Lanthanum silicate thin films for SOFC electrolytes synthesized by magnetron sputtering and subsequent annealing

Vieira, M.M.; Oliveira, J.C.; Shaula, A.L.; Cavaleiro, A.; Trindade, B.

doi:10.1016/j.surfcoat.2012.01.042

Cited by 13 publications

(8 citation statements)

References 53 publications

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“…To overcome this obstacle, we have started the research to prepare thin films of lanthanum silicates directly on the electrode substrates as electrode supported-type SOFCs. There are some previous researches to make lanthanum silicate films by sol-gel method [17], thermal spraying [18][19][20], sputtering [21,22] and tape casting [23]. To the best of our knowledge, none of these researches, however, have succeeded in making highly conductive lanthanum silicate films and in preparing electrode supported SOFCs.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of apatite-type lanthanum silicate films and anode supported solid oxide fuel cells using nano-sized printable paste

Yoshioka

Mieda

Funahashi

et al. 2014

Journal of the European Ceramic Society

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Apatite-type lanthanum silicate based films have attracted significant interests to use as an electrolyte of solid oxide fuel cells (SOFCs) working at intermediate temperature. We have prepared Mg doped lanthanum silicate (MDLS) films on NiO-MDLS cermet substrates by spin coating and sintering of nano-sized printable paste made by beads milling. Changes in crystal structure and microstructure of the paste films with the sintering temperature have been investigated to show that porous network structure with a grain growth evolves up to 1300 °C, whereas densification occurred above 1400 °C. Anode supported SOFCs using the pasted MDLS films were successfully fabricated: an open circuit voltage of 0.91 V and a maximum power density of 150 mW cm −2 measured at 800 °C were obtained with the electrolyte film sintered at 1500 °C.

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Section: Introductionmentioning

confidence: 99%

Fabrication of apatite-type lanthanum silicate films and anode supported solid oxide fuel cells using nano-sized printable paste

Yoshioka

Mieda

Funahashi

et al. 2014

Journal of the European Ceramic Society

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“…24,25,31 In contrast, a highly c-axis orientation was observed for the LSO thin film prepared from the non-refluxed solution. 24,25,31 In contrast, a highly c-axis orientation was observed for the LSO thin film prepared from the non-refluxed solution.…”

Section: Resultsmentioning

confidence: 85%

“…[19][20][21][22][23][24][25] The sol-gel method enables various oxide thin films to be produced without expensive equipment. [19][20][21][22][23][24][25] The sol-gel method enables various oxide thin films to be produced without expensive equipment.…”

Section: Introductionmentioning

confidence: 99%

Chemical solution deposition of the highly c-axis oriented apatite type lanthanum silicate thin films

et al. 2015

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Highly c-axis oriented apatite-type lanthanum silicate (LSO) thin films were fabricated by a simple solution coating method. In the solution coating method, LSO thin films are obtained by crystallization of initially deposited amorphous LSO precursor thin films. The degree of orientation was influenced by the precursor morphologies and a dense LSO precursor led to a high c-axis orientation perpendicular to the substrate. The oriented LSO thin films were composed of columnar grains with a single crystal orientation over the entire film thickness. In-plane orientation was not detected, which indicates that the c-axis orientation of the LSO thin films can be attributed to self-orientation.

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“…Low-temperature methods such as mechanical milling [7], sputtering [8,9], plasma spraying [10,11] and sol-gel processing [12] have been applied successfully for the synthesis of oxyapatites. Hydrothermal treatments have also been used to synthesize isostructural apatites, i.e.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Preparation of Apatite-Type Phases La9.33Si6O26 and La9M1Si6O26.5 (M = Ca, Sr, Ba)

Noviyanti¹,

Prijamboedi²,

Marsih³

et al. 2012

itbj.sci.

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Apatite-type lanthanum silicates show a great potential to be used as an electrolyte for intermediate-to low-temperature (600-700 C) solid oxide fuel cells (ITSOFC). However, so far these materials need to be prepared using a very high-temperature method, thus there is a growing interest to prepare apatites at lower temperatures. This paper reports the synthesis of undoped La 9.33 Si 6 O 26 and doped apatites (La 9 CaSi 6 O 26,5 , La 9 SrSi 6 O 26,5 , and La 9 BaSi 6 O 26,5 ) from raw materials La 2 O 3 , Na 2 SiO 4 , BaCO 3 , CaCO 3 , and SrCO 3 using a hydrothermal method. The polycrystalline apatites were obtained as a white powder, after the basic solution of the reagent mixture was heated at 240 C in an autoclave for 3 days. Le Bail refinement of the X-ray powder diffraction data showed that the compounds have a hexagonal cell (P 6 3 /m space group). In this paper, the undoped La 9.33 Si 6 O 26 and La-doped apatite ionic conductivities are also presented.

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Lanthanum silicate thin films for SOFC electrolytes synthesized by magnetron sputtering and subsequent annealing

Cited by 13 publications

References 53 publications

Fabrication of apatite-type lanthanum silicate films and anode supported solid oxide fuel cells using nano-sized printable paste

Fabrication of apatite-type lanthanum silicate films and anode supported solid oxide fuel cells using nano-sized printable paste

Chemical solution deposition of the highly c-axis oriented apatite type lanthanum silicate thin films

Hydrothermal Preparation of Apatite-Type Phases La9.33Si6O26 and La9M1Si6O26.5 (M = Ca, Sr, Ba)

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