borosilicate sight glass/boiler sight glass/pyrex sight glass
Tempered Glass Borosilicate Glass Plate, Pyrex Borosilicate Glass Plate, Borosilicate Glass 3.3
Borosilicate glass 3.3 is one of transparent colorless glass, through wavelength is between 300 nm to 2500 nm, transmissivity is more than 90%. Coefficient of thermal expansion is 3.3. It can acid proof and alkali , the high temperature resistant is about 450°C. If course handling , the high temperature resistant can reach 550°C or so. Apply to lighting fixture , chemical industry , electron, high temperature equipment and so on.
Borosilicate glass 3.3 has excellent transmission over the visible and NIR wavelengths working from 310nm to 2700nm. The surface quality is not as high as the BK7 versions.
Borosilicate glass 3.3 has excellent chemical and thermal-shock resistance and has a maximum working temperature of 500°C so are excellent for use in high powered light source applications or an excellent choice for cold and hot mirror substrates.
BOROSILICATE GLASS 3.3
Densityρ: | 2.23± 0.02g/cm3 |
Hardness: | >7 |
Tensile strength: | 4.8×107Pa(N/M2) |
Bulk modulus: | 93×103 M pa |
Modulus of rigidity: | 3.1×1010Pa |
Young's modulus: | 63KN/mm3 |
Compressive strength: | 1200kg/ cm2 |
Poisson's ratio: | 0.18 |
Thermal expansion coefficient: | (0-300℃) (3.3±0.1)x10-6K-1 |
Coefficient of thermal conductivity: | 1.2W×(m×k) -1 |
Specific heat capacity: | (20-100℃) 00.82kJx(kgxk) |
Optical performance: |
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1. Light transmittance: | 92% |
2. The refractive index: | Nd: 1.47384 |
3. The wavelength: | 435.8nm=1.481, 479.9nm=1.4772 , 546.1nm=1.4732 |
Softening point: | 810±10 ℃ |
The resistivity1gρ | 250℃ 8.0Ω×cm |
Dielectric coefficientε | 4.7 |
Dielectric strength | 5 ×107V/M |
Dielectric loss factor | tanσ(MC20℃)≤38 ×10-4 |
Resistance to cold and hot shock | 280℃ |
Continuous working temperature | ≤550℃ |
Water resistance: | ISO719 HGB Level 1 |
Acid resistance | ISO195 HGB Level 1 |
Alkali resistance | ISO695 HGB Level 2 |
BOROSILICATE GLASS APPLICATION:
Substrates for dielectric coatings
Lighting applications
Optical filter coating substrates
Wafer substrates
Anodic bonding applications
Biotechnology
Photovoltaics
Environmental technology
Harsh environments
Neutron absorbers
Measurement and sensor technology
Sight glass and optical glass
Own factory and warehouse with advanced imported equipment, most valuable professional talents and strict quality control system,16 years experience. With such resources, we promise to satisfy customer's request with our best capabilities.
Qingdao vatti glass co.,ltd is a professional glass manufacturer and international market supplier, dealing with Tempered Glass, Laminated Glass, Insulating Glass, Borosilicate Glass, Ceramic Heat-resistant Glass,Aluminosilicate Glass,Anti-glare Glass, Anti-reflective glass,Glass Tube, Sight Glass, Solar PV Glass,Quartz glass, furniture glass Series,Art Glass Series, Mirror Series,Clear float Glass,Reflective Glass,Tinted Glass and so on.
What are the advantages of borosilicate glass?
Borosilicate glass 3.3 has a very low thermal expansion coefficient, about one-third that of ordinary glass. This reduces material stresses caused by temperature gradients, thus making it more resistant to breaking. This makes it a popular material for objects like telescope mirrors, where it is essential to have very little deviation in shape. It is also used in the processing of high-level nuclear waste, where the waste is immobilised in the glass through a process known as vitrification (contrast with Synroc).
Borosilicate glass 3.3 begins to soften around 821°C (1510°F); at this temperature, the viscosity of type 7740 Pyrex is 107.6 poise.
Borosilicate glass 3.3 is less dense than ordinary glass.
While more resistant to thermal shock than other types of glass, borosilicate glass can still crack or shatter when subject to rapid or uneven temperature variations. When broken, borosilicate glass tends to crack into large pieces rather than shattering (it will snap rather than splinter).
Optically, borosilicate glasses are crown glasses with low dispersion (Abbe numbers around 65) and relatively low refractive indices (1.511.54 across the visible range)
Why choose Qingdao Vatti Glass?
1. 16 years experiences on glass manufacturing and exporting.
2. Top quality glass with CE,CCC certificate, exporting to more 80 countries in the world.
3. Unique designed strong wooden cases, solving the problems of breakage.
4. Dockside warehouses beside three of China main container seaports, ensuring convenient loading and rapid delivery.
5. Full range of flat glass supply, offering one-stop purchase.
6. Professional sales team, offering personalized and dedicated services.
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