Abstract: A crystallized glass article having a surface pattern like granite, marble or other natural stones with a line pattern of a desired color or colors, which is formed by fusion bonding small masses of a crystallizable glass material mixed with inorganic pigment powder at a heat-treating temperature higher than the softening point. The surface pattern comprises crystallized glass areas defined by the small masses in the surface layer of the article and the colored line pattern defined by the pigment dispersed in the interfaces between adjacent ones of the small masses in the surface layer.

Abstract: Substrates for use in liquidus crystal display devices using thin film transistors, solar cells electroluminescence display devices and/or other devices having a thin film formed on the substrate are formed of a glass. The glass is essentially free from alkali metal oxide, lead oxide, and magnesium oxide, and has a high chemical resistance. The glass consists essentially, by weight, of 52-60% SiO.sub.2, 7-14% Al.sub.2 O.sub.3, 3-12% B.sub.2 O.sub.3, 3-13% CaO, 10-22% BaO, 0-10% SrO, 0-10% ZnO.

Abstract: A translucent glass brick for use in a building wall as a lighting wall is made of a translucent opal glass in a form of a hollow glass block. The opal glass has an opal appearance and a mean light transmittance of 20-80%, in a glass thickness of 10 mm, for wavelength over a range of 400-700 nm. The opal glass is a lime and chlorine free glass with sodium sulfate and sodium sulfide fine particles dispersed therein for diffusing light transmitting through the glass. The opal glass essentially consists, by weight, of SiO.sub.2 60.0-70.0%, Al.sub.2 O.sub.3 7.0-11.0%, B.sub.2 O.sub.3 1.0-5.0%, BaO 0-3.0%, ZnO 1.0-5.0%, Na.sub.2 O 15.0-21.0%, SO.sub.3 0.3-1.0%, and F.sub.2 0-2.0%.

Abstract: A sealing glass composition suitable for sealing members in semiconductor devices at a temperature below about 450.degree. C. and a comparatively low thermal expansion coefficient of about 35-50.times.10.sup.-7 /.degree.C. matching that of semiconductors. The sealing glass composition comprises 50-80 vol % solder glass powder and 20-50 vol % filler powder of a ceramic comprising, by weight, PbO 65-75%, TiO.sub.2 10-25%, Fe.sub.2 O.sub.3 1-10%, WO.sub.3 1-12%, and CaO 0-5%, so that Ti in the PbTiO.sub.3 filler is partially substituted by Fe and W. The filler powder has an average particle size of about 5 .mu.m. In use of the sealing glass composition, microcracks are absent in glass phase around the filler after sealing.

Abstract: An infrared transparent glass ceramic article is useful for top plates of cooking stoves and has a black appearance but an infrared transmittance of about 80% or more for an infrared light of a wavelength 1,500 nm, and .beta.-quartz solid solution crystals substantially alone dispersed within glassy matrix without any other crystals. The article consists essentially, by weight, of 60-72% SiO.sub.2, 14-28% Al.sub.2 O.sub.3, 2.5-5.5% Li.sub.2 O, 0.1-0.9% MgO, 0.1-0.9% ZnO, 3-6% TiO.sub.2, 0.03-0.5% V.sub.2 O.sub.5, 0.1-1% Na.sub.2 O, 0-1% K.sub.2 O, 0-2% CaO, 0-2% BaO, 0-2% PbO, 0-2% As.sub.2 O.sub.3, 0-3% ZrO.sub.2, and 0-3% P.sub.d O.sub.5. The article is produced by forming a desired shape of glass article having the ingredients, heating the glass article at a temperature of 650.degree.-800.degree. C. to nucleate in the glass, heating the glass article at a temperature of 800.degree.-950.degree. C. to thereby precipitate .beta.

Abstract: A biocompatible glass ceramic comprises, by weight, 7-16% MgO, 20-45% CaO, 41-50% SiO.sub.2, 8-30% P.sub.2 O.sub.5, 0-5% B.sub.2 O.sub.3, 0-5% F.sub.2, and 0-10% Al.sub.2 O.sub.3, and has a crystal structure where a number of fine crystals of apatite, wollastonite, and diopside are densely dispersed and interlace with one another in a glass phase. The glass ceramic is non-porous and has an increased mechanical strength of 2,000 Kg f/cm.sup.2 without degradation of the chemical bonding with the bone of the living body. The glass ceramic contains no alkali and is chemically stable in the living body. The glass ceramic is useful for replacement materials of tooth roots and crowns as well as bones.

Abstract: A sealing composition suitable for sealing alumina packages for integrated circuits at a temperature below about 450.degree. C. for a short time of about 10 minutes. The composition is a mixture of 50-80 wt % vitreous PbO-B.sub.2 O.sub.3 solder glass powder having a deformation point of 350.degree. C. or less, 0-45 wt % low thermal expansion ceramic powder and 2-40 wt % zircon powder. The zircon powder is of a synthetic zircon artificially prepared to eliminate radioactive impurities such as uranium and/or thorium and contains 0.5-7 wt % Fe.sub.2 O.sub.3, MnO and/or ZnO without alkali impurities and without non-reacted zirconium oxide. The composition has an improved flowability.

Abstract: A SiO.sub.2 13 B.sub.2 O.sub.3 fiber glass composition is disclosed which contains a reduced amount of B.sub.2 O.sub.3 in comparison with conventional D glass to thereby improve the water resistance and heat resistance. The fiber glass composition of the present invention has a dielectric constant of 4.5 or less for 1 MHz at the room temperature, a strain point of 485.degree. C. or more, and improved water resistance. The composition consists essentially of, by weight SiO.sub.2 70-80%, Al.sub.2 O.sub.3 0-2.0%, B.sub.2 O.sub.3 15.0-21.5%, MgO 0-1.0%, CaO 0-2.0%, Li.sub.2 O 0-2.0%, Na.sub.2 O 0-3.0%, and K.sub.2 O 0-3.0%, Li.sub.2 O+Na.sub.2 O+K.sub.2 O=2.0-5.0%.

Abstract: A sealing glass composition suitable for sealing members in semiconductor devices at a temperature below about 450.degree. C. for a short time and a comparatively low thermal expansion coefficient of about 33-48.times.10.sup.-7 /.degree.C. matching with semiconductors. The sealing glass composition comprises 50-80 vol % solder glass powder and 20-50 vol % filler powder of lead calcium titanate represented by (Pb.sub.1-m Ca.sub.m)TiO.sub.3 where 0<m.ltoreq.0.4.

Abstract: A sealing composition suitable for sealing alumina packages for integrated circuits at a temperature below about 450.degree. C. for a short time of about 10 minutes. The composition is a mixture of 50-80 wt % vitreous solder glass powder of PbO-B.sub.2 O.sub.3 system having a deformation point of 350.degree. C. or less, 1-35 wt % zinc material powder and 1-35 wt % zircon powder. The zircon powder is of a synthetic zircon artificially prepared to eliminate radioactive impurities such as uranium and/or thorium.

Abstract: In order to form a steam cushion between a glass and a metal mold during operation blowing the glass in the mold, the mold is provided with a large number of small holes mechanically-formed in and distributed over the inner surface of the mold for retaining water therein. Since the metallic inner surface of the mold is directly exposed to the molding cavity of the mold, the mold is not substantially subjected to abrasion and burning during the blowing operation so that the working life of the mold is extended.

Abstract: A panel glass of a color cathode ray tube exhibiting a high absorption of X-radiation and an excellent resistance to electron and/or X-ray browning, which is modified by 0.1-5.0 wt % Nd.sub.2 0.sub.3 to provide substantially higher relative light transmission in the green and in the red wavelengths of the visible spectrum and a greater selective light absorption in the yellow region of the spectrum, and which is further modified by 0.0005-0.05 wt % Cr.sub.2 O.sub.3 and 0-2 wt % Pr.sub.6 O.sub.11 to control the chromaticity value of the glass to be nearly equal to that of the light emitted from tricolor phosphor P22 and to suppress the dichroism of the glass for different ambient lights. Ingredients of the glass are as follows: 50-75% SiO.sub.2, 0-5% Al.sub.2 O.sub.3, 0-4% CaO, 0-3% MgO, 0-13% SrO, 0-16% BaO, 0-3% PbO, O-3% ZnO, 0-4% ZrO.sub.2, the sum of SrO+BaO+PbO+ZnO+ZrO.sub.2 being 5-25%, 0-4% Li.sub.2 O, 3-15% Na.sub.2 O, 2-15% K.sub.2 O, the sum of Na.sub.2 O+K.sub.2 O being 5-20%, O-2%, TiO.sub.

Abstract: In a plurality of monochromatic colored light emitted cathode ray tubes arranged in a surface to form a huge screen for displaying a colored picture, glass for use in light-source cathode ray tubes for emitting the red or the blue light has the optical characteristics that it can well pass the light in the wavelength range of the remaining blue and yellow portions of the spectrum to thereby improve contrast of the monochromatic colored red or green light source cathode ray tube. The glass essentially consists, by weight, of 50-75% SiO.sub.2, O-5% Al.sub.2 O.sub.3, 0-4% CaO, 0-2% MgO, 0-12% SrO, 0-16% BaO, 0-3% PbO, 0-3% ZnO, 0-3% ZrO.sub.2, the sum of SrO+BaO+PbO+ZnO+ZrO.sub.2 being 1.5-25%, 0-4% Li.sub.2 O, 3-15% Na.sub.2 O, 1-10% K.sub.2 O, the sum of Li.sub.2 O+Na.sub.2 O+K.sub.2 O being 5-24%, 0-2% TiO.sub.2, 0.1-3% CeO.sub.2, 1-10% Nd.sub.2 O.sub.3, 0.5-5% Pr.sub.2 O.sub.3, and 0.1-4% Fe.sub.2 O.sub.3.

Abstract: A low temperature sealing glass composition consisting of 60-80% by weight of vitreous solder glass of PbO-B.sub.2 O.sub.3 system having a deformation point of 350.degree. C. or less, and 20-40% by weight of willemite. The vitreous PbO-B.sub.2 O.sub.3 system glass comprises 70-90% by weight of PbO, 10-15% by weight of B.sub.2 O.sub.3, 0.5-5% by weight of SiO.sub.2, 0-5% by weight of Al.sub.2 O.sub.3, 0-5% by weight of ZnO, 0-15% by weight of PbF.sub.2 and 0-5% by weight of Bi.sub.2 O.sub.3.

Abstract: A work table in a glass forming unit in apparatus for producing hollow glass articles has an orifice plate which is loosely fitted in a recess of the work table. Therefore, the orifice plate can be removed or mounted on the work table instantly while the orifice plate is firmly secured to the work table during the operation of the work table because the orifice plate expands by the heat of the handled molten glass to be friction-fitted in the recess. The orifice plate is formed of material having a coefficient of thermal expansion equal to, or relatively larger than, that of the work table.

Abstract: A microwave browning vessel is provided with an electroconductive film pattern comprising a plurality of, or three or four separated sections on a lower surface of a bottom wall thereof. A browning vessel is obtained which has a bottom wall of a relatively larger area of more than 550 cm.sup.2, wherein the upper surface of the bottom wall is generally uniformly heated to uniformly brown the surface of foodstaff received on the bottom wall, when the vessel is used in the microwave oven. The area of each electroconductive film sections is restricted to 250 cm.sup.2 or less, and the sum of the areas of the film sections is at least 50% of the upper surface of the bottom wall.The vessel may be provided with a plurality of legs for supporting the vessel so that the lower surface of the bottom wall is maintained at a level of 1.0-1.7 cm higher than a surface on which the vessel is placed.

Abstract: A D.C. voltage is applied between an anode terminal and stem pins of a cathode ray tube, using the anode terminal as a negative terminal to cause cathode spot at an edge of an internal electric conductive film of the cathode ray tube. Thus, the edge of the internal electric conductive film is so conditioned that the dielectric breakdown strength of a glass neck tube of the cathode ray tube is graded up.

Abstract: Essentially dry hygroscopic dust recovered from the waste gas of a glass melting furnace is agglomerated with coarser particles of silica sand, calcium carbonate or dolomite having a moisture content of 5-20%, by weight, by intimately mixing the dust and coarser particles, and tumbling the mixture until particles of the dust are attached to the moisture-containing coarser particles.

Abstract: A crystallized glass article formed of discrete small bodies of crystallizable glass fusion-bonded together at their interfaces is characterized in that a first layer extending from the article surface to a predetermined depth is non-porous, a predetermined thickness of second layer connected to and beneath the first layer being porous. Each of the small bodies in the first layer has needle-like .beta.-wollastonite crystals extending from the surface of the body to the interior thereof in a direction perpendicular to the surface of the body. Accordingly the article is characterized by a surface pattern defined by small bodies due to the differences of orientation of needle-like .beta.-wollastonite crystals and by a reduced specific gravity.

Abstract: Molten glass is uniformly heated between a plurality of pairs of electrodes which receive electric current from a current source which includes a like plurality of transformers and a source of electric power, the primary windings of the transformers being connected in series to the power source and each secondary transformer winding being connected to an associated pair of electrodes. The transformers feed and control the electric current to equalize the current regardless of electrical resistance variations in the material due to rising temperatures.