Yellow tungsten oxide is applied as a cement-based absorbing material because it has certain shielding properties against gamma rays. Well, what is the shielding performance of yellow tungsten oxide against gamma rays? Some experts used tungsten oxide powder as a fine aggregate to prepare a sample of φ10.5cm x 6cm cylindrical cement-based materials, and tested the shielding performance of the sample against gamma rays through an experimental system composed of a PTW UNDOS standard meter and ~ (60) Co, ~ (137) Cs sources.

Tungsten carbide cutter has the properties of high hardness, high strength, high toughness and high heat resistance (thermal stability), so it is suitable for applying to mask machine to produce cup-type masks, non-woven flat masks, and N95 masks, etc.

Tungsten carbide cutter is specially designed with an upper cutter and a lower cutter for applying to mask making machine. According to the experts, the quality of tungsten carbide upper and lower cutters is affected by many factors. Wherein, the change of various process parameters during the sintering process has a great impact on the quality of the cutter. And the performance of cutter is determined by the materials such as the binder and the base material. Besides, the cleanliness of the particle surface and particle size also affect cutter’s performance.

Tungsten carbide scraper is an important part of mask machine to fabricate surgical masks, N95 masks and other protective masks. Such a high-precision scraper can effectively clean the scraps generated by the mask machine during cutting process without polluting the environment.