Mechanical properties of LaCoO3 based ceramics

Orlovskaya, Nina; Kleveland, Kjersti; Grande, Tor; Einarsrud, Mari‐Ann

doi:10.1016/s0955-2219(99)00084-9

Cited by 66 publications

(36 citation statements)

References 17 publications

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“…For the preparation of bulk lanthanum cobaltate ceramics, different methods, such as solid state [50][51][52], co-precipitation [53,54], spray-pyrolysis [55], microemulsion [56], combustion [19,57,58] and reactive grinding [59] techniques could be used. Sol-gel chemistry routes using citric acid [18], EDTA [60] and glycine [61] as complexing agents were also suggested for the preparation of LaCoO 3 -based ceramics. Recently for the preparation of different garnets, aluminates and superconductors, we elaborated an aqueous glycolate sol-gel processing route [62][63][64][65][66][67].…”

Section: Introductionmentioning

confidence: 99%

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

Cizauskaite

Kareiva

2008

Open Chemistry

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This paper reports on the results concerning the sol-gel preparation and characterization of Sr-substituted perovskite lanthanum cobaltates La 1-x Sr x CoO 3-d (x = 0.0, 0.25, 0.5 and 0.75). The metal ions, generated by dissolving starting materials in diluted acetic acid were complexed by 1,2-ethanediol to obtain the precursors for the non-substituted and Sr-substituted LaCoO 3 . The influence of the synthesis temperature, heating time and the amount of substituent on the phase purity of La 1-x Sr x CoO 3-d were investigated. The phase transformations, composition and micro-structural features in the gels and polycrystalline samples were studied by thermal analysis (TG/DTA), infrared spectroscopy (IR), powder X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). © Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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Section: Introductionmentioning

confidence: 99%

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

Cizauskaite

Kareiva

2008

Open Chemistry

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“…LaCoO 3 perovskite has rhombohedral symmetry (space group R3c (167)) (hexagonal setting) [JCPDS 00-025-1060] (see Table II). La 1−x Sr x CoO 3 has the same rhombohedral structure in the range of x = 0 ÷ 0.5 for Sr. For values of x > 0.5 the system becomes cubic [3]. In our case, the volume of the cell changed with the increase of the Sr dopant (Table II).…”

Section: X-ray Diffraction Analysismentioning

confidence: 62%

Structural Characterization of La_1-xSr_xCoO₃ Thin Films Deposited by Pulsed Electron Deposition Method

et al. 2016

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The aim of the presented research was to investigate the influence of strontium dopant on the structure and composition of La1−xSrxCoO3 (x = 0, 0.1, 0.2) perovskite thin films. Pure and Sr doped LaCoO3 thin films were grown by pulsed electron deposition technique on crystalline epi-polished Si/MgO substrates. Numerous analytical techniques (scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction) were applied to characterize their phase/chemical composition, structure and surface morphology. X-ray diffraction analysis showed the presence of pure LaCoO3 perovskite phase in the undoped thin film. For Sr doped thin films La0.8Sr0.2CoO3 (x = 0.2), La0.9Sr0.1CoO3 (x = 0.1) small contents of La2 O3 and LaSrCoO4 phases were noticed. The crystallite sizes, calculated from the Williamson-Hall plots, were about 18 nm for all analyzed films. According to scanning electron microscopy/atomic force microscopy observations, obtained thin films were free from defects and cracks. Atomic force microscopy (tapping mode) analysis revealed the differences in the shape and quantity of surface crystallites for all thin films as a result of Sr doping and different deposition parameters. Atomic force microscopy technique also allowed measurement of roughness parameters for analyzed samples. X-ray photoelectron spectroscopy analyses of chemical states of elements of thin films showed that their chemical state was stable across the film thickness and even at the interface with the MgO substrate. X-ray photoelectron spectroscopy analysis also allowed to evaluate chemical states and atomic concentration of La, Co, and Sr elements within cross-sections of deposited thin films.

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“…Recently, the attention of researchers was concentrated on the ferroelasticity of the LaCoO 3 -based system [11][12][13][14][15][16][17][18]. But till now, its origin is still in discussion.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the low-frequency mechanical properties of La0.6Sr0.4Co1−xFexO3−δ materials

Cao

Kong

et al. 2011

Journal of Alloys and Compounds

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Mechanical properties of LaCoO3 based ceramics

Cited by 66 publications

References 17 publications

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

Structural Characterization of La_1-xSr_xCoO₃ Thin Films Deposited by Pulsed Electron Deposition Method

Investigation on the low-frequency mechanical properties of La0.6Sr0.4Co1−xFexO3−δ materials

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Mechanical properties of LaCoO3 based ceramics

Cited by 66 publications

References 17 publications

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

Structural Characterization of La1-xSrxCoO3 Thin Films Deposited by Pulsed Electron Deposition Method

Investigation on the low-frequency mechanical properties of La0.6Sr0.4Co1−xFexO3−δ materials

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Structural Characterization of La_1-xSr_xCoO₃ Thin Films Deposited by Pulsed Electron Deposition Method