Synthesis of Ca3Co4O9 ceramics by polymerized complex and hydrothermal hot-pressing processes and the investigation of its thermoelectric properties

High temperature thermoelectric properties and energy transfer devices of Ca3Co4−xAgxO9 and Ca1−ySmyMnO3

“…One approach to improve the thermoelectric properties is optimisation of the material preparation technique and post treatment. In this regard, several methods have been developed to obtain improved thermoelectric properties [11,23,28,[31][32][33][34]. For example, Lan et al [28] reported a co-precipitation method to prepare fine-grained CaMnO 3 -based ceramics with decreased thermal conductivity due to the enhancement of grain boundary scattering.…”

Thermoelectric Materials and Devices

“…Conventional SSR and the sol-gel method are simple techniques in many types of synthesis methods for oxide thermoelectric materials. Many other methods, such as hydrothermal, 67 combustion, 68 sol-gel, 66 etc, are available, but we do not discuss them in detail. For the SrTiO 3 -based materials, we list only the highest figure of merit obtained using each synthesis method in Figure 6.16.…”

Synthesis, mechanical and magnetic properties of transition metals-doped Ca3Co3.8M0.2O9

“…[13], or inventing the novel synthesis method [14][15][16]. Ca 3 Co 4 O 9 was generally prepared by a conventional solid state reaction starting from a mixture of calcium carbonate and cobalt oxide [3,10].…”

“…Ca 3 Co 4 O 9 was generally prepared by a conventional solid state reaction starting from a mixture of calcium carbonate and cobalt oxide [3,10]. However, some reports show that the Ca 3 Co 4 O 9 samples synthesized by the sol-gel method have a finer grain size and more uniform size distribution, which are believed to be an important key figures to improve thermoelectric properties [14,16].…”