Effective Laser Sealing Enabled by Glass Thick Films Containing Carbon Black/Carbon Nanotubes
JOURNAL OF THE AMERICAN CERAMIC SOCIETY(2013)
摘要
An effective way of providing complete sealing of glass using an 810nm diode laser was investigated for longer lifetime of glass panel-based devices. Small amounts (<5wt%) of laser-absorbing materials such as carbon black (CB) or carbon nanotubes (CNT) were added to a bismuth zinc borate glass paste for instantaneous adhesion between glass substrates without interfacial cracks or severe pores. A higher laser power was required for a lower content of carbon for the laser-assisted sealing of glass. As optimal compositions, the addition of 1.0wt% CB or 0.5wt% CNT led to complete densification of glass with higher optical transmittance. Higher absorption coefficients calculated in the CNT case, e.g., similar to 536.4cm1 for the 0.5wt% CNT sample compared to similar to 277.6cm1 for the 0.5wt% CB sample, are believed to be responsible for the effective sealing even with a lower content of CNT.
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