Heat-Conductivity Studies of Structural Ceramic Materials. Part VI. A Study of the Heat Conductivity of an Al2O3-Based Ceramic

Heat-Conductivity Studies of Structural Ceramic Materials. Part VI. A Study of the Heat... The heat conductivity of an Al2O3-based ceramic (KPF-5-grade refractory material) is studied. Two sets of specimens are tested: intact specimens, prepared from as-received material, and in-service specimens, subjected to high-temperature aging (at 1700°C for 1680 h). Temperature profiles and heat flows measured in the two sets of specimens are compared. Results for effective heat conductivity calculated by an explicit identification method show a standard deviation of about 10°C from experimental values. The use of a descriptive regularization method for data processing makes it possible to decrease the spread of curves by narrowing the domain of possible solutions, which was done by placing constraints (inequalities) on the X and Y-coordinate axes. The effective heat conductivity of the intact Al2O3 material at low temperatures (below 1000 K) is higher than that of the in-service (thermally aged) Al2O3 material, whereas the exact opposite is true at higher temperatures (more than 1200 K). For both materials, the effective heat conductivity is the same at a temperature of about 1100 K at which the curves intersect http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Heat-Conductivity Studies of Structural Ceramic Materials. Part VI. A Study of the Heat Conductivity of an Al2O3-Based Ceramic

Loading next page...
 
/lp/springer_journal/heat-conductivity-studies-of-structural-ceramic-materials-part-vi-a-V5QYpnYiLH
Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2001 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:1012342617186
Publisher site
See Article on Publisher Site

Abstract

The heat conductivity of an Al2O3-based ceramic (KPF-5-grade refractory material) is studied. Two sets of specimens are tested: intact specimens, prepared from as-received material, and in-service specimens, subjected to high-temperature aging (at 1700°C for 1680 h). Temperature profiles and heat flows measured in the two sets of specimens are compared. Results for effective heat conductivity calculated by an explicit identification method show a standard deviation of about 10°C from experimental values. The use of a descriptive regularization method for data processing makes it possible to decrease the spread of curves by narrowing the domain of possible solutions, which was done by placing constraints (inequalities) on the X and Y-coordinate axes. The effective heat conductivity of the intact Al2O3 material at low temperatures (below 1000 K) is higher than that of the in-service (thermally aged) Al2O3 material, whereas the exact opposite is true at higher temperatures (more than 1200 K). For both materials, the effective heat conductivity is the same at a temperature of about 1100 K at which the curves intersect

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Oct 9, 2004

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from Google Scholar, PubMed
Create lists to organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off