National Service Phone:
15174082708
National Service Phone:
15174082708
Chemical properties
Quartz glass is acidic materials, except hydrofluoric acid and hot phosphoric acid, on any other acids were shown to be inert, is the best anti acid materials. At room temperature, alkali and salt on quartz glass corrosion degree isminimal, so do not rule out in these reagents are used in the quartz glass.
Transparent quartz glass than opaque quartz glass has better chemical stability, this is because the latter becausethe bubbles exposed to corrosive liquid superficial area has increased by.
| A variety of solution weight loss of quartz glass | |||||
| Solution name |
Density （比重） |
（℃） |
Etching time（ 小時） |
Loss of weight （g/㎡） |
|
| Transparent quartz glass | Opaque quartz glass | ||||
| Hydrochloric acid | 1.19 | 60 | 24 | 0.031 | 0.16 |
| Nitric acid | 1.40 | 115 | 24 | 0.11 | 0.15 |
| Sulfuric acid | 1.84 | 205 | 24 | 0.06 | 0.13 |
| Hydrofluoric acid | 38% |
室溫 （22℃） |
2 | 259.39 | 379.80 |
| Phosphoric acid | -- | 200 | 15 | 微量 | -- |
| -- | 300 | 15 | 58.00 | -- | |
| Sodium hydroxide | 1% | 101 | 2 | 0.80 | 5.15 |
| Sodium hydroxide | 1% | 98< | 2 | 0.68 | 4.63 |
| Ammonium hydroxide | 25% | 65 | 2 | 0.09 | 0.33 |
| Sodium chloride | 10% | 102 | 2 | 0.14 | 0.34 |
| Sodium carbonate | 10% | 102 | 2 | 1.20 | 4.99 |
Electrical properties
Quartz glass with high dielectric strength and very low electrical conductivity, is in high temperature, high pressureand high frequency, can still maintain high dielectric strength and resistance, in the band hardly dielectric loss, thereforethe quartz glass is an excellent high temperature dielectric insulating material.
| Quartz glass electric energy | ||||
| Property name | Electrical performance index | Species | Transparent quartz glass | Opaque quartz glass |
| Breakdown voltage (1000 volts / mm ) | 溫室 >30 | 溫室 >16 | ||
| 500℃ 11 | 7.6 | |||
| Dielectric constant (10^6) | ε=3.7 | ε=3.5 | ||
| Dielectric loss TG (50cycles / second ) | 0.0003 | 0.001 | ||
| Resistance ( ohm cm ) | 20℃ 10^-18 | 10^-16 | ||
Optical properties of
Quartz glass optical performance has its one's own knack in, it can be through the Far Ultraviolet Spectroscopic, is all ultraviolet permeable material the best, but also through the visible and near infrared spectroscopy. According to the requirements of users, from 185-3500mμband within arbitrary selection of the desired species. As the quartz glasshigh temperature, thermal expansion coefficient is extremely small, chemical thermal stability is good, bubble, stripes,uniformity, birefringence can be comparable with general optical glass, so it is in the work under various bad situationsis of high stability optical system the essential optical materials.
|
Optical quartz glass refractive index |
||
|
Wave length ( nm ) |
Crystal melting Quartz glass |
Synthesis Quartz glass |
|
185.41 193.53 202.54 206.20 213.85 214.45 226.50 232.94 237.83 248.20 250.20 257.62 265.36 274.87 280.35 289.36 298.06 307.59 313.17 328.36 334.15 340.36 346.69 361.17 365.48 398.84 404.65 435.83 486.13 546.07 587.56 656.27 |
1.57464 1.56071 1.54729 1.54269 -- 1.53385 1.52318 1.51834 -- -- 1.50762 1.50397 -- 1.49634 -- -- 1.48859 -- -- 1.48183 -- 1.47877 1.47766 1.47513 -- 1.47028 -- 1.46679 1.46324 1.46021 1.45857 1.45646 |
-- -- 1.54717 1.54266 1.53434 -- 1.52299 -- 1.51473 1.50841 -- 1.50351 1.49994 -- 1.49403 1.49098 1.48837 1.48575 1.48433 -- 1.47976 1.47860 1.47748 1.47503 1.47448 -- 1.46961 1.46669 1.46314 1.46007 1.45847 1.45637 |
|
Note: measurement error：±3×10^-5 |
||
Quartz glass structure, impurity content, OH gene and NO, CO content is the main factor affecting the spectral transmittance, atoms of oxygen combined with malnutrition in0.24 μoffice has absorption peak, containing OH groupsof quartz glass, in2.7 μoffice due to molecular vibrations will produce obvious absorption peak, UV transmittancemainly due to metal impurities caused by atomic absorption spectrometry.
|
Optical quartz glass refractive index |
|||
|
Wavelength ( microns ) |
Index of refraction |
Wavelength ( microns ) |
Index of refraction |
|
0.67 0.68 0.69 0.70 0.80 0.90 1.00 1.10 1.20 2.20 2.30 2.40 2.50 2.60 2.70 2.80 |
1.456066 1.455818 1.455579 1.455347 1.453371 1.451808 1.450473 1.440261 1.448110 1.435111 1.433462 1.431730 1.429911 1.428001 1.425995 1.423891 |
1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 2.10 2.90 3.00 3.10 3.20 3.30 3.40 3.50 |
1.446980 1.445845 1.444687 1.443492 1.442250 1.440954 1.439957 1.438174 1.436680 1.421684 1.41937 1.41694 1.41440 1.41173 1.40893 1.40601 |
The spectral characteristic curves of quartz glass
Fused quartz glass is well infrared transparent materials, but due to the existence of impurities, UV transmittance.Oxyhydrogen melting crystal obtained quartz glass, due to oxygen defects of structure, in0.24 μa peak, while containing OH groups, so the infrared transmission is extremely low. Synthetic raw material gas refining high purity quartz glass is the best ultraviolet permeable material, but in 2.7μwith severe OH absorption peak. Only with the synthetic raw materials through the fused with or without hydrogen flame melting into optical quartz glass, can very well through thefar ultraviolet to near infrared continuous spectrum.
|
Quartz glass optical constants |
||
|
Project / index / variety |
Crystal melting Quartz glass |
Synthesis Quartz glass |
|
Nd(He587.56mμ) Nf(H486.13mμ) Nc(H656.27mμ) |
1.45857 1.46324 1.45646 |
1.4587 1.46314 1.45637 |
|
Coefficient of dispersion V=(Nd-1)/(Nf-Nc) Central dispersion: Nf-Nc |
67.6 0.00678 |
67.7 0.00677 |
