Sample

(d0.5) (nm)

s (S∙m−1)

K1 (27% PMMA/73% pumice)

1489

2.76 × 10−4

1.24

K2 (52% PMMA/48% pumice)

1105

5.17 × 10−4

1.48

K3 (78% PMMA/22% pumice)

894

4.26 × 10−3

1.55

PMMA

756

4.2 × 10−2

1.42

pumice

634

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