|
I. Performance of the Product |
|
1). Mechanical Performance |
|
Density ρ |
2.23±0.02g/cm³ |
|
2). Thermodynamic Performance |
|
Thermal expansion coefficient |
(0-300) 3.3±0.1×10-6 |
|
Softening point |
820±10 |
|
Strain point |
516±10 |
|
Caloricity |
(20-100) 0.82KJ × (kg×K)-1 |
|
Thermal coefficient |
1.2W×mk |
|
Thermal shock resistance |
180K |
|
Strengthening type |
300K |
|
Identical temperature difference |
100K |
|
Strengthening type |
300 K |
|
Maximum working temperature Short time(<10h): |
500 ℃ |
|
Long time(>10h): |
450℃ |
|
3). Optical Property |
|
Refractive index Nd: |
1.47384 |
|
4). Electrical Property |
|
Specific resistance lgρ |
8.0Ω×cm at 250 |
|
Dielectric dissipation fraction tan σ (1 megacycle at 20): |
38×10-4 |
|
Dielectric constant |
ε=4.7 |
