冷坩埚定向凝固太阳能级多晶硅的缺陷控制及组织特征  

Structure Characteristic and Defects Controlling in Cold Crucible Directional Solidification of Multicrystalline Silicon for Solar cells

作　　者：丁宏升[1] 陈瑞润[1] 黄锋[1] 郭景杰[1] 毕维生[1] 傅恒志[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第S1期74-76,共3页Special Casting & Nonferrous Alloys

摘　　要：利用电磁冷坩埚连续熔化和定向凝固太阳能级多晶硅,将电磁铸造与定向凝固的优点相结合,用下抽拉法将其铸成硅棒。在试验过程中出现不熔、原料烧结、熔池熄灭、不完全熔化、熔体飞溅和硅锭断裂等现象,这些现象与熔铸过程密切相关,大多缺陷通过调整工艺和参数可以消除。通过合适的工艺参数配合,可获得表面有起伏,但无裂纹且组织定向的多晶硅锭。The process of cold crucible directional solidification of muliticrytalline silicon for solar cells is studied in this paper, this technique combines the advantages of electromagnetic casting and that of directional solidification. The silicon ingots are cast by withdrawing. There are many defects in the experiments, such as the silicon grains are not melt, sintering of silicon grains, quenching of the melt, incomplete melting, splashing of the melt and break of the new ingot. Those defects are related to t...

关 键 词：太阳能级多晶硅 定向凝固 电磁约束成形 冷坩埚 

分 类 号：TM914.4[电气工程—电力电子与电力传动]