Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten funnel shielding provides excellent density with small capacity. At the same weights high density alloy can provide the same energy absorption as lead using 1/3 less material.

During design of tungsten funnel shielding, tungsten funnel shielding is calculated according to requirements of shield to abate the multiple shielding materials' thickness.



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Tungsten alloy collimator shielding is a device that narrows a beam of particles or waves. It belongs to input and output element of optical fiber communicaiton devices. It can be adopted as linear accelerator and cyclotron in medical treatment.

Tungsten alloy collimator shielding has a simple structure, through which the fiber radiate light can be converted into parallel light (gaussian beam). So its main fuction is to efficiently maximize the light coupling into the devic.


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Tungsten metal is a grayish-white lustrous metal that is often brittle and hard to work. Of all metals in pure form, tungsten has highest melting point of all elements except carbon - vary between 3387°C and 3422°C. It also has good thermal and electrical conductivity. Its electrical conductivity at 0°C is about 28% of that of silver which itself has the highest conductivity of all metals. In addition, it has low vapor pressure at high temperatures.

Such properties make tungsten metal a high performance material in high temperature products and processes. Tungsten metal powder is used as a filler material in plastic composites, which are used as a nontoxic substitute for lead in bullets, shot, and radiation shields.



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As the continuously developing medical technology, the medical radiations generated in medical process have become more and more, which causes problems to medical work. These radiations including X-rays, gamma rays, α rays, β rays, etc.

In order to protect the safety of patients and health care workers, researchers found that there is relationship between radio protective capability and material density. The greater the density, the better the shielding performance. Since the density of tungsten alloy is very high, the shielding performance is excellent.

Tungsten alloy material is a class of alloy including tungsten as a substrate (W content of 85-99%), and adding a Ni, Cu, Co, Mo, Cr and other elements. According to the composition characteristics and application, it is divided into W-Ni-Fe, W-Ni-Cu, W-Co, W-WC-Cu, W-Ag and other major series, and the density is up to 16 .5-19.0g/cm3, which is world known as heavy alloy. Tungsten alloy has strong capability in absorbing radiations, which is 30~40% higher than lead.

Application series of tungsten alloy radiation shielding in medical:
1 .Tungsten alloy Multi-leaf Collimator(MLC)
Thickness: 2.0-3.8mm; plate flatness: 0.05mm;
2 .Tungsten alloy collimator;
3. Tungsten alloy  protection cans - used for medical radiation shielding;
4. Tungsten alloy needle shielding - shielding for medical radioactive liquid;
5. Tungsten alloy memory –cans, boxes or other containers for storing radioactive material.
6. Collimators - for medical linear accelerator and cyclotron;
7. Tungsten alloy containers - for ray shielding on 60Co therapy machine;
8. γ camera tungsten alloy collimator.

Application series of tungsten alloy radiation shielding in nuclear technology:
1. Tungsten alloy collimator for detecting container system;
2. 60Co and tungsten alloy containers of other radiation shielding;
3. Tungsten alloy shielding for γ-ray collimator in geological survey;
4. Tungsten alloy collimator for pipeline inspection ray shielding;
5. Tungsten alloy collimator for industrial inspection of γ-ray shielding

The application of tungsten alloy radiation shielding parts:
• Radioactive source containers
• Gamma radiation shielding
• Shielding Block
• X-ray collimator
• tungsten alloy PET shielding pieces
• Shielding in cancer therapy equipments



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