Sinter-crystallization of spodumene LAS glass-ceramic tiles processed by single-firing

Figueira, F. C.; Bernardin, Adriano Michael

doi:10.1016/j.jallcom.2019.06.107

Cited by 15 publications

(2 citation statements)

References 31 publications

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“…Depending of the method used to heat treat LAS glass-ceramic, similar structures can have different properties. The peak locations of the crystal phases of β-spodumene [41][42][43][44][45][46][47][48][49][50][51] and β-eucryptite [52] were close to 26º, which was also generally in agreement with other researchers' findings. It was discovered that the second phase of the crystal, virgilite (LiAlSi2O6), could be generated at either a lower [48] or higher [53] soaking temperature before it changed into β-spodumene.…”

Section: X-ray Diffraction Of β-Eucryptitesupporting

confidence: 89%

Design of alumina/β-eucryptite composite from alum sludge waste: physical properties, phase composition and coefficient of thermal expansion

Hegazy

Khattab

almaged

et al. 2023

Frontiers in Scientific Research and Technology

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The main objective of this research is to design alumina/β-eucryptite composite with a low coefficient of thermal expansion (CTE) and then test its sinterability using alum sludge from water treatment plants as an alumina source. A suitable chemical method is used to extract alumina from alum sludge waste. In addition to extracted alumina, silica fume waste and lithium carbonate were used to prepare β-eucryptite. In order to prepare β-eucryptite, the phase formation is first to be adjusted. The prepared samples were fired at 800, 1000, and 1200 ºC, respectively.XRD, SEM, physical properties, and thermal expansion are used to characterize these samples. The results indicate that 1000ºC is the optimum temperature for eucryptite formation. The samples of alumina/βeucryptite containing 10, 20, 30, and 40% eucryptite are then prepared, and the influence of the heat treatment on the prepared composites is studied at temperature ranges of 1300, 1400, and 1500ºC. XRD analysis, microstructure, physical, and mechanical properties of alumina/β-eucryptite composites are investigated. The coefficient of thermal expansion (CTE) for various alumina/β-eucryptite samples at 1500ºC reduces with increasing β-eucryptite content, reaching 0.8098 x 10 -6 o C -1 . The results demonstrate that a composite with good mechanical properties and a low thermal expansion coefficient can be formed and utilized in a variety of different applications.

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Section: X-ray Diffraction Of β-Eucryptitesupporting

confidence: 89%

Design of alumina/β-eucryptite composite from alum sludge waste: physical properties, phase composition and coefficient of thermal expansion

Hegazy

Khattab

almaged

et al. 2023

Frontiers in Scientific Research and Technology

View full text Add to dashboard Cite

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“…Figueira et al indicated the pronounced positive effect of reduced particle size in one step firing process (simultaneous sintering and crystallisation) [208]. Soares introduced non-isothermal crystallisation sintering of LAS glass powders [209].…”

Section: Low Thermal Expansion Glass Ceramicsmentioning

confidence: 99%

Lithium aluminosilicate (LAS) glass-ceramics: a review of recent progress

Venkateswaran

Sreemoolanadhan

Vaish

2021

International Materials Reviews

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The lithium aluminosilicate system (LAS) is being explored for almost seven decades due to its anomalous and attractive properties (especially low/negative thermal expansion and fast ion conduction) and its commercial significance in consumer as well as strategic sectors. This review introduces current commercial applications of LAS systems, necessary background science, structural features of different LAS crystal systems, including their polymorphs and solid-solutions, and the origin of unusual properties. Significant emphasis is provided on processing transparent, nanocrystalline, low thermal expansion glass-ceramic (LEGC), the role of chemical constituents and additives, the effect of heat-treatment, and microstructural evolution while processing LEGC. Detailed discussions are provided on the following areas: LAS matrix composites, chemical strengthening of glass and glass-ceramic, low temperature co-fired ceramics (LTCC) and associated joining technologies (hydrolysis catalysis bonding, anodic bonding, brazing, etc.) that would further extend the application portfolio of LAS system.

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Advancing High‐Power Laser Lighting: Designing a Novel YAGG:Ce Color Converter in Li–Al–Si Glass Ceramic

Zheng,

Liu,

Liang

et al. 2024

Laser & Photonics Reviews

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In laser illumination, there is considerable interest in phosphor‐converted laser diodes that boast high efficiency and exceptional thermal stability. Phosphor‐in‐glass (PiG) and phosphor‐in‐glass film (PiF) are highly favored for their efficiency, cost‐effectiveness, and ease of fabrication. To tackle the issue of low thermal conductivity of glass, a novel lithium–aluminum–silicate glass is innovatively developed. This glass induces the precipitation of spodumene crystalline phase, enhancing material stability. Utilizing solid‐state sintering techniques, Y3Al3.5Ga1.5O12:Ce3+ (YAGG:Ce) PiG is fabricated, which exhibited a luminous flux (LF) of 866.76 lm under 450 nm blue light with 3.88 W input power. Benefiting from the high thermal conductivity of sapphire substrate and the high‐intensity glass system, YAGG:Ce PiF demonstrated a saturation threshold of 10.20 W, yielding an impressive LF of 2178.1 lm, which is 2.5 times that of PiG samples. Notably, the thermal conductivity increased significantly from 2.2 W m−1K−1 (PiG) to 7.0 W m−1K−1 (PiF), surpassing traditional organic resin materials. To validate the practicality of the two‐color converters, it integrates them into both starlight lamp and laser flashlight modules for encapsulation, thereby generating attractive green light in various environments. This design holds the potential to become the ideal choice for the next generation of high‐power, high‐brightness laser illumination.

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Sinter-crystallization of spodumene LAS glass-ceramic tiles processed by single-firing

Cited by 15 publications

References 31 publications

Design of alumina/β-eucryptite composite from alum sludge waste: physical properties, phase composition and coefficient of thermal expansion

Design of alumina/β-eucryptite composite from alum sludge waste: physical properties, phase composition and coefficient of thermal expansion

Lithium aluminosilicate (LAS) glass-ceramics: a review of recent progress

Advancing High‐Power Laser Lighting: Designing a Novel YAGG:Ce Color Converter in Li–Al–Si Glass Ceramic

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