Simultaneous measurements of high-temperature total hemispherical emissivity and thermal conductivity using a steady-state calorimetric technique

2014 ◽  
Vol 26 (1) ◽  
pp. 015003 ◽  
Author(s):  
Tairan Fu ◽  
Peng Tan ◽  
Minghao Duan
Keyword(s):  
Thermal Conductivity ◽  
Steady State ◽  
High Temperature ◽  
Simultaneous Measurements ◽  
Calorimetric Technique ◽  
Total Hemispherical Emissivity

Transient Calorimetric Measurement Method for Total Hemispherical Emissivity

2012 ◽  
Vol 134 (11) ◽  
Author(s):  
Tairan Fu ◽  
Peng Tan
Keyword(s):  
Heat Transfer ◽  
Steady State ◽  
Specific Heat ◽  
Good Choice ◽  
Thin Strip ◽  
Time Interval ◽  
Transient Method ◽  
Steady State Method ◽  
Calorimetric Technique ◽  
Total Hemispherical Emissivity

The transient calorimetric technique was used to measure the total hemispherical emissivity of conductive materials. The emissivity was measured in a small central region of a thin strip heated electrically in a vacuum chamber. The axial heat transfer along the sample and the heat losses from the wires were considered in the transient heat transfer calculations. An appropriate time interval for the hot sample cooling rate is needed to improve the emissivity solution accuracy. Two ways were used to analyze the data, based on the known specific heat and the assumed functions of the emissivity and the specific heat. Comparisons with steady-state data showed that their results are very similar with a maximum difference of only 13% (944 K). Therefore, the transient method based on the function assumption is a good choice for measurements when there are inaccurate or insufficient specific heat data at the desired temperatures. Since ferromagnetic materials have Curie points at higher temperatures, this study also investigated the applicability of the transient calorimetric technique for high temperature emissivity measurements. For higher temperatures above the Curie point, the steady-state method is more accurate than the transient method. These analyses provide a comprehensive understanding of the transient method for measuring the total hemispherical emissivity.

A steady-state high-temperature method for measuring thermal conductivity of refractory materials

2013 ◽  
Vol 84 (5) ◽  
pp. 054902 ◽  
Author(s):  
M. Manzolaro ◽  
S. Corradetti ◽  
A. Andrighetto ◽  
L. Ferrari
Keyword(s):  
Thermal Conductivity ◽  
Steady State ◽  
High Temperature ◽  
Refractory Materials ◽  
Temperature Method

WIELAND-K88

Alloy Digest ◽  
2005 ◽  
Vol 54 (12) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Stress Relaxation ◽  
Copper Alloy ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Relaxation Resistance ◽  
Temperature Performance ◽  
Very High

Abstract Wieland K-88 is a copper alloy with very high electrical and thermal conductivity, good strength, and excellent stress relaxation resistance at elevated temperatures. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CU-738. Producer or source: Wieland Metals Inc.

High‐Temperature Skin Softening Materials Overcoming the Trade‐Off between Thermal Conductivity and Thermal Contact Resistance

Small ◽  
2021 ◽  
pp. 2102128
Author(s):  
Taehun Kim ◽  
Seongkyun Kim ◽  
Eungchul Kim ◽  
Taesung Kim ◽  
Jungwan Cho ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
High Temperature ◽  
Contact Resistance ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Trade Off
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