Abstract:
A method for compressing gases in a contained volume consisting of hollow glass microspheres (17). The gases are compressed under high pressure and can be easily handled and stored. The gases to be compressed and contained in the microspheres (17) are used as blowing gases (10) to blow the microspheres. The hollow glass microspheres (17) are made by forming a liquid film (12) of molten glass across a coaxial blowing nozzle, applying the blowing gas (10) at pressure on the inner surface of the glass film to blow the film and form an elongated cylinder shaped liquid film (12) of molten glass. A transverse jet (13) is used to direct an entraining fluid (14) over and around the blowing nozzle (5) at an angle to the axis of the blowing nozzle. The entraining fluid (14) as it passes over and around the blowing nozzle (5) fluid dynamically induces a pulsating or fluctuating pressure field at the opposite or lee side of the blowing nozzle in the wake or shadow of the coaxial blowing nozzle to form into a spherical shape (17).
Abstract:
This is a way to make a glass thing with anisotropic optical properties. A preform (10) with longitudinal passages is drawn thinner by a puller (18) so as to make a rod or fiber (16).
Abstract:
Hollow glass fibres laminated materials suffer, still nowadays, from the fault of containing water and other substances. The sealing processes used up to flow still show defects which are eliminated by the invention. The hollow glass fibre receives sealing walls during the spinning operation which takes place with a protection gas comprised of an aerosol wherein the material of the tight wall is in suspension. For this purpose, small hollow glass balls are used, of which the diameter corresponds to that of the fibres. The aerosol is directed by a cooled nozzle of the hollow fibre inner diameter, so that the current speed corresponds approximately to the spinning speed (about 1 to 1.5 m/s).
Abstract:
A centrifuge apparatus and a method of using the apparatus to make hollow glass microspheres and hollow glass vacuum microspheres. The centrifuge has a plurality of coaxial blowing nozzles (55) disposed in the outer peripheral wall (20) of the rotor (1). Molten glass (4) is supplied to the centrifuge and by centrifugal force is caused to coat the inner wall surface (20) of the rotor (1) and be fed to the coaxial nozzles (55). A blowing gas or metal vapor blowing gas is supplied to the centrifuge and fed to the coaxial blowing nozzles (55). An entraining fluid (54) is also supplied to the centrifuge which flows through the centrifuge and is directed at the coaxial blowing nozzles (55). The hollow glass vacuum microspheres (67) are made by forming a liquid film of molten glass across the coaxial blowing nozzles (55), applying a metal vapor blowing gas (60) at a positive pressure on the inner surface of the glass film to blow the film which combines with the centrifugal force to form an elongated cylinder shaped liquid film (62) of molten glass which is detached by a jet (63) to form a hollow sphere (67).
Abstract:
A hollow high temperature ceramic superconducting fiber (10, 100), a process for making the hollow fibers and an apparatus for carrying out the process are provided. The apparatus functions to simultaneously draw a molten superconducting material (16) and a molten glass material (18) into a hollow preform (25) which is heat treated to form a hollow superconducting fiber (10, 100) which is flexible and has a high electrical current carrying capacity. The glass cladding layer (14, 14') surrounds the hollow superconducting core (12).
Abstract:
In a method for producing hollow mineral fibers (20) such as glass fibers, molten glass is supplied to a rotating glass spinner (10) having a peripheral wall (14). The spinner rotates so that molten glass is centrifuged through a first tube (24) extending through the peripheral wall of the spinner to form fibers. Gas is introduced into the interior of the molten glass to form hollow glass fibers. A second tube (44) positioned inside the first tube includes an inlet (56) in the wall of the first tube (24), and gas is introduced through the inlet from outside the peripheral wall. The hollow glass fibers are then collected to form a product such as a mat (130).
Abstract:
A fiber insulation product (30) comprising hollow fibers (76). Each hollow fiber (76) may be composed of at least two different thermoplastic insulating materials, such as glasses, having differing coefficients of thermal expansion, with each of th e hollow fibers (76) being an irregular-shape exhibiting a substantially uniform volume filling nature, and providing improved recovery and thermal conductivity abilities even in the absence of a binder material. An apparatus for making hollow fibers (76) for such a product is also provided.
Abstract:
Processes and systems for producing glass fibers having regions devoid of glass using submerged combustion melters, including feeding a vitrifiable feed material into a feed inlet of a melting zone of a melter vessel, and heating the vitrifiable material with at least one burner directing combustion products of an oxidant and a first fuel into the melting zone under a level of the molten material in the zone. One or more of the burners is configured to impart heat and turbulence to the molten material, producing a turbulent molten material comprising a plurality of bubbles suspended in the molten material, the bubbles comprising at least some of the combustion products, and optionally other gas species introduced by the burners. The molten material and bubbles are drawn through a bushing fluidly connected to a forehearth to produce a glass fiber comprising a plurality of interior regions substantially devoid of glass.
Abstract:
High index-contrast fiber waveguides, materials for forming high index-contrast fiber waveguides, and applications of high index-contrast fiber waveguides are disclosed.
Abstract:
A capillary member (11) comprising a disc-shaped plate unit (15) and a tubular edge glass unit (17), the plate unit (15) having a plurality of through holes (13) arranged regularly and two-dimensionally. This capillary member (11) is characterized in that a plurality of dual-tubes, each consisting of an inner tube of a first glass material formed with through holes and an outer tube of a second glass material, are bundled, and the outer tubes are fused to each other to be formed into a plate shape. The first glass material is larger in linear expansion coefficient than the second glass material, and is higher in softening temperature, yield temperature and glass transition temperature than the second glass material, thereby providing high strength and porosity.