Measurement system for doping and alloying trends in new thermoelectric materials

2003 ◽  
Author(s):  
T. Hogan ◽  
N. Ghelani ◽  
S. Loo ◽  
S. Sportouch ◽  
S.-J. Kim ◽  
...  
Keyword(s):  
Measurement System ◽  
Thermoelectric Materials

Doping and Alloying Trends in New Thermoelectric Materials

2001 ◽  
Vol 691 ◽  
Author(s):  
Sim Loo ◽  
Sangeeta Lal ◽  
Theodora Kyratsi ◽  
Duck-Young Chung ◽  
Kuei-Fang Hsu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Sample Preparation ◽  
Measurement System ◽  
Thermoelectric Materials ◽  
Bulk Materials ◽  
Preparation Time ◽  
Short Sample ◽  
Hall Effect Measurements ◽  
Computer Controlled

ABSTRACTNew thermoelectric bulk materials such as CsBi4Te6 have shown superior properties to traditional materials, however, optimal performance requires continuing investigations of doping and alloying trends. A recently modified high throughput measurement system is presented for doping and alloying investigations in several new thermoelectric materials. The modification includes a four-probe configuration for more accurate measurements while maintaining a relatively short sample preparation time. The system is fully computer controlled and provides flexible contacts to accommodate various sample dimensions. Optimal compositions are then identified for further investigations in thermoelectric prototype modules. The most promising materials will be further characterized for electrical conductivity, thermoelectric power, thermal conductivity, and Hall effect measurements as a function of temperature.

Characterization of New Materials in A Four-Sample Thermoelectric Measurement System

2000 ◽  
Vol 626 ◽  
Author(s):  
Nishant A. Ghelani ◽  
Sim Y. Loo ◽  
Duck-Young Chung ◽  
Sandrine Sportouch ◽  
Stephan de Nardi ◽  
...  
Keyword(s):  
Measurement System ◽  
Thermoelectric Materials ◽  
Measurement Techniques ◽  
New Materials ◽  
Thermo Electric ◽  
New Synthesis ◽  
Wide Range ◽  
Materials Research ◽  
Computer Controlled

ABSTRACTSeveral new materials in the CsBi4Te6, A2Bi8Se13, (A = K, Rb, Cs), HoNiSb, Ba/Ge/B (B = In, Sn), and AgPbBiQ3 (Q = S, Se, Te) systems have shown promising characteristics for thermoelectric applications. New synthesis techniques are able to produce samples at much higher rates than previously possible. This has led to a persistent challenge in thermoelectric materials research of rapid and comprehensive characterization of samples. This paper presents a description of a new 4-sample transport measurement system and the related measurement techniques. Special features of the system include fully computer-controlled operation (implemented in LabView™) for simultaneous measurement of electrical conductivity, thermo-electric power, and thermal conductivity. This system has been successfully used to characterize several new thermoelectric materials (including some of the above-mentioned compounds) and reference materials exhibiting a wide range of thermal conductivities.

scholarly journals High Temperature Measurement System Design for Thermoelectric Materials In Power Generation Application

2003 ◽  
Vol 793 ◽  
Author(s):  
Sim Loo ◽  
Jarrod Short ◽  
Kuei Fang Hsu ◽  
Mercouri Kanatzidis ◽  
Tim Hogan
Keyword(s):  
Power Generation ◽  
System Design ◽  
Measurement System ◽  
Thermoelectric Materials ◽  
Temperature Stability ◽  
Design Development ◽  
High Temperature Measurement ◽  
Characterization Of Materials ◽  
Temperature Measurement System ◽  
Sample Measurement

ABSTRACTRecent interest in thermoelectric materials for power generation applications has initiated the development of a measurement system in our laboratory for characterization of materials in the 80K to 800K temperature range. This system has been specifically designed for measuring thermoelectric power and electrical conductivity as needed for determining the power factor of the measured samples. This is a single sample measurement system based on a continuous flow cryostat. Significant effort has gone into the computer controlled data acquisition and PID controlled temperature stabilization. Investigation of the influence of temperature stability on the measured data will be presented along with important aspects of the system design, development, and testing. Data collected on reference materials and new thermoelectric materials of interest will be presented.

scholarly journals Anisotropy and inhomogeneity measurement of the transport properties of spark plasma sintered thermoelectric materials

2012 ◽  
Vol 1490 ◽  
pp. 89-95 ◽  
Author(s):  
A. Jacquot ◽  
M. Rull ◽  
A. Moure ◽  
J.F. Fernandez-Lozano ◽  
M. Martin-Gonzalez ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Transport Properties ◽  
Measurement System ◽  
Thermoelectric Materials ◽  
Simultaneous Measurement ◽  
Measurement Systems ◽  
Spark Plasma ◽  
Van Der Pauw

ABSTRACTWe report on the development and capabilities of two new measurement systems developed at Fraunhofer-IPM. The first measurement system is based on an extension of the Van der Pauw method and is suitable for cube-shaped samples. A mapping of the electrical conductivity tensor of a Skutterudite-SPS samples produced at the Instituto de Microelectrónica de Madrid is presented. The second measurement system is a ZTmeter also developed at the Fraunhofer-IPM. It enables the simultaneous measurement of the electrical conductivity, Seebeck coefficient and thermal conductivity up to 900 K of cubes at least 5x5x5 mm3 in size. The capacity of this measurement system for measuring the anisotropy of the transport properties of a (Bi,Sb)2Te3SPS sample produced by KTH is demonstrated by simply rotating the samples.

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