| 
 | 
 | 
 | 
 | 
 | 
  Black Silicon Carbide
  Green Silicon Carbide
  Boron Carbide
  White Aluminum Oxide
  Brown Aluminum Oxide
  Calcined Alumina
  Reactive Grade Alumina
   MR-32
   MR-41
   MR-42
   MR-52
   MR-70
  Polishing Grade Calcined Alumina
  Sub Micron Alumina
  Nano Sized Alumina
  Sinterable Silicon Carbide Powders
  Refractory Materials
  Abrasive Media
  Lapping Slurries
  Spherical Media
  Fumed Silica
  Cast Polymer Fillers
  Surplus Raw Materials
   
   
   
   
   
   
   
   

Reactive Grade Alumina MR-70

The MR-70 reactive alumina from Martinswerk is well suited for production of thick and thin film substrates for electronic applications by tape-casting/manufacturing of oxide ceramics demanding an extremely high Al2O3 content. The MR-70 is well suited for applications subjected to extremely high mechanical, thermal, and electrical and chemical loads. With an average particle size of 0.5-0.7 microns and <0.1% Na2O, this powder is a highly reactive binding agent for superior technical ceramics.

 
Typical Analysis
(Al2O3)
99.8%
(MgO doped)
»0.1%

(SiO2)

0.06%
(Fe2O3)
0.01-0.03%
(Na2O)
<0.01%
(CaO)
0.01-0.05%
Alpha Al2O3
>90%
Loss on Ignition
<0.2%
Specific Surface Area (BET)
6.0-10.0 m2/g
Primary Crystal Size
»0.5 um
Bulk Density
»1100 kg/m3
 
Pressed Density: (50 Mpa) 2.2 g/cc
Fired Density: (1600°C, 2hr) 2.7 g/cc
 
Typical Particle Size Distribution

d10

0.2-0.4
um
d50
0.5-0.7
um
d90
1.3-2.1
um
0%
>45
um
 
 


320 Constance Drive | Warminster | Pennsylvania | 18974 | P (215) 444-9315 | F (215) 444-9317