Effect of Yttria-Stabilized Zirconia Thickness on Crystal Structure and Electric Property of Epitaxial CeO2/Yttria-Stabilized Zirconia Buffer Layer in Metal/Ferroelectric/Insulator/Semiconductor Structure

2001 ◽  
Vol 40 (Part 1, No. 1) ◽  
pp. 281-284 ◽  
Author(s):  
Tomoaki Yamada ◽  
Naoki Wakiya ◽  
Kazuo Shinozaki ◽  
Nobuyasu Mizutani
Keyword(s):  
Crystal Structure ◽  
Buffer Layer ◽  
Semiconductor Structure ◽  
Yttria Stabilized Zirconia ◽  
Electric Property ◽  
Stabilized Zirconia

scholarly journals Deposition of yttria-stabilized zirconia buffer layer on Si and its suitability for Y-Ba-Cu-O thin films

1991 ◽  
Vol 14 (2) ◽  
pp. 423-427
Author(s):  
V R Katti ◽  
S K Gupta ◽  
A K Debnath ◽  
N C Jaydeven ◽  
L C Gupta ◽  
...  
Keyword(s):  
Thin Films ◽  
Buffer Layer ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia

Performance Investigation of Dual Layer Yttria-Stabilized Zirconia–Samaria-Doped Ceria Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells

2016 ◽  
Vol 13 (1) ◽  
Author(s):  
Ryan J. Milcarek ◽  
Kang Wang ◽  
Michael J. Garrett ◽  
Jeongmin Ahn
Keyword(s):  
Fuel Cell ◽  
Buffer Layer ◽  
Sintering Temperature ◽  
Solid Oxide ◽  
Yttria Stabilized Zirconia ◽  
Cell Performance ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Stabilized Zirconia ◽  
Fuel Cell Performance

The performance of yttria-stabilized zirconia (YSZ)–samaria-doped ceria (SDC) dual layer electrolyte anode-supported solid oxide fuel cell (AS-SOFC) was investigated. Tape-casting, lamination, and co-sintering of the NiO–YSZ anode followed by wet powder spraying of the SDC buffer layer and BSCF cathode was proposed for fabrication of these cells as an effective means of reducing the number of sintering stages required. The AS-SOFC showed a significant fuel cell performance of ∼1.9 W cm−2 at 800 °C. The fuel cell performance varies significantly with the sintering temperature of the SDC buffer layer. An optimal buffer layer sintering temperature of 1350 °C occurs due to a balance between the YSZ–SDC contact and densification at low sintering temperature and reactions between YSZ and SDC at high sintering temperatures. At high sintering temperatures, the reactions between YSZ and SDC have a detrimental effect on the fuel cell performance resulting in no power at a sintering temperature of 1500 °C.

Heteroepitaxy of Ir films on silicon with a ceria/yttria stabilized zirconia buffer layer

2012 ◽  
Vol 520 (23) ◽  
pp. 6888-6892 ◽  
Author(s):  
V.G. Beshenkov ◽  
L.A. Fomin ◽  
D.V. Irzhak ◽  
V.A. Marchenko ◽  
V.I. Nikolaichik ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia

scholarly journals Molybdenum Oxide and Nickel Nitrate as Cooperative Sintering Aids for Yttria-Stabilized Zirconia

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2875
Author(s):  
Clay Hunt ◽  
John Kyle Allemeier ◽  
David Driscoll ◽  
Adam Weisenstein ◽  
Stephen Sofie
Keyword(s):  
Crystal Structure ◽  
Sintering Temperature ◽  
Yttria Stabilized Zirconia ◽  
Spontaneous Generation ◽  
Sintering Aids ◽  
Stabilized Zirconia ◽  
Sintering Aid ◽  
Molybdenum Compound ◽  
Order Of Magnitude ◽  
Nano Rods

The entirely accidental observation of increased sintering performance of nickel-infiltrated yttria-stabilized zirconia (8YSZ) in a molybdenum and oxygen rich atmosphere was explored. Molybdenum and nickel were found to be synergistic sintering aids for 8YSZ. However, sintering had to take place in an atmosphere of flowing oxygen. Samples sintered in air consistently burst. The sintering performance, microstructure, and crystal structure of 8YSZ with additions of both Mo and Ni together are compared to the sintering performance, microstructure, and crystal structure of pure 8YSZ, 8YSZ with only Ni added as a sintering aid, and 8YSZ with only Mo added as a sintering aid. Enhanced densification and grain growth is observed in the Mo–Ni 8YSZ samples when compared to all other sintering samples. Order of magnitude sintering rate increases are observed in the Mo–Ni 8YSZ over that of pure 8YSZ. With a maximum sintering temperature of 1200 °C and a one-hour dwell, sintered densities of 85% theoretical density (5.02 g⁄cm3) are achieved with the Mo–Ni samples: a 57% increase in density over pure 8YSZ sintered with the same sintering profile. EIS results suggest conductivity may not be negatively impacted by the use of these two sintering aids at temperatures above 750 °C. Finally, the spontaneous generation of nickel-molybdenum nano-rods was observed on the 5, and 10 mol.% Mo–Ni infiltrated 8YSZ samples after being left under vacuum in a scanning electron microscope chamber, suggesting evaporation of a possible nickel–molybdenum compound from the sample fracture surfaces.

Effect of Li2O additions upon the crystal structure, sinterability and electrical properties of yttria stabilized zirconia electrolyte

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106555-106562 ◽  
Author(s):  
Jie Xiong ◽  
Chengran Jiao ◽  
Minfang Han ◽  
Wentao Yi ◽  
Jie Ma ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electrical Properties ◽  
High Conductivity ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Zirconia Electrolyte

By adding 0.5 mol% Li2O, YSZ was densified at 1250 °C, and also had a high conductivity of 0.0313 S cm−1 at 800 °C.

Microstructure study on selective laser melting yttria stabilized zirconia ceramic with near IR fiber laser

2014 ◽  
Vol 20 (5) ◽  
pp. 346-354 ◽  
Author(s):  
Qi Liu ◽  
Bo Song ◽  
Hanlin Liao
Keyword(s):  
Crystal Structure ◽  
Relative Density ◽  
Ceramic Sample ◽  
Yttria Stabilized Zirconia ◽  
Fibre Laser ◽  
Micro Hardness ◽  
Stabilized Zirconia ◽  
Laser Melting ◽  
Content Type ◽  
Near Ir

Purpose – The purpose of this paper is to explore selective laser melting of yttria-stabilized zirconia (YSZ) ceramic by a 1 μm wavelength fibre laser; investigate the influence of different laser powers and different scanning velocities on the microstructure, the relative density, the deformation of ceramic sample and the micro-hardness; and analyze the crystal structure transformation during the fabrication. Design/methodology/approach – During the fabrication, the 5 mm × 5 mm × 5 mm YSZ ceramic samples are fabricated by rapid prototyping (RP) machine MCP Realizer SLM 250; density and microscopic photographs show the ceramic melting situation. The density of cubic sample with different laser powers and different scanning velocities is measured by Archimedes method. The microstructure of samples and powder is observed by SEM. The micro-hardness is measured by the Vickers micro-hardness equipment, and the crystal structure transition is studied by XRD. Findings – It is possible to melt YSZ powder completely with near-IR fibre laser, and the relative density of 5 mm × 5 mm × 5 mm cubic sample is 88 per cent, and the micro-hardness could reach 1,209 ± 262 HV500. The influence of laser power on the volume deformation is more sensitive than the scanning speed at the same energy density. The small pores and the obvious orderly cracks can be observed in the cross-section of sample; the uneven distribution of laser energy input is the main reason of the formation of orderly cracks. The transformation from monoclinic and cubic crystal to tetragonal crystal occurred during the melting process. Heat treatment (1400°C for 30 min) cannot significantly improve the density of the sample, but it can restore the colour of ceramic. Research limitations/implications – Particularly serious due to the deformation of the ceramic material, the authors cannot prepare a large ceramic sample and measure its macroscopic mechanical properties. Originality/value – This paper describes the manufacture of YSZ ceramic sample by SLM technology with a 1 μm wavelength fibre laser, and preliminary studies show the microscopic structure, distribution of laser parameters and crystal transformation.

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