The Effect of 5 wt %Yettria-Stabilized Zirconia on Crystallized Glass-Ceramic System at Different Temperature

SUMMARY The aim of this study was to determine whether using a silane-containing universal adhesive as a silane primer in glass-ceramic/resin cement systems affects biaxial flexural strength (BFS) and bonded interface integrity after loading. Glass-ceramic (IPS e.max CAD, Ivoclar/Vivadent, Schaan, Liechtenstein) disc-shaped specimens (6.5±0.1mm in diameter, 0.5±0.1mm thick) were etched with 5% hydrofluoric acid (HF) for 20 seconds and divided into four groups of 30 specimens, to be treated as follows: 1) One bottle silane primer (RCP); 2) Separate application of silane and adhesive (RCP+SB); 3) Silane-containing universal adhesive (SBU); 4) No treatment (C). After silanization, all specimens were resin cement– coated and polymerized for 40 seconds. Each specimen layer was measured, as well as each assembly's thickness, using a digital caliper and scanning electron microscope (SEM). Specimens were stored for 24 hours and submitted to a BFS test (1.27 mm/min). BFS values were calculated using the bilayer disc-specimen solution. Bonded interfaces were analyzed on fractured fragments using SEM. One-way ANOVA and Tukey tests (α=0.05) were applied, as well as the Weibull analysis. Factor “silane treatment” was statistically significant (p<0.0001). RCP+SB (372.2±29.4 MPa) and RCP (364.2±29.5 MPa) produced significantly higher BFS than did the C (320.7±36.3 MPa) or SBU (338.0±27.1 MPa) groups. No differences were found in the Weibull modulus (m: RCP: 10.1-17.3; RCP+SB: 10.1-17.0; SBU: 12.3-22.4; C: 7.4-12.9). Bonded interface analysis exhibited ceramic-cement separation (SBU, C) and voids within the resin cement layer (all groups). Neither the ceramic/cement system's BFS nor its bonded interface stability were improved by SBU after loading.

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Thermal and structural characterization of the Bi2-x Smx Sr2 Ca2 Cu3 O10+δ glass-ceramic system

International Journal of Applied Glass Science ◽

10.1111/ijag.12257 ◽

2016 ◽

Vol 8 (3) ◽

pp. 344-351 ◽

Cited By ~ 2

Author(s):

Olcay Kizilaslan ◽

Gokhan Kirat ◽

Mehmet Ali Aksan

Keyword(s):

Structural Characterization ◽

Glass Ceramic ◽

Ceramic System

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Experimental Glass-Ceramic Products to Immobilize ICPP HLW

MRS Proceedings ◽

10.1557/proc-112-53 ◽

1987 ◽

Vol 112 ◽

Author(s):

Roseanne S. Baker ◽

Bruce A. Staples ◽

Dieter A. Knecht ◽

Julius R. Berreth

Keyword(s):

Glass Ceramic ◽

Hot Isostatic Pressing ◽

Glass Ceramics ◽

High Level Waste ◽

Processing Plant ◽

Chemical Processing ◽

Stabilized Zirconia ◽

Experimental Glass ◽

Ceramic Glass ◽

High Level

AbstractCandidate products are being evaluated to immobilize the routinely calcined waste at the Idaho Chemical Processing Plant (ICPP). A potential product with minimal volume for immobilizing ICPP high-level waste (HLW) for final disposal is a high-waste-loading and high-density glass-ceramic. Glass-ceramics are formed by Hot Isostatic Pressing (HIPing) the HLW with selected additives, such as SiO2, B2O3, Li2O, Na2O, and Y2O3. Glass-ceramic products have been formed with calcine loa ings up to 80 wt% and densities up to 3.4 g/cm3. Crystalline phases observed in the glass-ceramic products include calcium fluoride, monoclinic and cubic zirconia, calcium- and yttrium-stabilized zirconia, and zircon. An interstitial amorphous phase also exists consisting of the oxides of silicon, aluminum, boron, and alkalis. The glass-ceramic waste forms give leach rates comparable to simulated HLW glass products.

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