Table 1: Acceptable contents of impurity in SoG-Si ( ) and their equilibrium segregation coefficients (k).

ElementFeAlCuTiCaCOPB

Acceptable content, (ppmw) [3]<10.005–0.05<1<20.5–110–200.02–20.1–10
Acceptable content, (ppmw) [4]<0.007<0.06< <3<4<0.10.1–0.3
Segregation coefficient, k 0.034–0.3 [3]0.2–1.25 [3]0.350.72–0.8