Abstract:
Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs). The glass compositions possess numerous properties that are compatible with the downdraw process, particularly fusion drawing.
Abstract:
An aluminum titanate ceramic article having a predominant crystal phase of aluminum titanate and a material composition including aluminum, titanium, silica, an alkaline earth metal (e.g., at least one selected from the group of strontium, calcium, barium, or combinations), and a rare earth metal (e.g., at least one selected from the group consisting of yttrium, lanthanum, and combinations) and methods of making such aluminum titanate bodies are described. An oxide of yttrium metal or lanthanide metals is preferably used as a sintering aid in combination with the other compositional components to enable firing of the resulting green body at a lower heating temperature of less than 1500° C., and more preferably between 1400°-1450° C., with a preferable hold time of less than 8 hours, more preferably of 6 to 8 hours.
Abstract:
A method of making a strengthened glass article. The method includes altering the glass structure and subsequently creating a compressive layer extending from the surface of the glass to a depth of layer. In some embodiments, the structure is altered by heat treating the glass at a temperature that is less than the annealing point of the glass, and the compressive layer is formed by ion exchange. A strengthened glass article made by the method is also provided.
Abstract:
Computer-implemented methods and apparatus are provided for predicting/estimating (i) a non-equilibrium viscosity for at least one given time point in a given temperature profile for a given glass composition, (ii) at least one temperature profile that will provide a given non-equilibrium viscosity for a given glass composition, or (iii) at least one glass composition that will provide a given non-equilibrium viscosity for a given time point in a given temperature profile. The methods and apparatus can be used to predict/estimate stress relaxation in a glass article during forming as well as compaction, stress relaxation, and/or thermal sag or thermal creep of a glass article when the article is subjected to one or more post-forming thermal treatments.
Abstract:
An aluminosilicate glass article having a high compressive stress layer. The glass article comprises at least about 50 mol % SiO2 and at least about 11 mol % Na2O, and has a layer under a compressive stress of at least about 900 MPa and the depth of layer that extends at least about 30 μm from the surface of the glass article into the glass. A method of making such a glass article is also provided.
Abstract:
Opal glass compositions and devices incorporating opal glass compositions are described herein. The compositions solve problems associated with the use of opal glasses as light-scattering layers in electroluminescent devices, such as organic light-emitting diodes. In particular, embodiments solve the problem of high light absorption within the opal glass layer as well as the problem of an insufficiently high refractive index that results in poor light collection by the layer. Particular devices comprise light-emitting diodes incorporating light scattering layers formed of high-index opal glasses of high light scattering power that exhibit minimal light attenuation through light absorption within the matrix phases of the glasses.
Abstract:
The present disclosure relates to glass articles for use as a touchscreen substrate or cover glass article for use in a portable electronic device, particularly an aluminoborosilicate glass being substantially free of alkalis, comprising at least 55 mol % SiO2, at least 5 mol % Al2O3 and at least one alkaline earth RO component. The alkali-free aluminoborosilicate exhibits an Al2O3+B2O3 to RO mol % ratio which exceeds 1 and an Al2O3 to RO mol % ratio which exceeds 0.65. The aluminoborosilicate glasses disclosed herein exhibits high damage resistance as evidenced by a Vickers median/radial crack initiation load which is greater than than 1000 gf, as well as a high scratch resistance of at least 900 gf, as measured by the lack of the presence of lateral cracks when a load is applied by a moving Knoop indenter.
Abstract translation:本公开涉及用作便携式电子设备中使用的触摸屏基板或盖玻璃制品的玻璃制品,特别是基本上不含碱的铝硼硅酸盐玻璃,其包含至少55摩尔%的SiO 2,至少5摩尔%的Al 2 O 3和 至少一种碱土金属RO组分。 无碱铝硼硅酸盐的Al 2 O 3 + B 2 O 3与RO摩尔%比超过1,Al 2 O 3与RO摩尔%比超过0.65。 本文公开的铝硼硅酸盐玻璃表现出高的耐损伤性,如通过维氏中值/径向裂纹起始载荷大于1000gf以及高至少900gf的高耐刮擦性所证明的,如通过不存在 通过运动的Knoop压头施加负载时的横向裂纹。
Abstract:
Aluminoborosilicate glasses which may be useful in photovoltaic, photochromic, electrochromic, or Organic Light Emitting Diode (OLED) lighting applications are described.
Abstract:
Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs). In accordance with certain of its aspects, the glasses possess good dimensional stability as a function of temperature.
Abstract:
An aluminosilicate glass article having a high compressive stress layer. The glass article comprises at least about 50 mol % SiO2 and at least about 11 mol % Na2O, and has a layer under a compressive stress of at least about 900 MPa and the depth of layer that extends at least about 30 μm from the surface of the glass article into the glass. A method of making such a glass article is also provided.