Manufacture and Testing of Thermoelectric Modules Consisting of B_xC and TiO_x Elements

Abstract

The synthesis and production of thermoelectrical active ceramic materials, the concepts of the module design by simulation, the assembly of modules by laser joining, and the investigations concerning the operation modes are described in this paper. Investigations of the material structure, the phase composition, and the thermoelectrical properties illustrate the material development. The newly developed technological route is described. The simulated results of thermoelectric modules for operational cases are compared with gained experimental data.

Thermal conductivity of PrRh4.8B2, a layered boride compound

“…[1][2][3][4][5][6][7] Regarding properties, many studies have been carried out into the magnetism of borides, [7][8][9][10][11][12][13][14] and recent especial efforts have been made to develop the high temperature thermoelectric properties of novel borides. [15][16][17][18][19][20] Being refractory materials, thermoelectric borides have the potential to be used in high impact energy-saving applications like topping cycles for power plants and waste heat power generation in industry. 21,22 The quality of thermoelectric materials can be expressed by the figure of merit ZT = S 2 T /ρκ, where S, ρ, κ, and T are the Seebeck coefficient, electrical resistivity, thermal conductivity, and temperature, respectively.…”

Thermoelectric properties of boron carbide/HfB2 composites

“…In general, boron carbide-based materials have excellent potential as high-temperature thermoelectric materials since both the Seebeck coefficient and electrical conductivity increase with temperature while the thermal conductivity is relatively small with little temperature dependence at high temperatures [42,53], leading to a ZT value which increases strongly with temperature. We are also planning further experiments with suitable instrumentation to measure the thermoelectric properties at higher temperatures (with better densified materials) as the ZT value is expected to still increase beyond the temperature range investigated in the present study.…”

“…The n-type counterparts to boron carbide; the rare earth borocarbonitrides [38][39][40][41] are also of interest. Regarding research for application of thermoelectric borides, it is striking that manufacture and testing of thermoelectric bulk modules containing boron carbide at elevated temperatures have been carried out recently [42].…”

Spark Plasma Sintering of Tungsten Oxides WOx (2.50 ≤ x ≤ 3): Phase Analysis and Thermoelectric Properties

“…By now, TMOs are subject of in-depth investigations [2][3][4] in particular because there is still a lack of appropriate n-type counterparts, although lanthanum-doped SrTiO 3 [5], ZnO [6] or doped TiO 2−x [7][8][9] show promising results.…”

“…Recently WO2.72 (W18O49) and WO2.90 (W20O58) were successfully prepared by spark plasma sintering (SPS) being promising bulk TE materials [11,12,24]. SPS combines the solid-state reaction of powdered precursor mixtures with simultaneous shaping, and provides an effective manufacturing route for TE materials due to low temperatures and short reaction times [8]. The samples around the composition WO2.90 still showed the formation of a further phase which was interpreted as WO2.96 [25].…”