Abstract: The present invention relates to glass-ceramic materials, processes for making the same and articles comprising the same. The glass-ceramic material has a composition, by weight of the total composition, comprising 55-68% SiO2; 18-24% Al2O3; 3.3-4.1% Li2O; 1.5-4.0% ZnO; 1.5-5.0% MgO; 2-5% TiO2; 0-2% ZrO2; 0-5% B2O3; 0-8% P2O5; 0-2% Na2O, 0-2% K2O; and at least one component resulting from an effective amount of at least one fining agent; wherein: the total of B2O3 and P2O5 is at least 1.5% by weight, the total of MgO and ZnO is at least about 3.5% by weight, the total of Na2O and K2O is less than about 3.0% by weight, the total of P2O5, B2O3, Na2O and K2O is less than about 11% by weight, the weight ratio of the sum total of Na2O+K2O to the sum total of P2O5+B2O3 ( Na 2 ? O + K 2 ? O B 2 ? O 3 + P 2 ? O 5 ) is less than about 0.

Abstract: The present application discloses: (i) novel glass-ceramic materials containing a solid solution of b-quartz or of ?-spodumene as main crystalline phase(s); (ii) articles made from said novel glass-ceramic materials; (iii) lithium alumino-silicate glasses, precursors of such novel glass-ceramic materials; and (iv) methods for preparing the aforesaid novel glass-ceramic materials and the aforesaid articles made of said novel glass-ceramic materials. The present invention relates to the use of SnO2 (0.15 to 0.3% by weight) and CeO2 and/or MnO2 (0.7 to 1.5% by weight), as an agent for fining the glass-ceramic material glass precursor.

Abstract: The invention relates to: a method of preparing glass-ceramics of ?-quartz and/or of ?-spodumene; a method of preparing articles made from said glass-ceramics; novel glass-ceramics of ?-quartz and/or of ?-spodumene; articles made from said novel glass-ceramics; and lithium aluminosilicate glasses, which are precursors of such novel glass-ceramics. The present invention relates to the use, as agent for fining the glass-ceramic glass precursor, of fluorine and at least one oxide of a multivalent element.

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: The present invention relates to novel compounds of the naphthopyran type which have an annelated carbocycle in position 5,6. These compounds are of formula (I) given below: in which A is an alicyclic ring which is optionally annelated with an aromatic ring and in which two adjacent R3 can together form at least one ring, for example a benzo group. These compounds (I) possess interesting photochromic properties. The invention also relates to the method of preparing these compounds (I), as well as their applications as photochromes and compositions and (co)polymer matrices comprising them.

Abstract: Thermochromic material comprising a thermochromic component and a binder, wherein the thermochromic component is crystal phases based on oxides of heavy metals of I, II, III, IV, V, VI, VII, VIII groups of the Periodic System selected from the group consisting of compounds of the following general formulae: (i) (Bi2O3)1-z(MxOy)z where z=0–0.

Abstract: The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56-67% SiO2; 9-22% Al2O3; 3.4-3.8% Li2O; 1.8-2.6% ZnO; 1.5-2.5% MgO; 3.3-5% TiO2; 0-2.5% ZrO2; 1.5-3% B2O3; 0-6% P2O5; 0-0.6% F; less than 500 ppm Fe; and components resulting from effective amount of at least one refining agent. The glass-ceramic material of the present invention contains ?-spodumene solid solution as the predominant crystalline phase, and can be obtained by proper thermal treatment of the glass-ceramic material.

Abstract: Disclosed are high temperature free-flow mold for the production of near net-shape silica articles and method for the production of near net-shape silica articles. The mold is preferably made of graphite, preferably coated with SiC on the surfaces of the mold cavity. The mold and the process use no or less refractory elastic materials than that disclosed in the prior art, and does not alter or contaminate the glass composition. The mold the process are particularly suitable for the production of high purity silica articles for use in VUV and EUV lithographic devices.

Abstract: The present invention relates to novel cross-linkable or crosslinked photochromic compositions, articles made from or coated with the compositions and method of making the compositions. The compositions contain (i) at least one segmented or non-segmented polyurethane-type or polyurethane-urea-type linear polymer having at least one non-terminal moiety that comprises at least one unsaturated group; and (ii) an effective amount of at least one photochromic organic compound, advantageously selected from spiroxazines, chromenes, spiropyrans fulgides and fulgimides.

Abstract: Disclosed are photo or electron beam polymerizable compositions, and preparation thereof and devices containing them. The composition contains completely or substantially completely hydrogenated hydrocarbon-based material completely free or substantially free of carbon-carbon double and triple bonds containing photo or electron beam curable terminal or pendant groups, low-outgassing photoinitiators, an optional viscosity adjustment component and an optional filler. The composition is visible light, UV or electron beam curable. It cures into a low-modulus, low outgassing polymer material. The composition can be used as an adhesive, sealant or lens potting material. It is ideal for use in lithographic tools involving deep or vacuum ultraviolet radiations, in particular, as lens potting materials for 157 nm lithographic tools.

Abstract: Disclosed are novel benzo-, naphtho- and phenanthrochromenes substituted by carbamated or ureated phenyls having the following general formula (I): wherein R1 represents a group their preparation, photochromic compositions and articles containing them. This family of compounds have interesting and useful photochromic properties, especially in terms of absorption band and discoloration speed.

Abstract: Disclosed are photo or electron beam curable polymerizable compositions, and preparation thereof and devices containing such cured material. The composition contains completely or substantially completely hydrogenated hydrocarbon-based material completely free or substantially free of carbon-carbon double and triple bonds containing photo or electron beam curable terminal or pendant groups, low-outgassing photoinitiators, an optional viscosity adjustment component and an optional filler. The composition is visible light, UV or electron beam curable. It cures into a low-modulus, low outgassing polymer material. The composition can be used as an adhesive, sealant or lens potting material. It is ideal for use in lithographic tools and other optical devices involving deep or vacuum ultraviolet radiations, in particular, as lens potting materials for 248 nm, 193 nm and 157 nm lithographic tools, as well as other optical devices involving using high fluence irradiation.

Abstract: The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56–67% SiO2; 9–22% Al2O3; 3.4–3.8% Li2O; 1.8–2.6% ZnO; 1.5–2.5% MgO; 3.3–5% TiO2; 0–2.5% ZrO2; 1.5–3% B2O3; 0–6% P2O5; 0–0.6% F; less than 500 ppm Fe; and components resulting from effective amount of at least one refining agent. The glass-ceramic material of the present invention contains ?-spodumene solid solution as the predominant crystalline phase, and can be obtained by proper thermal treatment of the glass-ceramic material.

Abstract: The present invention relates to a product, comprising a body which is delimited by a surface, of a lithium aluminosilicate-based glass-ceramic, as well as to its method of preparation. Characteristically, said glass-ceramic has, on at least one part of said surface, a surface layer the degree of crystallization of which is greater than that of said glass-ceramic within said body.

Abstract: The present invention relates to novel glass and glass-ceramic materials, articles made from said novel glass-ceramics and to methods of preparing said novel glass-ceramics and articles. Said novel, transparent, translucent or opaque glass-ceramics, which contain, as main crystalline phase, a solid solution of ?-quartz or of ?-spodumene, essentially have the following composition, expressed as percentages by weight of oxides: 65 to 70% of SiO2; 18 to 23% of Al2O3; >4 to 5% of Li2O; 0 to <1% of MgO; 1 to 3% of ZnO; 0 to 2% of BaO; 1.8 to 4% of TiO2; 1 to 2.5% of ZrO2; 0.4 to 1% of K2O and/or Na2O; with, advantageously, an effective and non-excess amount of at least one fining agent. The glass-ceramic material is also characterized by a water content of ?-OH higher than 0.2 mm?1, preferably higher than 0.4 mm?1.

Abstract: The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56–67% SiO2; 9–22% Al2O3; 3.4–3.8% Li2O; 1.8–2.6% ZnO; 1.5–2.5% MgO; 3.3–5% TiO2; 0–2.5% ZrO2; 1.5–3% B2O3; 0–6% P2O5; 0–0.6% F; less than 500 ppm Fe; and components resulting from effective amount of at least one refining agent. The glass-ceramic material of the present invention contains ?-quartz solid solution as the predominant crystalline phase, and can be obtained by proper thermal treatment of the glass-ceramic material. The glass-ceramic material is particularly suitable for heat-resistant lamp reflectors which require a high surface smoothness Ra of lower than 75 nm, a low CTE between 25 and 300° C. of less than 10×10?7 K?1, and IR transmission at about 1050 nm of over 80% at a thickness of 3 mm.

Abstract: The present invention relates to novel mineral glasses which are cerammable and which have a composition, expressed in percentages by weight of oxides, consisting essentially of: SiO2 65–70; Al2O3 18–20.5; Li2O 2.5–3.8; MgO 0.55–1.5; ZnO 1.2–2.8; BaO 0–1.4; SrO 0–1.4; with BaO+SrO 0.4–1.4; with MgO+BaO+SrO 1.1–2.3; Na2O 0–<1; K2O 0–<1; with Na2O+K2O 0–<1; with ? ? 2.8 ? ? Li 2 ? O + 1.2 ? ZnO 5.2 ? ? MgO > 1.8 ; TiO2 1.8–3.5; ZrO2 0.8–2.5; with ? ? 2.2 < TiO 2 ZrO 2 < 4.5 ; ? preferably ? ? 2.3 < TiO 2 ZrO 2 < 4.5 ; and, optionally, an effective, non-excess amount of at least one fining agent. The present invention also relates to glass-ceramic articles made from such glass as well as processes for making such glass-ceramic articles.

Abstract: Disclosed is a method for sealing and affixing a component assembly for an electrical lighting device to a glass lamp envelope. The assembly used in the process comprises the component, such as an electrode lead wire and a solder glass perform. The process is useful, for example, in hermetically sealing and affixing lamp components, such as electrical lead wires and exhaust tubulation, to a low pressure fluorescent discharge lamp envelope having phosphor coating already applied thereto. The present invention is particularly suitable for lamp envelope made of borosilicate glass having a CTE from 0 to 300° C. in the range of 30–45×10?7° C.?1.

Abstract: Disclosed is a glass material essentially free of BaO and alkali oxide particularly suitable for the glass substrate of LCDs. The glass material consists essentially, expressed in mole percent on an oxide basis, of 70–80%, preferably 72–77% of SiO2, 3–9%, preferably 4–7% of Al2O3, 8–18%, preferably 10–16% B2O3, 3–10%, preferably 3–8% of CaO, 0–4%, preferably 0–3% RO, 0–0.2%, preferably 0–0.1% SnO, 0–1%, preferably 0 to 0.5% of XO, where RO represents, collectively, MgO, SrO and ZnO, XO represents, collectively, TiO2, ZrO2, Y2O3 and La2O3. The glass has a strain point in the range of over about 600° C., a coefficient of thermal expansion (CTE) in the range of about 23–35×10?7/° C., a density lower than about 2.35 g/cm3, a liquidus temperature lower than or equal to about 1200° C. and a durability in BHF less than or equal to 0.5 mg/cm2 weight loss.

Abstract: Disclosed are a component assembly for an electrical lighting device and method for sealing the same. The assembly comprises the component, such as an electrode lead wire, and a solder glass perform. The component assembly is useful, for example, in hermetically sealing and affixing lamp components, such as electrical lead wires and exhaust tubulation, to a low-pressure fluorescent discharge lamp envelope having phosphor coating already applied thereto without causing damage to other lamp components sensitive to high temperature. The present invention is particularly suitable for lamp envelope made of borosilicate glass having a CTE from 0 to 300° C. in the range of 30–45×10?7° C.?1.