Highly translucent and strong ZrO2-SiO2 nanocrystalline glass ceramic prepared by sol-gel method and spark plasma sintering with fine 3D microstructure for dental restoration

Fu, Le; Engqvist, Håkan; Xia, Wei

doi:10.1016/j.jeurceramsoc.2017.05.039

Cited by 60 publications

(74 citation statements)

References 40 publications

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“…Despite the great acceptance and broad use of LD glass-ceramics, the evolution of new dental materials has attempted to develop glass-ceramic with higher mechanical strength and higher translucency. In the last few years, we developed a strong and highly-translucent ZrO 2 -SiO 2 nanocrystalline glass-ceramics [33,67]. In the glass-ceramics ZrO 2 nanoparticles (NPs) are homogeneously embedded in an amorphous SiO 2 matrix (Figure 9a,b).…”

Section: Newly Developed Glass-ceramic: Zro 2 -Sio 2 Nanocrystalline mentioning

confidence: 99%

“…The average flexural strength of 35%ZrO 2 -65%SiO 2 glass-ceramic is 268 MPa [33]. The strength increases with the increase of ZrO 2 content in the glass-ceramics, reaching as high as 1014 MPa for 65%ZrO 2 -35%SiO 2 glass-ceramic [67]. The ZrO 2 -SiO 2 glass-ceramics shows great potential to be used in dental restoration.…”

Section: Newly Developed Glass-ceramic: Zro 2 -Sio 2 Nanocrystalline mentioning

confidence: 99%

“…According to the model proposed by Selsing [80], the coefficient of thermal expansion (CTE) of the crystalline phase is larger than that of the glass phase. The thermal residual stress field in the glass-ceramic consists of two regions: the tensile stress region (represented by red color) in the crystalline phase and the compressive region (represented by yellow color) in the matrix [67,81], as schematically shown in Figure 11b. A propagating crack will deviate from the crystalline phase, resulting in crack deflection and fracture resistance improvement (Figure 11b).…”

Section: Thermal Residual Stressmentioning

confidence: 99%

“…As mentioned in Section 6, we developed a new ZrO 2 -SiO 2 nanocrystalline glass-ceramic system, among which 65%ZrO 2 -35%SiO 2 (mol%) glass-ceramic achieved a flexural strength of as high as 1014 MPa [67]. To address the underlying strengthening mechanism, we characterized the 65%ZrO 2 -35%SiO 2 (mol%) glass-ceramic with STEM [83].…”

Section: Strengthening By 3d Nanoarchitecturementioning

confidence: 99%

“…Amorphous SiO 2 matrix show dark contrast. Reprinted from Ref[33] and Ref[67]. (c) Optical images and the average flexural strength of the sintered ZrO 2 -SiO 2 nanocrystalline glass-ceramics.…”

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confidence: 99%

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Glass–Ceramics in Dentistry: A Review

2020

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In this review, we first briefly introduce the general knowledge of glass–ceramics, including the discovery and development, the application, the microstructure, and the manufacturing of glass–ceramics. Second, the review presents a detailed description of glass–ceramics in dentistry. In this part, the history, property requirements, and manufacturing techniques of dental glass–ceramics are reviewed. The review provided a brief description of the most prevalent clinically used examples of dental glass–ceramics, namely, mica, leucite, and lithium disilicate glass–ceramics. In addition, we also introduce the newly developed ZrO2–SiO2 nanocrystalline glass–ceramics that show great potential as a new generation of dental glass–ceramics. Traditional strengthening mechanisms of glass–ceramics, including interlocking, ZrO2–reinforced, and thermal residual stress effects, are discussed. Finally, a perspective and outlook for future directions in developing new dental glass–ceramics is provided to offer inspiration to the dental materials community.

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Section: Newly Developed Glass-ceramic: Zro 2 -Sio 2 Nanocrystalline mentioning

confidence: 99%

Section: Newly Developed Glass-ceramic: Zro 2 -Sio 2 Nanocrystalline mentioning

confidence: 99%

Section: Thermal Residual Stressmentioning

confidence: 99%

Section: Strengthening By 3d Nanoarchitecturementioning

confidence: 99%

mentioning

confidence: 99%

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Glass–Ceramics in Dentistry: A Review

2020

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Formation of Chemically Complex Intergranular Glass Film: An Effective Strategy to Hinder Grain Coarsening

Fu,

Lei,

et al. 2024

Adv Eng Mater

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Thermally driven grain coarsening is a commonly encountered issue in nanocrystalline ceramics, particularly in high‐temperature environments. The intergranular glass film (IGF) constitutes a crucial component of most ceramics and plays a pivotal role in the process of grain coarsening. In this study, it is proposed to impede grain coarsening by constructing a chemically complex IGF comprising multiple dopants with distinct ionic radii. Ternary dopants encompassing Al3+, Y3+, and La3+ ions are simultaneously incorporated into a ZrO2–SiO2 nanocomposite. To fabricate the nanocomposite, an amorphous precursor powder with uniformly dispersed dopants is prepared using a chemical coprecipitation method, followed by rapid hot pressing to obtain a dense bulk sample. The distribution behavior of ternary dopants at IGFs between adjacent ZrO2 nanocrystallites (NCs) is carefully examined. It is revealed that the ternary dopants coexist at the IGFs. Moreover, Si4+ ions exhibit preferential enrichment at the IGFs. Remarkably, the presence of chemically complex IGFs significantly enhances the resistance to grain coarsening in ZrO2 NCs up to 1000 °C. In these findings, valuable insights are offered for designing and fabricating nanocomposites with exceptional resistance against grain coarsening.

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Zirconia‐containing glass‐ceramics: From nucleating agent to primary crystalline phase

Shearer,

Montazerian,

Deng

et al. 2024

Int J Ceramic Engine & Sci

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This article reviews promising studies on the design, manufacturing, microstructure, properties, and applications of glass‐ceramics containing ZrO2 and relevant glass‐ceramic matrix composites. After the addition of ZrO2 to a glass‐ceramic composition, it can persist in the residual glassy phase, facilitate nucleation, and/or precipitate as ZrO2 or another zirconate crystalline phase. Also, ZrO2‐reinforced or ZrO2‐toughened glass‐ceramics can be designed as composites. In this article, the term “ZrO2‐containing glass‐ceramics” encompasses all these scenarios in which ZrO2 is present. Such glass‐ceramics offer a wide range of applications in modern industries, including but not limited to architecture, optics, dentistry, medicine, and energy. Since S. Donald Stookey's discovery of glass‐ceramics in the early 1950s, the most important scientific efforts reported in the literature are reviewed. ZrO2 is commonly added to glass‐ceramics to promote nucleation. As a result, the role of ZrO2 in structural modification of residual glass and stimulating the nucleation in glass‐ceramic is first discussed. ZrO2 can also be designed into the main crystalline phase of glass‐ceramics, contributing achieving super high fracture toughness above 4 MPa·m0.5. Experimental and computational studies are reviewed in detail to elucidate how the transformation toughening and other mechanisms help to achieve such high values of fracture toughness. Sintered and glass‐ceramic matrix composites also show promise, where ZrO2 contributes to improved stability and mechanical properties. Finally, we hope this article will provoke interest in glass‐ceramic materials in both the scientific and industrial communities so that their tremendous technological potential in developing, for example, tough, thermally stable, transparent, and biologically compatible materials can be realized more widely.

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Highly translucent and strong ZrO2-SiO2 nanocrystalline glass ceramic prepared by sol-gel method and spark plasma sintering with fine 3D microstructure for dental restoration

Cited by 60 publications

References 40 publications

Glass–Ceramics in Dentistry: A Review

Glass–Ceramics in Dentistry: A Review

Formation of Chemically Complex Intergranular Glass Film: An Effective Strategy to Hinder Grain Coarsening

Zirconia‐containing glass‐ceramics: From nucleating agent to primary crystalline phase

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