Abstract: A strengthened glass that does not exhibit frangible behavior when subjected to impact or contact forces, and a method of strengthening a glass. The glass may be strengthened by subjecting it to multiple, successive, ion exchange treatments. The multiple ion exchange treatments provide a local compressive stress maximum at a depth of the strengthened layer and a second local maximum at or near (e.g., within 10 ?m) the surface of the glass.

Abstract: The present invention provides a glass flake having sufficiently high visible-light absorptivity. The glass flake of the present invention includes a glass composition that contains a transition metal oxide such as an iron oxide and that allows the glass flake to have a visible-light transmittance of 85% or lower measured with an A light source when the glass flake has a thickness of 15 ?m. In this glass composition, it is preferable that the content of Fe2O3 (T?Fe2O3) in terms of the total iron satisfies the following formula, expressed in mass %: 10<T?Fe2O3?50.

Abstract: The subject of the invention is a mineral wool capable of dissolving in a physiological medium, which wool comprises the constituents below in the following percentages by weight: SiO2 39–44%, preferably 40–43% Al2O3 16–27%, preferably 16–26% CaO 6–20%, preferably 8–18% MgO 1–5%, preferably 1–4.9% Na2O 0–15%, preferably 2–12% K2O 0–15%, preferably 2–12% R2O (Na2O + K2O) 10–14.7%, preferably 10–13.5% P2O5 0–3%, especially 0–2% Fe2O3 (total iron) 1.5–15%, especially 3.2–8% B2O3 0–2%, preferably 0–1% TiO2 0–2%, preferably 0.4–1%.

Abstract: To provide a glass plate for display devices wherein without carrying out a post treatment, the depth of a compression stress layer is increased, while the surface compression stress is prevented from being excess only by chemical tempering. A glass plate for display devices, which is obtained by chemically tempering a glass plate comprising, as represented by mol % based on the following oxides, from 50 to 74% of SiO2, from 1 to 10% of Al2O3, from 6 to 14% of Na2O, from 3 to 15% of K2O, from 2 to 15% of MgO, from 0 to 10% of CaO and from 0 to 5% of ZrO2, wherein the total content of SiO2 and Al2O3 is at most 75%, the total content of Na2O and K2O, i.e. Na2O+K2O, is from 12 to 25%, and the total content of MgO and CaO, i.e. MgO+CaO, is from 7 to 15%.

Abstract: The present invention relates to a glass composition having a low thermal expansion coefficient, a glass fiber, an insulating layer of printed circuit board and a printed circuit board. A glass fiber, an insulating layer of printed circuit board and a printed circuit board may be obtained by employing a glass composition including 40 to 60 parts by weight of silicon oxide, 20 to 40 parts by weight of aluminum oxide and 5 to 20 parts by weight of lithium oxide.

Abstract: The glass substrate for a solar cell of the present invention is characterized by having a glass composition including, in terms of mass %, 50 to 80% of SiO2, 5 to 20% of Al2O3, 0 to 20% of B2O3, 0 to 20% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 20% of BaO, 0.001 to 2% of SnO2, 0 to 1% of As2O3, having a mass ratio SnO2/(Fe2O3+SnO2) of 0.9 or more, and having a difference between transmittances at a wavelength of 400 nm before and after irradiation with ultraviolet ray of 2% or less.

Abstract: The glass ceramic or glass element that can be subjected to high thermal loads is decorated with a metallic colorant. The metallic colorant consists of a melted silicate and at least one effect pigment, which is included in a specified proportion in a melt of the silicate glass to form the metallic colorant. The at least one effect pigment is in the form of platelets of synthetic aluminum oxide (Al2O3) coated with at least one metal oxide. Preferably the at least one effect pigment is a XIRALLIC® high chroma sparkle pigment supplied commercially by Merck and the metallic colorant has a pigment content of from 1 to 30 wt. %.

Abstract: To provide a substrate glass for data storage medium which is excellent in weather resistance even when no additional treatment such as chemical reinforcement treatment is applied and less susceptible to a whitening phenomenon and which has a glass transition temperature of at least 680° C. and is excellent in acid resistance. A substrate glass for data storage medium, which comprises, as represented by mass %, from 47 to 60% of SiO2, from 8 to 20% of Al2O3, from 0 to 8% of MgO, from 0 to 6% of CaO, from 1 to 18% of SrO, from 0 to 13% of BaO, from 1 to 6% of TiO2, from 1 to 5% of ZrO2, from 2 to 8% of Na2O and from 1 to 15% of K2O and which has a glass transition temperature of at least 680° C.

Abstract: A glass ceramic material sealed fuel cell device, including a first fuel cell portion and a sealant layer bonded to the first cell portion. The sealant layer includes at least three metal oxides RO-M2O3—SiO2 combined together. R is selected from the group consisting of zinc, strontium, calcium, magnesium and combinations thereof. M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof. RO is present in an amount of between about 45 mol % and about 55 mol %. M2O3 is present in an amount of between about 5 mol % and about 10 mol %. SiO2 is present in an amount of about 40 mol %. RO includes RnO present in an amount of at least about 5 mol %.

Abstract: A glass that is ion exchangeable to a depth of at least 20 ?m (microns) and has a internal region having a tension of less than or equal to 100 MPa. The glass is quenched or fast cooled from a first temperature above the anneal point of the glass to a second temperature that is below the strain point of the glass. In one embodiment, the glass is a silicate glass, such as an alkali silicate glass, an alkali aluminosilicate glass, an aluminosilicate glass, a borosilicate glass, an alkali aluminogermanate glass, an alkali germanate glass, an alkali gallogermanate glass, and combinations thereof.

Abstract: The invention is directed to a high strength, chemically toughened protective glass article, the glass article having a high damage tolerance threshold of at least 1500 g as measured by the lack of radial cracks when the load is applied to the glass using a Vickers indenter; preferably greater than 2000 g s measured by the lack of initiation of radial cracks when the load is applied to the glass using a Vickers indenter

Abstract: A tempered glass substrate of the present invention is a tempered glass substrate, which has a compression stress layer on a surface thereof, and has a glass composition comprising, in terms of mass %, 40 to 71% of SiO2, 3 to 21% of Al2O3, 0 to 3.5% of Li2O, to 20% of Na2O, and 0 to 15% of K2O.

Abstract: A chemically strengthened glass substrate for use as the substrate of an information recording medium such as a magnetic disk, magneto-optical disk, DVD, or MD, wherein a strengthened formed by chemical strengthening exists on the outer edge surface and on the inner edge surface but substantially not on a surface on which an information recording layer is formed.

Abstract: The crystallization-stable alumino-silicate glass is free of B2O3 and contains 50 to 60% by weight, SiO2; 14 to 25% by weight, Al2O3; 0 to 2% by weight, P2O5; 0 to 7, % by weight, MgO; 5 to 14% by weight, CaO; 0.1-2.0% by weight, SrO; 12.0 to 18% by weight BaO and at least 0.01% by weight MoO3. The glass preferably contains <0.01 wt. % of water. The glass has high transmission in the visible and IR region of the spectrum, which makes it especially suitable for lamps, bulbs for halogen lamps; and also for solar collectors, for flat display screens and for pharmaceutical packages n which the glass functions as a UV-protective glass.

Abstract: The method of making a vacuum tube collector or X-ray tube, which includes a matching glass-metal joint, includes providing a glass tube (1) made of a glass with a composition, in percent by weight on the basis of oxide content, consisting of B2O3, 8-11.5; Al2O3, 5-9; Na2O, 5-9; K2O, 0-5; CaO, 0.4-1.5; balance, SiO2; and bonding, preferably fusing or melting, an end portion of the glass tube (1) with a metal part (2) in order to bond or attach the glass tube to the metal part, thus forming a long-lasting glass-metal joint. The method of making the glass-metal joint is performed without using intermediary glass compositions of varying thermal conductivities. In the case of the vacuum tube collector the method can provide the basis for an automated manufacture of the vacuum tube collector.

Abstract: A technique of manufacturing glass having fairly clear color and/or high visible transmission is provided. In certain example embodiments of this invention, it has surprisingly been found that by using carbon-containing compound(s) including CxHyOz.mH2O, excellent melting and refining can be achieved in the manufacture of glass, and not as much ferrous iron is formed compared to the use of elemental carbon as a refining agent. Such compound(s) are especially advantageous when highly transparent clear glass is desired, in that less ferrous iron is formed and thus transmittance and coloration can be improved.

Abstract: In order to obtain glass or glass ceramic materials having increased strength, the invention provides a method for producing glass or glass ceramic articles, which comprises the steps: producing an initial glass body (11), mounting the initial glass body (11) on a gas cushion (13) between a levitation support (1) and the initial glass body (11), and at least partially ceramizing the initial glass body (11) on the levitation support (1). The levitation support comprises at least one continuous surface region (3) having at least one gas feed region (151, 152, 153) where levitation gas for the gas cushion (13) is fed out from the levitation support, and at least one gas discharge region (171 172, 173) where gas from the gas cushion (13) is at least partially discharged into the levitation support.

Abstract: A glass composition of the present invention is manufactured by melting glass raw materials and contains a multicomponent oxide as a main component, and the glass composition contains at least one of helium and neon in an amount of 0.01 to 2 ?L/g (0° C. 1 atm).

Abstract: The lamp bulb for discharge lamps is made from an aluminosilicate glass with a transformation temperature Tg>600° C. The aluminosilicate glass has a composition (in % by weight, based on oxide content) of SiO2>55-64; Al2O3, 13-18; B2O3, 0-5.5; MgO, 0-7; CaO, 5-14; SrO, 0-8; BaO, 6-17; ZrO2, 0-2; TiO2, 0-5, but may contain small amounts of CeO2 and/or Fe2O3, for anti-solarization and fining agents, such as SnO2, Sb2O3 and/or As2O3. The lamp bulbs for the discharge lamps of the invention may include a melted-in molybdenum electrode and/or an electrode feed or they may be free of any internal electrodes. A method for making the lamp bulbs is also described.

Abstract: The present invention provides a glass composition that exhibits a fluorescence function and an optical amplification function in a wide wavelength range. This glass composition includes a bismuth oxide, a silicon oxide, an aluminum oxide, and a divalent metal oxide, and the glass composition emits fluorescence in an infrared wavelength region through irradiation of excitation light, with bismuth contained in the bismuth oxide functioning as a fluorescent source.

Abstract: To provide a glass for an information recording media substrate, which is excellent in weather resistance. A glass for an information recording media substrate, which comprises, as represented by mol % based on oxide, from 61 to 66% of SiO2, from 11.5 to 17% of Al2O3, from 8 to 16% of Li2O, from 2 to 8% of Na2O, from 2.5 to 8% of K2O, from 0 to 6% of MgO, from 0 to 4% of TiO2 and from 0 to 3% of ZrO2, provided that Al2O3+MgO+TiO2 is at least 12%, and Li2O+Na2O+K2O is from 16 to 23%, wherein in a case of where B2O3 is contained, its content is less than 1%. The above glass for an information recording media substrate, wherein when the glass is left under steam atmosphere at 120° C. at 0.2 MPa for 20 hours, and the amount of Li, the amount of Na and the amount of K, which precipitate on a surface of the glass are represented as CLi, CNa and CK respectively, CNa is at most 0.7 nmol/cm2, and CLi+CNa+CK is at most 3.5 nmol/cm2.

Abstract: Titanium is added in the form of atoms, a colloid, or ions to a glass to be subjected to laser processing in which the ablation or vaporization caused by the energy of an absorbed laser light is utilized. Since titanium can be incorporated into the glass through melting, the threshold value for processing can be easily regulated by changing the amount titanium to be added and a material having evenness in processability can be obtained.

Abstract: An optical glass for the manufacture of large transmission optics, such as lenses having a thickness of 100 millimeters or more, comprises 35 to 70 wt.-% SiO2, 17 to 35 wt.-% Al2O3, 3 to 17 wt.-% P2O5, 0 to 6 wt.-% Li2O, 0,5 to 4 wt.-% MgO, 0,5 to 3 wt.-% ZnO, a maximum of 1 wt.-% CaO, a maximum of 0,5 wt.-% BaO, 0,5 to 6 wt.-% TiO2, 0,5 to 3 wt.-% ZrO2, 0 to 1 wt.-% Na2O, 0 to 1 wt.-% K2O, a maximum of 1 wt.-% of refining agents (As2O3, SP2O3) and a maximum of 500 ppm of other contaminants. The glass composition may be equal to the composition of the glass ceramic Zerodur® and allows to manufacture large transmission optics in a cost-effective way, has a maximum of transmittance which is in the range of a He—Ne lasers and has a CTE of about 3·10?6/K.

Abstract: A glass composition of the present invention includes the following components, in terms of mass % and mass ppm: 60 to 79% SiO2; 0 to 13% B2O3 (exclusive of 13%); 0 to 10% Al2O3; 0 to 10% Li2O; more than 0% but not more than 20% Na2O; 0 to 15% K2O; 0 to 10% MgO; 0 to 15% CaO; 0 to 15% SrO; 0 to 15% BaO; 0 to 10% ZnO; 0 to 15% Nb2O5; 0 to 20% Ta2O5; more than 0.02% but not more than 10% TiO2; and 0.5 to 50 ppm T-Fe2O3 (where T-Fe2O3 denotes a total iron oxide obtained by converting all of iron compounds into Fe2O3).

Abstract: An ultraviolet ray transmitting glass composition including the following components, in terms of mass % or mass ppm: 60 to 79% SiO2; 0 to 1% B2O3; exceeded 0% but not more than 20% Al2O3; 0 to 10% Li2O; 5 to 20% Na2O; 0 to 15% K2O; 0 to 10% MgO; 0 to 10% CaO; 0 to 15% SrO; 0 to 2% refining agent; 2 to 20 ppm T-Fe2O3 (in which T-Fe2O3 denotes a total iron oxide content obtained by converting all of iron compounds into Fe2O3); and 0 to 200 ppm TiO2. The ultraviolet ray transmitting glass composition is suitable for a glass article, such as a bioanalytical device that is used for analysis using ultraviolet rays.

Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Abstract: There are provided glass-ceramics comprising, in mass %, 50-60% SiO2, 22-26% Al2O3 and 3-5% Li2O, having an average crystal grain diameter exceeding 100 nm, and having an average linear thermal expansion coefficient of 30×10?7/° C. or below within a temperature range of 0° C. to 50° C. These glass-ceramics are manufactured by a step of melting glass raw materials, a step of forming the molten glass, a step of annealing the formed glass, a first heat treating step for heat treating the annealed glass at a temperature of 650-750° C. for 0.1 hour to 200 hours, and a second heat treating step for heat treating the glass at a temperature of 800-1000° C. for 0.1 hour to 50 hours.

Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Abstract: The present invention relates to semiconductor-on-insulator structures having strained semiconductor layers. According to one embodiment of the invention, a semiconductor-on-insulator structure has a first layer including a semiconductor material, attached to a second layer including a glass or glass-ceramic, with the strain point of the glass or glass-ceramic equal to or greater than about 800° C.

Abstract: The present invention relates to: novel glass-ceramics of ?-quartz and/or of ?-spodumene; articles made from said novel glass-ceramics; and ithium alumino-silicate glasses, which are precursors of said novel glass-ceramics; methods of preparing said novel glass-ceramics and articles made from said novel glass-ceramics. The present invention relates to the use of SnO2 and of Br, as an agent for fining the glass-ceramic glass precursor.

Abstract: The colorless transparent colloid-former-containing glass that is convertible into a colorless transparent glass ceramic or a metal colloid-colored glass ceramic via respective heat treatments contains a combination of one or more metal colloid formers and one or more redox partners. The metal colloid formers are compounds containing Au, Ag, As, Bi, Nb, Cu, Fe, Pd, Pt, Sb and/or Sn. The redox partners are compounds containing As, Ce, Fe, Mn, Sb, Sn and/or W, with the proviso that the redox partner must be different from the metal colloid former.

Abstract: Glass-ceramics include SiO2, Al2O3 and Li2O on oxide basis. In the glass-ceramics, total amount in mass % of SiO2 and Al2O3 is less than 77% and Li2O/(SiO2+Al2O3) which is the ratio in mass % of the amount of Li2O to the total amount of SiO2 and Al2O3 is 0.064 or over. The glass-ceramics include at least one crystal phase selected from the group consisting of ?-quartz, ?-quartz solid solution, ?-eucryptite, ?-eucryptite solid solution, ?-spodumene and ?-spodumene solid solution.

Abstract: The present invention relates to a glass filler material with an average particle size of 0.1-20 ?m. It further relates to a method for producing a glass filler material. The glass filler material comprises 65-99.95 mol % silicon dioxide (SiO2), 0-15 mol % aluminum and/or boron oxide (Al2O3, B2O3), 0-30 mol % zirconium and/or titanium and/or hafnium oxide (ZrO2, TIO2, HfO2), Y2O3 and/or Sc2O3 and/or La2O3 and/or CeO2 and/or other lanthanide oxides, 0.05-4 mol % alkali metal oxides (Na2O, Li2O, K2O, Rb2O, Cs2O), 0-25 mol % earth alkali metal oxides (MgO, CaO, SrO, BaO). The glass filler material shows a low concentration of alkali ions and is used for composites with cationically curing properties and for dental composites and dental restoration materials.

Abstract: A glass-ceramic is provided having a thermal expansion coefficient in a range of 3-6 ppm/° C., a dielectric constant that is less than 5 and a Quality factor Q of at least 400. The glass-ceramic consists essentially of SiO2 in a range of 45-58 wt %, Al2O3 in a range of 10-18 wt % and MgO in a range of 10-25 wt %. A method of making the glass-ceramic is also provided. Further, an electronic package is also provided, including a base member and a glass-ceramic substrate bonded to the base member.

Abstract: The invention relates to novel uses of glass ceramics, wherein glass ceramics, in particular, in the form of a glass ceramic tube, are used. Said glass ceramics contain 0—less than 4 wt % P205 and 0 less than 8 wt-% CaO. The tubes can be used in multiple areas of application and/or in multiple types of lamps, for example in general lighting or car lights and in heat radiators, such as halogen lamps or incandescent lamps, and/or in high pressure discharge lamps or low pressure discharge lamps. The glass ceramics, can also, in particular, be minimised in order to form known backlighting in conjunction with background lighting of flat screens. Said type of glass ceramics have excellent spectral transmission in the visible wave length rang and are solarisation stable and absorb strong UV light.

Abstract: The present invention provides a mother glass composition for gradient-index lens, from which a lead-free Li-based gradient-index lens that is excellent in weather resistance, in particular weather resistance in the presence of water, can be manufactured. The mother glass composition includes the following components, indicated by mol %: 40?SiO2?65; 1?TiO2?10; 0.1?MgO?22; 0.15?ZnO?15; 2?Li2O?18; 2?Na2O?20; 0?B2O3?20; 0?Al2O3?10; 0?K2O?3; 0?Cs2?O?3; 0?Y2O3?5; 0?ZrO2?2; 0?Nb2O5?5; 0?In2O3?5; 0?La2O3?5; and 0?Ta2O5?5. The mother glass composition further includes at least two oxides selected from CaO, SrO, and BaO each in a range of 0.1 mol % to 15 mol %. The total of MgO+ZnO is greater than or equal to 2 mol %. The molar ratio of ZnO/(MgO+ZnO) is in a range of 0.07 to 0.93. The total of Li2O+Na2O is in a range of 6 mol % to 38 mol %. The total of Y2O3+ZrO2+Nb2O5+In2O3+La2O3+Ta2O5 is in a range of 0 mol % to 11 mol %.

Abstract: A glass for laser processing of the present invention can be laser-processed by causing ablation or evaporation by laser beam energy absorbed therein, wherein the glass for laser processing has a composition that satisfies the following conditions: 60?SiO2+B2O3?79 mol %; 5?Al2O3+TiO2?20 mol %; and 5?Li2O+Na2O+K2O+Rb2O+Cs2O+MgO+CaO+SrO+BaO?20 mol %, where 5?TiO2?20 mol %. The present invention can provide a glass for laser processing that has a low laser processing threshold value as well as a low thermal expansion coefficient.

Abstract: A colorant for a high redox glass composition comprising: total iron (Fe2O3) 0 to 1.1 weight percent; and from 0.0001 to 0.15 weight percent of at least one of the following: Cu nanostructures, Au nanostructures, or Ag nanostructures, wherein the weight percents are based on the total weight of the glass composition. The colorant of the invention can be used to make glass compositions having various colors.

Abstract: A glass substrate for use as the substrate of an information recording medium such as a magnetic disk, magneto-optical disk, DVD, or MD or of an optical communication device, and a glass composition for making such a glass substrate, contains the following glass ingredients: 45 to 75% by weight of SiO2; 1 to 20% by weight of Al2O3; 0 to 15% by weight, zero inclusive, of B2O3; SiO2+Al2O3+B2O3 accounting for 65 to 90% by weight; a total of 7 to 20% by weight of R2O compounds, where R=Li, Na, and K; and a total of 0 to 12% by weight, zero inclusive, of R?O compounds, where R?=Mg, Ca, Sr, Ba, and Zn. Moreover, the following conditions are fulfilled: B2O3=0% by weight, or Al2O3/B2O3?1.0; and (SiO2+Al2O3+B2O3)/(the total of R2O compounds+the total of R2O compounds)?3.

Abstract: Objects of the present invention are: a lead-free enamel composition comprising finely divided glass particles, finely divided pigment particles and an organic binder, characterised in that the glass of said particles is a lead-free mineral glass, essentially having the composition below, which is expressed in percentages by weight of oxides: SiO2 45-60 B2O3 ?0-10 Al2O3 ?6-17 Na2O 0-7 K2O 0-7 Li2O 0-7 CaO ?0-12 BaO 13-27 ZnO ?3-17 MgO 0-9 TiO2 0-2 ZrO2 0-7 with Na2O + K2O + Li2O >4 the enamel able to be obtained by firing of said composition; glass-ceramic articles, which are decorated with said enamel; and new lead-free mineral glasses.

Abstract: Decorative paints are typically burned in at relatively high temperatures, preferably in connection with the thermal ceramicizing process. In order to provide a glass ceramic panel having a cooking surface with a pleasing deep black, very smooth decoration by a burned-in decorative paint, the glass ceramic panel is formed from a melt that is black and the decorative paint on the black glass ceramic panel contains a colorless glass flux and from 0 to 10 percent by weight of at least one black pigment. The decorative paint can consist of the colorless melted-on glass flux. The glass flux preferably has a composition in percent by weight of Li2O, 0-5; Na2O, 0-5; K2O, <2; ?Li2O+Na2O+K2O, 1-10; MgO, 0-3; CaO, 0-4; SrO, 0-4; BaO, 0-4; ZnO, 0-4; B2O3, 15-27; Al2O3, 10-20; SiO2, 43-58; TiO2, 0-3; ZrO2, Sb2O3, 0-2; F, 0-3.

Abstract: An optical glass that contains Si, Al, Mg, and O is provided. The optical glass contains Si in an amount of 40% or more and 60% or less, in cation percent, Al in an amount of 10% or more and 35% or less, in cation percent, and Mg in an amount of 20% or more and 35% or less, in cation percent. In the optical glass, the total amount of Si, Al, and Mg is 99.5% or more, in cation percent. Furthermore, the optical glass contains Fe and Na each in an amount of 0.01 wtppm or less and has a transmittance to a light having a wavelength of 248 nm of 40% or more at a thickness of 5 mm.

Abstract: The present invention relates to a glass substrate composition comprising SiO2 55˜70 wt %, Al2O3 0˜1 wt %, ZrO2 0.1˜5 wt %, Na2O 0.1˜5 wt %, K2O 7˜13 wt %, MgO 7˜14 wt %, CaO 0˜4 wt %, SrO 7˜12 wt % and SO3 0.01˜0.5 wt %. The glass substrate prepared by using the above composition shows less thermal deformation at a baking process under a high temperature since the strain point of the glass is at least 570° C., does not have such disadvantages as increase of fuel cost and short life cycle of refractories resulted from less than 1460° C. of melting point, and has 80˜95×l0?7/° C. of thermal expansion coefficient in the temperature range of 50˜350° C. Therefore, the glass according to the present invention is suitable as a substrate.

Abstract: A colored glass is provided that includes a base material and a colorant including Fe2O3 and Se. The Fe2O3 and Se are combined in the frit or glass as a Fe2O3—Se complex before being added with the base material.

Abstract: As a jig material to use under plasma reaction for producing semiconductors the present invention provides a quartz glass having resistance against plasma corrosion, particularly corrosion resistance against fluorine-based plasma gases, and which is usable without causing anomalies to silicon wafers; the present invention furthermore provides a quartz glass jig, and a method for producing the same. A quartz glass containing 0.1 to 20 wt % in total of two or more types of metallic elements, said metallic elements comprising at least one type of metallic element selected from Group 3B of the periodic table as a first metallic element and at least one type of metallic element selected from the group consisting of Mg, Ca, Sr, Ba, Sc, Y, Ti, Zr, Hf, lanthanoids, and actinoids as a second metallic element, provided that the maximum concentration of each of the second metallic elements is 1.0 wt % or less.

Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Abstract: A glass composition is characterized by having little batch-to-batch variations in the properties of the glass products made thereof. The glass composition contains 40 to 99 wt. % SiO2 with a softening temperature ranging from 600° C. to 1650° C., and wherein the standard deviation of softening temperature measurements obtained from 10 or more randomly selected samples of glass articles produced from the lot is 10° C. or less.

Abstract: An opalescent glass-ceramic product, especially for use as a dental material or as an additive to or component of dental material, including SiO2, Al2O3, P2O5, Na2O, K2O, CaO and Me(IV))O2. In order to obtain improved opalescence with improved transparency, in addition to fluorescence, thermal expansion and a combustion temperature adapted to other materials, the opalescent ceramic product is completely or substantially devoid of ZrO2 and TiO2, such that the Me(II)O content in the glass ceramic is less than approximately 4 wt % and the Me(IV)O2 content amounts to approximately 0.5-3 wt %. The invention also relates to a method for the production of the opalescent glass-ceramic product.