Glass powders and reactive silicone binder: Interactions and application to additive manufacturing of bioactive glass-ceramic scaffolds

3D Printing of Hierarchically Porous Lattice Structures Based on Åkermanite Glass Microspheres and Reactive Silicone Binder

“…(ii) they provide additional binding action, for un-sintered particles, at the burn-out of the organic compounds (at 500-600 °C), before high-temperature sintering; (iii) they contribute to the composition of the final ceramic [14,15]. Figure 2 confirms the feasibility of the fabrication of complex-shaped objects according to this approach.…”

“…Scaffolds fabricated using H62C silicone as binder additive, fired in the air, showed an additional peak centered at 2θ = 22 • attributed to the presence of silicone-derived crystalline SiO 2 [cristobalite, PDF #82-1014] (Figure 3c) [17]. Unlike in previous investigations on silicone/glass interaction [14,15], the resin and the glass microbeads did not chemically interact, and evolved independently. Additional evidence comes from the SEM images (Figure 4), showing that silica could act as a binder between adjacent microspheres.…”

“…The binding of particles, after firing, had to be provided by the ceramic residue of the silicone additive. Silicones can be considered as reactive binders, since (i) they can be mixed with organic solvents and photocurable resin; (ii) they provide additional binding action, for un-sintered particles, at the burn-out of the organic compounds (at 500–600 °C), before high-temperature sintering; (iii) they contribute to the composition of the final ceramic [ 14 , 15 ]. Figure 2 confirms the feasibility of the fabrication of complex-shaped objects according to this approach.…”

Robocasting of advanced ceramics: ink optimization and protocol to predict the printing parameters - A review

“…Ball milling for 4 h at 400 rpm was performed for ink homogenization. A more radical approach involved an ink based on MK (and a minor amount of FS) and ‘silica-defective glass’, denoted as WB-15, to form wollastonite/Ca-borate scaffolds with compressive strength of 16.9 ± 1.8 MPa, which was comparable to bone tissue [ 63 ]. The final phase assemblage was found to depend on the reaction between MK-derived silica and glass.…”

A review on the ceramic additive manufacturing technologies and availability of equipment and materials

“…Profs. Bernardo and Colombo have been leading research in the area, mostly using preceramic silicone as the binder [68][69][70][71][72][73][74] to create scaffolds made of a variety of ceramic and glass materials with potential application in bone tissue engineering applications.…”