In embodiments, a glass includes from 45 mol % to 70 mol % SiO.sub.2; from 11.5 mol % to 25 mol % Al.sub.2O.sub.3; from 2 mol % to 20 mol % Li.sub.2O; from greater than 0 mol % to 10 mol % Na.sub.2O; from 9 mol % to 19 mol % MgO; from 4 mol % ZrO.sub.2; and from 0 mol % to 0.5 mol % TiO.sub.2. In other embodiments, a glass includes from 45 mol % to 70 mol % SiO.sub.2; from 4 mol % to 25 mol % Al.sub.2O.sub.3; from 5 mol % to 20 mol % Li.sub.2O; from 0.1 mol % to 10 mol % Na.sub.2O; from 6 mol % to 25 mol % MgO; from 0.1 mol % to 4 mol % ZrO.sub.2; from 0.1 mol % to 5 mol % K.sub.2O; and from 0.05 mol % to 0.5 mol % SnO.sub.2.

Chemically strengthened glass articles having at least one deep compressive layer extending from a surface of the article to a depth of at least about 45 μm within the article are provided. In one embodiment, the compressive stress profile includes a single linear segment extending from the surface to the depth of compression DOC. Alternatively, the compressive stress profile includes two linear portions: the first portion extending from the surface to a relatively shallow depth and having a steep slope; and a second portion extending from the shallow depth to the depth of compression. The strengthened glass has a 60% survival rate when dropped from a height of 80 cm in an inverted ball drop test and a peak load at failure of at least 10 kgf as determined by abraded ring-on-ring testing. Methods of achieving such stress profiles are also described.

Chemically strengthened glass articles having at least one deep compressive layer extending from a surface of the article to a depth of at least about 45 μm within the article are provided. In one embodiment, the compressive stress profile includes a single linear segment extending from the surface to the depth of compression DOC. Alternatively, the compressive stress profile includes two linear portions: the first portion extending from the surface to a relatively shallow depth and having a steep slope; and a second portion extending from the shallow depth to the depth of compression. The strengthened glass has a 60% survival rate when dropped from a height of 80 cm in an inverted ball drop test and a peak load at failure of at least 10 kgf as determined by abraded ring-on-ring testing. Methods of achieving such stress profiles are also described.

To provide a glass plate for a window material and a window comprising the glass plate, which are less likely to be a barrier to radio transmitting/receiving in use of a radio-utilizing apparatus, and a radio communication apparatus comprising the glass plate. A glass plate having a radio transmittance of at least 20% at a frequency of 100 GHz as calculated as 18 mm thickness, a window comprising the glass plate, and a radio communication apparatus comprising the glass plate.

The present invention relates to a glass for chemical strengthening including, in mole percentage on an oxide basis: 60 to 72% of SiO.sub.2; 9 to 20% of Al.sub.2O.sub.3; 1 to 15% of Li.sub.2O; 0.1 to 5% of Y.sub.2O.sub.3; 0 to 1.5% of ZrO.sub.2; and 0 to 1% of TiO.sub.2, having a total content of one or more kinds of MgO, CaO, SrO, BaO and ZnO of 1 to 10%, having a total content of Na.sub.2O and K.sub.2O of 1.5 to 10%, having a total content of B.sub.2O.sub.3 and P.sub.2O.sub.5 of 0 to 10%, wherein a ratio ([Al.sub.2O.sub.3]+[Li.sub.2O])/([Na.sub.2O]+[K.sub.2O]+[MgO]+[CaO]+[SrO]+[BaO]+[ZnO]+[ZrO.sub.2]+[Y.sub.2O.sub.3]) is from 0.7 to 3, wherein a ratio [MgO])/([CaO]+[SrO]+[BaO]+[ZnO]) is from 10 to 45, and having a value M expressed by the following expression of 1,100 or more:

M=−5×[SiO.sub.2]+121×[Al.sub.2O.sub.3]+50×[Li.sub.2O]−35×[Na.sub.2O]+32×[K.sub.2O]+85×[MgO]+54×[CaO]−41×[SrO]−4×[P.sub.2O.sub.5]+218×[Y.sub.2O.sub.3]+436×[ZrO.sub.2]−1180, wherein each of [SiO.sub.2], [Al.sub.2O.sub.3], [Li.sub.2O], [Na.sub.2O], [K.sub.2O], [MgO], [CaO], [SrO], [P.sub.2O.sub.5], [Y.sub.2O.sub.3], and [ZrO.sub.2] designates a content of each component in mole percentage on an oxide basis.

The present invention relates to a glass for chemical strengthening including, in mole percentage on an oxide basis: 60 to 72% of SiO.sub.2; 9 to 20% of Al.sub.2O.sub.3; 1 to 15% of Li.sub.2O; 0.1 to 5% of Y.sub.2O.sub.3; 0 to 1.5% of ZrO.sub.2; and 0 to 1% of TiO.sub.2, having a total content of one or more kinds of MgO, CaO, SrO, BaO and ZnO of 1 to 10%, having a total content of Na.sub.2O and K.sub.2O of 1.5 to 10%, having a total content of B.sub.2O.sub.3 and P.sub.2O.sub.5 of 0 to 10%, wherein a ratio ([Al.sub.2O.sub.3]+[Li.sub.2O])/([Na.sub.2O]+[K.sub.2O]+[MgO]+[CaO]+[SrO]+[BaO]+[ZnO]+[ZrO.sub.2]+[Y.sub.2O.sub.3]) is from 0.7 to 3, wherein a ratio [MgO])/([CaO]+[SrO]+[BaO]+[ZnO]) is from 10 to 45, and having a value M expressed by the following expression of 1,100 or more:

M=−5×[SiO.sub.2]+121×[Al.sub.2O.sub.3]+50×[Li.sub.2O]−35×[Na.sub.2O]+32×[K.sub.2O]+85×[MgO]+54×[CaO]−41×[SrO]−4×[P.sub.2O.sub.5]+218×[Y.sub.2O.sub.3]+436×[ZrO.sub.2]−1180, wherein each of [SiO.sub.2], [Al.sub.2O.sub.3], [Li.sub.2O], [Na.sub.2O], [K.sub.2O], [MgO], [CaO], [SrO], [P.sub.2O.sub.5], [Y.sub.2O.sub.3], and [ZrO.sub.2] designates a content of each component in mole percentage on an oxide basis.

The present invention pertains to a laminated glass for a vehicle, the laminated glass including a first glass sheet, a second glass sheet and an intermediate film sandwiched between the first glass sheet and the second glass sheet, in which: the total thickness of the first glass sheet, the second glass sheet and the intermediate film is 4.0 mm or more; the first glass sheet is formed of a borosilicate glass containing, in terms of oxide by molar percentage, 1.0% or more of B.sub.2O.sub.3; and when a radio wave (TM wave) with a frequency of 79 [GHz] is made incident at an incident angle of 60° to the first glass sheet, the transmission property S21 is -4.0 [dB] or more.

The present invention pertains to a laminated glass for a vehicle, the laminated glass including a first glass sheet, a second glass sheet and an intermediate film sandwiched between the first glass sheet and the second glass sheet, in which: the total thickness of the first glass sheet, the second glass sheet and the intermediate film is 4.0 mm or more; the first glass sheet is formed of a borosilicate glass containing, in terms of oxide by molar percentage, 1.0% or more of B.sub.2O.sub.3; and when a radio wave (TM wave) with a frequency of 79 [GHz] is made incident at an incident angle of 60° to the first glass sheet, the transmission property S21 is -4.0 [dB] or more.

A ceramic printing ink is provided that is suitable for application using an inkjet printing process to produce a coating on glass ceramics. The ink includes a glassy material of glass particles and pigment particles. The glass particles are present in a ratio of total weight to the pigment particles of at least 1.5 and less than 19. The glass particles have an equivalent diameter d.sub.90 ranging from at least 0.5 μm to at most 5 μm. The ink has an effective coefficient of linear thermal expansion, α.sub.20-300,eff, in a range from 6.5*10.sup.−6/K to 11*10.sup.−6/K.

Glass-based articles comprise stress profiles providing improved fracture resistance. The stress profiles contain a high peak tension and a region with a high degree of negative curvature. The glass-based articles herein provide high fracture resistance after multiple drops.