Representative thermal conductivities of hydrate-containing sediments. Many pure metals have a peak thermal conductivity between 2 K and 10 K. Various material databases report thermal conductivity at room temperature (23°C), these values may not be representative of the conductivity at performance temperatures. In castable refractories, with cementitious bonds, thermal conductivity is also affected by the hydrated calcium aluminate cement. ; 2 shows the temperature dependence of the thermal conductivity of the fully dense samples after aging for dif-ferent times at 1200 and 1400 C. The thermal conductivity particularly that measured at low temperatures, increases with aging time at 1200 C, while the measured high-tem-perature conductivity is practically unchanged (Fig. } Younglove, B. document.write('