Fig. 1. Curves of thermal expansion coefficient for glass

Fig. 2. SEM image of glass powder granule

Fig. 3. Sealing glass preforms prepared by selective laser sintering

Fig. 4. Binder removing and presintering curve for preforms

Fig. 5. SEM images of samples with different PS contents after presintering. (a) Mass fraction of 20%; (b) mass fraction of 30%

Fig. 6. Photos of sealing glass preforms. (a) After laser sintering; (b) after thermal sintering; (c) after sealing with Kovar pins