RD 50® Radiation Shielding Glass
Monolithic X-ray protection sight glass with increased lead equivalent
Special Properties
- Increased lead equivalent compared to RD 30®
- High X-ray absorption
- Wide range of thicknesses available
- Large dimensions possible
- More scratch-resistant than acrylic glass
- Non-flammable
- Good transparency
Typical Applications
- X-ray protection glass for medical applications
- Protective window for positron emission tomography (PET)
- Radiation protection in computed tomography (CT)
- Sight-glass for X-ray rooms
- Radiation protection doors and windows in medical radiology rooms
RD 50® offers increased absorption of radiation
RD 50® is a clear, transparent, dense flint glass that SCHOTT produces in Germany. The modified lead-silicate glass allows shielding X-rays and gamma radiation in medical, industrial, and research applications. It has a lead oxide content of > 65 % by weight, which results in a density of at least 5,05 g/cm2 and thus enables compliance with statutory safety regulations even at comparatively low glass thicknesses. RD 50® has a higher lead equivalent than RD 30® and therefore has a higher radiation shielding effect (see table). The X-ray absorption of RD 50® can meet the requirements of the German Institute for Standardization (DIN Germany), European Standardization, and the International Electrotechnical Commission. RD 50® radiation shielding glass's particular composition allows for positron emission tomography (PET) and computer-tomography (CT) applications and their combination. The glass is available in a wide range of standard thicknesses. Often, we can polish it to a custom thickness, too. If you are looking for a radiation shielding glass optimized for mammography applications, please visit our RD 30® website.
To request a quote for sight glass or windows made of original SCHOTT RD 50® high-quality radiation shielding glass, please select a thickness from the table in the specifications or click on the button below.
Please follow the installation cleaning and care instructions for radiation shielding glass.
Specifications
Transmission of RD50®
radiation shielding glass 5 mm thick
Transmission of RD50®
radiation shielding glass, 20 mm thick
Standard Thicknesses
(Please click on a glass thickness to request a quote)Thickness (mm) |
Tolerance |
|---|---|
| 6,0 | ±1,0 |
| 8,0 | ±1,0 |
| 9,5 | ±1,0 |
| 11,0 | ±1,0 |
| 12,75 | ±1,25 |
| 17,5 | ±1,5 |
| 21,5 | ±1,5 |
| Custom thicknesses on request | |
Lead equivalents
| Min. thickness (mm) | 5,00 | 7,00 | 8,50 | 10,0 | 11,5 | 16,0 | 20,0 |
| Tube voltage | Lead equivalent in mm Pb | ||||||
| 76 kV* | 1,5 | 2,1 | 2,6 | 3,0 | 3,4 | -- | -- |
| 80 kV | 1,5 | 2,1 | 2,6 | 3,1 | 3,5 | -- | -- |
| 100 kV | 1,5 | 2,1 | 2,6 | 3,1 | 3,6 | 5,0 | 6,3 |
| 110 kV | 1,5 | 2,1 | 2,5 | 3,0 | 3,5 | 4,9 | 6,1 |
| 150 kV | 1,5 | 2,1 | 2,5 | 3,0 | 3,5 | 4,9 | 6,1 |
| 200 kV | 1,4 | 2,0 | 2,4 | 2,9 | 3,3 | 4,6 | 5,8 |
| 250 kV | 1,4 | 2,0 | 2,4 | 2,8 | 3,3 | 4,7 | 5,9 |
| 300 kV | 1,4 | 2,0 | 2,5 | 2,9 | 3,4 | 4,8 | 6,1 |
| 350 kV* | 1,4 | 2,1 | 2,5 | 3,0 | 3,5 | 4,9 | 6,2 |
| 400 kV | 1,5 | 2,1 | 2,6 | 3,1 | 3,6 | 5,0 | 6,4 |
| 450 kV* | 1,5 | 2,1 | 2,6 | 3,1 | 3,6 | 5,1 | 6,5 |
| 500 kV* | 1,5 | 2,2 | 2,7 | 3,2 | 3,7 | 5,2 | 6,6 |
| 550 kV* | 1,5 | 2,2 | 2,7 | 3,2 | 3,7 | 5,3 | 6,7 |
| 600 kV* | 1,6 | 2,2 | 2,7 | 3,3 | 3,8 | 5,4 | 6,8 |
| 650 kV* | 1,6 | 2,2 | 2,8 | 3,3 | 3,8 | 5,4 | 6,9 |
| 750 kV* | 1,6 | 2,3 | 2,8 | 3,4 | 3,9 | 5,5 | 7,0 |
| 1000 kV* | 1,6 | 2,4 | 2,9 | 3,5 | 4,0 | 5,7 | 7,3 |
| *no tube voltage according to DIN EN 61331-1 | |||||||
Refractive Index
- nD = 1,79
Mechanical Properties
- Density: ≥ 5,05 g/cm3
- Young's modulus E: 56,6 kN/mm2
- Poisson number µ: 0,245
- Torsion modulus G: 22,7 kN/mm2
- Knoop hardness HK 0,1/20: 360
- Stress optical coefficient C
in 1,02 × 10-12 m2/N: 0,78
Thermal Properties
- Mean linear coefficient of thermal expansion:
7,4 × 10-6/K (20 °C ; 300 °C) (static measurement) - Transformation Temperature Tg: 467 °C
- Viscosities and corresponding temperatures:
- Strain point (1014,5 dPa): 444 °C
- Annealing point (1013 dPa): 467 °C
- Softening point (107,6 dPa): 603 °C
- Forming temperature (106 dPa): 673 °C
- Forming temperature (105 dPa): 729 °C
- Forming temperature (104 dPa): 800 °C
- Mean specific heat capacity cp:
0,39 J/(g × K) (20 - 100 °C) - Thermal conductivity: 0,62 W/(m × K) (at 50 °C)
Chemical Properties
- Hydrolytic resistance according to DIN ISO 719:
- Hydrolytic Class HGB 1
- Equivalent of alkali (Na2O) per g of glass grains: 24 μg/g
- Acid resistance according to DIN 12 116:
- no data available
- Alkali resistance according to DIN ISO 695:
- Alkali Class A3
- Surface weight loss after 3h:
510 mg/dm2
Please make sure to observe the installation cleaning and maintenance instructions for radiation shielding glass.
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