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NIST/NRC-Canada Interlaboratory Comparison of Guarded Hot Plate Measurements: 1993-1997.


pdf icon NIST/NRC-Canada Interlaboratory Comparison of Guarded Hot Plate Measurements: 1993-1997. (773 K)
Zarr, R. R.; Kumaran, M. K.; Lagergren, E. S.

NISTIR 6087; 11 p. December 1997.

Available from:

National Technical Information Service
Order number: PB98-122872

Keywords:

guarded hot plate apparatus; alumina silica; glass fiber; insulation; regression; statistics; steady state; thermal conductivity; thermal resistance; uncertainty

Abstract:

Thermal conductivity measurements from an international interlaboratory study between the United States and Canada are presented for two materials, glass-fiber board and fibrous alumina silica. The measurements were determined using guarded hot plate apparatus at the National Institute of Standards and Technology and at the National Research Council Canada. The nominal bulk densities and thicknesses for the specimens of glass-fiber board and fibrous alumina silica were 160 kg/m3 and 25.1 mm, and 290 kg/m3 and 25.2 mm, respectively. Measurements of thermal conductivity were conducted over a temperature range of 273 K to 340 K. Statistical regression analyses of the data are presented.