Fused silica thermal conductivity dispersion at high temperature

摘要

A continuous CO2 laser is focused to locally anneal small fused silica spots. A noncontact radiometry diagnostic enables us to follow surface temperature variation that occurs from site to site. A "steady state" dispersion of surface temperature is observed across our sample. We show that nonhomogeneous silica thermal conductivity, above 1000 K is responsible for this temperature dispersion. (C) 2004 American Institute of Phyiscs.