ABSTRACT
This paper describes the design and construction of a guarded hot-plate apparatus for the measurement of insulations and refractories in the temperature range 100°C to 850°C having thermal conductivities of up to 0.5 W/m.K and thermal resistances in the range 0.05 to 3.2 m2 K/W. Information is given on measurements carried out to assess the performance and uncertainty of the apparatus using calcium silicate and microporous insulation. Details are also given of an international intercomparison on a low density calcium silicate carried out as part of a BCR programme for the European Community.
