Spinel Ceramic Magnesium Aluminate

Magnesium Aluminate (Press-Ready Spinel Powder) Certificate of Analysis
Spinel Ceramic – Magnesium Aluminate
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Milling
Properties
 
ACT-3B
ACT-3PF
ACT-5B
Spinel Slip
Properties
Unit
Minimum
Maximum
Target
Minimum
Maximum
Target
Minimum
Maximum
Target
PSD                    
D10
um
0.15
1.00
0.50
0.15 1.00 0.50 0.15 1.00 0.50
D50
um
0.70
1.20
0.95
0.701.200.950.701.200.95
D90
um
1.50
4.50
2.00
1.50 4.50 2.00 1.50 4.50 2.00
Press Ready Powder
Milling
Properties
 
ACT-3B
ACT-3PF
ACT-5B
Spinel
Powder
Properties
Unit Minimum Maximum Target Minimum Maximum Target Minimum Maximum Target
Density          
Bulk
g/cc
0.80 1.00 0.90 0.77 0.97 0.87 0.80 1.00 0.90
Tap
g/cc
0.90 1.10 1.00 0.88 1.08 0.98 0.90 1.10 1.00
Pressure to
Achieve 2.00 g/cc
psi
N/A 30000 17000N/A 3000022000 N/A 3000017000
Green Strength
psi
22.0N/A30.023.0N/A35.022.0N/A30.0
Fired
(2 hrs @ 1625°C)
g/cc
3.51 NA 3.55 3.41 NA 3.45 3.51 NA 3.55
PTCR Heat
Work Temperature
°C
1675     1675     1675    
PSD of Spray
Dried Powder
(Sieve Analysis)
                   
+ No. 60 Sieve
(+ 250 um)
% N/A 10.0 5.0 N/A 10.0 5.0 N/A 10.0 5.0
+ No. 100 Sieve
(-250 um and +
149 um)
% N/A N/A N/A N/A N/A N/A N/A N/A N/A
+ No. 140 Sieve
(-149 um and +
105 um)
% N/A N/A N/A N/A N/A N/A N/A N/A N/A
+ No. 200 Sieve
(-105 um and +
74 um)
% N/A N/A N/A N/A N/A N/A N/A N/A N/A
- No. 200 Sieve
(-74 um)
% N/A 15.0 5.0 N/A 15.0 5.0 N/A 15.0 5.0
Flowability
                 
Flow Rate
(2.5 mm 25cc
Hall Flowmeter)
g/sec
0.45 N/A 0.55 0.45 N/A 0.55 0.45 N/A 0.55
Purity by GDMS
on Powder
                   
Soda
ppm
- 7500 <4000 - 7500 <4000 - 7500 <4000
Silica
ppm
- 300 <150 - 300 <150 - 1000 <500
Calcia
ppm
- 200 <150 - 200 <150 - 1000 <500
Iron Oxide
ppm
- 300 <150 - 300 <150 - 1000 <500
Yttria
ppm
- 300 <150 - 300 <150 - 1000 <500
Zirconia
ppm
- 3000 <2500 - 3000 <2500 - 3000 <2500
Others
ppm
- <200 <100 - <200 <100 - <1000 <100
Moisture
Content
                 
Residual Moisture
(120°C for
10 minutes)
wt%
0.20 1.30 0.45 0.20 1.30 0.45 0.20 1.30 0.45
Loss on Ignition
                
Weight loss
at 1625°C
wt%
7.3 8.3 7.8 9.0 11.0 7.8 7.0 9.0 7.8
Shrinkage
(1.5" disk)
% OD
18.5 20.0 19.018.5 20.0 19.0 18.5 20.0 19.0
Fired
(2 hrs @ 1625°C)
% Height
18.0 20.0 19.018.0 20.0 19.0 18.0 20.0 19.0
Phase
Composition
                
XRD (Pure Spinel +
> 2% MgO)
pass/fail
> 2% 2.40% >2> 2% 2.40% >2 > 2% 2.40% >2

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