In illustrative implementations of this invention, a crucible kiln heats glass such that the glass becomes or remains molten. A nozzle extrudes the molten glass while one or more actuators actuate movements of the nozzle, a build platform or both. A computer controls these movements such that the extruded molten glass is selectively deposited to form a 3D glass object. The selective deposition of molten glass occurs inside an annealing kiln. The annealing kiln anneals the glass after it is extruded. In some cases, the actuators actuate the crucible kiln and nozzle to move in horizontal x, y directions and actuate the build platform to move in a z-direction. In some cases, fluid flows through a cavity or tubes adjacent to the nozzle tip, in order to cool the nozzle tip and thereby reduce the amount of glass that sticks to the nozzle tip.

In illustrative implementations of this invention, a crucible kiln heats glass such that the glass becomes or remains molten. A nozzle extrudes the molten glass while one or more actuators actuate movements of the nozzle, a build platform or both. A computer controls these movements such that the extruded molten glass is selectively deposited to form a 3D glass object. The selective deposition of molten glass occurs inside an annealing kiln. The annealing kiln anneals the glass after it is extruded. In some cases, the actuators actuate the crucible kiln and nozzle to move in horizontal x, y directions and actuate the build platform to move in a z-direction. In some cases, fluid flows through a cavity or tubes adjacent to the nozzle tip, in order to cool the nozzle tip and thereby reduce the amount of glass that sticks to the nozzle tip.

The present disclosure relates to an antibacterial glass composition and a manufacturing method thereof. The antibacterial glass composition according to the present disclosure comprises: 20-45 wt % of SiO.sub.2; 1-30 wt % of B.sub.2O.sub.3; 10-30 wt % of ZnO; 5-25 wt % of one or more of Na.sub.2O, K.sub.2O and Li.sub.2O; 0.1-10 wt % of one or more of Al.sub.2O.sub.3 and TiO.sub.2; 0.1-5 wt % of NaF; and 1-10 wt % of one or more of Co.sub.3O.sub.4, CuO and Fe.sub.2O.sub.3, thereby causing no deterioration in durability and ensuring excellent antibacterial activity.

The present disclosure relates to an antibacterial glass composition and a manufacturing method thereof. The antibacterial glass composition according to the present disclosure comprises: 20-45 wt % of SiO.sub.2; 1-30 wt % of B.sub.2O.sub.3; 10-30 wt % of ZnO; 5-25 wt % of one or more of Na.sub.2O, K.sub.2O and Li.sub.2O; 0.1-10 wt % of one or more of Al.sub.2O.sub.3 and TiO.sub.2; 0.1-5 wt % of NaF; and 1-10 wt % of one or more of Co.sub.3O.sub.4, CuO and Fe.sub.2O.sub.3, thereby causing no deterioration in durability and ensuring excellent antibacterial activity.