... G T is the thermal conductance from the element to the environment, t T is the thermal time constant of the element, t E is the electrical time constant of the element, ... element, R G is the electrical resistance across the element, h is the emissivity of the element for the radiation being detected, and A is the sensitive area of the element.It is ... chemically and electrically, because of their low Curie temperatures. Furthermore,their dielectric loss is rather high, so that the FD figures are not so favorable. Lithium tantalate, on the otherhand,...