摘要
首先对3种常用的硅粉制备技术进行了介绍;然后将分形混沌理论引入硅粉制备领域,通过对硅粉制备过程中的动态能量进行调控,突破了传统硅粉制备技术中能量输入方式与粉碎机理单一性的局限;通过采用X射线衍射(XRD)法和电子背散射衍射(EBSD)法,研究了硅粉的微观结构与其化学反应活性的关联性,提出了一种化学反应活性快速评价方法。研究结果表明:对撞法和冲旋法这2种硅粉制备技术可降低硅粉的晶粒度,增大晶格应力,增多硅粉的(111)晶面,显著增大硅粉颗粒的比表面积,从而提高硅粉的化学反应活性。在多晶硅/有机硅合成过程中,对撞法和冲旋法制备的硅粉的化学反应活性得到提高,为太阳电池用硅片的低成本化生产提供了优异的硅粉制备技术。
This paper first introduces three commonly used silicon powder preparation techniques.Then the fractal chaos theory is introduced into the field of silicon powder preparation,breaking through the limitations of traditional silicon powder preparation techniques due to the singularity of energy input methods and crushing mechanisms by regulating the dynamic energy during the silicon powder preparation process.By using XRD and EBSD methods,the correlation between the microstructure of silicon powder and its chemical reaction activity parameters is studied,and a rapid evaluation method for chemical reaction activity is proposed.The research results show that the two silicon powder preparation techniques,namely impact rotation method and collision method,can reduce the grain size of silicon powder,increase lattice stress,enhance the(111)crystal plane of silicon powder,and significantly increase the specific surface area of silicon powder particles,thereby improving the chemical reactivity of silicon powder.The silicon powder prepared by the collision method and impact rotation method exhibits enhanced chemical reactivity in the processes of polysilicon and organosilicon synthesis,providing an excellent silicon powder preparation technology for the low-cost production of silicon wafers used in solar cells.
作者
余敏
曹攽
常森
Yu Min;Cao ban;Chang Sen(Zhejiang Institute of Geosciences,Hangzhou 310007,China;Engineering Research Center of non-metallic minerals of Zhejiang Province,Hangzhou 310007,China;Zhejiang Metallurgical Research Institute,Hangzhou 310011,China)
出处
《太阳能》
2025年第10期65-72,共8页
Solar Energy
基金
浙江省公益技术应用研究(分析测试)基金项目(2017C37099)。
关键词
硅粉
多晶硅
有机硅
太阳电池
化学反应活性
晶粒度
晶格应力
分形混沌理论
silicon power
polysilicon
organosilicon
solar cell
chemical reactivity
grain sizei lattice stress
fractal chaos theory
