Preparation and characterization of La1–xSrxMnO3+δ (0⩽x⩽0.6) powder by sol–gel processing

Gaudon, Manuel; Laberty-Robert, Christel; Ansart, Florence; Stevens, Philippe; Rousset, A.

doi:10.1016/s1293-2558(01)01208-0

Cited by 179 publications

(128 citation statements)

References 25 publications

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“…They observed that using acetates gave less secondary phases, and discussed this in relation to the pH in the solution and its influence on the chelating ability of CA. Several complexing agents have been used, but the most typical is CA, both with (Gaudon et al 2002) and without (Fan and Liu 2009) addition of EG as a polymerization agent. The ratio between CA and metal cations has been demonstrated to be an important parameter.…”

Section: Lanthanum Transition Metal Perovskite Oxides For Energy Techmentioning

confidence: 99%

Modified Pechini Synthesis of Oxide Powders and Thin Films

Sunde

Grande

Einarsrud

2016

Handbook of Sol-Gel Science and Technology

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The modified Pechini method has become one of the most popular synthesis methods for complex oxide materials due to its simplicity and versatility. The method can be applied to synthesize nano-crystalline powders, bulk materials as well as oxide thin films. Here, we present a comprehensive review of the method with focus on the chemistry through the three stages of the process; preparation of stable aqueous solution, poly-esterification to form a solid polymeric resin and finally decomposition/combustion of the resin to form an amorphous oxide followed by crystallization of the desired oxide phase. The review include

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Section: Lanthanum Transition Metal Perovskite Oxides For Energy Techmentioning

confidence: 99%

Modified Pechini Synthesis of Oxide Powders and Thin Films

Sunde

Grande

Einarsrud

2016

Handbook of Sol-Gel Science and Technology

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“…Then, the solution was heated on thermal plate under constant stirring at 80°C to eliminate the excess of water and to obtain a viscous gel [10]. Finally, the powders were grinded in an agate mortar and annealed at 900°C for 4 h [11].…”

Section: Experimental Section Preparation Of Samplesmentioning

confidence: 99%

Fe doping effects on the structural, magnetic, and magnetocaloric properties of nano-sized Pr0.6Bi0.4Mn1−x Fe x O3 (0.1 ≤ x ≤ 0.3) manganites

et al. 2015

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The structural, magnetic, and magentocaloric properties are systematically investigated for Pr 0.6 Bi 0.4-Mn 1-x Fe x O 3 (0.1 B x B 0.3) manganites. The samples have been synthesized by sol-gel method. X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy were employed to investigate the crystalline structure. Magnetization measurements were used to investigate the magnetic properties. All the samples crystallize in the orthorhombic Pnma space group as expected for manganite compounds. The presence of a PrMn 2 O 5 compound is also evidenced by XRD. The average size of the manganite particles is about 50-60 nm. Particle characterizations at the atomic level turn to be of paramount importance. Magnetic measurements versus temperature under an applied magnetic field of 0.01 T show that all samples exhibit a paramagnetic-ferromagnetic transition. Temperature-dependent magnetization measurements and Arrott analysis reveal second-first order ferromagnetic transitions for (x = 0.1 and x = 0.2). The magnetic entropy change |DS M | was estimated using Maxwell relation method and is found to reach maximum values of 0.47 and 0.37 J/kg/K under an applied magnetic field of 5 T for x = 0.1 and x = 0.2, respectively.

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“…The LSMCu powders sintered at 1250°C showed single perovskite, but the sample with a composition of x = 0.4 contained a second phase with peaks observed at 32 and 42°2ª. The limit of the Sr content in the LSM system was reported to be 0.5 mol, 11) but a second phase was observed in the La 1¹x Sr x Mn 0.8 Cu 0.2 O 3 system for the sample with x = 0.4. They were identified as strontium copper oxide (SrCuO 2 ) and copper oxide (Cu 2 O).…”

Section: Methodsmentioning

confidence: 93%

Structural analysis and electrical conductivity of La1−xSrxMn0.8Cu0.2O3−δ (0.1 ≤ x ≤ 0.4) for IT-SOFCs

Ryu

Noh

Kim

et al. 2012

J. Ceram. Soc. Japan

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La 1x Sr x Mn 0.8 Cu 0.2 O 3¤ (LSMCu, 0.1¯x¯0.4) powders were prepared using the EDTA-citrate complexing process. The synthesized LSMCu powders were a pure perovskite phase, whereas the composition with x = 0.4 has second phases. The unit cell volumes decreased with increasing Sr 2+ content because substituted Sr ions cause an increase in Mn 4+ ions, which has a smaller ionic radius than Mn 3+. The electrical conductivity also improved with increasing Sr addition in 0.1¯x¯0.3, revealing a small polaron hopping mechanism. The oxidation state of Mn ions increased with the addition of Sr ions in 0.1¯x¯0.3 but the oxidation state of Cu ions was unchanged in 0.1¯x¯0.3. The addition of Sr ions in the A-site of LSMCu can lead to a contraction of the lattice volume because of the decreased MnO bond length and increased Mn 4+ ions, which can enhance the electrical conductivity.

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Preparation and characterization of La1–xSrxMnO3+δ (0⩽x⩽0.6) powder by sol–gel processing

Cited by 179 publications

References 25 publications

Modified Pechini Synthesis of Oxide Powders and Thin Films

Modified Pechini Synthesis of Oxide Powders and Thin Films

Fe doping effects on the structural, magnetic, and magnetocaloric properties of nano-sized Pr0.6Bi0.4Mn1−x Fe x O3 (0.1 ≤ x ≤ 0.3) manganites

Structural analysis and electrical conductivity of La<sub>1−</sub><i><sub>x</sub></i>Sr<i><sub>x</sub></i>Mn<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3−δ</sub> (0.1 ≤ <i>x</i> ≤ 0.4) for IT-SOFCs

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