Transitional metal-doped 8 mol% yttria-stabilized zirconia electrolytes

Zhang, T.S.; Du, Zehui; Li, S.; Kong, Ling Bing; Song, Xiaochao; Lü, Jie; Ma, Jan

doi:10.1016/j.ssi.2009.08.004

Cited by 50 publications

(27 citation statements)

References 32 publications

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“…Lowering its sintering temperature would avoid this reaction, enhancing the electrode/ electrolyte interface electrical conductivity. There are several studies showing the use of sintering additives in YSZ [10][11][12][13][14] . In a nutshell, the main issues 15 .…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive

Marcomini

Souza

2016

Mat. Res.

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Adding ZnO reduces sintering temperature of yttria stabilized zirconia. Adding up to 0.5 wt% of ZnO is possible to densify to 8 mol% yttria stabilized zirconia (TZ8Y) to 95% of relative density at 1300 °C, besides, the electrical conductivity increases about 30% at 800 °C when compared to pure TZ8Y with the same relative density and average grain size. These results show that TZ8Y co-doped with ZnO can be a potential electrolyte to solid oxide fuel cells and electrolyzer cells.

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Section: Introductionmentioning

confidence: 99%

Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive

Marcomini

Souza

2016

Mat. Res.

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“…Van Herle and Vasquez [25] observed fast densification of 8%YSZ with the addition of small amounts of NiO (1.5% in mol). Recently, Zhang et al [26] reported an improvement on 8%YSZ densification with NiO addition. However, all sintering processes in these cases were accomplished on the conventional method, which involves high temperatures and long time of sintering (~24h).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of electrical conductivity and density of 8 mol% yttria-stabilized zirconia produced by Spark Plasma Sintering

Polla¹,

Valentini²,

Junior³

et al. 2016

Blucher Chemistry Proceedings

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In this work, 8 mol% yttria-stabilized zirconia (8%YSZ) containing micro or nanoparticles were manufactured by Spark Plasma Sintering technique, in order to improve sample densification and control grain growth. The electrical conductivity of dense 8%YSZ pellets sintered was investigated by electrochemical impedance spectroscopy (EIS). Preliminary results showed for samples produced from both micro and nanoparticle sintered at 1000 °C for 5 min, the relative density is approximately 98 %, while for the others samples sintered at 1200 °C the density is above 99 %. These densities are higher in comparison to the same composite sintered by conventional method. The electrical measurements were carried out at 500 °C in air and the best results were obtained for samples with nano particle size in comparison with micro granulometry. The SPS process allows using lower temperatures and shorter times to produce materials with high density and controlled grain growth.

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“…It has been confirmed that transition metal oxides are effective sintering promoters for densification of SOFC electrolytes. As reported by Zhang and Du et al,doping of transition metal oxides (TMOs) such as Mn and Ni was found to be an effective sintering aids for zirconia ceramic [10]. Grain interior is the disintegration of dopant in the electrolyte lattice doping can increase or decrease on grain boundary conduction.…”

Section: Introductionmentioning

confidence: 98%

Microstructure, Crystal structure and ionic conductivity of 3 mol % (Fe, Mn, Co, Zn) doped 8YSZ

et al. 2016

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Abstract. Effect of 3 mol% of transition elements doped 8YSZ such as YSZZn, YSZFe, YSZCo and YSZMn on the ionic conductivity. SOFCs mostly operate at higher temperature. By substitute with dopants, it can reduce the operating temperature and costs. In this experiment, 3 mol% dopants mixed with 8YSZ and sintered at 1550 °C, hold for two hours. Crystal structure, microstructure, sintering behaviour and ionic conductivity at 300 o C were investigated. XRD demonstrates three phases (cubic, monoclinic and tetragonal) were obtained. It was confirmed that small additions of TMOs (Mn, Fe, Co and Zn) promotes densification, grain growth and ionic conductivity compared to pure 8YSZ. YSZZn obtained the highest ionic conductivity, 3.55 X 10 -3 mS cm -1 at 300 °C.

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Transitional metal-doped 8 mol% yttria-stabilized zirconia electrolytes

Cited by 50 publications

References 32 publications

Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive

Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive

Evaluation of electrical conductivity and density of 8 mol% yttria-stabilized zirconia produced by Spark Plasma Sintering

Microstructure, Crystal structure and ionic conductivity of 3 mol % (Fe, Mn, Co, Zn) doped 8YSZ

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