H. Sasaki et al., TEMPERATURE-DEPENDENCE OF THE VISCOSITY OF MOLTEN SILICON MEASURED BYTHE OSCILLATING CUP METHOD, JPN J A P 1, 34(7A), 1995, pp. 3432-3436
The viscosity of molten silicon was measured using a oscillating cup m
ade of SiC. In the temperature range, from the solidification point of
about 1,415 degrees C to about 1,600 degrees C, the viscosity ranged
from 0.7 to 0.9 mPa . s. The activation energy estimated from the data
was 0.20 eV. An anomalous increase in the viscosity with decreasing t
emperature was observed for temperatures lower than about 1,430 degree
s C. In this temperature range, an anomalous temperature dependence of
the density and surface tension have been observed. Our results thus
indicate that the anomalous behavior of different properties occurs si
multaneously, reflecting a kind of essential variation in the melt.