A novel green nonaqueous sol-gel process for preparation of partially stabilized zirconia nanopowder

Feng, Guo; Jiang, Weihui; Liu, Jianmin; Zhang, Quan; Wu, Qian; Liu, Miao

doi:10.2298/pac1703220f

Cited by 11 publications

(6 citation statements)

References 19 publications

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“…Agglomeration is also a drawback of this method. A modified, nonaqueous sol-gel process has been recently proposed as a novel green method for the preparation of highly dispersive 3 mol% yttria-stabilized zirconia nanopowder with particle sizes of 15–25 nm [19]. In the solution combustion synthesis , different types of organic fuels (i.e.…”

Section: Factors Affecting Strength and Aging Resistance Of Monolithimentioning

confidence: 99%

Strength and aging resistance of monolithic zirconia: an update to current knowledge

Kontonasaki

Giasimakopoulos

Rigos

2020

Japanese Dental Science Review

134

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New zirconia compositions with optimized esthetic properties have emerged due to the fast-growing technology in zirconia manufacturing. However, the large variety of commercial products and synthesis routes, make impossible to include all of them under the general term of “monolithic zirconia ceramics”. Ultra- or high translucent monolithic formulations contain 3–8 mol% yttria, which results in materials with completely different structure, optical and mechanical properties. The purpose of this study was to provide an update to the current knowledge concerning monolithic zirconia and to review factors related to strength and aging resistance. Factors such as composition, coloring procedures, sintering method and temperature, may affect both strength and aging resistance to a more or less extend. A significant reduction of mechanical properties has been correlated to high translucent zirconia formualtions while regarding aging resistance, the findings are contradictory, necessitating more and thorough investigation. Despite the obvious advantages of contemporary monolithic zirconia ceramics, further scientific evidence is required that will eventually lead to the appropriate laboratory and clinical guidelines for their use. Until then, a safe suggestion should be to utilize high-strength partially-stabilized zirconia for posterior or long span restorations and fully-stabilized ultra-translucent zirconia for anterior single crowns and short span fixed partial dentures.

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Section: Factors Affecting Strength and Aging Resistance Of Monolithimentioning

confidence: 99%

Strength and aging resistance of monolithic zirconia: an update to current knowledge

Kontonasaki

Giasimakopoulos

Rigos

2020

Japanese Dental Science Review

134

View full text Add to dashboard Cite

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“…The basic advantage of colloidal processes compared to dry-pressing is the higher homogeneity and density of the green compact that presents less intergranular voids' inclusion [34]. Higher density is usually associated with improved mechanical performance [35] due to a lack of internal flaws that act as fracture initiators. Group A ceramics were sintered at 1580°C for 2.5 hours and group B at 1450°C for 2 hours.…”

Section: Discussionmentioning

confidence: 99%

The effect of different aging protocols on the flexural strength and phase transformations of two monolithic zirconia ceramics

Kelesi

Kontonasaki

Kantiranis

et al. 2020

Journal of Applied Biomaterials & Functional Materials

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Introduction: The aim of the present study was to investigate how different aging protocols can affect the flexural strength and phase transformations of yttrium-stabilized zirconia ceramics (Y-TZP) for monolithic restorations. Materials and methods: Bar-shaped specimens from two zirconia ceramics bars were divided into three groups: a. no treatment (c), b. aging in an autoclave (a), and c. thermal cycling (t). The flexural strength was determined by the 3-point bending test and statistical analysis was performed to determine significant differences ( p< 0.05). Weibull statistics was used to analyze the dispersion of strength values while surface microstructural analysis was performed through X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Results: Aging did not significantly affect the flexural strength but differences were recorded between the two groups, with group A presenting higher strength values and m-phase percentages. Conclusions: The observed differences between the two ceramics could be attributed to variations in composition and processing.

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“…2 Zirconia has been synthesized by different methods, such as combustion synthesis, ion exchange, solid-state reaction, solgel synthesis, glycothermal processing, Pechini method, and a wet chemical method. 3,4 Zirconium dioxide (ZrO 2 ) is a ceramic material that has become attractive due to its mechanical, thermal, and chemical properties and is becoming also very important as reinforcement in polymer matrix composites. 5 It may be used in transparent optical devices, 6 electrochemical capacitor electrodes, oxygen sensors, 7 fuel cells 8 as catalyst support 9 and as a biomaterial.…”

Section: Introductionmentioning

confidence: 99%

“…2 Zirconia has been synthesized by different methods, such as combustion synthesis, ion exchange, solid-state reaction, sol-gel synthesis, glycothermal processing, Pechini method, and a wet chemical method. 3,4…”

Section: Introductionmentioning

confidence: 99%

Salt template zirconia reinforcing particles as possible reinforcement for PMMA matrix composite

Elmadani

Tomić

Radović

et al. 2019

Advanced Composites Letters

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To obtain flakes like zirconia particles at relatively low temperature, the synthesis method for producing zirconia particles on the surface of salt particles that serve as a template is examined. The produced particles are incorporated as reinforcement in the poly(methyl methacrylate) matrix to obtain a composite material. The particles were characterized by the X-ray diffraction, Fourier-transform infrared spectroscopy, and image analysis. The morphology of the particles and composites was examined using a field emission scanning electron microscope. Composites prepared with synthesized particles were compared to those containing commercial zirconia particles to estimate the possibility of use of synthesized particles as reinforcement. The influence of the 1 wt% of zirconia particles in composite material on the mechanical properties was studied using microhardness measurements and dynamic mechanical analysis. The results obtained show that the addition of 1 wt% of zirconia particles increases the mechanical properties of the composite relative to the pure polymer matrix.

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A novel green nonaqueous sol-gel process for preparation of partially stabilized zirconia nanopowder

Cited by 11 publications

References 19 publications

Strength and aging resistance of monolithic zirconia: an update to current knowledge

Strength and aging resistance of monolithic zirconia: an update to current knowledge

The effect of different aging protocols on the flexural strength and phase transformations of two monolithic zirconia ceramics

Salt template zirconia reinforcing particles as possible reinforcement for PMMA matrix composite

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