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| >Machined products |
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>Press cast products |
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| Noritake’s technology is capable of meeting
strict requirements for dimensional accuracy in microns as well
as a mirror surface finish. It is best suited for ultra-precision
instrument parts requiring wear resistance, high-precision analyzers
for medical/chemical use, and food-industry-oriented equipment
requiring corrosion resistance. |
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| Material type |
Unit |
Alumina, 92% or
less |
Alumina, 96% |
Alumina, 99% or
more |
Zirconia |
Silicon nitride |
| Physical
characteristics |
Chemical
composition |
|
Al2O3
|
Al2O3
|
Al2O3
|
ZrO2 |
Si3N4
|
| Tone |
|
White |
White |
White |
Light
yellow |
Gray |
| Bulk
specific gravity |
|
4 |
4 |
4 |
6 |
3 |
| Mechanical
characteristics |
Bending
strength |
MPa |
290 |
320 |
350 |
700 |
720 |
| Hardness
(HV) |
GPa |
13 |
15 |
17 |
12 |
15 |
| Fracture
toughness (K1C) |
MN/m3/2
|
4 |
4 |
4 |
7 |
6 |
| Young’s
modulus |
GPa |
260 |
330 |
380 |
200 |
300 |
| Thermal
characteristics |
Thermal
expansion (R.T. to 800°C) |
x
10-6/K |
7 |
8 |
8 |
11 |
3 |
| Thermal
conductivity (R.T. to 800°C) |
W/mK |
20 |
25 |
30 |
4 |
30 |
| Thermal
shock resistance (ΔT) |
°C |
200 |
200 |
200 |
350 |
600 |
| Electrical
characteristics |
Volume
resistivity (R.T.) |
Ω·cm |
>1014
|
>1014
|
>1014
|
|
|
| Permittivity
(1 MHz) |
|
10 |
10 |
10 |
|
|
| Dielectric
strength |
KV/mm |
11 |
11 |
11 |
|
|
| Applicability
table |
Machined
products |
O |
O |
O |
O |
O |
| Press
cast products |
O |
O |
O |
O |
× |
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