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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chen, Xiaohui
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2022Effect of sandblasting with fluorapatite glass-ceramic powder and chemical primers/adhesives on shear bond strength of indirect repairing composite to zirconiacitations
- 2020Fluorapatite Glass-Ceramics: A New Sandblasting Approach for Zirconia Repair
- 2019Preliminary study of hydroxyapatite particles air abrasive blasting on Mg-4Zn-0.3Ca surfacecitations
- 2016Design and Synthesis of New Translucent, High Strength Leucite Glass-Ceramics
- 2016Surface properties of tricalcium phosphate and hydroxyapatite resin composites
- 2014Leucite Glass Ceramics
- 2014The Retarding Effect of Zinc Oxide on Dissolution and Apatite Formation of a Fluoride Containing Bioactive Glass
- 2014'Smart' acid-degradable zinc-releasing silicate glassescitations
- 2014Low-sodium Bioactive Glass Coatings for Titanium Implants by Grit Blasting
- 2013Remineralisation Study of a Nano-sized Hydroxyapatite and Fluoride Containing Toothpaste
- 2013Reduced wear of enamel with novel fine and nano-scale leucite glass-ceramicscitations
- 2013Crystallization of high-strength nano-scale leucite glass-ceramicscitations
- 2012Wear characteristics of fine and nano-scale high-strength leucite glass-ceramics
- 2011Crystallization and flexural strength optimization of fine-grained leucite glass-ceramics for dentistrycitations
- 2010Development and testing of multi-phase glazes for adhesive bonding to zirconia substrates
- 2010Crystallization of high-strength fine-sized leucite glass-ceramicscitations
- 2010Synthesis of nano-sized Leucite Glass-ceramics
- 2010Wear Characteristics of an Experimental High-Strength Fine-Sized Leucite Glass-Ceramic
- 2010Optimization of Novel Leucite Glass-ceramics
- 2009Effect of Glass Powder Size on Leucite Glass-Ceramic Crystallisation
- 2009Control of ceramic microstructure
- 2007Microstructure and Thermal Expansion Properties of Some Leucite Glass-Ceramics
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conferencepaper
Optimization of Novel Leucite Glass-ceramics
Abstract
Objectives: The aims of the study were to optimize the crystallization and heat extrusion of novel leucite glass-ceramics.Methods: Glass was designed, synthesized and attritor milled into powders. The glass powder A was characterised using Differential Scanning Calorimetry and High Temperature X-ray Diffraction (HTXRD). Nucleation and crystal growth experiments were carried out to optimize two-step crystallization heat treatments. The crystallized phases were identified using room temperature X-ray Diffraction and the microstructures were viewed using Secondary Electron Microscopy. Disc specimens (14x2mm) were fabricated by heat pressing or sintering. The thermal expansion coefficient (TEC) was measured using Dilatometry. Experimental and IPS Empress Esthetic (EA) glass-ceramic specimens (n=30) were tested using the Biaxial Flexural Strength (BFS, ball on ring) test at a crosshead speed of 1mm/min.Results: HTXRD showed phase changes of glass A with increasing temperature and tetragonal leucite was found in all test glass-ceramics. Experimental glass-ceramics showed fine and evenly distributed leucite crystals. Optimized Leucite glass-ceramic crystallization produced a reduction in leucite crystal size to a Mean (SD) of 0.15(0.09)µm2. The glass-ceramic TEC (x10-6.K-1, 100-400ºC) was; A: 18.2, Aopt (optimized glass-ceramic A): 18.8, heat extruded Aopt: 19.7 and EA: 16.7. The BFS test and Weibull analysis results of the test groups were given in the following Table, where different superscript letters indicate significant differences between groups (p<0.05).Glass-CeramicsMean BFS (SD) (MPa)Weibull mCharacteristic Strength (MPa)A253.8 (53.3)a5.4a274.9aAopt252.4 (38.7)a8.7bc266.2aHeat Extruded Aopt245.0 (24.3)a11.9b255.5aHeat Extruded EA165.5 (30.6)b6.3ac177.5bConclusions: Optimized crystallization of novel leucite glass-ceramics produced high strength and reliable extruded leucite glass-ceramics.