Sub-micron E-Powders are calcined aluminum oxide powders (99%+ purity), designed for use as a functional filler to enhance the properties of a product. In Magnetic Media applications, users report a reduced drop-out count due to the gentle, continuous cleaning action to the magnetic heads from the alumina additive in the media’s surface layer. In structural ceramics and metal matrix applications, product strength is significantly improved using the sub-micron aluminas. We offer a wide selection of particle distributions and purities to meet the needs of your particular application, or a custom-engineered product can be made if required.
Product Specification (D5%, D50%, D70% by Sedigraph 5100. D0.1% by Horiba)
Product
D (0.1%)
D (0.5%)
D (50%)
D (70%)
Surface Area
IA1226
2.50
0.85 - 1.25
0.38 - 0.46
0.28 - 0.35
9 - 16 m2/gm
IA1227
n/a
0.80 - 1.10
0.30 - 0.40
0.24 - 0.34
12 - 18 m2/gm
Typical Chemical Compostion (%wt)
IA1226
Al2O3
NaO2
Fe2O3
SiO2
CaO
MgO
TiO2
IA1227
99.8
0.10
0.02
0.03
<0.01
<0.01
<0.01
Applications
* Media Filler - Video / Audio Tapes, Data Storage Devices, Ink Jet Media
* Polishing Abrasive
* Thermal Management Additive
* Frictional Additive
* Wear Resistance Additive
* Metal Matrix
* Structural Ceramics
Particle Size Control
Particle size distribution is the most important aspect to consider in using an abrasive additive. Size control in the sub-micron range requires sophisticated processing techniques. It has become increasingly important as finer and more precisely sized ingredients are required. Accurate size analysis is also critical to insure that products meet established specifications. Great care must be taken during the size analysis procedure. Particles in the sub-micron size range tend to be attracted to each other, causing agglomeration to occur. Size curves will give misleading results if a sample is not adequately dispersed. The material will appear coarser than it actually is.
