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In the present work, dense perovskite ceramics were successfully prepared from a series of La1−xBaxCoO3 solid solutions in the range of substitution 0 ≤ x ≤ 0.75 using solid state reaction and conventional sintering. Structural properties of La1−xBaxCoO3 were systematically investigated and thermoelectric properties were measured in the temperature range of 330-1000 K. The results show that the thermoelectric properties of Ba-substituted LaCoO3 depend on x. Indeed, at 330 K, electrical conductivity presents an optimum value for x = 0.25 with a value of σmax ≈ 2.2×105 S·m-1 whereas the Seebeck coefficient decreases when x and/or the temperature increases. The Ba-substituted LaCoO3 samples exhibit p-type semiconducting behaviour. The best power factor value found is 3.4×10-4 W·m-1·K-2 at 330 K for x = 0.075, which is 10% higher than the optimum value measured in La1-xSrxCoO3 for x = 0.05. The thermal diffusivity and thermal conductivity increase with increasing temperature and Ba concentration. La1−xBaxCoO3 shows a maximum figure of merit (ZT = 0.048) for x = 0.05 at 330 K, 25% higher than the best value in La1-xSrxCoO3 compounds.


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Ba substitution for enhancement of the thermoelectric properties of LaCoO3 ceramics (0≤x≤0.75)

Show Author's information Mohamed Ali BOUSNINAa,bFabien GIOVANNELLIaLoïc PERRIEREcGuillaume GUEGANdFabian DELORMEa( )
Université François Rabelais de Tours, CNRS, INSA CVL, GREMAN UMR7347, IUT de Blois, 15 rue de la chocolaterie, CS2903, F-41029 Blois Cedex, France
Université Paris 13, Sorbonne Paris Cite, Laboratoire des Sciences des Procédés et des Matériaux, CNRS, UPR 3407, 99 avenue J.B. Clément, F-93430 Villetaneuse, France
Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS-UPEC, 2-8 Rue Henri Dunant, 94320 Thiais, France
ST Microelectronics, 16 Rue Pierre et Marie Curie, Tours 37100, France

Abstract

In the present work, dense perovskite ceramics were successfully prepared from a series of La1−xBaxCoO3 solid solutions in the range of substitution 0 ≤ x ≤ 0.75 using solid state reaction and conventional sintering. Structural properties of La1−xBaxCoO3 were systematically investigated and thermoelectric properties were measured in the temperature range of 330-1000 K. The results show that the thermoelectric properties of Ba-substituted LaCoO3 depend on x. Indeed, at 330 K, electrical conductivity presents an optimum value for x = 0.25 with a value of σmax ≈ 2.2×105 S·m-1 whereas the Seebeck coefficient decreases when x and/or the temperature increases. The Ba-substituted LaCoO3 samples exhibit p-type semiconducting behaviour. The best power factor value found is 3.4×10-4 W·m-1·K-2 at 330 K for x = 0.075, which is 10% higher than the optimum value measured in La1-xSrxCoO3 for x = 0.05. The thermal diffusivity and thermal conductivity increase with increasing temperature and Ba concentration. La1−xBaxCoO3 shows a maximum figure of merit (ZT = 0.048) for x = 0.05 at 330 K, 25% higher than the best value in La1-xSrxCoO3 compounds.

Keywords:

perovskite, Ba-substituted LaCoO3, oxide, thermoelectric, p-type semiconductor
Received: 16 March 2019 Revised: 10 April 2019 Accepted: 15 April 2019 Published: 04 December 2019 Issue date: December 2019
References(37)
[1]
PG Radaelli, SW Cheong. Structural phenomena associated with the spin-state transition InLaCoO3. Phys Rev B 2002, 66: 094408.
[2]
G Maris, Y Ren, V Volotchaev, et al. Evidence for orbital ordering InLaCoO3. Phys Rev B 2003, 67: 224423.
[3]
K Knížek, Z Jirák, J Hejtmánek, et al. Structural anomalies associated with the electronic and spin transitions in LnCoO3. Eur Phys J B 2005, 47: 213-220.
[4]
C Zobel, M Kriener, D Bruns, et al. Evidence for a low-spin to intermediate-spin state transition InLaCoO3. Phys Rev B 2002, 66: 020402.
[5]
AP Sazonov, IO Troyanchuk, H Gamari-Seale, et al. Neutron diffraction study and magnetic properties of La1-xBaxCoO3 (x = 0.2 and 0.3). J Phys: Condens Matter 2009, 21: 156004.
[6]
I Terasaki, Y Sasago, K Uchinokura. Large thermoelectric power in NaCo2O4 single crystals. Phys Rev B 1997, 56: R12685-R12687.
[7]
SW Li, R Funahashi, I Matsubara, et al. High temperature thermoelectric properties of oxide Ca9Co12O28. J Mater Chem 1999, 9: 1659-1660.
[8]
AC Masset, C Michel, A Maignan, et al. Misfit-layered cobaltite with an anisotropic giant magnetoresistance: Ca3Co4O9. Phys Rev B 2000, 62: 166-175.
[9]
F Delorme, CF Martin, P Marudhachalam, et al. Effect of Ca substitution by Sr on the thermoelectric properties of Ca3Co4O9 ceramics. J Alloys Compd 2011, 509: 2311-2315.
[10]
S Saini, HS Yaddanapudi, K Tian, et al. Terbium ion doping in Ca3Co4O9: A step towards high-performance thermoelectric materials. Sci Rep 2017, 7: 44621.
[11]
F Delorme, P Diaz-Chao, F Giovannelli. Effect of Ca substitution by Fe on the thermoelectric properties of Ca3Co4O9 ceramics. J Electroceram 2018, 40: 107-114.
[12]
H Yamauchi, K Sakai, T Nagai, et al. Parent of misfit-layered cobalt oxides: [Sr2O2]qCoO2. Chem Mater 2006, 18: 155-158.
[13]
R Funahashi, M Shikano. Bi2Sr2Co2Oy whiskers with high thermoelectric figure of merit. Appl Phys Lett 2002, 81: 1459-1461.
[14]
JC Diez, E Guilmeau, MA Madre, et al. Improvement of Bi2Sr2Co1.8Ox thermoelectric properties by laser floating zone texturing. Solid State Ionics 2009, 180: 827-830.
[15]
MA Madre, FM Costa, NM Ferreira, et al. High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing. J Eur Ceram Soc 2016, 36: 67-74.
[16]
R Funahashi, T Barbier. Thermoelectric properties of (BaCoO3-y)nBaCo8O11. AIP Conf Proc 2016, 1763: 030004.
[17]
F Delorme, C Chen, B Pignon, et al. Promising high temperature thermoelectric properties of dense Ba2Co9O14 ceramics. J Eur Ceram Soc 2017, 37: 2615-2620.
[18]
C Cong, F Delorme, F Schoenstein, et al. Synthesis, sintering, and thermoelectric properties of Co1-xMxO(M = Na, 0 ≤ x ≤ 0.07; M = Ag, 0 ≤ x ≤ 0.05). J Eur Ceram Soc 2019, 39: 346-351.
[19]
J Androulakis, P Migiakis, J Giapintzakis. La0.95Sr0.05CoO3: An efficient room-temperature thermoelectric oxide. Appl Phys Lett 2004, 84: 1099-1101.
[20]
X Zhang, XM Li, LC Tong, et al. Thermoelectric and transport properties of La0.95Sr0.05CoO3. J Cryst Growth 2006, 286: 1-5.
[21]
H Kozuka, H Yamada, T Hishida, et al. Electronic transport properties of the perovskite-type oxides La1-xSrxCoO3±δ. J Mater Chem 2012, 22: 20217-20222.
[22]
C Papageorgiou, GI Athanasopoulos, T Kyratsi, et al. Influence of processing conditions on the thermoelectric properties of La1-xSrxCoO3(x=0, 0.05). AIP Conf Proc 2012, 1449: 323-326.
[23]
MA Bousnina, R Dujardin, L Perriere, et al. Synthesis, sintering, and thermoelectric properties of the solid solution La1-xSrxCoO3±δ (0 ≤ x ≤ 1). J Adv Ceram 2018, 7: 160-168.
[24]
K Muta, Y Kobayashi, K Asai. Magnetic, electronic transport, and calorimetric investigations of La1-xCaxCoO3 in comparison with La1-xSrxCoO3. J Phys Soc Jpn 2002, 71: 2784-2791.
[25]
H Masuda, T Fujita, T Miyashita, et al. Transport and magnetic properties of R1-xAxCoO3(R = La, Pr and Nd; A = Ba, Sr and Ca). J Phys Soc Jpn 2003, 72: 873-878.
[26]
H Kozuka, K Yamagiwa, K Ohbayashi, et al. Origin of high electrical conductivity in alkaline-earth doped LaCoO3. J Mater Chem 2012, 22: 11003-11005.
[27]
RD Sánchez, J Mira, J Rivas, et al. Magnetoresistance, temporal evolution, and relaxation of the electrical resistivity in the re-entrant semiconducting La0.80Ba0.20CoO3 perovskite. J Mater Res 1999, 14: 2533-2539.
[28]
A Barman, M Ghosh, SK De, et al. Electrical transport properties of bulk La1−xBaxCoO3 at low temperature. Phys Lett 1997, 234: 384-390.
[29]
SB Patil, HV Keer, DK Chakrabarty. Structural, electrical, and magnetic properties in the system BaxLa1-xCoO3. Phys Stat Sol (a) 1979, 52: 681-686.
[30]
MS Khalil. Synthesis, X-ray, infrared spectra and electrical conductivity of La/Ba-CoO3 systems. Mater Sci Eng 2003, 352: 64-70.
[31]
J Rodríguez-Carvajal. Recent advances in magnetic structure determination by neutron powder diffraction. Phys B Condens Matter 1993, 192: 55-69.
[32]
NMLNP Closset, RHE Van Doorn, H Kruidhof, et al. About the crystal structure of La1-xSrxCoO3-δ (0 ≤ x ≤ 0.6). Powder Diffr 1996, 11: 31-34.
[33]
Luo WJ, Wang FW. Powder X-ray diffraction and Rietveld analysis of La1-xBaxCoO3 (0 < x ≤ 0.5). Powder Diffr 2006, 21: 304-306.10.1154/1.2358363
[34]
RD Shannon. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Cryst Sect A 1976, 32: 751-767.
[35]
C Cong, F Giovannelli, T Chartier, et al. Synthesis and thermoelectric properties of doubly substituted La0.95Sr0.05Co1-xCrxO3 (0 ≤ x ≤ 0.5). Mater Res Bull 2018, 102: 257-261.
[36]
K Iwasaki, T Ito, T Nagasaki, et al. Thermoelectric properties of polycrystalline La1−xSrx CoO3. J Solid State Chem 2008, 181: 3145-3150.
[37]
R Kun, S Populoh, L Karvonen, et al. Structural and thermoelectric characterization of Ba substituted LaCoO3 perovskite-type materials obtained by polymerized gel combustion method. J Alloys Compd 2013, 579: 147-155.
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Publication history

Received: 16 March 2019
Revised: 10 April 2019
Accepted: 15 April 2019
Published: 04 December 2019
Issue date: December 2019

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© The author(s) 2019

Acknowledgements

The authors acknowledge Programme d’Investissment d’Avenir PIA "Tours 2015" for the financial support.

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