Improvement in refinement of metallurgical-grade silicon by calcium addition in fractional melting process

Jaewoo Lee, Changbum Lee, Hee Eun Song, Bo Yun Jang, Wooyoung Yoon

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A new method was developed in this study to remove the liquid from a solid/liquid mixture in an induction heating applied system under the influence of centrifugal force. To segregate impurities and improve the refining ratio, calcium was added to the metallurgical-grade silicon. The behavior of impurities and the refining ratio were studied by scanning electron microscopy, electron probe microanalysis, and inductively coupled plasma mass spectroscopy. The impurities in Si were structurally arranged together and formed networks, which facilitated their removal during fractional melting. The refining ratio improved after the addition of Ca. Despite their high segregation coefficients, the concentrations of boron and phosphorus also reduced.

Original languageEnglish
Pages (from-to)52-56
Number of pages5
JournalNanoscience and Nanotechnology Letters
Volume8
Issue number1
DOIs
Publication statusPublished - 2016 Jan

Bibliographical note

Funding Information:
Acknowledgment: It was supported by a Korea University Grant. This work was supported by the International Collaborative Energy Technology R&D Program of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry and Energy, Republic of Korea. (No. 20148520120040). This work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (B6-2426).

Publisher Copyright:
Copyright © 2016 American Scientific Publishers.

Keywords

  • Alloys
  • Fractional Melting
  • MG Silicon
  • Purification
  • Solar Cells

ASJC Scopus subject areas

  • General Materials Science

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