Brown Fused Alumina is made of high-quality bauxite, anthracite and iron filings. It is cooled and smelted in a high temperature by more than 2000 degrees in an electric arc. It is crushed and shaped by a jaw crusher and a ball mill. After magnetic separation, the sieve is divided into various kinds. It’s very suitable for lapping preparation before solder surface mount component on circuit board.
Typical physical properties | |
Basic minerals: | Al2O3 |
Hardness: | Mohs:≥9 |
Melting Point: | 2200 ℃ |
Maximium service temperature | 1850℃ |
Specific Gravity: | 3.6-3.9g/cm3 |
Bulk density: | 1.53-1.99 g/cm3 |
Color: | Brown |
Particle shape: | Trigonal |
Chemical composition | |
AL2O3 | ≥95%min |
Fe2O3 | ≤0.5% |
Si2O | ≤1.5% |
Ti2O | ≤3% |
Magnetic content | / |
Available size: | |
FEPA | F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 |
JIS | 240# 280# 320# 360# 400# 500# 600# 700# 800# 1000# 1200# 1500# 2000# 2500# 3000# 4000# 6000# 8000# 10000# |
