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Calcined with Medium Temperature Treatment Brown Fused Alumina

High-temperature calcined brown fused alumina is calcined at high temperature in the production process of original brown corundum, and then annealed. Its is characterized by low expansion coefficient, excellent hydrophilicity, good toughness and high strength.
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  • F4-F240

  • SEPPE

  • 20220511


Introduction

High-temperature calcined brown fused alumina is calcined at high temperature in the production process of original brown corundum, and then annealed. Its is characterized by low expansion coefficient, excellent hydrophilicity, good toughness and high strength.


The sintered abrasives produced have the characteristics of dark blue color after firing, no resillage and no rust spots, etc. So this kind of product increase the precision and grinding effect of the abrasives during processing. Brown Fused Alumina with high temperature treatment is especially suitable for the production of high-grade bonded abrasives.



Technical Data


Application


Specification

                      Chemical composition(%)
Magnetic material content(%)
Al2O3Fe2O3SiO2TiO2



Abrasive



       F

4#-80#≥95


≤0.2


≤1.5


≤3.0

≤0.03
90#-150#≥94≤0.03
180#-240#≥93.5≤0.31.5≤3.5≤0.03




Physical composition
ItemSpecification
ColorCambridge Blue
Crystal SystemAlpha-alumina trigonal system
Mohs  Hardness≥9.0
Melting Temperature (℃)2050
Refractory Temperature (℃)1800
True Density≥3.90
Magnetic Material0.0082%