2 research outputs found
Thermal conductivity of refractory glass fibres
In the present study, the current international
standards and corresponding apparatus for measuring the
thermal conductivity of refractory glass fibre products have
been reviewed. Refractory glass fibres are normally produced
in the form of low-density needled mats. A major
issue with thermal conductivity measurements of these
materials is lack of reproducibility in the test results due to
transformation of the test material during the test. Also
needled mats are inherently inhomogeneous, and this poses
additional problems. To be able to compare the various
methods of thermal conductivity measurement, a refractory
reference material was designed which is capable of
withstanding maximum test temperatures (1673 K) with
minimum transformation. The thermal conductivity of this
reference material was then measured using various
methods according to the different standards surveyed. In
order to compare different materials, samples have been
acquired from major refractory glass fibre manufacturers
and the results have been compared against the newly
introduced reference material. Materials manufactured by
melt spinning, melt blowing and sol–gel have been studied,
and results compared with literature values