Rekov Y. Improvement of micrometallurgical process of growth of silicon rod-substrates for producing polycrystalline silicon

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0414U000343

Thesis Registration Form

0414U000343.pdf

Applicant for

Specialization

  • 05.16.02 - Металургія чорних і кольорових металів та спеціальних сплавів

23-01-2014

Specialized Academic Board

Д 26.232.01

Essay

The micrometallurgical process of growth of silicon rod-substrates by induction floating zone melting method of pedestal is investigated and improved. The scientific tasks devoted to improve the strength of the silicon rod-substrates and prevent the condensed phase formation on their surface are solved. It is shown that the factor appointing the mechanical strength of the rod-substrate is a thermoelastic stress due to the high axial temperature gradient in the zone of silicon transition from plastic to brittle state when the rod is growing. The formation of condensed phases can be prevented by conducting of the process in an argon atmosphere.

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Files

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dis.doc

dis.doc

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