Beryllium X Ray Absorption Window
Overview
Beryllium X-ray Absorption Window is an ultra-thin window component made of high-purity beryllium, which can reduce radiation attenuation while ensuring structural stability. It is widely used in high-end equipment such as medical X-ray imaging, industrial CT, and space exploration instruments. As an isolation window for a radiation incident, it not only isolates external environmental interference but also ensures detection accuracy and signal quality, making it a key core component in the field of high-end radiation detection.
Beryllium Material Characteristics
High transparency to rays
Beryllium has small atoms, low density, high transmittance to X-rays and gamma rays of most wavelengths, and almost no radiation absorption. This makes it an ideal material for X-ray output windows.
good mechanical properties
It has high modulus and isotropic properties, uniform mechanical properties, and a density of only 1.85 g/cm³. However, it has an extremely high strength-to-weight ratio and can withstand high stress without being easily deformed or broken.
Excellent thermal performance
With a thermal expansion coefficient of only 11.3 × 10⁻⁶/K, it is not easily deformed when temperature changes, ensuring the structural integrity of the window. Moreover, the thermal conductivity is as high as 250 W/m·K, which enables the rapid dissipation of heat and ensures stability at high temperatures, making it suitable for extreme thermal environments.
Long service life
The surface can be coated and has good chemical resistance and vacuum sealing performance to extend its service life. It is not easy to oxidise at room temperature, and it is resistant to some corrosive gases. The window transparency and structural stability do not easily decay during long-term use.
X Ray Windows Dimension
| Material | Beryllium |
|
Diameter |
10-90 mm |
| Thickness | 0.02-2mm |
| X-ray Transmittance |
>90% |
| Purity |
98.5%-99.5% Be |
| Melting Point |
1285°C |
| MOQ | 10PCS |
| Delivery Time | 25-30DAYS |
| Certification | ISO 9001 |


Beryllium X Ray Window Application
- X-ray/γ-ray detection equipment: In medical X-ray imaging systems, industrial CT detectors, and nuclear radiation monitors, beryllium window X-ray tubes serve as radiation entry windows, reducing beam attenuation to enhance detection sensitivity and imaging clarity.
- Synchrotron radiation and particle physics apparatus: Particularly in large-scale scientific equipment such as synchrotron radiation sources and particle accelerators, serving as beamline windows to isolate vacuum environments from the atmosphere while ensuring efficient transmission of high-energy radiation.
- Aerospace sector: Beryllium X-ray absorption windows are ideally suited for radiation detection instruments aboard spacecraft (e.g., space X-ray telescopes). Their low density and high mechanical properties enable weight reduction while withstanding extreme space environments (temperature variations, vibrations).
- Nuclear Industry and Radiation Monitoring: Serving as window components in nuclear reactor radiation monitors and radioactive material detectors, they withstand radiation exposure while maintaining long-term stability in radiation transmission, ensuring accurate monitoring data.
- High-End Spectrometers: In analytical instruments like X-ray fluorescence spectrometers and photoelectron spectrometers, beryllium X-ray tubes function as isolation windows between samples and detection components. This minimises spectral signal loss, thereby enhancing analytical precision.
Process
① High-purity beryllium powder is selected and processed into beryllium ingots through hot pressing and sintering to remove porosity and impurities from the powder, ensuring high density of the billet.
② The beryllium ingots undergo forging or rolling pretreatment to improve the internal grain structure and reduce brittleness during subsequent processing.
③ A combination of mechanical grinding and chemical polishing is used to gradually thin the beryllium billet to the target thickness.
④ According to window size requirements, the shape is trimmed by laser cutting or electrical discharge machining to ensure burr-free and micro-crack-free edges.
⑤ Surface passivation treatment (such as oxide film coating) can be performed according to customer requirements to improve chemical stability and corrosion resistance.
⑥ After production, X-ray transmittance testing, surface roughness inspection, and mechanical strength sampling are conducted to ensure product quality.
Compared To Other Materials
Beryllium leads the way in terms of density, radiation penetration, and ultra-thin processability, and its mechanical strength meets the needs of precision instruments.
|
Performance indicators |
Beryllium(Be) |
Aluminium(Al) |
Titanium(Ti) |
|---|---|---|---|
| Density(g/cm³) |
1.85(minimum) |
2.70 | 4.51 |
|
X-ray absorption coefficient(cm⁻¹,10keV) |
0.21(minimum) |
1.72 | 3.45 |
|
Tensile strength(MPa) |
400–600 | 200–300 | 600–800 |
|
Modulus of elasticity(GPa) |
287(Extremely high) |
70 | 110 |
|
Minimum machinable thickness(μm) |
20–50 | 50–100 | 80–150 |
|
Chemical stability(at room temperature) |
Fairly good (resistant to oxidation) |
Ordinary (prone to oxidation) |
Fairly good (passivation film) |
|
Applicable radiation types |
X-ray/gamma radiation optimal |
Low-energy X-rays |
Medium-to-high-energy rays |
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Why choose us
24-Hour Response Service
Upon receiving customer inquiries, we promptly and accurately ascertain the product they require, ensuring there are no issues related to time differences.
01
High-quality Customised Services
Micron-level thickness control and high-precision cutting, suitable for X-ray tubes or synchrotron radiation equipment. Offering rapid prototyping, reducing delivery cycles to 3-5 weeks.
02
Strong International Compliance
Proficient in handling export controls and providing safety handling guidelines to alleviate customer concerns regarding beryllium toxicity. For European and American markets, pre-emptively prepare RoHS certification and third-party test reports.
03
Perfect Product System
We have a technical team composed of experts who are proficient in the knowledge of protective materials, and we also have advanced production and testing equipment, such as cutting machines, mechanical lathes, surface treatment equipment, radiation dose detectors, etc.
04
Efficient After-sales Service
If customers encounter any quality issues after receiving the product, or if any items are missing during transit, we will promptly reach out to them and offer a satisfactory resolution. Our team initiates a thorough investigation to identify the root cause and prevent future occurrences.
05
Case

Beryllium Window, Beryllium X Ray Absorption Window To Switzerland
Recently, FANMETAL has successfully dispatched a batch of high-precision beryllium window products to a Swiss precision instrument manufacturer. These products meet the client's core application requirements for high-end optical inspection equipment through their exceptional material properties, micron-level machining precision, and stability under extreme operating conditions. Upon receiving the order, our company established a dedicated technical team to oversee the entire process from requirements analysis and solution design through to production and delivery. This ensured every item complied with both the EU REACH regulation and Swiss SGS testing standards. Moving forward, we shall consolidate our capabilities, continuously advance our technologies, and expand our presence in overseas markets.
Product qualification

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