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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
Effect of Glass Powder Size on Leucite Glass-Ceramic Crystallisation
Abstract
Objectives: The aims of the study were to explore the effect of glass powder size on leucite glass-ceramic crystallisation. Methods: Glasses were designed using Appen Factors, synthesised and attritor milled sequentially for up to 8 hours. Glasses were characterised using Particle Size Analysis, Dilatometry, Differential Scanning Calorimetry (DSC), High Temperature X-ray Diffraction (HTXRD) and Inductively Coupled Plasma - Mass Spectrometry (ICP-MS). Two-step heat treatments were carried out to investigate the leucite glass-ceramic crystallisation. Disc specimens (14mm diameter x 2mm thickness) were fabricated by heat pressing or sintering. Experimental and control (Empress Esthetic (EA)) specimens were tested using the Biaxial Flexural Strength (BFS, ball on ring) test at a crosshead speed of 1mm/min. The microstructures were viewed using Secondary Electron Microscopy (SEM). Results: Attritor milling reduced glass powder size (D50) from 11.37 µm (starting glass, SG) to 0.45 µm (8 hour milled, 8HM). Tetragonal leucite was detected in all crystalline glass-ceramics. Glass milling and heat treatment produced a reduction in leucite crystal size, Mean (SD) SG: 0.99 (0.59) µm2 to 8HM: 0.16 (0.10) µm2. The EA crystal size was 1.7 (2.0) µm2. The leucite crystal number increased from 558 (SG) to 3378 (8HM). The glass-ceramic thermal expansion coefficient (100-400ºC) was: 19.0 x10-6/K (SG) and 17.2 x10-6/K (8HM). The mean biaxial flexural strength MPa (SD) of the test groups was SG: 153.2 (21.7), 4HM (4 hour milled) 252.4 (38.7), 8HM: 219.5 (54.1) and EA: 165.5 (30.6). The glass-ceramic 4HM and 8HM had a higher BFS and characteristic strength than the other reported test groups (P < 0.05), however there was no significant difference between BFS values for SG and EA (P > 0.05). Conclusion: A relationship between the glass powder size and the leucite crystal size and number was established. High strength fine grained leucite glass-ceramics were produced.