In recent years, radiation therapy has commonly used. Radioactive medical equipment such as Cobalt 60 treatment machines and linear accelerators, have been used in hospitals.

 

In order to achieve complete and reliable protection conditions, the key parts of the equipment and the patients’ organs that do not need to irradiate must be used with various switch shields that is small size, easy processing, and cheap, such as radioactive source storage tank, protection Plate , etc.

 

Tungsten heavy alloy shielding is now become the first choice for the manufacture of medical radiation shielding for its high density, high radiation shielding and environmental friendly.

 

 

The same medical nuclear equipment and radiation equipment have different protective materials and performance. Production of mercury from raw materials for the performance of equipment: the proportion is 13.5 grams / cubic centimeter, the mechanical properties is flow, not easy to save and shape, application is not wide and toxic; lead density is 11.34 g / cubic centimeter, with half price layer thickness of 12.5-15 wide beam r-ray, low mechanical strength, easy to produce invisible pores, reducing the protective performance, but the rigidity is not good; uranium alloy density is 18.7, with half-price thickness of 0.66 wide beam r-ray, not suitable for mass production, Lack of resources, price more expensive; tungsten heavy alloy is 17-18.5g / cubic centimeter, with half price layer thickness 0.76-0.81 wide beam r-ray, high strength and toughness, rich in resources, and suitable for mass production.

 

It will have high and even density, no pores, and good protective performance if using powder metallurgy isostatic pressing process. It’s also easy to cut, and rigid. In contrast, the tungsten alloy shielding performance advantages are more prominent, for its half-price layer thickness is smaller than the lead, and bigger than the uranium alloy, thus its shielding effect is better than lead, slightly worse than uranium, but uranium alloy is expensive, which is not suitable for large use. Tungsten heavy alloy as been widely used in medical equipment for its good protection performance and rich resources.