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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/72461

    Title: 生長1600kg多晶矽晶錠過程之熱流場與雜質輸送研究及爐體優化;Furnace optimization of Thermal Flow Field and Impurity Transport during the Growth of 1600 kg Multicrystalline Silicon Ingots
    Authors: 陳柏宇;Chen,Bo-Yu
    Contributors: 機械工程學系
    Keywords: 直接固化法;多晶矽晶錠;G8爐體;暫態數值模擬;Direction Solidification method;Multi-crystalline silicon ingot;G8 furnace;transient numerical simulation
    Date: 2016-08-25
    Issue Date: 2016-10-13 14:57:38 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 直接固化法因成本低且製造過程簡單,是生產多晶矽晶錠最常用的方法。
    ;Directional Solidification method (DSS) is a simple method to produce the ingots and it has low cost. So this method is the most commonly used to growth the mc-si ingots.
    In recent years, DSS method can produce the large size mc-si ingots. Therefore, it is necessary to optimize the furnace structure to improve the mc-si ingots quality.
    In this study, we used FVM method transient numerical simulation to investigate the distribution of the thermal flow field, interface shape, oxygen and carbon impurities distribution in the melt. The experimental data such as G6 and G8 furnace size, material, heater power consumer and insulation height are provided by company.
    In the G6 furnace optimization, I removed a half side graphite layer and replaced as an insulation block. It can decrease the interface shape concave near the crucible region. The interface shape will be more flat. Add the deflector to guide the argon gas flow in the furnace can increase the velocity of flow near the free surface. It can significantly reduce the concentration of oxygen and carbon. Enlarge the volume of supports and change the distance between supports and the center point of the furnace can increases the axial temperature gradient and the ingot solidify time will be reduce, it can also reduce concentration of carbon. Combine these several designs and add the insulation block to make the furnace can get these several advantages and decrease the heater power consumer. The ingot quality can be increase.
    Compare G6 and G8 model, we can find G8 furnace interface shape is more flat,
    concentration of Oxygen and carbon are little difference. It means G8 furnace will be a better superiority in the future.
    Add the insulation block in the G8 furnace can increases the axial temperature gradient. The interface shape become little convex, it is favorable crystal growth.
    Further can reduce the power consumer of the heater, achieve the energy saving effect.
    Appears in Collections:[機械工程研究所] 博碩士論文

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