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Feasibility of measuring thermal diffusivity of liquid slags.

Monaghan, B (2000) Feasibility of measuring thermal diffusivity of liquid slags. NPL Report. CMMT(A)219

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A study was carried out to assess the feasibility of measuring the thennal diffilsivity of liquid slag using a laser flash apparatus (LFA). Measurements are presented for two slag types; a measurement practice is detailed; measurement issues are discussed and recommendations to develop the slag thennal diffilsivity measurement technique further are given. Measurements of an "effective" thennal diffilsivity of slags was demonstrated but it is not clear how the radiation and conduction components of the heat transfer could be separated. As such, a study of how radiation effects the thennal diffilsivity measurement has been recommended. Further, it was also found that for thennal diffilsivity measurements using the LF A to be improved data issues with respect to a slags optical properties, density and heat capacity have to be addressed. The slag types measured were one mould flux and one silica rich, lime-alumino-silicate, both of which had effective thennal diffilsivities of the order 0.005 x 10-4 m2s-1 at temperatures over 1000°C.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMMT(A)219
Subjects: Advanced Materials
Advanced Materials > Thermodynamics
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/1260

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