Sintering and electrochemical performance of Y2O3-doped barium zirconate with Bi2O3 as sintering aids

Le, Shiru; Zhang, Jing; Zhu, Xiaodong; Zhai, Jingru; Sun, Kening

doi:10.1016/j.jpowsour.2013.01.065

Cited by 33 publications

(23 citation statements)

References 23 publications

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“…In contrast, the relative density of the pellet with x=0.1 was about 95% with some closed pores. It was concluded that Bi doping was contribute to the improvement of the sintering behavior, which can be explained by that Bi 2 O 3 facilitated the atom diffusion along grain boundary, and thus promoted sintering activity [25,32,33]. On the other hand, for x = 0.1, small peaks of (Ba, Bi)Ox was detected by XRD, which might be caused by the formation of A-site deficiency perovskite with considerable vacancy, as shown in Eq.…”

Section: Conductivitymentioning

confidence: 98%

“…Furthermore, the results indicated that lower grain boundary density is beneficial for reducing grain boundary resistance for BaZrO 3 -based oxides [20]. another effective way to decrease the sintering temperatures is through the assistance of various sintering aids, such as ZnO [14], CuO [22], NiO [23], LiNO 3 [24], and Bi 2 O 3 [25]. For instance, Tao et al [14] reported that the Y-doped BaZrO 3 pellet samples with 4%mol ZnO addition could get fully dense at 1325 • C. However, few reports have been given about BaZrO 3 -based electrolyte film preparation with the addition of sintering aids.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bismuth and indium co-doping strategy for developing stable and efficient barium zirconate-based proton conductors for high-performance H-SOFCs

Ling

Chen

Niu

et al. 2016

Journal of the European Ceramic Society

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Section: Conductivitymentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Bismuth and indium co-doping strategy for developing stable and efficient barium zirconate-based proton conductors for high-performance H-SOFCs

Ling

Chen

Niu

et al. 2016

Journal of the European Ceramic Society

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“…Os óxidos do tipo perovskita têm a fórmula geral ABO3, sendo A um cátion monovalente, divalente ou trivalente e B um cátion trivalente, tetravalente ou pentavalente. No caso do material em estudo, o cátion A será o bário (Ba 2+ ) e o B será o zircônio (Zr 4+ ), obtendo-se o BaZrO3 (LE et al, 2013).…”

Section: Introductionunclassified

Sinterização de cerâmicas de BaZr1− xYxO3 − δ para uso em células a combustíveis de óxido sólido

Borges¹,

Gonçalves²,

Rodrigues³

et al. 2019

RBES

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ResumoOs materiais cerâmicos a base de zirconato de bário dopado com 8, 15 e 20 % em mol de ítrio (BaZr 1− x Y x O 3 − δ ) foram sintetizados pelo método dos precursores poliméricos com calcinação em 700, 800 e 900ºC por 2 horas. As nanopartículas foram analisadas por difração de raios X obtendo-se a estrutura cúbica do tipo perovskita. Pela equação de Scherrer calculou-se o tamanho médio dos cristalitos, sendo de 20,89; 18,30 e 15,17 nm para a dopagem com 8, 15 e 20 % em mol de ítrio, respectivamente. A sinterabilidade para o zirconato de bário dopado com 15% em mol de ítrio foi verificada por análise dilatométrica, Microscopia Eletrônica de Varredura por Efeito de Campo (MEV/FEG) e pelo método de Arquimedes. As amostras sinterizadas a 1600 °C por 4 horas apresentaram 56,8; 58,9 e 73,8% de densificação para 8, 15 e 20 % em mol de ítrio, respectivamente. A partir disso, verifica-se um aumento na sinterização com a inserção de maior concentração de dopante, sendo de grande importância para a aplicação em eletrólitos sólidos condutores protônicos utilizados em células a combustível. Palavras-chave: eletrólito sólido condutor protônico, precursores poliméricos, energia limpa AbstractCeramic materials based on barium zirconate doped-yttrium with 8; 15 and 20 mol% (BaZr 1− x Y x O 3 − δ ), were synthesized by the polymeric precursor method with calcination at 900 °C for 2 hours. The nanoparticles were analyzed by X-ray diffraction obtaining the cubic structure of the perovskite type. By the Scherrer equation the average crystallite size was calculated, being 20.89; 18.30 and 15.17 nm for doping with 8, 15 and 20 mol% of yttrium, respectively. The sinterability of the materials was verified by dilatometric analysis, scanning electron microscopy (SEM/FEG) and by the Archimedes method. Samples sintered at 1600 °C for 4 hours showed 56.8; 58.9 and 73.8% densification to 8, 15 and 20 mol% yttrium, respectively. From this, there is an increase in sintering with the insertion of higher dopant concentration, being of great importance for the application in proton conducting solid oxide fuel cells.

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“…13,14 Therefore, Y 2 O 3 is utilized in many fields such as photocatalysis 8 and luminescence. 10,15 There are several synthesis strategies to incorporate yttrium oxide into metal oxide.…”

Section: ■ Introductionmentioning

confidence: 99%

Solar-to-Electric Performance Enhancement by Titanium Oxide Nanoparticles Coated with Porous Yttrium Oxide for Dye-Sensitized Solar Cells

Wang

et al. 2015

ACS Sustainable Chem. Eng.

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TiO 2 −Y 2 O 3 core−shell nanoparticles for dyesensitized solar cells (DSSCs) have been fabricated by a solvothermal technique. The heterostructure of TiO 2 nanoparticles coated with porous Y 2 O 3 is confirmed with transmission electron microscopy. The bonding of the Y 2 O 3 coating on the TiO 2 surface is quantitatively analyzed in terms of the Lifshitz− van der Waals and electrostatic contributions to the surface free energy of the particles. TiO 2 and Y 2 O 3 constitute a core−shell heterojunction because the Fermi levels merge; this increases the open-circuit voltage. Higher recombination resistances are obtained in DSSCs with porous Y 2 O 3 -coated TiO 2 compared with those in the reference cells, indicating "backscattering" inhibition of the porous Y 2 O 3 barrier on TiO 2 nanoparticles. Moreover, smaller transport resistances and longer electron lifetimes are achieved in DSSCs with TiO 2 −Y 2 O 3 core−shell nanoparticles. Compared with a reference cell, the V OC of a DSSC with a partial Y 2 O 3 coating on the surface of the TiO 2 nanoparticles improves from 683 to 738 mV and the J sc from 14.15 to 15.35 mA·cm −2 , whereas the conversion efficiency increases by 15.2%.

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Sintering and electrochemical performance of Y2O3-doped barium zirconate with Bi2O3 as sintering aids

Cited by 33 publications

References 23 publications

Bismuth and indium co-doping strategy for developing stable and efficient barium zirconate-based proton conductors for high-performance H-SOFCs

Bismuth and indium co-doping strategy for developing stable and efficient barium zirconate-based proton conductors for high-performance H-SOFCs

Sinterização de cerâmicas de BaZr1− xYxO3 − δ para uso em células a combustíveis de óxido sólido

Solar-to-Electric Performance Enhancement by Titanium Oxide Nanoparticles Coated with Porous Yttrium Oxide for Dye-Sensitized Solar Cells

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