Effect of sintering aids on the conductivity of BaCe0.9Ln0.1O3−δ

Amsif, M.; Marrero-López, D.; Ruiz-Morales, J.C.; Саввин, С.Н.; Núñez, P.

doi:10.1016/j.jpowsour.2011.06.086

Cited by 55 publications

(45 citation statements)

References 37 publications

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“…As it was noted above, the introduction of 3d-elements to the basic materials not only influences the nature of the solid electrolyte's conductivity, but also the level of the grain boundary and bulk conductivity. Despite the fact that some authors did not observe the effect of the increasing grain boundary or the bulk conductivity of materials containing small amounts of transition elements [225], the rest reported inverse results [151,155] (cf. Table 15).…”

Section: Baceo 3 Doped and Modified By 3d-elementsmentioning

confidence: 99%

BaCeO3: Materials development, properties and application

Medvedev

Мурашкина

Demin

et al. 2014

Progress in Materials Science

345

158

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Section: Baceo 3 Doped and Modified By 3d-elementsmentioning

confidence: 99%

BaCeO3: Materials development, properties and application

Medvedev

Мурашкина

Demin

et al. 2014

Progress in Materials Science

345

158

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“…Furthermore, the decrease in the proton conductivity of BCY electrolyte synthesized using sintering aids such as NiO and ZnO, was reported by some researchers. 19), 20) It is also considered that the addition of NiO to BCY electrolyte affects its conductive property. Therefore, we will evaluate the bulk and grain boundary conductivities of BCY(NiO) electrolyte as well as determine the proton transference number in our future work.…”

Section: Characterizaion Of Materialsmentioning

confidence: 99%

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

Shimoda

Kobayashi

Kimura

et al. 2017

J. Ceram. Soc. Japan

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Electrochemical synthesis of ammonia (NH 3 ) using a proton conducting solid electrolyte and nickel (Ni) cermet electrodes has been studied. As an electrolyte, BaCe 0.9 Y 0.1 O 3¹¤ (BCY) perovskite-type oxide was prepared by a co-precipitation method and its electrolyte pellet was synthesized by the sintering method with small amount of nickel oxide (NiO) as a sintering aid. The NiBCY cermet was employed as electrodes of anode and cathode. To evaluate the performance of this cell, electrochemical synthesis of NH 3 from dry nitrogen (N 2 ) and wet hydrogen (H 2 ) was conducted at 500°C. As a result, the maximum formation rate of NH 3 was 3.36 © 10 ¹10 mol s ¹1 cm ¹2 at the applied voltage of ¹0.2 V against open circuit voltage using the NiBCY«BCY(NiO)«NiBCY cell, and the Faradic efficiency was 0.63%. Durability test of NH 3 electrochemical synthesis from dry N 2 and wet H 2 revealed that current density of cell was relatively stable for 15 h but NH 3 formation rate was decreased slightly. In addition, using NiBCY based cell, NH 3 was successfully synthesized from dry N 2 and steam diluted argon with the applied voltage of ¹1.8 V at a rate of 2.79 © 10 ¹10 mol s ¹1 cm ¹2 and the Faradic efficiency was 0.15%. And this fabricated cell kept the high NH 3 formation rate during the long-term test at ¹2.0 V for 15 h.

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“…In terms of this, the addition of sintering aids is considered as a much simpler way to realize the reduction of the sintering temperature and to increase the relative density. In previous studies, various transitional metal oxides were used as sintering aids in order to improve the sintering of BaZr x Ce y Y z O 3-δ based ceramics 17,18,[21][22][23][24][25][26][27] . These results indicate that NiO and ZnO are effective sintering aids to improve the sintering of BaZrO 3 -BaCeO 3 solid solution materials.…”

Section: Introductionmentioning

confidence: 99%

The effect of NiO on the conductivity of BaZr_0.5Ce_0.3Y_0.2O_3−δ based electrolytes

Jönsson

Zhao

2016

RSC Adv.

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The effects of NiO on the sintering behaviors, morphologies and conductivities of BaZr0.5Ce0.3Y0.2O3-δ (BZCY532) based electrolytes were systematically investigated. 1 wt.% NiO powder was added by different methods during the sample preparations: (i) added during ball-milling before a powder mixture calcination (named BZCY(Ni)532), (ii) no NiO addition in the whole preparation procedure (named BZCY532) and (iii) added after a powder mixture calcination (named BZCY532(Ni)). The conductivities of these three kinds of dense BZCY532 ceramics were investigated in dry air, wet N2 and wet H2 atmospheres, respectively. Moreover, the electronic contributions to the total conductivities were also identified in a broad oxygen partial pressure range. According to the achieved results, it can be concluded that the dense BZCY(Ni)532 ceramics showed the best enhanced oxygen and proton conductivities, followed by the BZCY532(Ni) and BZCY532 ceramics. Furthermore, the BZCY(Ni)532 and BZCY532 ceramics showed a tiny electronic conductivity, when the testing temperatures were lower than 800 ℃. However, the BZCY532(Ni) ceramics revealed an obvious electronic conduction when they were tested at temperatures of 600 -800 ℃. Therefore, it is preferable to add the NiO during powder preparation, which can lower the sintering temperature and also increase the conductivity of BZCY532-based electrolytes.Please do not adjust margins Please do not adjust margins density than the sintered BZCY532(Ni) pellets'. To be more specific, the relative densities of the sintered BZCY(Ni)532 and BZCY532(Ni) pellets increased when the sintering temperature increased from 1300 ℃ to 1400 ℃. However, their relative densities did not continue to increase when the sintering temperatures were even higher. In contrast, a reversed change tendency was occurred when the sintering temperatures of 1500 ℃ and 1600 ℃ were applied. According to the furnace limitation in the lab, no higher sintering temperatures were tested in this study.

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Effect of sintering aids on the conductivity of BaCe0.9Ln0.1O3−δ

Cited by 55 publications

References 37 publications

BaCeO3: Materials development, properties and application

BaCeO3: Materials development, properties and application

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

The effect of NiO on the conductivity of BaZr_0.5Ce_0.3Y_0.2O_3−δ based electrolytes

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Effect of sintering aids on the conductivity of BaCe0.9Ln0.1O3−δ

Cited by 55 publications

References 37 publications

BaCeO3: Materials development, properties and application

BaCeO3: Materials development, properties and application

Electrochemical synthesis of ammonia using a proton conducting solid electrolyte and nickel cermet electrode

The effect of NiO on the conductivity of BaZr0.5Ce0.3Y0.2O3−δ based electrolytes

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The effect of NiO on the conductivity of BaZr_0.5Ce_0.3Y_0.2O_3−δ based electrolytes