Table 6.

RSM regression coefficients for the quadratic response of the thermal conductivity λ.

Coefficient	β0	β1	β2	β12	β11	β22
Value for $\lambda$: (N7000-TNGNP):	+0.2073	+0.0270	+0.0331	+0.0022	−1.7143 × 10−4	+0.0019
Value for $\lambda$ (TNIMH4-TNIGNP):	+0.2021	+0.0231	+0.0591	−0.0023	−9.0714 × 10−4	−1.4286 × 10−4