Effective Laser Sealing Enabled by Glass Thick Films Containing Carbon Black/Carbon Nanotubes |
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| Authors: | Oh Hyeon Kwon Bhaskar Chandra Mohanty Deuk Ho Yeon Jong‐Seok Yeo Kyoungho Lee Yong Soo Cho |
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| Affiliation: | 1. Department of Materials Science & Engineering, Yonsei University, , Seoul, 120‐749 Korea;2. School of Integrated Technology, Yonsei University, , Songdo, 406‐840 Korea;3. Department of Display Materials Engineering, Soonchunhyang University, , Asan, 336‐745 Korea |
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| Abstract: | An effective way of providing complete sealing of glass using an 810 nm diode laser was investigated for longer lifetime of glass panel‐based devices. Small amounts (<5 wt%) 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 1.0 wt% CB or 0.5 wt% CNT led to complete densification of glass with higher optical transmittance. Higher absorption coefficients calculated in the CNT case, e.g., ~536.4 cm?1 for the 0.5 wt% CNT sample compared to ~277.6 cm?1 for the 0.5 wt% CB sample, are believed to be responsible for the effective sealing even with a lower content of CNT. |
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