Laser-welded fused silica substrates using a luminescent fresnoite-based sealant

Martín, A.; Benndorf, G.; Tismer, S.; Mittag, M.; Cismak, A.; Lorenz, Michael; Grundmann, Marius; Höche, Thomas

doi:10.1016/j.optlastec.2016.01.020

Cited by 13 publications

(15 citation statements)

References 20 publications

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“…Thus, the laser beam goes through it and efficiently deposits thermal energy in the BTS.xSiO 2 (x = 2, 3) interface (Figure A). In comparison with previous works on BTS‐glass thin film sealant, the enrichment in SiO 2 was performed to better fit the CTE requirements. The difference in CTEs of silica glass and sapphire is one order of magnitude, being 0.55.10 −6 and 6.10 −6 K −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The focus position was corrected taking into account the shift of focal length when passing across a material . A wobble beam trajectory was used . Optimized laser parameters of both, BTS.2SiO 2 and BTS.3SiO 2 glass sealant systems are displayed in Table .…”

Section: Methodsmentioning

confidence: 99%

“…For acoustic coupling, the samples were submerged in de‐ionized and degassed water at 21°C. The employed set‐up and analysis parameters are similar to our previous works …”

Section: Methodsmentioning

confidence: 99%

“…The tensile stress of three selected bonded samples were determined, following the same procedure as in Ref. (24). A tensile load perpendicular to the bonded area was applied with 1 mm/s displacement rate.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous works, different combinations of transparent materials and BTS‐based thin films acting as sealants were investigated ).…”

Section: Introductionmentioning

confidence: 99%

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Processing technologies for sealing glasses and glass‐ceramics

Pablos-Martín

Rodríguez-López

Pascual

2020

Int J of Appl Glass Sci

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This paper embraces two different approaches for the joining of materials through glass sealants. First, the conventional method of furnace sealing in which paste technology is normally employed. The glass sealant is applied in powder form mixed with agglomerant and with the help of dispenser robots, tape casting, or screen printing. Glass-ceramics for sealing of solid oxide fuel cells (SOFC) are described as an example of this type of processing. Glass composition, thermal properties, particle size of the glass powder, sintering and crystallization competition, and final crystalline phases together with a suitable chemical compatibility with the metallic and ceramic elements to be sealed need to be carefully adjusted for this specific application. Second, laser welding is presented as an alternative sealing technology. A general overview about laser welding through glass sealants is presented. Particularly, the welding of sapphire and fused silica glass through a BTS.2SiO 2 thin film glass sealant by employment of a nanosecond-pulsed laser is detailed. Laser parameters (frequency, power, scan speed, and number of passes) were optimized to get the best molten conditions of the BTS thin film, while allowing its crystallization. BTS crystallization upon laser welding leads to a strong blue emission upon UV excitation. Finally, both processing technologies were compared. K E Y W O R D Sadherence, crystallization, fresnoite, furnace sealing, glass-ceramics, laser welding, sinteringThis is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…For acoustic coupling, the samples were submerged in de‐ionized and degassed water at 21°C. The employed set‐up and analysis parameters are similar to our previous works …”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…In our previous works, different combinations of transparent materials and BTS‐based thin films acting as sealants were investigated ).…”

Section: Introductionmentioning

confidence: 99%

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