Abstract: Certain example embodiments relate to improved seals for glass articles. Certain example embodiments relate to a composition used for sealing an insulted glass unit. In certain example embodiments the composition includes vanadium oxide, barium oxide, zinc oxide, and at least one additional additive. For instance, another additive that is a different metal oxide or different metal chloride may be provided. In certain example embodiments, a vacuum insulated glass unit includes first and second glass substrates that are sealed together with a seal that includes the above-described composition.

Abstract: A lead-free glass material for sealing organic EL elements is provided with which satisfactory sealing quality is obtained through laser sealing without requiring the addition of a metallic powder. The lead-free glass material for sealing organic EL elements has a glass composition which comprises, in terms of mol %, 30-60% V2O5, 5-20% ZnO, 5-20% BaO, 15-40% TeO2, 0-7% Nb2O5, 0-7% Al2O3, 0-5% SiO2, 0-5% MgO, 0-5% Sb2O3, 0-4% CuO, and 0-4% SnO and in which Nb2O5+Al2O3 is 0.5-10%, SiO2+MgO+Sb2O3 is 0-5%, and CuO+SnO is 0-4%. The glass material has low-temperature softening properties, melt stability, and a low coefficient of thermal expansion and is inhibited from thermally adversely affecting organic EL elements The glass material can attain high sealing properties and high sealing strength in high yield.

Abstract: The present invention provides a producing method of powder particles having an average particle diameter on the order of submicrons. Specifically, the producing method is a producing method of powder particles obtained by grinding a product to be ground by using plural grinding media, wherein the grinding media including at least one kind (grinding medium A) having an average particle diameter of 0.01 to 5 times and at least one kind (grinding medium B) having an average particle diameter of 10 to 450 times, with respect to the average particle diameter of the product to be ground before being ground, are used.

Abstract: A glass composition for lamps includes the following by weight percent: SiO2: 60-75 wt %; CeO2+Ce2O3: 0.01-5.2 wt %; SnO+SnO2: 0.01-5.2 wt %; Al2O3: 0.5-6 wt %; B2O3: 0-5 wt %; Li2O+Na2O+K2O: 13-20 wt %; MgO: 0.5-5 wt %; CaO: 1-10 wt %; SrO: 0-10 wt %; BaO: 0-10 wt %; ZnO: 0-10 wt %; Fe2O3+FeO: 0-0.2 wt %; and TiO2: 0-1 wt %. The glass composition for lamps that contains no lead or antimony achieves high ultraviolet screening capacity, ensuring fewer occurrences of initial coloring and ultraviolet ray caused coloring of glass.

Abstract: A colored glass has a formula of R?20—RO—SiO2, wherein R? is an alkali metal element and R is an alkaline earth metal element. The colored glass comprises between 0.01 and 1% by weight of molybdenum expressed as MoO3 and between 0.01 and 2.5% by weight of sulfur expressed as SO3. The colored glass further comprises between 7.8 and 14% by weight of potassium expressed as K2O and between 0.68 and 5.42% by weight of sodium expressed as Na2O. The sum of the concentrations of potassium and sodium expressed as K2O and Na2O is between 11 and 17% by weight.

Abstract: A cathode ray tube includes a panel with a sealing surface, and a funnel with a sealing surface contacting the sealing surface of the panel. The panel and the funnel each have a thickness varied at the sealing surface thereof.

Abstract: A display apparatus includes a face plate that constitutes a part of a vacuum envelope, a phosphor layer formed on an inner surface of the face plate, and an electron beam source that emits electron beams to the phosphor layer. The face plate includes a light-emitting glass layer containing a light-emitting substance that emits light when electron beams are projected thereon. By extracting energy of electron beams, which have reached the face plate, as light, it is possible to reduce browning that occurs in the face plate and improve brightness of a display image significantly.

Abstract: The present invention is to obtain a glass bulb of reduced weight, and high safeness and reliability by ion exchanging which assures a compressive stress layer having an effective thickness even to a large tensile vacuum stress. For this purpose, a region in an outer surface of a body portion 4 of the glass funnel, the region having a small mechanical strength and producing the maximum tensile vacuum stress thereby causing breakage easily, is partly strengthened by ion exchanging method according to an electric field assisting method and an ion exchanging method using paste in combination, whereby a portion 9 strengthened by ion exchanging method is provided in that region wherein the concentration of doped ions in a strengthened compressive stress layer is distributed according to a substantially step function in a direction from the surface of the glass toward the inside of it.

Abstract: The present invention provides colored glass containing no hazardous substances, such as CdS, CdSe and PbCrO4, and used for lamps and covers for lighting, a colored glass bulb with yellow to orange color produced by using said colored glass, and a method for producing said colored glass and said colored glass bulb. Glass composition having a formula of R?2O—RO—SiO2 (wherein R? is an alkali metal element and R is an alkaline earth metal element) is added with 0.01–0.6 of weight ratio of Mo (molybdenum) as MoO3 and 0.01–1.0 of weight ratio of S to obtain the colored glass and the colored glass bulb therefrom. The colored glass having a formula of R?2O—RO—SiO2 is formed to a desired shape to obtain the colored glass bulb, and the shaped hollow article is heated to 400–620° C. to apply a coloring treatment thereto.

Abstract: The present invention provides a formed type flat panel made of tinted glass, which is capable of satisfying the UL standard for implosion resistance thereof. The formed type flat panel of the present invention includes a substantially rectangular faceplate having an substantially flat external surface and a curved inner surface; a skirt portion extending backward from a periphery of the faceplate; a corner portion joining the faceplate and the skirt portion. The faceplate has a specially tailored thickness distribution so at to accomplish aforementioned capability.

Abstract: An image display device having a vacuum envelope which has a light transmissible panel, a funnel and a neck, its inside held vacuum, a phosphor layer is formed on the inside surface of the light transmissible panel, an electron gun is disposed within the neck. An antistatic film which contains high-resistance fine particles having a specific resistivity of 106 to 109 ?·cm is formed on inside wall of the neck. The image display device is free from deterioration of display characteristics caused by a change of the track of electrons emitted by the application of voltage, a spark in a tube, or a leakage current.

Abstract: A method for producing CRT funnel glass having a glass composition containing MgO, CaO, SrO, BaO and ZnO as essential components. Further, the total content of MgO, CaO, SrO, BaO and ZnO falls within a range of 5 to 13 mass %. As a glass material of the CRT funnel glass, CRT panel glass or CRT neck glass may be used. The method comprises preparing the glass material so as to contain MgO, CaO, SrO, BaO, and ZnO as essential components and so that the total content of MgO+CaO+SrO+BaO+ZnO falls within a range of 5 to 13 mass %; and melting the glass material.

Abstract: This is a cathode ray tube having a panel provided with a colored layer on an outer surface of a face portion, wherein an emission luminance ratio is 75% or higher in a lowest part relative to a highest part, and a diffuse reflectance ratio is 90% or higher in a lowest part relative to a highest part in an image display area of the face portion. Due to this configuration, a cathode ray tube with a natural appearance can be obtained in which a luminance difference or a contrast difference is not perceived in the entire area of the face portion.

Abstract: A glass funnel for a cathode ray tube, which has a substantially rectangular opened end at one end and a neck portion at the other end and which constitutes, together with a glass panel having a substantially rectangular face portion, a glass bulb to be used for a cathode ray tube, wherein the glass constituting the glass funnel contains, by molar percentage, at least 60% of SiO2 and at least 7% of PbO; when the molar percentages of Na2O and K2O contained in said glass are represented by WNa and WK, respectively, 0.35?WK/(WNa+WK)?0.6; a compressive stress layer is formed by chemical tempering at least in the outer surface of a region containing a position where the tensile stress formed when the interior of the glass bulb is vacuumed to produce the cathode ray tube, becomes maximum; and either one or both of the outer surface of the chemically tempered region and the inner surface opposite to said outer surface, are colored by ion exchange coloration.

Abstract: In order to suppress production of devitrifying stones such as barium disilicate and strontium silicate and to achieve a high X-ray absorbability, a CRT panel glass does not substantially contain PbO and contains, in mass percent, 9-9.5% SrO and 8.5-9% BaO. In addition, the value of SrO/(SrO+BaO) is set to 0.50-0.53. Therefore, the CRT panel glass has an X-ray absorption coefficient of 28.0 cm−1 or more at 0.6 Å.

Abstract: A glass panel for a color cathode ray tube, which has a linear absorption coefficient of X-ray with a wavelength of 0.06 nm of from 30 to 38 cm−1 and which has a layer having a compression stress of at least 70 MPa formed by a chemical strengthening method at least at short axis end portions and/or long axis end portions of the outer surface of a face portion and at a center portion of the inner surface of the face portion.

Abstract: A light-absorptive antireflection film comprising a light-absorptive film formed on a glass substrate containing pigment microparticles and having a physical thickness of not less than 10 nm and an antireflection multilayer film attenuating reflected light of incident light by interference of light, wherein at least one layer of the antireflection multilayer film is an electroconductive thin film having a surface resistance of not more than 1000 &OHgr;/□, and a display device including the same and methods of producing them.

Abstract: The present invention relates to a color cathode ray tube and a glass frit to be used for it, and provides a color cathode ray tube which uses a glass frit containing as a crystallizing filler, an &agr;-4PbO.B2O3 crystal powder and/or a Pb3O4 crystal powder, and corpuscular &agr;-alumina, and at least one member selected from the group consisting of MgO, Fe2O3 and monoclinic ZrO2, for improvement of the strength at a sealed portion and for weight saving of the color cathode ray tube, wherein the maximum tensile stress generated at the above sealed portion is from 7 to 10 MPa when the inside is vacuumized, and the area ratio of crystal is at least 50% at the interface at the above sealed portion at at least the region at which the above maximum tensile stress is generated.

Abstract: A glass funnel for a cathode ray tube, which has a substantially rectangular opened end at one end and a neck portion at the other end and which constitutes, together with a glass panel having a substantially rectangular face portion, a glass bulb to be used for a cathode ray tube, wherein the glass constituting the glass funnel contains, by molar percentage, at least 60% of SiO2 and at least 7% of PbO; when the molar percentages of Na2O and K2O contained in said glass are represented by WNa and WK, respectively, 0.35≦WK/(WNa+WK)≦0.6; a compressive stress layer is formed by chemical tempering at least in the outer surface of a region containing a position where the tensile stress formed when the interior of the glass bulb is vacuumed to produce the cathode ray tube, becomes maximum; and either one or both of the outer surface of the chemically tempered region and the inner surface opposite to said outer surface, are colored by ion exchange coloration.

Abstract: When a face portion 4 of a panel portion 1 has a central wall thickness of TC, an end of a useful screen area has a wall thickness of TL, a sealing end surface of a skirt portion has is a width of TS, and an intermediate part of a body portion 7 of a funnel portion 2 is TF, there are established the formulas of; TL/TC≧1.70, TS/TL=0.43−0.50, and TF/TC=0.37−0.49, and a strengthened compressive stress of 5-14 MPa is applied to a side of the skirt portion.

Abstract: A panel for a color cathode ray tube includes an opening portion provided with a seal end surface to which a funnel is sealed through a frit glass. The seal end surface of the opening portion is a rough surface comprising a large number of streak-shape ridges and troughs in which minute recesses and protrusions range in a circumference direction of the seal end surface.

Abstract: A CRT funnel of a non beam-index type is made of a lead glass which contains 10-30 mass % of PbO and has an X-ray absorption coefficient of 40 cm−1 or more at 0.6 Å. The lead glass further contains Sb2O3 and an additive including at least one of CeO2 and SnO2. In case where the additive includes CeO2, it is preferable that the content of CeO2 is not smaller than 0.01 mass % and is smaller than 0.5 mass %. In case where the additive includes SnO2, the content of SnO2 preferably falls within a range of 0.001-2 mass %.

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: For use in a color cathode ray tube (CRT) having a display screen with a flat outer surface and a curved inner surface, a 2-layer antistatic and antireflective coating for the display screen's flat outer surface compensates for the variation in screen thickness to provide uniform light transmission through the screen and coating combination, a high degree of video image contrast, effective electrostatic shielding and discharge, and reduced light reflectivity. The coating includes a first inner electrically conductive layer disposed on the CRT display screen's flat outer surface containing carbon black particles for a high level of video image contrast and improved electrical conductivity for electrostatic shielding and discharge. The extent of light transmission through the inner conductive layer may be adjusted in accordance with the display screen's thickness by varying the amount of carbon black particles in the coating solution.

Abstract: A glass for a cathode ray tube which glass can be decreased in thickness and weight, a glass panel for a cathode ray tube, a cathode ray tube and methods for producing them. Strengthened glass having a high bending strength and a thick stress-strain layer, a glass for a display which is made of the strengthened glass, particularly, a glass panel for a cathode ray tube and a cathode ray tube. The glasses include (1) a glass for a cathode ray tube which is made of a chemically strengthened glass and has a Young's modulus of at least 90 GPa, (2) a glass for a cathode ray tube, which is a chemically strengthened glass from a matrix glass which contains SiO2, Al2O3, an alkali metal oxide, SrO and ZrO2 and has an Al2O3 content of more than 4% by weight but not more than 20% by weight and an SrO content of 5 to 20% by weight, and (3) a strengthened glass formed by chemical strengthening of a physically strengthened matrix glass at a temperature lower than the strain temperature of the matrix glass.

Abstract: A cathode ray tube (1) comprises an electrically conductive layer (10) shielding against alternating electric fields produced by the deflection unit (5). The electrically conductive layer (10), including an electrically conductive polymer, is provided on at least a part of the funnel portion (6) of the tube (1). The electrically conductive polymer is preferably chosen from the group of polythiophenes. Good results were obtained with a layer comprising poly-3,4-ethylene dioxythiophene. Application of this compound prevents the occurrence of damage to the tube by arcing phenomena and thus reduces the necessity of an insulating film between the tube (1) and the deflection unit (5).

Abstract: The present invention relates to a color cathode ray tube and a glass frit to be used for it, and provides a color cathode ray tube which uses a glass frit containing as a crystallizing filler, an &agr;-4PbO.B2O3 crystal powder and/or a Pb3O4 crystal powder, and corpuscular &agr;-alumina, and at least one member selected from the group consisting of MgO, Fe2O3 and monoclinic ZrO2, for improvement of the strength at a sealed portion and for weight saving of the color cathode ray tube, wherein the maximum tensile stress generated at the above sealed portion is from 7 to 10 MPa when the inside is vacuumized, and the area ratio of crystal is at least 50% at the interface at the above sealed portion at at least the region at which the above maximum tensile stress is generated.

Abstract: A display device includes a display screen, a surface of which is provided with an anti-reflection filter having a conducting layer having metallic particles and transparent areas. The conducting layer is provided with a transparent layer. The transparent layer has a thickness smaller than or equal to the thickness of the conducting layer. The display screen is provided with at least one electrically conducting strip having a metal layer and an adhesive layer provided with electrically conducting particles. The electrically conducting strip is in local electrical contact with the metallic particles of the anti-reflection filter via the conducting particles of the adhesive layer.

Abstract: A process for recovering rare-earth phosphors from an interior of a lamp envelope (12). The interior of the envelope defines a wall and a base layer (14) is adhered to the wall. A coating layer (16) having the rare-earth phosphors is adhered to the base layer. The process includes flowing a gas through the envelope at a rate sufficient to remove particles of the coating layer but not the base layer. The process also includes collecting the particles of the coating layer, the particles containing the rare-earth phosphors. Lamp envelopes (12) having a base layer (14) and a phosphor coating layer (16) suitable for use with the recycling method are also discussed.

Abstract: A cathode ray tube comprises a display and a funnel envelope. The funnel envelope comprises a thixotropic material. The thixotropic material thixotropic material is selected from at least one of thixotropic magnesium, thixotropic magnesium alloys, thixotropic aluminum, thixotropic aluminum alloys, or mixtures thereof or combinations.

Abstract: A substantially rectangular glass panel for a cathode ray tube is made of a glass having a linear X-ray absorption coefficient of at least 34 cm−1 at a wavelength of 0.6 Å, with the dimensions of the panel satisfying the condition of 0.07≦T/D≦0.09; and the panel is prestressed so that the surface of the face of the panel has a residual compressive stress ranging from 5 to 25 MPa, wherein T is the central thickness of the face of the panel in inches and D is the maximum diagonal line length of the face of the panel in inches.

Abstract: The present invention provides an electric shielding and anti-glaring multi-layer coating for cathode ray tube, and the method for making the same. A plurality of sputtering layers are formed on the outer surface of the glass panel of the CRT. An anti-glaring layer is formed on the outer surface of the sputtering layers by spraying. The plurality of sputtering layers contains conductive material such as ITO and having a protective layer to protect the conductive layer from acid corrosion. The multi-layer coating also has anti-reflection property in wide spectral range, and also has good hardness and resistance to fingerprint.

Abstract: In an X-ray absorbing CRT bulb glass containing 10-40 weight % PbO and having an absorption coefficient not smaller than 40 cm−1 with respect to an X-ray having a wavelength of 0.6 angstrom, the glass contains 0.06-10 weight % Fe2O3 to thereby suppress lead from leaching into water in the atmosphere or in the ground where the CRT is wasted and dumped, so as to avoid the environmental pollution by the lead leached in the ground.

Abstract: In an X-ray absorbing CRT bulb glass containing 10-40 weight % PbO and having an absorption coefficient not smaller than 40 cm−1 with respect to an X-ray having a wavelength of 0.6 angstrom, the glass contains 0.06-10 weight % Fe2O3 to thereby suppress lead from leaching into water in the atmosphere or in the ground where the CRT is wasted and dumped, so as to avoid the environmental pollution by the lead leached in the ground.

Abstract: A display screen, in particular a color display screen for a cathode ray tube, comprises a phosphor layer which includes a phosphor composition of a phosphor with a coating comprising a water-soluble organic binder, which is selected from the group formed by the polyurethanes, polyacrylamides, polyamide resins, etherified melamine compounds and melamine-formaldehyde compounds, and etherified urea-formaldehyde resins, and comprising oxygen compounds of one or more elements selected from the group formed by the alkaline earth elements and zinc. Important advantages obtained are a substantially improved sieving behavior of the phosphor powder, an increased adhesion of pigment particles to the phosphor grains, an improved suspension stability as well as an improved adhesion of the phosphor to the display screen glass.

Abstract: Picture display device with an evacuated tube comprising, around a longitudinal axis (20), a display window (2), a conical portion (4) and a neck portion (5), said conical portion (4) being connected to an upstanding wall (15) of the display window (2). The conical portion (4) has a reduced wall thickness. The conical portion is preferably provided with a coating (17) having a layer thickness of preferably less than 50 &mgr;m. The coating preferably comprises a layer of polyurethane.

Abstract: The present invention provides glass for a fluorescent lamp, comprising: CeO2 of 0.1% to 1.0%, Sb2O3 of 0.05% or lower, SiO2 of 60% to 75%, Al2O3 of 0.5% to 10%, B2O3 of 0% to 5%, CaO of 0% to 8%, MgO of 0% to 8%, SrO of 0% to 15%, BaO of 1% to 12%, R2O of 13% to 22% (R represents Li, Na or K), Fe2O3 of 0% to 0.2%, TiO2 of 0% to 1.0%, and PbO of 0.05% or lower, the percent each being by mass; a glass tube for a fluorescent lamp comprises the above glass; and a fluorescent lamp comprises the above glass tube as an envelope.

Abstract: There are provided a composition for forming a conductive layer comprising 0.01˜0.1% by weight of a conductive black pigment, 0.05˜10% by weight of a binder,0.01˜50% by weight of a conductive agent, and the remaining amount of a solvent on the basis of the total weight of the composition, and a cathode ray tube (CRT) having the conductive layer formed by coating the composition on the outer surface of a panel, drying and heating the same, and a protective layer formed on the conductive layer. The conductive layer formed using the composition has excellent conductivity, contrast characteristics and film properties. Also, a clean color purity and high-quality body color are attained.

Abstract: The lead-free bismuth-containing silicate glasses, which are particularly suitable for use as funnel glass or neck glass for cathode ray tubes and as soldering glass, have the following respective compositions (in % by weight, based on oxide): SiO2 40-60; Bi2O3, 10-30; ZrO2, 0-3; Al2O3, 0.5-5; MgO, 0-6; CaO, 0.5-5; SrO, 1-15; BaO, 0-15; sum of the alkaline earth metal oxides, 2-20; ZnO, 0-2; Li2O, 0-10; Na2O, 1-10; K2O, 2-10; Cs2O, 0-3, sum of the alkali metal oxides, 5-20; CeO2, 0-8; WO3, 0.5-5; MoO3, 0-5 and Sb2O3, 0-0.6; and SiO2 30-50; Bi2O3, 20-40; ZrO2, 0-3; Al2O3, 0.5-5; MgO, 0-4; CaO, 0.5-4; SrO, 1-15; BaO, 0-15; sum of the alkaline earth metal oxides, 2-20; ZnO, 0-2; Li2O, 0-5; Na2O, 1-12; K2O, 2-15; Cs2O, 0-3, sum of the alkali metal oxides, 5-20; CeO2, 0-8; WO3, 0.5-5; MoO3, 0-5 and Sb2O3, 0-0.6.

Abstract: A cathode ray tube (CRT) having a phosphor screen in which red, green, and blue phosphors are located in a black matrix in a pattern, at the inside of a panel, a low-reflectivity coating layer located at the outside of the panel, the low-reflectivity coating layer having a reflectivity of 2.0% or less near 480˜600 nm, wherein the panel is glass containing neodymium (Nd) in a concentration of 0.1˜1.5 wt % and praseodymium (Pr) in a concentration of 0.1˜0.7 wt %. The CRT has improved brightness and contrast characteristics, and has an enlarged color reproduction range. Also, the problem of the unattractive color of the CRT itself under an external illumination is solved.

Abstract: A cathode ray tube (CRT) includes a base film and a reflection preventing multiple layer film on one surface of the base film, an adhesive layer on the other surface of the base film, including an adhesive polymer resin, and at least one organic or inorganic pigment or dye having a main light absorption region including a wavelength of 490 or 575 nm. The reflection preventing multiple layer film has, alternately stacked, a high refractive layer and a low refractive layer. The functional film has a wide application range, e.g., from a dark tint panel having low light transmission to a clear panel having a light transmission of 80% or more. A CRT having such a functional film has improved contrast characteristics and provides a high quality of picture and good color. The film is attached to the external surface of the glass panel at room temperature so that physical and other characteristics of the CRT are not adversely affected by sintering at a high temperature.

Abstract: A Braun tube having an antibacterial coating film, which is manufactured by the steps of dispersing titanium dioxide (TiO2) in alcohol to prepare a dispersion. Then, the dispersion is coated on a Braun tube, and a thermal treatment is then performed. By a photocatalytic reaction of the titanium dioxide contained in the antibacterial coating film, oxygen (O2) and water (H2O) in the air are decomposed into superoxides (O2−) and hydroxy radicals (OH·), which destroy bacteria and mold around the Braun tube and remove bad odor.

Abstract: There is provided a field leakage preventing coating for a cathode ray tube, including a vacuum envelope having a panel section, a neck section and a funnel section connecting the panel section and the neck section; a fluorescent film applied on an inner face of the panel section; and an electron gun, mounted in the neck section, for emitting three electron beams toward the fluorescent film. The field leakage preventing coating is formed by adhering a double coating film composed of a conductive first layer mainly composed of particles of one or more kinds of metal among noble metal elements of gold (Au), silver (Ag) and platinum (Pt) and a second layer mainly composed of silicon dioxide (SiO2) or magnesium fluoride (MgF2) on an outer face of a faceplate of a panel section of the color cathode ray tube.

Abstract: A light-absorptive antireflection film comprising a light-absorptive film formed on a glass substrate containing pigment microparticles and having a physical thickness of not less than 10 nm and an antireflection multilayer film attenuating reflected light of incident light by interference of light, wherein at least one layer of the antireflection multilayer film is an electroconductive thin film having a surface resistance of not more than 1000 &OHgr;/□, and a display device including the same and methods of producing them.

Abstract: A funnel glass containing PbO for a cathode ray tube, wherein when the composition is represented by wt % based on oxides, the content of SrO is at least 1.0 wt %, the content of BaO is at least 1.0 wt %, and the ratio of the content of PbO to the total amount of PbO, SrO, BaO, CaO and MgO, is at most 0.69, and whereby the lead elution A of the glass as measured by the following method A is at most 1.0 &mgr;g/cm2, and the X-ray absorption coefficient at a wavelength of 0.6 Å is at least 40 cm−1: Method A: The glass is immersed in distilled and deionized water at 90° C. for 20 hours, whereupon the glass is taken out, and the amount of lead in the distilled and deionized water is measured by inductively coupled plasma emission spectrometry, and the measured value of the amount of lead is divided by the surface area of the glass, and the product is taken as the lead elution A.

Abstract: A cathode ray tube with an improved tubular glass neck member having a softening point in the range of 640-650° C., an annealing temperature in the range of 460-472° C., a strain point in the range of 420-425° C., a coefficient of thermal expansion in the range of 94-97×10−7/° C., and a linear x-ray absorption value of at least 100 cm−1 and a composition, as calculated in weight % on an oxide basis, consisting essentially of 46.5-49.5% SiO2, 1.5-2% Al2O3, 0.5-1.5% Na2O, 10-12% K2O, 2-3% SrO, 1-1.8% BaO, 32-34% PbO, 1-1.5% ZnO and a fining agent.

Abstract: A color cathode ray tube having a panel glass and a funnel glass sealed with a composition comprising a low melting glass containing PbO as the main component, wherein the sealed portion is such that the weight reduction after being immersed in water at 90.degree. C. for 20 hours, is at most 1 mg/cm.sup.2, and the weight reduction after being immersed in a 10% nitric acid solution at 40.degree. C. for 20 minutes, is from 80 to 700 mg/cm.sup.2.

Abstract: A second film that contains a substance that secures the conductivity of conductive particles is formed on a first film that contains the conductive particles. The first film and the second film are sintered at the same time. Thus, a conductive anti-reflection film having a sufficiently low surface resistance with a sufficient transmissivity for a high transparency can be obtained with high cost performance. When the conductive anti-reflection film is used for a cathode ray tube, it can almost prevent the AEF (Alternating Electric Field), display a picture in high quality, and be excellent in cost performance.

Abstract: The present invention provides an inexpensive cathode ray tube envelope which suffers considerably diminished glass browning in comparison with traditional cathode ray tube envelopes. The method of reducing glass browning in cathode ray tubes, and a suitable glass composite and glass composition are also provided. The cathode ray tube envelope of the present invention includes a screen which has an inner and an outer glass layers. The inner layer is made of lead-free glass whereas the outer layer is made of lead-containing glass. In the operational cathode ray tube of the present invention, the electron beams emitted therein, are absorbed by the inner layer without substantial browning, since the inner layer does not contain material that cause browning, and do not penetrate to the lead-containing outer layer. At the same time, the X-rays produced in the cathode ray tube are effectively and efficiently blocked by the lead-containing outer layer.

Abstract: The display screen (3) of a cathode ray tube (1) is provided with an antistatic coating (8) which comprises conductive, for example ATO (Sb:SnO.sub.2) particles. The coating comprises at least one additional layer (10) of silicon dioxide to obtain an antireflective effect.