A Study of Heat Conduction in Structural Ceramic Materials. Part V. Thermal Conductivity of Ceramics Based on MgO

A Study of Heat Conduction in Structural Ceramic Materials. Part V. Thermal Conductivity of... The results of an experimental study are presented and the effectiveness of the earlier described methods is analyzed. The thermal conductivity of one and the same specimen is studied in a gas-dynamic bench and in an optical furnace in order to estimate the accuracy of the determination of systematic errors of the methods. The effect of various heat loads is determined. A comparison of the data shows that the algorithm of descriptive regularization makes it possible to reduce the effect of systematic errors on the thermal conductivity of a MgO material from 40 to 7% at the cold end and from 7 to 3% at the hot end. The residual scattering of individual curves does not exceed the range of the instrumental error of measurement, and the standard deviations reflect its value. The random nature of the residual scattering proves the earlier drawn conclusion that the effective thermal conductivity is independent of the density of the heat flow measured within 482 – 691 kW/m2 accurate to 15%. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

A Study of Heat Conduction in Structural Ceramic Materials. Part V. Thermal Conductivity of Ceramics Based on MgO

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2000 by Plenum Publishing Corporation
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1023/A:1011378622159
Publisher site
See Article on Publisher Site

Abstract

The results of an experimental study are presented and the effectiveness of the earlier described methods is analyzed. The thermal conductivity of one and the same specimen is studied in a gas-dynamic bench and in an optical furnace in order to estimate the accuracy of the determination of systematic errors of the methods. The effect of various heat loads is determined. A comparison of the data shows that the algorithm of descriptive regularization makes it possible to reduce the effect of systematic errors on the thermal conductivity of a MgO material from 40 to 7% at the cold end and from 7 to 3% at the hot end. The residual scattering of individual curves does not exceed the range of the instrumental error of measurement, and the standard deviations reflect its value. The random nature of the residual scattering proves the earlier drawn conclusion that the effective thermal conductivity is independent of the density of the heat flow measured within 482 – 691 kW/m2 accurate to 15%.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Oct 7, 2004

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