Cubic yttria stabilized zirconia sintering additive impacts: A comparative study

Flegler, Andrew J.; Burye, Theodore E.; Yang, Qing; Nicholas, Jason D.

doi:10.1016/j.ceramint.2014.07.071

Cited by 62 publications

(36 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…8 mol% YSZ (8YSZ) and 10 mol% YSZ (10YSZ) were each mixed with 2 mol% [17,22,23] Bi 2 O 3 powder (99.9%, Aladdin Industrial Corporation, Shanghai, China), adding ethanol as an abrasive, and ground in a planetary ball mill for 10 h. The ground powder was then pressed into disks with a diameter of 10 mm and a thickness of 2 mm via cold isostatic pressing. The disks were then sintered in air atmosphere for 2 h at 1100, 1200, 1300, and 1400 °C, respectively.…”

Section: Methodsmentioning

confidence: 99%

Effect of Bismuth Oxide on the Microstructure and Electrical Conductivity of Yttria Stabilized Zirconia

Liu

Zhou

Tian

et al. 2016

Sensors

View full text Add to dashboard Cite

Bismuth oxide (Bi2O3)-doped yttria-stabilized zirconia (YSZ) were prepared via the solid state reaction method. X-ray diffraction and electron diffraction spectroscopy results indicate that doping with 2 mol% Bi2O3 and adding 10 mol% yttria result in a stable zirconia cubic phase. Adding Bi2O3 as a dopant increases the density of zirconia to above 96%, while reducing its normal sintering temperature by approximately 250 °C. Moreover, electrical impedance analyses show that adding Bi2O3 enhances the conductivity of zirconia, improving its capability as a solid electrolyte for intermediate or even lower temperatures.

show abstract

Section: Methodsmentioning

confidence: 99%

Effect of Bismuth Oxide on the Microstructure and Electrical Conductivity of Yttria Stabilized Zirconia

Liu

Zhou

Tian

et al. 2016

Sensors

View full text Add to dashboard Cite

show abstract

“…Flegler et al 88 proposed that the additive of powder surface coating affected the increasing ionic conductivity of YSZ electrolyte. Flegler et al 88 proposed that the additive of powder surface coating affected the increasing ionic conductivity of YSZ electrolyte.…”

Section: Conductivity Properties and Performance Of Sofcsmentioning

confidence: 99%

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

et al. 2019

View full text Add to dashboard Cite

Solid Oxide Fuel Cells (SOFCs) are an electrochemical energy converter that receives the world's attention as a power generation system of the future owing to its flexibility to consume various types of fuels, low emission of greenhouses gases, and having high efficiency reaching over 70%. A conventional SOFCs operates at high temperature, typically ranges between 800 to 1000°C. SOFCs use yttria-stabilized zirconia (YSZ) as the electrolyte, which exhibits excellent oxide ion conductivity in this temperature range. However, this temperature range poses an issue to SOFCs durability, as it leads to the degradation of the cell components. In addition, SOFCs application is limited and difficult to implement for the transportation sector and portable appliance. A viable solution is to lower the SOFCs operating temperature to intermediate (600 to 800°C ) or low (<600°C) operating temperature. The benefit of this way, cell durability will improve, as well as other advantages such as facilitates handling, assembling, dismantling, cost reduction, and expanded the SOFCs application. Nonetheless, the key challenge for the issue is finding suitable electrolyte, as YSZ have lower ionic conductivity at low and intermediate temperature range. The aim of this paper is to review the status and challenges in the attempts made to modify YSZ electrolyte within the past decade. The resulting ionic conductivity, microstructure, and densification, mechanical and thermal properties of these 'new' electrolytes critically reviewed. The targeted conductivity of modification of YSZ electrolyte must be exceeded >0.1 S cm -1 to enable high performance of SOFCs power generation systems to be realized for transportation and portable applications. Based on our knowledge, this paper is the first review which focused on the recent status and challenges of YSZ electrolyte towards lowering the operating temperature.

show abstract

“…Fleger et al, 16 analysed the influence of several sintering additives on cubic zirconia added from barium, bismuth, calcium, cobalt, copper, iron, lithium, magnesium, manganese, nickel, strontium or zinc nitrates ranging from 1 to 3 at%. It was found that Fe, Mn, Ni, Co and Zn were confirmed to enhance 8YSZ sintering without destabilizing the cubic structure.…”

Section: Introductionmentioning

confidence: 99%

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

Marcomini

Souza

2016

Mat. Res.

View full text Add to dashboard Cite

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.

show abstract

Cubic yttria stabilized zirconia sintering additive impacts: A comparative study

Cited by 62 publications

References 66 publications

Effect of Bismuth Oxide on the Microstructure and Electrical Conductivity of Yttria Stabilized Zirconia

Effect of Bismuth Oxide on the Microstructure and Electrical Conductivity of Yttria Stabilized Zirconia

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

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

Contact Info

Product

Resources

About