A new approach is discussed for the generation of high purity silicon from silica fume (SF), which is a waste by-product from the manufacture of metallurgical grade silicon. Process steps were developed and optimized including purification of SF, reduction by magnesium, and post-reduction leaching. Reduction was carried out successfully with initial HCl leached SF in a sealed chamber with varying Mg/SF ratios, temperature and time. These variables affected the production of silicon from SF. Suitable reduction conditions were found to be within the temperature range 750-850C and at approximately 2:1 ratio of Mg/SF. Reduction products were treated using a three-stage acid leaching. XRD, QXRD and ICP analyses of the final silicon powder product indicated that silicon with low impurity levels (low boron content) can be produced. Therefore, silicon produced by magnesiothermic reduction can be an attractive source for the production of solar grade silicon.

Thesis (Ed. D.)--University of Missouri-Columbia, 2007. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on November 27, 2007) Vita. Includes bibliographical references.

Thesis (Ph.D.)--University of Tulsa, 1990. / Bibliography: leaves 79-86.

Research paper (M.A.) -- Cardinal Stritch College -- Milwaukee, 1971. / A research paper submitted in partial fulfillment of the requirements for the degree of Master of Arts in Education (Reading Specialist). Includes bibliographical references (p.44-48).

Thesis (Ph. D.)--University of Oregon, 2008. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 82-91). Also available online in Scholars' Bank; and in ProQuest, free to University of Oregon users.

Research paper (M.A.) -- Cardinal Stritch College -- Milwaukee, 1971. / A research paper submitted in partial fulfillment of the requirements for the degree of Master of Arts in Education (Reading Specialist). Includes bibliographical references (p. 79-82).

Research paper (M.A.) -- Cardinal Stritch College -- Milwaukee, 1970. / A research paper submitted in partial fulfillment of the requirements for the degree of Master of Arts in Education (Reading Specialist). Includes bibliographical references (p. 28-30).

Research paper (M.A.) -- Cardinal Stritch College -- Milwaukee, 1971. / A research paper submitted in partial fulfillment of the requirements for the degree of Master of Arts in Education (Reading Specialist). Includes bibliographical references (p. 70-73).

Research paper (M.A.) -- Cardinal Stritch College -- Milwaukee, 1971. / A research paper submitted in partial fulfillment of the requirements for the degree of Master of Arts in Education (Reading Specialist). Includes bibliographical references (p. 36-38).

Research paper (M.A.) -- Cardinal Stritch College -- Milwaukee, 1971. / A research paper submitted in partial fulfillment of the requirements for the degree of Master of Arts in Education (Reading Specialist). Includes bibliographical references (p. 54-57).