毕业设计（论文）-砂浆更换模型的建立及更换工艺的确定精选.docVIP

砂浆更换模型的建立及更换工艺的确定 摘 要 太阳能的应用是解决能源与环境问题的有效途径。在太阳电池的成本中硅片几乎占了60%的成本。因此，在保证光电转换效率的前提下如何降低硅片的加工成本成了降低太阳电池总成本的关键环节。 硅片加工成为硅片表观缺陷、应力破损和机械损伤的最主要工序，对太阳能电池性能有很大影响，其加工效率和加工质量直接关系到整个硅片生产的全局，影响到整个产业链的后续生产。因此研究先进的切割工艺，降低这部分的制造成本、提高硅片的成品率，对于提高太阳能对传统能源的竞争力至关重要，对光伏行业的发展有重要的指导意义。 线切割机以极高的生产效率和出片率广泛应用在硅片加工领域，在线切割过程中起主要切割作用的是砂浆。本文针对公司的MB、NTC线切割机，研究分析了线切割过程中砂浆中的硅粉含量及SiC颗粒的粒度变化对砂浆切割能力和硅片质量的影响，通过建立新的砂浆更换模型，控制砂浆中硅粉的含量，合理的更换砂浆，达到既能使砂浆有切割能力、不会对硅片质量造成影响，又能最大限度的使用有切割能力的砂浆、节约成本的目的。 关键词：太阳能电池片、线切割、砂浆更换模型、硅粉含量 Slurry Replacement Model’s Buiding and the Determineation Of the Replacement Progecess ABSTRACT The application of solar energy is an effective way to solve the Environmental and energy problems. The cost of silicon accounts for almost 60% in overall cost of solar wafers. Therefore, how to reduce the machining cost of silicon wafers in ensuring the premise of photoelectric conversion efficiency has become a key link in total cost of solar wafers. How to decrease apparent deficiencies, stress, damage and mechanical damage of Silicon wafers in the machining process is a main process. The performance and processing efficiency of solar wafers have great impact on the global silicon producing and entire industry follow-up of production chains. Therefore, the advanced cutting technology can reduce the manufacturing cost of this part and improve silicon yield rate, which has an important significance to increase solar energys competitiveness in the development of photovoltaic industry compared to the raditional energy. The wire-saw machine with high rates of productivity and film is widely used in the field of silicon processing. Slurry plays a major role in the cutting process. In this design proposal, with the MB、NTC wire-saw machine，we research and analyze how the silicon powder and SiC particles size in the slurry affect the work process and the quality of silicon wafers .We want to establish a new slurry replacement model through controlling the content of silicon powder in the slurry and