A lithium aluminum silicate (LAS) glass-ceramic has an average coefficient of thermal expansion (CTE) in a range from 0 to 50? C. of at most 0?0.1?10.sup.?6/K and a thermal hysteresis at least in a temperature range from 15? C. to 35? C. of <0.1 ppm. The LAS glass-ceramic includes (in mol % based on oxide): SiO.sub.2 60-<70; Li.sub.2O 7-9.6; MgO+ZnO>0.5-1.5; R.sub.2O>0.5, where R.sub.2O is Na.sub.2O and/or K.sub.2O and/or Cs.sub.2O and/or Rb.sub.2O; and nucleating agent with a content of 1.5 to 6 mol %. The nucleating agent is at least one component selected from the group consisting of TiO.sub.2, ZrO.sub.2, Ta.sub.2O.sub.5, Nb.sub.2O.sub.5, SnO.sub.2, MoO.sub.3, WO.sub.3 and HfO.sub.2.

A volume-colored monolithic glass ceramic cooking plate is provided. The plate includes a first zone in which the coloration of the glass ceramic differs from that of a second, adjacent zone, so that an absorption coefficient of the first zone is lower than the absorption coefficient of the second, adjacent zone and so that integral light transmission in the visible spectral range is greater in the first zone than the integral light transmission of the second, adjacent zone. The light scattering in the glass ceramic of the first zone differs from light scattering in the glass ceramic of the second zone by not more than 20 percentage points, preferably by not more than 5 percentage points.

A vacuum insulating panel includes first and second substrates (e.g., glass substrates), a hermetic edge seal, a pump-out port, and spacers sandwiched between at least the two substrates. The gap between the substrates may be at a pressure less than atmospheric pressure to provide insulating properties. The panel may include a getter. The getter may be laser activated in a manner which causes the getter to transform and realize a TiAlV phase (e.g., Al.sub.3V.sub.0.333Ti.sub.0.667) of crystallite material. The getter may be a thin film getter and/or may be elongated in shape.

A method of making a vacuum insulating panel including a first substrate, a second substrate, a plurality of spacers provided in a gap between at least the first and second substrates, and a seal provided between at least the first and second substrates, the seal comprising a first seal layer, and optionally second and/or third primer layer(s). The method may include at least one of: (i) laser heating, using a laser beam from a laser, the first seal material for firing and/or sintering the first seal material to form the first seal layer, in a manner that causes TeO.sub.4>TeO.sub.3 in the first seal material to transform into TeO.sub.3>TeO.sub.4 due to said laser heating, whereby an amount of TeO.sub.4 decreases and an amount of TeO.sub.3 increases due to said laser heating, and/or (ii) laser heating in a manner that causes V.sub.2O.sub.5>VO.sub.2 in the first seal material to transform into VO.sub.2>V.sub.2O.sub.5 due to said laser heating whereby an amount of VO.sub.2 increases and an amount of V.sub.2O.sub.5 decreases due to said laser heating, so that after said laser heating the first seal layer comprises more VO.sub.2 than V.sub.2O.sub.5 by wt. %.

A method of making a vacuum insulating panel, the vacuum insulating panel comprising a first glass substrate, a second glass substrate, a plurality of spacers provided in a gap between at least the first and second glass substrates, and a seal provided between at least the first and second glass substrates, the seal comprising a first seal layer and/or a second seal layer. The method may include laser heating, using a laser beam from a continuous wave near-IR laser, seal material in order to form the first seal layer; wherein the laser heating may include causing the laser beam to move at a lateral speed of from about 5-70 mm/second relative to the substrates and the first seal material so that the laser beam at least partially passes through at least one of the glass substrates and impinges upon at least the second seal layer in order to heat the second seal layer and fire and/or sinter the first seal material thereby forming the first seal layer.

A vacuum insulating panel may include: a first substrate; a second substrate; a plurality of spacers provided in a gap between at least the first and second substrates, wherein the gap is at a pressure less than atmospheric pressure; a seal provided between at least the first substrate and the second substrate, the seal comprising a first seal layer; wherein the first seal layer comprises tellurium oxide and vanadium oxide; wherein the first seal layer comprises, on a wt. %, more tellurium oxide than vanadium oxide, and has a density of from about 2.8-4.0 g/cm.sup.3.

A vacuum insulating panel may include: a first substrate; a second substrate; a plurality of spacers provided in a gap between at least the first and second substrates, wherein the gap is at pressure less than atmospheric pressure; a pump-out/evacuation tube extending at least partly into an aperture in one of the substrates; and a pump-out/evacuation tube seal. The pump-out/evacuation tube seal may include at least one of: (a) from about 20-80 wt. % tellurium oxide, the tellurium oxide comprising TeO.sub.4 and TeO.sub.3, wherein the pump-out tube seal comprises more TeO.sub.3 than TeO.sub.4 by wt. %; and/or (b) tellurium oxide and from about 10-50 wt. % vanadium oxide, wherein the pump-out tube seal by wt. % comprises more tellurium oxide than vanadium oxide, and wherein the vanadium oxide comprises VO.sub.2 and V.sub.2O.sub.5, and wherein more V in the pump-out tube seal is in a form of VO.sub.2 than V.sub.2O.sub.5. A substantially donut-shaped laser beam may be used to heat pump-out tube material in order to form a pump-out tube seal.

A vacuum insulating panel includes first and second substrates (e.g., glass substrates), a hermetic edge seal, a pump-out port, and spacers sandwiched between at least the two substrates. The gap between the substrates may be at a pressure less than atmospheric pressure to provide insulating properties. The panel may include a getter. The getter may be a thin film getter and/or may be elongated in shape.

A vacuum insulating panel includes first and second substrates (e.g., glass substrates), a hermetic edge seal, a pump-out port, and spacers sandwiched between at least the two substrates. The gap between the substrates may be at a pressure less than atmospheric pressure to provide insulating properties. The vacuum insulating panel may include a multi-layer edge seal structure with coefficients of thermal expansion (CTEs) of layers of the seal structure optimized for CTE grading.

A vacuum insulating panel includes first and second substrates (e.g., glass substrates), a hermetic edge seal, a pump-out port, and spacers sandwiched between at least the two substrates. The gap between the substrates may be at a pressure less than atmospheric pressure to provide insulating properties. The vacuum insulating panel may include a multi-row edge seal structure.