| 摘要 |
<P>PROBLEM TO BE SOLVED: To fracture polycrystalline silicon to lumps of desired sizes, and to reduce loss by suppressing production of fine powder in fracturing. <P>SOLUTION: The fracturing apparatus 1 for fracturing polycrystalline silicon by sandwiching the lump-like polycrystalline silicon between a pair of rolls 3 rotated in a counter direction each other around parallel axes. A plurality of fracturing teeth 5 are projectingly provided outwardly in the radius direction on outer peripheral surfaces of the rolls 3, end faces 15 of the fracturing teeth 5 are spherically formed, and side faces 16 of the fracturing teeth 5 are formed in conical face or columnar faces. <P>COPYRIGHT: (C)2012,JPO&INPIT |
