Table 1 Hardness and thermal expansion values
From: Development of phosphors with high thermal stability and efficiency for phosphor-converted LEDs
Material | Hardness, GPa | Thermal expansion, 10−6/K |
|---|---|---|
SiC | 24.5-28.2 | ~3 |
Si3N4 | 16-20 | 2.8-3.2 |
YAG | 13.6 | ~2 |
Silicates | 9-13 | 3.3-7 |