Powders for Video tapes
| Grade |
CH417-D |
CH417-C |
CH605-B |
CH605-A |
| Coercivity |
kA/m
(Oe) |
≥305
(≥380) |
≥36.0
(≥450) |
≥50
(≥625) |
≥56.8
(≥710) |
Ratio
of Saturated
Magnetized Intensity |
Am2/kg |
≥72 |
≥73 |
≥75 |
≥75 |
| Tap
Density |
g/cm3 |
≥0.85 |
≥0.80 |
≥0.85 |
≥0.85 |
| B.E.T. |
m2/g |
≥22.5 |
≥24 |
≥24 |
≥27 |
| O.A. |
ml/100g |
<53.5 |
<55 |
<55 |
<55 |
| Content
of Chloride |
% |
<0.5 |
<0.5 |
<0.5 |
<0.5 |
| Long
Diameter of Particle |
μm |
0.35-0.4 |
0.3-0.4 |
0.3-0.4 |
0.2-0.3 |
| Ratio
of Axes |
|
≥8:1 |
≥8:1 |
≥8:1 |
≥10:1 |
| Adsorb
Water |
% |
<0.5 |
<0.5 |
<0.5 |
<0.5 |
| Ratio
of Rectangle |
|
0.5 |
0.5 |
0.55 |
0.55 |
Powders for Audio tapes
| Grade |
YZ882-1 |
YZ883-2 |
YZ883-3 |
| Coercivity |
kA/m
(Oe) |
≥23.1
(≥230) |
≥26.3
(≥230) |
≥23
(≥360) |
Ratio
of Saturated
Magnetized Intensity |
Am2/kg |
≥70 |
≥70 |
≥71 |
| Tap
Density |
g/cm3 |
≥0.80 |
≥0.85 |
≥0.80 |
| B.E.T. |
m2/g |
≥17 |
≥19 |
≥22 |
| O.A. |
ml/100g |
<42 |
<42 |
<47 |
| Content
of Chloride |
% |
<0.5 |
<0.5 |
<0.5 |
| Long
Diameter of Particle |
μm |
0.5-0.6 |
0.5-0.6 |
0.35-0.4 |
| Ratio
of Axes |
|
≥7:1 |
≥7:1 |
≥7:1 |
| Adsorb
Water |
% |
<0.5 |
<0.5 |
<0.5 |
| Ratio
of Rectangle |
|
0.5 |
0.5 |
0.5 |
|
|
|
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