A glass-ceramic includes glass and crystalline phases, where the crystalline phase includes non-stoichiometric suboxides of titanium, forming ‘bronze’-type solid state defect structures in which vacancies are occupied with dopant cations.

Embodiments of a glass-ceramic, glass-ceramic article or glass-ceramic window that includes 40 mol %≤SiO.sub.2≤80 mol %; 1 mol %≤AI.sub.2O.sub.3≤15 mol %; 3 mol %≤B.sub.2O.sub.3≤50 mol %; 0 mol %≤R.sub.2O≤15 mol %; 0 mol %≤RO≤2 mol %; 0 mol %≤P.sub.2O.sub.5≤3 mol %; 0 mol %≤SnO.sub.2≤0.5 mol %; 0.1 mol %≤MoO.sub.3≤15 mol %; and 0 mol %≤WO.sub.3≤10 mol % (or 0 mol %<MoO.sub.3≤15 mol %; 0.1 mol %≤WO.sub.3≤10 mol %; and 0.01 mol %≤V.sub.2O.sub.5≤0.2 mol %), wherein the WO.sub.3 (mol %) plus the MoO.sub.3 (mol %) is from 1 mol % to 19 mol %, and wherein R.sub.2O (mol %) minus the AI.sub.2O.sub.3 (mol %) is from −12 mol % to 4 mol %, are disclosed.

Glass compositions include phosphorus oxide (P.sub.2O.sub.5), niobia (Nb.sub.2O.sub.5), titania (TiO.sub.2), potassium oxide (K.sub.2O) and calcium oxide (CaO) as essential components and may optionally include barium oxide (BaO), sodium oxide (Na.sub.2O), lithium oxide (Li.sub.2O), tungsten oxide (WO.sub.3), bismuth oxide (Bi.sub.2O.sub.3), tantalum oxide (Ta.sub.2O.sub.5), silica (SiO.sub.2) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

A laminate glass-ceramic article is provided that includes: a core glass layer having a first coefficient of thermal expansion (CTE); and a plurality of clad glass-ceramic layers, each having a CTE that is lower than or equal to the first CTE of the core glass layer. A first of the clad glass-ceramic layers is laminated to a first surface of core glass layer and a second of the clad glass-ceramic layers is laminated to a second surface of the core glass layer. Further, a total thickness of the plurality of clad glass-ceramic layers is from about 0.05 mm to about 0.5 mm. In addition, each of the glass-ceramic layers includes: an alumino-boro-silicate glass, 0 mol %≤MoO.sub.3≤15 mol %, and 0 mol %≤WO.sub.3≤15 mol %, the WO.sub.3 (mol %) plus the MoO.sub.3 (mol %) is from 0.7 mol % to 19 mol %.

A glass composition includes a base glass portion comprising: 65-75 wt % SiO.sub.2; 5-15 wt % CaO; 0-5 wt % MgO; 0-5 wt % K.sub.2O; 10-14 wt % Na.sub.2O; and 1-5 wt % Al.sub.2O.sub.3; wherein the glass composition has a ratio of Na.sub.2O to Al.sub.2O.sub.3 is in the range of 9.5-12.5 wt %/wt %.

A glass sheet contains, as represented by mass percentage based on oxides, SiO.sub.2: 65-75%, Al.sub.2O.sub.3: 0-20%, MgO: 0-5%, CaO: 2-20%, Na.sub.2O: 5-20%, K.sub.2O: 0-10%, total iron in terms of Fe.sub.2O.sub.3 (t-Fe.sub.2O.sub.3): 0.2-1.0%, TiO.sub.2: 0.65-1.5%, and CeO.sub.2: 0.1-2.0%. A ratio of the content of MgO to RO is 0.20 or less, where RO is a total amount of MgO, CaO, SrO and BaO. Fe-redox is from 30 to 57%. The glass sheet has a visible light transmittance Tv_A of 65% or more, a solar transmittance Te of 50% or less, and a dominant wavelength Dw of transmitted light of from 508 to 580 nm, in terms of a 3.9-mm thickness of the glass sheet. A value of A=([t-Fe.sub.2O.sub.3]×Fe-redox)/[TiO.sub.2] is from 20 to 40, where [t-Fe.sub.2O.sub.3] is the content of t-Fe.sub.2O.sub.3 and [TiO.sub.2] is the content of TiO.sub.2.

A glass-ceramic includes a silicate-containing glass and crystals within the silicate-containing glass. The crystals include non-stoichiometric tungsten and/or molybdenum sub-oxides, and the crystals are intercalated with dopant cations.

Multicolored glass-based articles and methods of manufacture are disclosed. The method includes forming a glass-based part and exposing a first region to radiation and a second region to radiation such that the first and second regions have different sized metallic nanoparticles, resulting in a multicolored glass article.

Optically transparent glass ceramic materials comprising a glass phase containing and a crystalline tungsten bronze phase comprising nanoparticles and having the formula M.sub.xWO.sub.3, where M includes at least one H, Li, Na, K, Rb, Cs, Ca, Sr, Ba, Zn, Cu, Ag, Sn, Cd, In, Tl, Pb, Bi, Th, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and U, and where 0<x<1. Aluminosilicate and zinc-bismuth-borate glasses comprising at least one of Sm.sub.2O.sub.3, Pr.sub.2O.sub.3, and Er.sub.2O.sub.3 are also provided.

Disclosed is a type of borosilicate glass, the composition of which, based on oxides, contains the following components by weight percentage (wt %): 2.0 wt %-5.0 wt % of TiO.sub.2, 0.25 wt %-2.5 wt % of CeO.sub.2 and 0.25 wt %-3.0 wt % of Y.sub.2O.sub.3, and does not contain any iron compound, such as ferric oxide. The glass has better UV resistance and alkaline resistance properties, and a better light transmission rate, and is particularly suitable for use in the field of pharmaceutical packaging materials.