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The ZF6 and ZF7 series lead glass are high lead content optical glass products designed specifically for the nuclear industry, nuclear power plants, and high-energy radiation environments. As high-end models in the ZF series of radiation resistant glass, ZF6 and ZF7 have become core materials in the fields of nuclear facility observation windows, hot room observation windows, and high-energy radiation protection due to their extremely high lead oxide content and excellent radiation shielding performance.
ZF6 and ZF7 high lead radiation resistant glass have become irreplaceable key protective materials in the nuclear industry due to their extremely high lead content, excellent radiation shielding ability, and stable optical performance. Whether it is the safe operation of nuclear power plants or the s
mooth development of nuclear medicine research, ZF6/ZF7 lead glass has built a solid and reliable "transparent defense line" for operators.
Lead Glass 
Lead Glass
| Parameter project | ZF6 lead glass | ZF7 lead glass |
|---|---|---|
| Density | 4.78 g/cm³ | 5.20 g/cm³ |
| Lead oxide content (PbO) | ≥ 65% | ≥ 71% |
| Lead equivalent | 0.27–0.30 mmPb/mm | 0.32–0.38 mmPb/mm |
| Refractive index | 1.755 | — |
| Transmittance | ≥ 75% (Overlapping usage ≥ 85%) | ≥ 70% (Overlapping usage ≥ 85%) |
| Conventional thickness range | 20 mm – 120 mm | 20 mm – 120 mm |
| Mohs hardness | About 6-8 | About 6-8 |
| Main colors | pale yellow | pale yellow |
1. Ultra high lead content, excellent protective performance
ZF6 has a lead content of 65%, while ZF7 has a higher content of 71%. At the same thickness, its radiation attenuation ability far exceeds that of conventional medical lead glass such as ZF2 and ZF3. The density of ZF7 reaches 5.2 g/cm ³, making it one of the highest protection products in the ZF series, especially suitable for high-energy gamma ray and nuclear radiation environments.
2. Optical grade quality, clear observation field of view
Using high-purity optical glass substrate, after precision polishing treatment, the surface smoothness is high, without obvious bubbles, impurities, and scratches. While ensuring strong shielding performance, provide good visual transparency to meet the remote operation and observation needs of nuclear facilities.
3. Strong radiation resistance and stability
ZF6 and ZF7 lead glass are not easily discolored or yellowed under long-term radiation exposure, and their optical properties are stable and long-lasting. It can be used in combination with K501 and K509 radiation resistant glass to further enhance radiation resistance and service life.
4. Strong customizability
Support customization of various sizes, thicknesses, and irregular specifications (such as circular, curved, etc.) according to customer needs. The conventional maximum board size can reach 2400 mm × 1200 mm, with a thickness coverage of 20 mm to 120 mm, and larger specifications can also be produced as needed.
Nuclear power plant/reactor: main control room observation window, hot room observation window, shielding nuclear grade radiation
Nuclear fuel cycle facilities: High energy radiation protection for reprocessing plants and spent fuel storage facilities
Nuclear Medicine/Isotope Laboratory: Observation Window for Radiopharmaceuticals Preparation and Packaging Hot Room
Industrial high-energy testing: >400 kVp high-energy X-ray and gamma ray testing room
Radiochemistry Laboratory: Shielding for High Activity Radioactive Material Operations
Cobalt-60 irradiation device: irradiation room observation window, shielding cobalt-60 gamma rays
Selection suggestion: For conventional medical CT, DR room and other low energy radiation scenarios, it is recommended to choose ZF2 or ZF3 series; High energy/nuclear level radiation scenarios such as nuclear power plants, nuclear reactors, and nuclear medicine hot rooms must use ZF6 or ZF7 high lead glass.
Lead equivalent testing: Provide a lead equivalent testing report issued by a third-party authoritative organization.
Window frame matching: Stainless steel lead lined window frames can be provided to ensure overall shielding without leakage gaps.
Installation guidance: Provide professional installation technical support to ensure the sealing and shielding effect between glass and walls/window frames.
Transportation packaging: shockproof wooden case+foam lining packaging is used to ensure the safety of long-distance transportation.
