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Power Consumption of Skull Melting, Part I: Analytical Aspects and Experiments
Author(s) -
Gross C.,
Assmus W.,
Muiznieks A.,
Raming G.,
Mühlbauer A.,
Stenzel C.
Publication year - 1999
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/(sici)1521-4079(199903)34:3<319::aid-crat319>3.0.co;2-m
Subject(s) - crucible (geodemography) , radius , materials science , skull , electromagnetic coil , thermal conductivity , cubic zirconia , mechanics , mineralogy , geology , composite material , physics , chemistry , ceramic , computer science , paleontology , computational chemistry , computer security , quantum mechanics
An analytical model for a Skull melting set‐up is presented, which describes the power absorption in the melt and the losses in the inductor coil and the cold crucible. A strong dependence of the relative size of these quantities on the applied frequency has been found. Above a characteristic frequency, where the skin depth equals about one half of the melt radius, only a small percentage of the overall power (typically 10% for oxide melts) is lost in the copper coil and the crucible. Below this frequency, the relative part of these losses increases considerably and can prevent a successful Skull melting experiment. Analytical results are in good agreement with experimental (calorimetric) measurements of the power consumption in a typical Skull run (cubic stabilized zirconia), and with corresponding numerical simulations of the Skull process. The thermal conductivity of the Skull crust was estimated from experimental data.