Flash combustion synthesis of electron doped-CaMnO3 thermoelectric oxides

Mouyane, Mohamed; Itaalit, Brahim; Bernard, J.; Houivet, David; Noudem, Jacques

doi:10.1016/j.powtec.2014.05.022

Cited by 41 publications

(8 citation statements)

References 39 publications

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“…This porous morphology is attributed to the release of a large volume of gases during the combustion process (N 2 , CO 2 , and H 2 O) according to the combustion reactions as shown in equations (Equations ). This result is in accordance with the previous research . On the other hand, the SEM data in Figure D show that the Urea‐combustion sample is well crystallized and dense microstructure.…”

Section: Resultssupporting

confidence: 92%

Sintering behavior of magnesium aluminate spinel MgAl₂O₄ synthesized by different methods

Mouyane

Jaber

Bendjemil

et al. 2019

Int J Applied Ceramic Tech

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This paper is focusing basically on the ceramic technology, of which several methods for the synthesis of MgAl2O4 have been investigated. The synthesis conditions regarding the powders cleanliness, microstructure, and sintering parameters of MgAl2O4 were studied. MgAl2O4 powder was synthesized via conventional solid‐state route using different milling process: vertical attrition milling, WAB as a high‐energy horizontal attrition milling, and Pulverisette as a planetary ball miller, and via solution combustion route using Urea, Glycine, and a mixture of Urea/Glycine. Urea and Glycine was used as fuel. The white powders were obtained for all solid‐state routes and for Urea‐combustion technique. The black and gray powders were obtained in the case of combustion technique, respectively, using a fuel of Glycine and Glycine/Urea mixture. The obtained powders and pellets were characterized by XRD, SEM, and Dilatometry. The results show that, among all the solid‐state route processes, wet attrition milling gives the better and clean spinel phase. The WAB milling and Pulverisette miller introduce a contamination by some yttria‐stabilized zirconia balls in the corresponding powder. Furthermore, the flash combustion technique permit to have nanoparticles with a dense spinel phase of MgAl2O4 and with lower sintering temperature in less time and with no calcination step.

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Section: Resultssupporting

confidence: 92%

Sintering behavior of magnesium aluminate spinel MgAl₂O₄ synthesized by different methods

Mouyane

Jaber

Bendjemil

et al. 2019

Int J Applied Ceramic Tech

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“…From the TG curves, it is possible to observe that the chemical reactions to form the CMO phase are completed around 1273 K, so, this temperature was adopted for the calcination of the powder. Mouyane et al 31 also observed that after 1273 K there is no more occurrence of any reaction in CMO powder. Based on dilatometric analysis for green CMO ceramic, the sintering temperature was set at 1498 K. Some studies have announced sintering temperature at 1423 K 32 , 1473 K 20 , 1573 K 33 , 1623 K 12 , indicating that this adopted sintering temperature is in accordance with the literature.…”

Section: Resultsmentioning

confidence: 91%

Microstructural Influence on Thermoelectric Properties of CaMnO3 Ceramics

et al. 2020

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Thermoelectric properties of pure polycrystalline CaMnO 3 ceramics were significantly enhanced by increasing sintering holding time from 1 to 24 h. The Seebeck coefficient values were reduced while the sintering holding time was increased, and the DC electrical conductivity was enhanced from 255 S/m to 1.748 S/m. This same effect was observed in electronic thermal conductivity, increasing from 5x10-3 to 3.5x10-2 W/m K, whereas the lattice thermal conductivity decreased from 5.0 to 4.0 W/m K at 873K. Overall, CaMnO 3 ceramic sintered for 24 h demonstrated the best performance, which presented a Figure-of-Merit value of about 0.03. The grain size of the samples ranged from 2.79 µm to 6.45 µm, due to the sintering holding time, directly influencing the high-temperature thermoelectric properties of CaMnO 3 ceramics.

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“…20 Because of its low cost, nontoxic, chemical and thermal stability, oxidation resistance in the air, it has been comprehensively studied as thermo-electric material, rechargeable batteries materials, oxygen electrocatalysis, catalyst carriers, and so on. [21][22][23][24] In this paper, we discussed the possibility of CMO to serve as the buffer layer in hybrid halide perovskites solar cells.…”

Section: Introductionmentioning

confidence: 99%

Calcium manganate: A promising candidate as buffer layer for hybrid halide perovskite photovoltaic-thermoelectric systems

Zhao

Wang

et al. 2014

Journal of Applied Physics

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We have systematically studied the feasibility of CaMnO3 thin film, an n-type perovskite, to be utilized as the buffer layer for hybrid halide perovskite photovoltaic-thermoelectric device. Locations of the conduction band and the valence band, spontaneous polarization performance, and optical properties were investigated. Results indicate the energy band of CaMnO3 can match up well with that of CH3NH3PbI3 on separating electron-hole pairs. In addition, the consistent polarization angle helps enlarge the open circuit voltage of the composite system. Besides, CaMnO3 film shows large absorption coefficient and low extinction coefficient under visible irradiation, demonstrating high carrier concentration, which is beneficial to the current density. More importantly, benign thermoelectric properties enable CaMnO3 film to assimilate phonon vibration from CH3NH3PbI3. All the above features lead to a bright future of CaMnO3 film, which can be a promising candidate as a buffer layer for hybrid halide perovskite photovoltaic-thermoelectric systems.

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Flash combustion synthesis of electron doped-CaMnO3 thermoelectric oxides

Cited by 41 publications

References 39 publications

Sintering behavior of magnesium aluminate spinel MgAl₂O₄ synthesized by different methods

Sintering behavior of magnesium aluminate spinel MgAl₂O₄ synthesized by different methods

Microstructural Influence on Thermoelectric Properties of CaMnO3 Ceramics

Calcium manganate: A promising candidate as buffer layer for hybrid halide perovskite photovoltaic-thermoelectric systems

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Flash combustion synthesis of electron doped-CaMnO3 thermoelectric oxides

Cited by 41 publications

References 39 publications

Sintering behavior of magnesium aluminate spinel MgAl2O4 synthesized by different methods

Sintering behavior of magnesium aluminate spinel MgAl2O4 synthesized by different methods

Microstructural Influence on Thermoelectric Properties of CaMnO3 Ceramics

Calcium manganate: A promising candidate as buffer layer for hybrid halide perovskite photovoltaic-thermoelectric systems

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Sintering behavior of magnesium aluminate spinel MgAl₂O₄ synthesized by different methods

Sintering behavior of magnesium aluminate spinel MgAl₂O₄ synthesized by different methods