Preparation method of UB2 ceramic body

The invention belongs to the technical field of preparation of boride ceramic materials, and particularly relates to a preparation method of a UB2 ceramic body. The preparation method comprises the steps of 1, mixing metal uranium and boron by adopting an induction melting or electric arc melting method, putting the mixture into a crucible, heating or carrying out arc-starting melting to uniformly react, and controlling the uranium-boron reaction rate to prepare a uranium diboride cast ingot; 2, in a glove box, crushing the cast ingot by adopting a crushing tool made of a metal uranium material, then placing the cast ingot in a ball mill, and preparing uranium diboride powder through ball milling; 3, putting the powder into a graphite mold, wrapping the mold containing the powder with a disposable plastic film, and then transferring the mold into a hot-pressing sintering furnace; 4, preparing a ceramic body by adopting a hot pressing sintering process; and 5, conducting surface and periphery machining through