Properties Crystal Form Alpha SiC hexagonal system Chemical nature Slight acid Reaction with acids Very slight surface action with hydrofluoric acid Reaction with Alkalis Attacked at high temperature by alkalis and iron oxide Oxidation-reduction effects Starts to oxide slowly at 800°C. No reduction True Density (g/cm3) 3.20 Hardness Knoop(kg/cm2) 2200-2500 Moh's 9.5 Color Black Color after firing Black Decomposition point 2200°C Max Usable temperature 1540oC in air Specific heat (cal/g.°C) 0°C 500°C 1000°C 0.14 0.28 0.13 Coefficient of thermal conductivity (cal/cm2.sec.°C) 600°C 800°C 1000°C 0.080 0.061 0.0510 Electrical resistivity ( Wcm) 25°C 100°C 400°C 800°C 1400°C 50 46.4 26.6 7.8 0.65 Coefficient of liner expansion (x10-6) 25°C-500°C 25°C-1000°C 25°C-1500°C 25°C-2000°C 25°C-2500°C 4.63 5.12 5.48 5.77 5.94 Chemical Composition (% by weight) Grit sizes SiC F.C Fe2O3 12# - 90# 98.5 min 0.20 max 0.60 max 100# - 180# 98.0 min 0.30 max 0.80 max 220# - 240# 97.0 min 0.30 max 1.20 max Available sizes: can be produced by customer's requirements. Packing way: 25kgs or 50kgs packed in three layers bags or can be packed on customer's request. You are welcome to contact our sales department if you are interested or want to get more information.
Crystal Form
Alpha SiC hexagonal system
Chemical nature
Slight acid
Reaction with acids
Very slight surface action with hydrofluoric acid
Reaction with Alkalis
Attacked at high temperature by alkalis and iron oxide
Oxidation-reduction effects
Starts to oxide slowly at 800°C. No reduction
True Density (g/cm3)
3.20
Hardness
Knoop(kg/cm2)
2200-2500
Moh's
9.5
Color
Black
Color after firing
Decomposition point
2200°C
Max Usable temperature
1540oC in air
Specific heat (cal/g.°C)
0°C
500°C
1000°C
0.14
0.28
0.13
Coefficient of thermal conductivity (cal/cm2.sec.°C)
600°C
800°C
0.080
0.061
0.0510
Electrical resistivity ( Wcm)
25°C
100°C
400°C
1400°C
50
46.4
26.6
7.8
0.65
Coefficient of liner expansion (x10-6)
25°C-500°C
25°C-1000°C
25°C-1500°C
25°C-2000°C
25°C-2500°C
4.63
5.12
5.48
5.77
5.94
Grit sizes
SiC
F.C
Fe2O3
12# - 90#
98.5 min
0.20 max
0.60 max
100# - 180#
98.0 min
0.30 max
0.80 max
220# - 240#
97.0 min
1.20 max