Processing technology for boron carbide neutron absorber

Abstract

The invention relates to a process for preparing a neutron absorber for absorbing stray neutrons, and in particular relates to a processing technology for a boron carbide neutron absorber which is wide in raw material sources, low in processing cost and simple in process and can be applied in a collimator for effectively absorbing the stray neutrons. The processing technology comprises the following steps: 1), selecting raw materials; 2) selecting moulds; 3) stirring the raw materials; 4) pressurizing and mold-filling; 5) curing and molding; 6) demolding and molding. The boron carbide neutron absorber has easily-available raw materials, is simple in processing steps and low in cost; cold press molding is generally adopted, and the difficulty in the molding process is avoided; the molding or curing time can be greatly shortened on the premise of hot press, the curing speed is increased, and the yield is improved; moreover, according to the boron carbide neutron absorber prepared by processing, the good neutron absorption can be realized, and therefore, the processing technology for boron carbide neutron absorber is suitable for industrial development and can bring long-term economic benefit.

Description

technical field [0001] The invention relates to a process for preparing a neutron absorber for absorbing stray neutrons, in particular to a process for producing a neutron absorber with wide source of raw materials, low processing cost, simple process, and the finished product is used in a collimator to effectively absorb stray neutrons A boron carbide neutron absorber processing technology. Background technique [0002] Both neutrons and X-rays are powerful means for human beings to explore the microstructure of matter. Neutrons are uncharged, have magnetic moments, strong penetration, can distinguish light elements, isotopes and neighboring elements, and have non-destructive characteristics to samples Therefore, neutrons can not only explore the static microstructure of matter, but also study its dynamic mechanism. At present, neutron scattering technology plays an irreplaceable role in the research fields of biology, life, and medicine. In the neutron spectrometer, the n...

AI Technical Summary

Problems solved by technology

[0004] In the common preparation method of neutron absorber, the boron carbide powder mixed colloid cold-pressed forming plate contains more epoxy colloids, and the composition contains more hydrogen and oxygen elements, which directly cause stray scattering; boron carbide powder The painting method also needs to introduce epoxy colloid, the process is more cumbersome, and the processing thickness is limited, and it is prone to failure due to irradiation; the processing of aluminum-based boron carbide composite materials and boron carbide ceramic materials is relatively difficult, and the welding ability It needs to be verified. At the same time, the content of doped boron carbide is small, and the thickness requirement is also limited. At this stage, the price of this type of material is relatively expensive, and it generally needs to be imported from abroad. A neutron absorber that can effectively absorb stray neutrons inside the collimator with low processing difficulty