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

Marcomini, Raphael Fortes; Souza, Dulcina Maria Pinatti Ferreira de

doi:10.1590/1980-5373-mr-2015-0161

Cited by 7 publications

(2 citation statements)

References 23 publications

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“…The Raman spectrum taken from the reference sample (Figure ) is a good match to YSZ Raman data published elsewhere . Residual stresses in a material will cause a frequency shift in the Raman mode.…”

Section: Discussionsupporting

confidence: 64%

Mechanically inspired laser scribing of thin brittle materials

et al. 2017

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Laser processing of thin flexible ceramics and glasses is challenging due to the incurred brittleness and unfavorable thermal and optical properties of such materials. We describe an alternative laser cutting method which utilizes surface stress raisers to cleave brittle substrates along a defined path. An ultrashort laser source is used to precisely pattern a plurality of aligned elliptical recesses on the material surface. The apex of an ellipse concentrates applied tensile stresses. Depending on the elliptical dimensions, the achievable stress concentration factor can be up to 50. The orientation of the ellipses defines a preferred scribing path. The technique was successfully applied to thin flexible yttria stabilized zirconia ceramic and borosilicate glass substrates. The form and properties of the material play an important role during the fracture process. Polycrystalline ceramics were found to accurately auto cleave along the path due to stresses produced during the laser ablation. The resulting fractured surface is of higher quality and strength than surfaces cut using full body laser cutting techniques, while the crystalline phase is preserved. The optical setup is simple, low cost, and compatible with roll-to-roll manufacturing. K E Y W O R D Sbioceramics, borosilicate glass, fracture, lasers processing, zirconia: yttria stabilized

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Section: Discussionsupporting

confidence: 64%

Mechanically inspired laser scribing of thin brittle materials

et al. 2017

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“…High deposition temperature and lower oxygen partial pressure resulted in dense microstructure and less dense at increasing oxygen partial pressure. Dense microstructure thin film has high oxygen ion conductivity while porous thin films have low oxygen ion conductivity but have high protonic conductivity [25,31,32]. For scandium and yttrium co-doped zirconia or ScYSZ thin films, very limited information or none so far has been reported on the effects of PLD deposition parameters on the properties of ScYSZ solid electrolyte thin films.…”

Section: Introductionmentioning

confidence: 99%

Effects of Oxygen Partial Pressure and Substrate Temperature on the Structure and Morphology of Sc and Y Co-Doped ZrO2 Solid Electrolyte Thin Films Prepared via Pulsed Laser Deposition

et al. 2022

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Scandium (Sc) and yttrium (Y) co-doped ZrO2 (ScYSZ) thin films were prepared on a SiO2-Si substrate via pulsed laser deposition (PLD) method. In order to obtain good quality thin films with the desired microstructure, various oxygen partial pressures (PO2) from 0.01 Pa to 10 Pa and substrate temperatures (Ts) from 25 °C to 800 °C were investigated. X-ray diffraction (XRD) patterns results showed that amorphous ScYSZ thin films were formed at room substrate temperature while cubic polycrystalline thin films were obtained at higher substrate temperatures (Ts = 200 °C, 400 °C, 600 °C, 800 °C). Raman spectra revealed a distinct Raman shift at around 600 cm−1 supporting a cubic phase. However, a transition from cubic to tetragonal phase can be observed with increasing oxygen partial pressure. Photoemission spectroscopy (PES) spectra suggested supporting analysis that more oxygen vacancies in the lattice can be observed for samples deposited at lower oxygen partial pressures resulting in a cubic structure with higher dopant cation binding energies as compared to the tetragonal structure observed at higher oxygen partial pressure. On the other hand, dense morphologies can be obtained at lower PO2 (0.01 Pa and 0.1 Pa) while more porous morphologies can be obtained at higher PO2 (1.0 Pa and 10 Pa).

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