| III. Performance of the Product |
| 1). Mechanical Performance |
| Density ρ |
2.23±0.02g/cm3 |
| 2). Thermodynamic Performance |
| Thermal expansion coefficient |
(0-300) 3.3±0.1×10-6K-1 |
| Softening point |
820±10 |
| Strain point |
516±10 |
| Caloricity |
(20-100) 0.82KJ × (kg×K)-1 |
| Thermal coefficient |
1.2W×m×K-1 |
| 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). Chemical Performance |
| Water resistance |
ISO719/DIN12111 HGB1/ISO720 HGA1 |
| Acid resistance |
ISO1776/DIN12116 1 |
| Alkali resistance |
ISO695/DIN52322 A2 |
| 4). Optical Property |
| Refractive index Nd: |
1.47384 |
| Transmittance spectrum curve |
| 5). 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 |
