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Recommended Papers for: Electron Microscopy

Total Papers Found: 5

Anisotropy measurements of a cuboid of nanostructured hydrothermally prepared Bi0.45Sb1.55Te3

Thermoelectric materials can be used to convert waste heat, such as solar energy and automobile exhaust, to electricity. A Bi0.45Sb1.55Te3 p-type cuboid was created using hydrothermal synthesis, cold pressing, and evacuated-and-encapsulated sintering in a Pyrex ampoule. The figure of merit (z) was determined by finding three transport parameters: electrical conductivity, thermopower, and thermal conductivity. The thermal conductivity measurements on the three (A, ...

Author(s): , , ,

Low thermal conductivity and enhanced thermoelectric performance of nanostructured Al-doped ZnTe 

This article investigates the effect of aluminum doping on the thermal conductivity and other thermoelectric properties of nanostructured Zn1•XAlXTe (0 ≤ X ≤ 0.15) for a temperature range of 300 K – 600 K. The thermal conductivity was measured using the transient plane source (TPS) technique by a thermal constants analyzer. It was found that with increasing doping of aluminum, the thermal conductivity decreased, and with increasing temperature thermal conductivity also decreased. The decreasing of thermal ...

Author(s): , , , ,

New tannin-lignin aerogels

Tannin and lignin are organic materials that are more cost-effective than synthetic, non-renewable phenolic compounds. In this paper, tannin-lignin-formaldehyde (TLF) composites were used to synthesize thermally insulative mesoporous aerogels. A thermal analyzer measured the thermal conductivity of two TLF samples using the transient plane source (TPS) method. Results showed that the TLF aerogels had better thermal insulation properties than any other organic aerogels reported in the literature, and were well ...

Author(s): , , , , , ,

Texture, transport and mechanical properties of graphite nanoplatelet/silicone composites produced by three roll mill

Using a three-roll mill process, graphite nanoplatelets (GNPs) were dispersed in a silicone polymer for application as a thermal interface material. Through the use of electron microscopy and XRD, the researchers were able to determine that the GNPs dispersed better when using the three-roll milling process as compared to previously used methods. GNPs were mixed with the silicone polymer in wt.% up to 25, with the highest wt.% yielding the highest ...

Author(s): , , ,

Thermal and Electrical Conductivity of Single- and Multi-walled Carbon nanotube-epoxy Composites 

Thermal conductivity measurements of the same samples were carried out using the TPS method. Thermal testing on carbon nanotubes to study for promising fillers.  Thermal conductivity of single-walled carbon nanotubes should enable a further reduction in the filler content required for a given enhancement in the composite properties. For the multi-walled carbon nanotube thermal conductivity increased modestly using this method whereas for the single-walled carbon nanotubes the thermal conductivity was ...

Author(s): , , ,