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This paper reports on the results of a numerical modeling that considers the field grading phenomena of SiC powder with a variable resistivity dependent on particle size. The particle shape and size of commercially available SiC powders were altered by ball milling. In an earlier work, we have determined the electrical properties of various SiC powders by using a controlled-pressure Ohmmeter. Different...
Based on theoretical analysis, the strain characteristics of electroactive acrylic elastomer was studied by experiments. In the experiments, the electroactive acrylic elastomer was realised with a biaxial pre-stretched circular film coated with two compliant electrodes of graphite powder or conductive adhesive. Electroactive strain values were measured for different electrode materials, pre-strain...
ldquoDevelopment for advanced thermoelectric conversion systemsrdquo supported by the new energy and industrial technology development organization (NEDO) has been successfully completed as one of the Japanese national energy conservation projects. Three types of the cascaded thermoelectric modules operating up to 850 K in high electrode temperature and two types of Bi-Te thermoelectric modules operating...
Deformation of Bi2Te3-based materials was performed. The source disks with nominal compositions of (Bi0.25Sb0.75)2Te3, (Bi0.25Sb0.75)2(Te0.95Se0.05)3 and (Bi0.90Sb0.10)2(Te0.95Se0.05)3 were cut from the ingots grown by the vertical Bridgman method (VBM). The disks were deformed by either cold press (CP) or pressure current heating (PCH). The crystal structures of the deformed materials were identified...
Decreasing the length of thermoelectric (TE) module legs results in a significant increase in power density, both for cooling applications and electricity generation. However, this reduction also results in a significant increase of mechanical stress in the legs materials. Thus, it is important to implement an effective method to characterize the mechanical properties, such as mechanical spectroscopy,...
The possibility to use powder consisting of fullerite microcrystals as device sensitive to external axial mechanical load is considered. As we suppose the change of conductivity of fullerite microcrystal powder as function of external mechanical stress to be useful for creation of nanoscale devices of sensor electronics. This new effect based on changing of intermolecular distance between fullerene...
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