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

High-pressure technique is an effective route to synthesize thermoelectric materials and tune transport properties simultaneously. In this work, S-doped copper–selenium compounds [Formula: see text], [Formula: see text] were successfully synthesized by high-pressure and high-temperature (HPHT) technology in just 30 min. [Formula: see text] samples show layered morphology composed of abundant pores and lattice defects. The appropriate S introduction ([Formula: see text] and 0.03) can effectively enhance Seebeck coefficient and reduce the thermal conductivity of [Formula: see text]. Compared with the pure [Formula: see text] sample, [Formula: see text] exhibits a 30% lower thermal conductivity, but the decline of power factor by the distinctly increased electrical resistivity at high temperature results in a smaller zT at temperature [Formula: see text] K. The variations of thermoelectric properties are resulted from the competitive effects between S-doping and actual composition change (Cu:S). It indicates that S-doping is not so effective in improving the zT value of [Formula: see text] materials by high-pressure synthesis.

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Design and construction of a new steady-state apparatus for medium thermal conductivity measurement at high temperature

Review of Scientific Instruments ◽

10.1063/1.5006529 ◽

2017 ◽

Vol 88 (10) ◽

pp. 104903 ◽

Cited By ~ 2

Author(s):

Yong Wang ◽

Peng Xiao ◽

Jingmin Dai

Keyword(s):

Thermal Conductivity ◽

Steady State ◽

High Temperature ◽

Conductivity Measurement ◽

Thermal Conductivity Measurement ◽

State Apparatus ◽

Design And Construction

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Thermal conductivity effects on steady state propagation speed during self-propagating high-temperature synthesis of Ti+C green compacts

Materials Science and Engineering B ◽

10.1016/j.mseb.2007.10.020 ◽

2008 ◽

Vol 147 (1) ◽

pp. 19-26 ◽

Cited By ~ 3

Author(s):

Z. Huque ◽

G.M.S. Azad

Keyword(s):

Thermal Conductivity ◽

Steady State ◽

High Temperature ◽

Propagation Speed ◽

Temperature Synthesis ◽

High Temperature Synthesis ◽

State Propagation

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Development and Testing of a High Thermal Conductivity Refractory Tile System in a Waste-to-Energy Combustion Unit

15th Annual North American Waste-to-Energy Conference ◽

10.1115/nawtec15-008 ◽

2007 ◽

Author(s):

Patrick M. Stephan

Keyword(s):

Thermal Conductivity ◽

High Temperature ◽

Tube Wall ◽

Radical Change ◽

High Thermal Conductivity ◽

Waste To Energy ◽

Refractory Materials ◽

Tile System ◽

Tile Systems ◽

New System

Refractory systems are used for tube wall protection in waste-to-energy (WTE) boilers. Through the years, continuous adjustments have been made to the refractory materials and product designs. Design modifications have incrementally improved tile systems from bolt-on to hidden-clip to back-cast systems. Different refractory types, such as gunning cements and other monolithics, have also been used with varying degrees of success. A new refractory system is currently evolving, borrowed from other advanced high temperature applications and adapted to fit WTE boiler designs. This new system is a radical change in design from conventional refractory systems.

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