Spray pyrolysis of yttria-stabilized zirconia nanoparticles and their densification into bulk transparent windows

Rudnicki, Christopher; Exarhos, Stephen; Mariano, Crystal A; Mangolini, Lorenzo

doi:10.1007/s11051-020-4766-0

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…However, transgranular fractures will occur when numerous dislocations are formed in the crystal grains . Our previous studies indicated that the CAPAD-processed 8YSZ disc had a hardness of 13.2 ± 0.1 GPa, whereas the SPS-processed 8YSZ_P disc showed a similar hardness of 13.9 ± 0.7 GPa, which suggested that the CAPAD and SPS processes may have limited effects on the hardness of YSZ discs.…”

Section: Discussionmentioning

confidence: 98%

“…The detailed synthesis method for YSZ nanoparticles via the in-house aerosol spray pyrolysis was described in our previous paper. , Specifically, anhydrous ZrCl 4 (Alfa Aesar) and YCl 3 ·6H 2 O (Sigma-Aldrich) were dissolved in deionized (DI) water to form the precursor solution, and varied ZrCl 4 :YCl 3 ratios were used to obtain YSZ nanoparticles with different Y 2 O 3 concentrations. The precursor solution was aerosolized using a 7000 standard cubic centimeters per minute (SCCM) argon (Ar) carrier gas flow through a six-jet collision-type nebulizer (BGI/Mesa Laboratories).…”

Section: Materials and Methodsmentioning

confidence: 99%

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Nanocrystalline Yttria-Stabilized Zirconia Ceramics for Cranial Window Applications

Uahengo

Rudnicki

et al. 2022

ACS Appl. Bio Mater.

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Transparent yttria-stabilized zirconia (YSZ) ceramics are promising for cranial window applications because of their good mechanical and optical properties as well as biocompatibility. YSZ discs with different yttria concentrations were either processed via current-activated pressure-assisted densification (CAPAD) using commercial nanoparticles or densified via spark plasma sintering (SPS) using pyrolysissynthesized nanoparticles in-house. This study provided critical results to screen composition, processing, microstructure, and cytocompatibility of transparent YSZ discs for cranial window applications. CAPAD-processed YSZ discs with 6 or 8 mol % yttria (6YSZ and 8YSZ) and SPS-densified YSZ discs with 4 mol % yttria (4YSZ_P) showed 200−350 nm polycrystalline grains containing 20−30 nm crystallite domains. SPS-densified YSZ discs with 8 mol % yttria (8YSZ_P) showed larger polycrystalline grains of 819 ± 155 nm with 29 ± 5 nm crystallite domains. CAPAD-processed YSZ discs with 3 mol % yttria (3YSZ) showed 39 ± 9 nm grains. Bone-marrow-derived stem cells (BMSCs) on the polished YSZ discs showed statistically higher spreading areas than those on the unpolished YSZ discs of the same compositions. Generally, polished 8YSZ, 4YSZ_P, and 8YSZ_P discs and unpolished 8YSZ_R, 4YSZ_PR, and 8YSZ_PR discs had lower average cell adhesion densities than other YSZ discs under direct contact conditions. Under indirect contact conditions, all the YSZ disc groups showed similar average cell adhesion densities to the Cell-only control. The groups of polished 4YSZ_P and 8YSZ_P discs, unpolished 4YSZ_PR and 8YSZ_PR discs, and particle control of 8YSZ_Pnp showed higher Y 3+ ion concentrations than other groups. No mineral deposition was detected on the polished YSZ discs after cell culture. Considering multiple factors such as cytocompatibility, cell adhesion density, Y 3+ ion release, mineral deposition, and optical transparency collectively, 8YSZ may be the best candidate for the cranial window applications. Further studies are needed to evaluate the long-term transparency and biocompatibility of YSZ discs.

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Section: Discussionmentioning

confidence: 98%

Section: Materials and Methodsmentioning

confidence: 99%