A glass filler of the present disclosure includes glass having a composition, the composition including iron oxide. For the content in mass % of the iron oxide in the composition, 0.005≤FeO≤0.30 and 0.01≤T-Fe.sub.2O.sub.3≤0.80 (T-Fe.sub.2O.sub.3 represents total iron oxide calculated as Fe.sub.2O.sub.3) are satisfied. For the iron oxide in the composition, Fe.sup.2+/(Fe.sup.2++Fe.sup.3+), which represents the proportion by mass of Fe.sup.2+ to total iron, is 0.15 or more and 1.00 or less. The glass filler of the present disclosure is a glass filler having a new composition including a coloring component, the glass filler having a high visible transmittance and a controlled color which can be, for example, within a range of colors different from those of conventional glass fillers that have a low visible transmittance.

A glass filler of the present disclosure includes glass having a composition, the composition including iron oxide. For the content in mass % of the iron oxide in the composition, 0.005≤FeO≤0.30 and 0.01≤T-Fe.sub.2O.sub.3≤0.80 (T-Fe.sub.2O.sub.3 represents total iron oxide calculated as Fe.sub.2O.sub.3) are satisfied. For the iron oxide in the composition, Fe.sup.2+/(Fe.sup.2++Fe.sup.3+), which represents the proportion by mass of Fe.sup.2+ to total iron, is 0.15 or more and 1.00 or less. The glass filler of the present disclosure is a glass filler having a new composition including a coloring component, the glass filler having a high visible transmittance and a controlled color which can be, for example, within a range of colors different from those of conventional glass fillers that have a low visible transmittance.

Bioactive glass compositions, composites of the bioactive glass compositions with polymers, and 3D printable filaments made from the same, along with methods of making and using the same, are described. In some embodiments, the compositions, composites, and filaments have antibacterial activity.

A composition for producing a glass fiber, including the following components with corresponding percentage amounts by weight: SiO.sub.2: 57.4-60.9%; Al.sub.2O.sub.3: greater than 17% and less than or equal to 19.8%; MgO: greater than 9% and less than or equal to 12.8%; CaO: 6.4-11.8%; SrO: 0.1-1.5%; Na.sub.2O+K.sub.2O: 0.1-1.1%; Fe.sub.2O.sub.3: 0.05-1%; TiO.sub.2: lower than 0.8%; and SiO.sub.2+Al.sub.2O.sub.3: lower than or equal to 79.4%. The total weight percentage of the above components in the composition is greater than 99%. The weight percentage ratio of Al.sub.2O.sub.3+MgO to SiO.sub.2 is between 0.43 and 0.56, and the weight percentage ratio of CaO+MgO to SiO.sub.2+Al.sub.2O.sub.3 is greater than 0.205. The composition can significantly increase the glass modulus, effectively reduce the glass crystallization rate, secure a desirable temperature range (ΔT) for fiber formation and enhance the refinement of molten glass, thus making it particularly suitable for high performance glass fiber production with refractory-lined furnaces.

A composition for producing a glass fiber, including the following components with corresponding percentage amounts by weight: SiO.sub.2: 57.4-60.9%; Al.sub.2O.sub.3: greater than 17% and less than or equal to 19.8%; MgO: greater than 9% and less than or equal to 12.8%; CaO: 6.4-11.8%; SrO: 0.1-1.5%; Na.sub.2O+K.sub.2O: 0.1-1.1%; Fe.sub.2O.sub.3: 0.05-1%; TiO.sub.2: lower than 0.8%; and SiO.sub.2+Al.sub.2O.sub.3: lower than or equal to 79.4%. The total weight percentage of the above components in the composition is greater than 99%. The weight percentage ratio of Al.sub.2O.sub.3+MgO to SiO.sub.2 is between 0.43 and 0.56, and the weight percentage ratio of CaO+MgO to SiO.sub.2+Al.sub.2O.sub.3 is greater than 0.205. The composition can significantly increase the glass modulus, effectively reduce the glass crystallization rate, secure a desirable temperature range (ΔT) for fiber formation and enhance the refinement of molten glass, thus making it particularly suitable for high performance glass fiber production with refractory-lined furnaces.

New glass compositions and applications thereof are disclosed. Embodiments of the present invention relate to glass compositions, to fiber glass strands, to chopped fiber glass strands, to nonwoven mats of glass fibers, and to other products and methods. A fiber glass strand comprises a plurality of glass fibers comprising the glass composition of the present invention.

New glass compositions and applications thereof are disclosed. Embodiments of the present invention relate to glass compositions, to fiber glass strands, to chopped fiber glass strands, to nonwoven mats of glass fibers, and to other products and methods. A fiber glass strand comprises a plurality of glass fibers comprising the glass composition of the present invention.

A glass composition is provided that includes SiO.sub.2 in an amount from 50.0 to 65.0% by weight; Al.sub.2O.sub.3 in an amount from 18.0 to 23.0% by weight; CaO in an amount from 1 to 8.5% by weight; MgO in an amount from 9.0 to 14.0% by weight; Na.sub.2O in an amount from 0.0 to 1.0% by weight; K.sub.2O in an amount from 0.0 to 1.0% by weight; Li.sub.2O in an amount from 0.1 to 4.0% by weight; TiO.sub.2 in an amount from 0.0 to 2.5% by weight, Y.sub.2O.sub.3 in an amount from 0 to 10.0% by weight; La.sub.2O.sub.3 in an amount from 0 to 10.0% by weight; Ce.sub.2O.sub.3 in an amount from 0 to 5.0% by weight; and Sc.sub.2O.sub.3 in an amount from 0 to 5.0% by weight. Glass fibers formed from the inventive composition may be used in applications that require high stiffness and have elastic modulus between 88 and 115 GPa. Such applications include woven fabrics for use in forming wind turbine blades and aerospace structures.

A glass composition is provided that includes SiO.sub.2 in an amount from 50.0 to 65.0% by weight; Al.sub.2O.sub.3 in an amount from 18.0 to 23.0% by weight; CaO in an amount from 1 to 8.5% by weight; MgO in an amount from 9.0 to 14.0% by weight; Na.sub.2O in an amount from 0.0 to 1.0% by weight; K.sub.2O in an amount from 0.0 to 1.0% by weight; Li.sub.2O in an amount from 0.1 to 4.0% by weight; TiO.sub.2 in an amount from 0.0 to 2.5% by weight, Y.sub.2O.sub.3 in an amount from 0 to 10.0% by weight; La.sub.2O.sub.3 in an amount from 0 to 10.0% by weight; Ce.sub.2O.sub.3 in an amount from 0 to 5.0% by weight; and Sc.sub.2O.sub.3 in an amount from 0 to 5.0% by weight. Glass fibers formed from the inventive composition may be used in applications that require high stiffness and have elastic modulus between 88 and 115 GPa. Such applications include woven fabrics for use in forming wind turbine blades and aerospace structures.

A silicate-based glass composition includes: 40-60 wt. % SiO.sub.2, 0-10 wt. % B.sub.2O.sub.3, 0.01-10 wt. % P.sub.2O.sub.5, 0-10 wt. % Al.sub.2O.sub.3, 0-5 wt. % Li.sub.2O, 10-30 wt. % Na.sub.2O, 0.01-15 wt. % K.sub.2O, 0.01-5 wt. % MgO, 15-30 wt. % CaO, 15-35 wt. % MO, and 15-30 wt. % R.sub.2O, such that MO is the sum of MgO, CaO, SrO, BeO, and BaO, and R.sub.2O is the sum of Na.sub.2O, K.sub.2O, Li.sub.2O, Rb.sub.2O, and Cs.sub.2O.