Yantai ZK Optics Co., Ltd.
Custom fabrication of high precision glass parts. Spirit of enterprise: Integrity, Pragmatism, Innovation, Win-win, Appreciation. Tenet of enterprise: the Supremacy of Customer, the Excellence in
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CNC machined threaded quartz glass nuts and tubes used for high temperature environment.
PHYSICAL PROPERTIES
| Properties | Value | |
| Mechanical Properties | Density | 2.203g/cm3 |
| Compressive Strength | 1100Mpa | |
| Bending Strength | 67Mpa | |
| Tensile Strength | 48.3Mpa | |
| Poisson's Ratio | 0.14～0.17 | |
| Young’s Modulus | 72000Mpa | |
| Rigidity Modulus | 31000Mpa | |
| Mohs Hardness | 5.5～6.5 | |
| Thermal Properties | Deformation Point | 1280℃ |
| Softening Point | 1680℃ | |
| Annealing Point | 1210℃ | |
| Specific Heat (20～350℃) | 670J/kg.℃ | |
| Thermal Conductivity (20℃) | 1.4W/m.℃ | |
| Coefficient of thermal expansion | 5.5×10-7cm/cm.℃ | |
| Hot Work Temperature | 1700～2000℃ | |
| Short-term Use Temperature | 1300℃ | |
| Long-term Use Temperature | 1100℃ | |
| Electrical Properties | Resistivity | 7×107Ω.cm |
| Dielectric Strength | 250～400Kv/cm | |
| ε/ Dielectric Constant | 3.7～3.9 | |
| Dielectric absorption coefficient | <4×104 | |
| Dielectric loss coefficient | <1×104 | |
| Solution | Treatment condition | Corrosion capacity |
| H2O | 95℃ 45(Hours) | 1~2×10-7 g/cm2 |
| 98%H2SO4 | 20℃ 2(Hours) | 1.4×10-8 g/cm2 |
| 60%HNO3 | 20℃ 2(Hours) | 5.0×10-8 g/cm2 |
| 36%HCl | 20℃ 2(Hours) | 15×10-8 g/cm2 |
| 5%NaOH | 100℃ 10(Hours) | 1.35×10-3 g/cm2 |
| 1%KOH | 98℃ 2(Hours) | 68×10-6 g/cm2 |
|
Name | Impurities ppm | ||
| Synthetic (CVD)JGSI | Oxy-hyd melting JGS2 | Electrical melting JGS3 | |
| Al | 0.16 | 17.00 | 14.44 |
| Fe | 0.01 | 0.36 | 1.46 |
| Ca | 0.31 | 1.30 | 2.45 |
| Mg | 0.65 | 0.22 | 0.46 |
| Ti | 0.08 | 1.3 | 4.84 |
| Cu | 0.01 | 0.04 | 0.16 |
| Ni | 0.01 | 0.01 | 0.04 |
| Co | 0.04 | 0.01 | 0.02 |
| Mn | 0.01 | 0.03 | 0.08 |
| K | 0.34 | 0.63 | 2.16 |
| Na | 0.06 | 1.11 | 1.33 |
| Li | 0.01 | 0.63 | 0.81 |
| B | / | 0.08 | 0.05 |
| OH | 1100~1300 | 150~250 | 1~120 |
| SiO2 | >99.999% | 99.99% | 99.92% |
