Method for sintering neodymium iron boron magnetic tile and spark plasma sintering device thereof

The invention provides a method for sintering a neodymium iron boron magnetic tile. The method comprises the following steps of 1, selecting a square neodymium iron boron magnet blank prepared by a conventional method; 2, cutting the square neodymium iron boron magnet blank into block-shaped thin sheets; 3, placing the block-shaped thin sheet neodymium iron boron magnet in an arc graphite box base at the bottom of a sintering furnace in a radial distribution mode; and 4, starting a spark plasma sintering device, and carrying out sintering, heat preservation and cooling. The spark plasma sintering device used for the method for sintering the neodymium iron boron magnetic tile comprises a hearth, a dual-layer liquid cooling device, an atmosphere control system and a heat preservation system, wherein the dual-layer liquid cooling device, the atmosphere control system and the heat preservation system are respectively and fixedly connected with the hearth, the dual-layer liquid cooling device comprises a slow-acti