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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. In many cases, 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.

 

Request for Quotation

 

Please follow the installation cleaning and care instructions for radiation shielding glass.

 

Specifications


Transmission of RD50®
radiation shielding glass
5 mm thick


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Transmission of RD50®
radiation shielding glass, 20 mm thick


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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 x 10-12 m2/N: 0,78

Thermal Properties

  • Mean linear coefficient of thermal expansion:
    7,4 x 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 x K) (20 - 100 °C)
  • Thermal conductivity: 0,62 W/(m x 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.

All given details and specifications are mean reference values and are not guaranteed. Also, please consider the "Notes on specifications".

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