Fineness and purity ...Tokuyama’s AlN powder will provide a future for ceramics
(SEM Images of AlN Powders)
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| Characteristics |
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| 1. |
Purity |
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Very low metallic impurities. |
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Low oxygen content: suitable for raw material of AlN ceramics. |
| 2. |
Particles |
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Mean size of aggregate is 1.1 μm : very sharp size distribution. |
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The primary particle diameter is about 0.6μm. The surface of the particles is oxidized and stabilized. |
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Good dispersibility: suitable as additives. |
| 3. |
Sinterability |
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Excellent sinterability. Translucent ceramics with either hot-pressing or pressure-less sintering. |
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| Major Applications |
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| 1. |
Material for high thermal conductivity ceramics |
| 2. |
As a raw material for Si-Al-O-N compounds |
| 3. |
As a raw material for high-temperature, strengthened ceramics |
| 4. |
As an additive |
| 5. |
As a filler |
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| Table 1: Elemental Analysis |
Grade |
Unit |
H |
| Impurities |
O |
% |
0.83 |
C |
ppm |
206 |
Ca |
ppm |
226 |
Si |
ppm |
43 |
Fe |
ppm |
43 |
*Values are typical; they do not guarantee the composition.
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| Table 2: Physical Properties |
Grade |
Units |
H |
| Crystal Phase |
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Uniphase AlN |
| Tapped Density |
g/cm3 |
0.43 |
| Pressed Density |
g/cm3 |
*1.68 |
| BET relative Surface Area |
m2/g |
2.59 |
| Mean Particle Diameter |
μm |
1.13 |
| Color |
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White |
α-ray radiation
(reference value) |
counts/cm2h |
0.03 |
*Pressed at 19.6MPa.
*Values are typical; not for specification
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| Figure 1: Particle Size Distribution(Laser Diffraction Method) |
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