Laser soldering of sapphire substrates using a BaTiAl6O12 thin-film glass sealant

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

doi:10.1016/j.optlastec.2016.02.008

Cited by 10 publications

(6 citation statements)

References 33 publications

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“…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%

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

Section: Introductionmentioning

confidence: 99%

“…23 In our previous works, different combinations of transparent materials and BTS-based thin films acting as sealants were investigated. [24][25][26][27][28] One of the novelties of those works was that the BTS glass sealant was employed as thin film (1-2 µm thickness) obtained from Pulsed Laser Deposition (PLD) process, and not as paste from glass powders (Table 1). In Ref.…”

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confidence: 99%

“…The employed set-up and analysis parameters are similar to our previous works. [24][25][26][27][28] Bonded samples were examined with an optical microscope (Leica DM RXE-650H). Fluorescence maps were recorded in the same optical microscope by locating an UV Lamp Camag (254 nm excitation wavelength with excitation density of 1.2 mW/cm 2 ) in front of the package.…”

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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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“…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%

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

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

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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“…Sapphire has been bonded to other materials like metals [13], including gold and silver [14], and alloys Inconel Ò through a Cu/Ni interlayer [12]. In our previous works, two sapphire substrates were laser-welded through a 50-nm titanium thin film [15], as well as through glass thin films [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Laser-Welded Steel Foils with Sapphire Substrates

Pablos-Martín

Große

Cismak

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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A nanosecond pulsed laser was used to weld stainless steel foils of 10 lm thickness to the sapphire substrates. The microstructure of the bonded interface was studied. Both materials were partially ablated under the influence of the laser beam. An inhomogeneous distribution of the steel and sapphire along the bonded interface is observed. The electrical resistance of the steel foil was measured before and after laser welding, showing that the weld slightly increases the electrical resistance but still keeps the values acceptable for electrical contacts

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