CLEARCERAM®-Z EX
OHARA added a new product line-up to its CLEARCERAM® series.
The newly introduced “CLEARCERAM®-Z EX” product shows “a state of the art” low thermal expansion characteristic.
The new product features extremely low temperature dependence of thermal expansion in 0 to 50degree C, which is less than half of the present high spec grade (CLEARCERAM®-Z HS).
At practical usage, CLERACERAM®-Z EX absorbs more environmental temperature changes and may relax users’ effort to control it.
| CLEARCERAM®-Z |
Regular |
HS |
EX |
| Thermal Properties |
Coefficient of Thermal(0～50°C) α (10-7/°C) |
0.0±1.0 |
0.0±0.2 |
0.0±0.1 |
| Thermal Conductivity k (W/m·°C) |
1.51 |
1.54 |
1.49 |
| Mechanical Properties |
Young's Modulus E (GPa) |
90 |
92 |
91 |
| Rigidity (GPa) |
36 |
37 |
36 |
| Poisson Ratio |
0.25 |
0.25 |
0.26 |
| Knoop Hardness Hk |
600[6] |
590[6] |
620[6] |
| Abrasion Aa |
62 |
62 |
62 |
| Bending Strength (MPa) |
116 |
122 |
126 |
| Specific Gravity d |
2.55 |
2.55 |
2.54 |
| Optical Properties |
Refractive Index |
nd |
1.546 |
1.546 |
1.544 |
| 1550nm |
1.528 |
1.528 |
1.526 |
| Abbe Number νd |
55.5 |
54.9 |
55.8 |
| Internal Transmittance (10mmt) |
500nm |
>0.85 |
>0.82 |
>0.85 |
| 980nm |
>0.98 |
>0.98 |
>0.98 |
| 1550nm |
>0.98 |
>0.98 |
>0.98 |
| Chemical Properties |
Water Resistance (Powder) RW(P) |
Class2 |
Class1 |
Class1 |
| Acid Resistance (Powder) RA(P) |
Class1 |
Class1 |
Class1 |
| Alkali Resistance (Powder) Ralk(P) |
0.25% |
0.19% |
0.18% |
| *Values are subject to change for improvement. |
