The Experimental Study On Polycrystalline Solar Wafer By Hybrid Electrochemical Grinding Multi-Wire Saw

With the development of science and technology, special attention to energy shortage problems are paid all around the world. Crystalline silicon solar-cell is a device converting solar energy directly into electrical energy, and provide humanity with a new way to obtain inexhaustible, non-polluting energy sources. A new technology of hybrid electrochemical grinding multi-wire saw is put forward for the purpose of solar polysilicon hard cutting in this paper. Hybrid electrochemical grinding multi-wire saw which is based on the conventional multi-wire cutting of silicon with additional electric field. By using the method the composite effect of electrolysis and mechanical grinding on silicon ingots is achieved. contents of this paper are as follows:(1)According to the forming reason and characteristic of the solar grade polycrystalline silicon carbide, the effect of hybrid electrochemical grinding multi-wire saw is theoretically analyzed.(2)Select the multi wire cutting machine used in experimental and do compatibility verification tests on it. Additional tests to confirm the electric field does not have an adverse effect on operation of the machine.(3)The platform for the experiment of hybrid electrochemical grinding multi-wire saw is established, mainly including the design and functional debugging of the electrolytic grinding power supply, selection of test objects and the methods of using test equipments.(4)The results of the experiments considering the four respects of the slicing metrics, cutting line breaking force, mortar quality and the silicon surface morphology are analyzed by designing and accomplishing overall test plan, then come to the conclusion.