1260 results about "Glass forming" patented technology

A bulk single phase glass comprising 23 molar % to 50 molar % rare earth oxides, RE203, and 50 molar % to 77 molar % aluminum oxide, A12O3 is provided. The glass contains at least 50 molar % of Al2O3+RE2O3 and smaller amounts of oxide glass forming agents and other oxides than are found in prior art glasses. The addition of small amounts of lanthanum oxide, La2O3, prevents phase separation. The single phase glass is useful for optical applications such as lasers and optical amplifiers.

The invention relates a powder material consisting of coated particles for a powder-based rapid generative prototyping methods, in particular by compressing a 3D binder. Said powder material consists of individual plastic, metal and/or ceramic particles and/or granules. A coating essentially consists of an adhesive agent which can be activated by a liquid binder, light or laser light, and of sinterable or glass-forming fine-grained material. Said invention also relates to a method for compressing 3D binder with the aid of an organic solvent having a water content less than 45% and to sintered bodies, in particular for moulding or precision mechanical engineering, which are fixed to each other by sintering or glass formation from a fine grained material.

The present invention significantly modifies “The Overflow Process”. It includes a method and apparatus for measuring glass flow rate and maintaining a constant glass flow rate. It also embodies design features and methods that support and stress the forming apparatus in a manner such that the deformation that results from thermal creep is corrected, thus minimizing the effect of the thermal creep on the thickness variation of the glass sheet. The present invention also embodies design features that change the process from a single step (combined flow distribution and cooling) to a two step process; step one being flow distribution and step two being cooling.

A front end for a glass forming operation comprises an open channel and at least one burner. The channel has at least one surface. The surface has at least one hole therein. The burner is oriented in the hole at an acute angle relative to the surface. In another embodiment of the invention, the channel has a top and a pair of sidewalls each having a surface. At least one hole is in at least one of the surfaces. The hole is at an acute angle relative to at least one surface. The burner is an oxygen-fired burner. In yet another embodiment of the invention, the top and sidewalls each have a super structure surface constructed of refractory material. The channel has an upstream end and a downstream end. At least one of the surfaces has a plurality of holes therein. The burners extend at an acute angle relative to at least one surface and in a plane extending between the upstream end and the downstream end and perpendicular to at least one surface. Oxygen-fired burners extend axially through corresponding holes.

A method and apparatus is disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth metal dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth metal dopant material are accomplished through a ''hybrid vapor processing'' (HVP) method or a ''hybrid liquid processing'' (HLP) method, either being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth metal halide by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth metal halide laden vapor, into a glass-forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth metal dopant is provided according to the HVP method and/or other vapor source of rare earth metal dopant which is mixed with glass-forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution comprising, a second amount of rare earth metal dopant. The tube is then thermally collapsed resulting in an optical preform with an enhanced amount of rare earth metal dopant incorporated at a comparatively high concentration. The apparatus comprises means, such as tubes, for introducing the rare earth metal dopant as a vapor, formed from a solid state form of the dopant, into the main glass deposition tube separately from glass-forming material vapors and oxygen for the reaction within the main tube.

Methods and apparatus for refining and delivering a supply of molten glass include melting a supply of glass in a melter and discharging a stream of molten glass. A refining section is provided to refine the molten glass discharged by the melter and to deliver the molten glass downstream to a glass forming apparatus. The refining section is mounted for movement into and out of contact with the stream of molten glass to connect and disconnect the glass forming apparatus with the stream of molten glass.

A method comprises flowing an oxidant and a fuel into a submerged combustion burner in a glass tank furnace, the glass tank furnace receiving a feed of glass forming material and producing molten glass, the burner and furnace comprising a melting system. The melting system has a variable system vibration and/or oscillation due to the nature of submerged combustion. One method includes predicting a value of at least one property, such as viscosity, of the molten glass using the variable system vibration and/or oscillation.

Apparatus, systems and methods for forming complex edges on a glass member through the use of a glass slumping process are disclosed. According to one aspect of the invention, a method of forming a complex edge in a glass forming process includes grinding an edge of a glass member and polishing the edge of the glass member. Grinding the edge of the glass member causes the edge of the glass member to have a first level of complexity. The method also includes performing a slumping process on the glass member. Performing the slumping process causes the edge of the glass member to have a second level of complexity that is more complex than the first level of complexity.

A method keeps the width of the manufactured sheet substantially the same by attaching edge directors for the formed sheet to the manufacturing apparatus structure instead of to the forming block. Thus, sheet glass may be manufactured to specification for a longer time with the same forming block. An additional method adjusts the width of the manufactured sheet by changing the distance between the edge directors. Thus sheet glass may be manufactured to different width specifications with the same forming block.

To provide an optically transparent film containing 0.01 to 20% by weight glass forming oxide consisting of Nb2O5, V2O5, B2O3, SiO2, and P2O6; 0.01 to 20% by weight Al2O3 or Ga2O3; and 0.01 to 5% by weight hard oxide of ZrO2 and TiO2 as required; balance being ZnO, and a sputtering target for forming such a film. This sputtering target reduces occurrence of particles during sputtering, decreases the number of interruption or discontinuance of sputtering to improve production efficiency, and forms a protective film for optical disks with large transmittance and low reflectance.

A burner for melting glass forming batch material includes a burner assembly constructed and arranged with a first passage for providing a fuel stream and a second passage for providing an oxidant stream, the first and second streams coacting to produce a supersonic combustion jet flame penetrable into glass melt. A method for melting glass forming batch material is also provided and includes providing a fuel stream; providing an oxidant stream; mixing the fuel and oxidant streams with sufficient force for providing a supersonic combustion jet flame; directing the supersonic combustion jet flame to contact the glass forming batch material; and penetrating the glass forming batch material to a select depth with the supersonic combustion jet flame.

A method for reducing corrosion of a wash water system for glass forming lines, by using a corrosion meter, is provided. Also provided is a fiberglass manufacturing process that utilizes the method.

A method of forming resistance changing elements with improved operational characteristics for use in memory devices and the resulting structures are disclosed. A chalcogenide glass having the formula (Ge_x1Se_1-x1)_1-y1Ag_y1, wherein 18≦x₁≦28, or the formula (Ge_x2Se_1-x2)_1-y2Ag_y2, wherein 39≦x₂≦42, and wherein in both the silver is in a concentration which maintains the germanium selenide glass in the glass forming region is used in a memory cell. The glass may also have a glass transition temperature (Tg) near or higher than typical temperatures used for fabricating and packaging memory devices containing the memory cell.

An optical glass having a high light transmittance, a high refractive index and excellent production stability, which contains at least one of CaO and SrO together with SiO₂, B₂O₃, La₂O₃, Nb₂O₅, TiO₂ and BaO, having a composition that substantially contains, by weight %, 1 to 18% of SiO₂, 3 to 24% of B₂O₃, provided that the ratio of content of B₂O₃ to the content of SiO₂ (B₂O₃/SiO₂) is over 1, 10 to 50% of La₂O₃, 1 to 30% of Nb₂O₅, 1 to 30% of TiO₂, over 6% but not more than 25% of BaO, less than 7% of CaO, 6% or less of SrO, 0 to 13% of MgO, provided that the total content of BaO, CaO, SrO and MgO is 40% or less, 0 to 15% of ZnO, 0 to 15% of ZrO₂, 0 to 10% of Al₂O₃, 0 to 20% of Gd₂O₃, 0% or more but less than 2% of Y₂O₃, 0 to 5% of Yb₂O₃, 0 to 18% of Ta₂O₅, 0 to 20% of Bi₂O₃, 0 to 10% of GeO₂, 0% or more but less than 2% of Sb₂O₃, and 0% or more but less than 2% of SnO₂, and having a refractive index (n_d) of over 1.8, Abbe's number (ν_d) of 28 to 40 and a density of 4.2 g/cm³ or more.

The present invention alters the flow path at the inlet of the sheet glass forming apparatus to improve quality. The bottom of the downcomer pipe is preferably shaped to alter the character of the vortex flow in the quiescent flow zone between the pipes. In another embodiment, a bead guide provides hydraulic stresses that are in opposition to the surface tension stress and thus reduces the influence of surface tension on the formation of thick beads on the edges of the sheet. The present invention also measures the temperature of the glass by immersing thermocouples in the glass, at locations where any defects caused by the immersion are in the glass that forms the unusable edges of the sheet. In another embodiment, the support structure for the trough is altered to substantially reduce the aging of the trough due to thermal creep.

Glass-forming die, such as a parsain-forming or bottle-forming die, includes a die body having a molding surface with a curved contour to form at least a portion of a glass bottle or other article to be made. The die body has one or more cooling passages inside the body wherein the cooling passages is/are non-linear (non-straight) along at least a portion of their length to improve temperature control of the die during the glass forming operation. To this end, the cooling passages are curved in a manner to generally follow the curved contour along at least a portion of the length of the curved contour, and may include heat radiating or turbulating elements in the cooling passage. The glass-forming die alternately, or in addition, can include integral cooling fins, ribs or other heat radiating element on one or more exterior regions of the die.

The optical fiber fixing member made of glass, especially optical fiber guide block, is conventionally produced by a mechanical processing. However, the mechanical processing has problems that a production cost becomes high and mass-production is difficult. The problems above can be solved by the present invention providing a method for producing an optical fiber fixing member comprising: disposing a glass shaping preform whose plane view resembles to the plane view of the molded article and whose faces to be positioned in the pressurizing direction during press-molding assumes planes or outwardly convex curved surfaces, in a mold having a cavity of a given shape; and heating the glass shaping preform up to a temperature at which the glass shaping preform can be mold-shaping and thereby press-molding it into a molded article having at least one edge formed of a free surface.

Disclosed is a magnesium based amorphous alloy having a good glass forming ability and ductility. The Mg based amorphous alloy has a composition range of Mg_100-x-yA_xB_y where x and y are respectively 2.5≦x≦30, 2.5≦y≦20 in atomic percent. Here, A includes at least one element selected from the group consisting of Cu, Ni, Zn, Al, Ag, and Pd, and B includes at least one element selected from the group consisting of Gd, Y, Ca, and Nd.

Disclosed in this invention is a family of ternary and multi-nary iron-based new compositions of bulk metallic glasses which possess promising soft magnetic properties, and the composition selection rules that lead to the design of such new compositions. The embodiment alloys are represented by the formula M_aX_bZ_c, where M represents at least one of ferromagnetic elements such as iron and may partly be replaced by some other substitute elements; X is an element or combinations of elements selected from those with atomic radius at least 130% that of iron and in the mean time is able to form an M-rich eutectic; and Z is an element or combinations of elements selected from semi-metallic or non-metallic elements with atomic radius smaller than 86% that of iron and in the meantime is able to form an M-Z eutectic; a, b, c are the atomic percentage of M, X, Z, respectively, and a+b+c=100%. When 1%<b<15% and 10%<c<39%, the alloys show a bulk glass forming ability to cast amorphous ribbons/sheets at least 0.1 mm in thickness. When 3%<b<10% and 18%<c<30%, the alloys show a bulk glass forming ability to cast amorphous rods at least 1 mm in diameter. The amorphous phase of these as-cast sheets/rods is at least 95% by volume. This invention also discloses the existence of nano-crystalline phase outside of the outer regime of the bulk glass forming region mentioned above.

A process for producing a glass molding, in which a glass molding of stable quality can be efficiently produced through minimizing of temperature fluctuation of molten glass drops at pressure molding operation; and an apparatus for production of a glass molding used in this process. Molten glass drops are fed into an inferior die by causing the molten glass drops to fall from above toward the inferior die. The arrival of molten glass drops having fallen at a given location is detected, and pressurization of the molten glass drops by means of molding dies is initiated upon the passage of a given time since the detection.

The invention relates to a molding device of glass molding articles. More specifically, the molding device of the glass molding articles comprises a pre-heating mechanism contacted with a mold body in a non-load state for pre-heating, a discharge cooling line provided with a cooling water line is formed at an outlet side of a molding chamber, the cooling time in the molding chamber is shortened, the whole molding period time of glass with a curved surface portion is further shortened, a plurality of suction holes into which vacuum pressure flows are formed at the bottom of a lower mold of the mold body, vacuum pressure absorption materials flowing into the suction holes are employed during molding motions, the glass with the excellent curved surface portion is molded, an inlet side of the molding chamber is provided with a vacuum mechanism for vacuum treatment of the mold body, and the molding device can be applied to the molding of infrared glass optical lenses.

According to a first embodiment, a refractory orifice ring of a glass forming apparatus is provided. The orifice ring includes an annular side wall and a base wall. At least one discharge hole is formed in the base wall. The discharge hole includes a top opening and a bottom opening, wherein the top opening has a surface area greater than a surface area of the bottom opening.