摘要:
A method and system of forming a micro-wire including heating metal feedstock to a liquid state within a glass tube, wherein the metal feedstock includes an iron based glass forming alloy comprising one or more of nickel and cobalt present in the range of 7 atomic percent to 50 atomic percent and one or more of boron, carbon, silicon, phosphorous and nitrogen present in the range of 1 to 35 atomic percent. Negative pressure may be provided to the interior the glass tube and the glass tube containing the metal feedstock may be drawn down. The metal feedstock in the glass tube may be cooled at a rate sufficient to form a wire exhibiting crystalline microstructures present in the range of 2 to 90 percent by volume in a glass matrix.
摘要:
A resultant device and a method for making a frame structure for use as a poled optical device (10) includes providing a glass preform (30) having a poling area (12) and a waveguiding core area (16). At least one feedstock (24) is assembled into the waveguiding core area (16). The at least one feedstock (24) is separated from the poling area (12). The glass preform (30) and the at least one feedstock (24) are heated (36) and drawn into a smaller diameter (13) to form an optical waveguide.
摘要:
A fiber-based display includes orthogonal arrays of fiber with co-drawn wire electrodes placed between two plates to form an information display. One of the key concepts of the invention is that all structure of each row and column of a display panel is contained within each fiber of both arrays. Therefore, the entire functionality of the display is contained within each fiber of the display. Containing the structure of the display within the fibers not only eliminates multi-level alignment process steps, but allows for the fabrication of very large flat panel displays. The fiber arrays (17 or 27) are formed by drawing fiber from a preform onto a cylindrical drum (70) and then removing them from the drum as a sheet of fibers. The fiber arrays are assembled between the plates before a seal is applied. Tight control of the fiber shape and cross-section is obtained using a lost glass or polymer process. The cross-sectional shape of the fibers in the fiber arrays are suitable for use in a flat panel display, such as plasma emissive displays, plasma addressed liquid crystal displays, field emission displays, three-dimensional and multiple view displays.
摘要:
Procédé de réalisation d'une fibre optique selon lequel on prévoit les étapes suivantes: ― une étape de réalisation d'une préforme (1) possédant un axe de symétrie et leurs extrémités (11, 12) et comportant un coeur optique ainsi qu'au moins un évidement cylindrique (13, 14) dont l'axe est parallèle à l'axe de symétrie de la préforme; ― une étape d'étirage à une température permettant le ramollissement de la partie étirée de la préforme, de façon à obtenir une fibre optique creuse, caractérisé en ce qu'il comporte, après l'étape précédente de réalisation de la préforme: ― une étape de fixation de manière étanche, à une extrémité (11) de la.préforme (1), d'une enceinte creuse (2) dont la cavité (20) communique avec l'évidement de la préforme, ladite cavité (20) communique également avec un dispositif de régulation pneumatique; ― l'étape d'étirage comportant une régulation pneumatique du gaz contenu dans la cavité (20) et dans l'évidement à l'aide du dispositif de régulation pneumatique (3).
摘要:
A method of making ceramic superconducting wires comprising - a step of performing at least one process including mixing starting materials (such as oxides of the constituent metals or compounds containing the metals an oxidised state), shaping the mixed ceramic superconductor so obtained into a ceramic superconductor body of a predetermined shape, sintering it and subsequently grinding the sintered ceramic superconductor body; - a step of transferring the resulting ceramic superconductor powder (1) to a glass tube (2); - a step of heating the whole glass tube or a local portion of it in a heating and melting device (4) so as to melt the ceramic superconductor powder (1); - a step of spinning the glass tube so as to obtain a ceramic superconducting wire (8). A multiple conductor cable (12) can further be formed when a plurality of said ceramic superconducting wires (8) are bundled and put in a glass tube and subsequently heated and spun. Metal wires can further be bundled with said ceramic superconducting wires (8).
摘要:
A method of making ceramic superconducting wires comprising - a step of performing at least one process including mixing starting materials (such as oxides of the constituent metals or compounds containing the metals an oxidised state), shaping the mixed ceramic superconductor so obtained into a ceramic superconductor body of a predetermined shape, sintering it and subsequently grinding the sintered ceramic superconductor body; - a step of transferring the resulting ceramic superconductor powder (1) to a glass tube (2); - a step of heating the whole glass tube or a local portion of it in a heating and melting device (4) so as to melt the ceramic superconductor powder (1); - a step of spinning the glass tube so as to obtain a ceramic superconducting wire (8).
A multiple conductor cable (12) can further be formed when a plurality of said ceramic superconducting wires (8) are bundled and put in a glass tube and subsequently heated and spun. Metal wires can further be bundled with said ceramic superconducting wires (8).
摘要:
An electrooptic photonic crystal fiber having a central part forming a Bragg structure, the central part comprising a core (1) made homogeneously from low refractive glass and pre-designed set of altering claddings made of high refractive (2) and low refractive glasses (3); and a peripheral part forming an envelope of the Bragg structure, the peripheral part (5, 7) being formed from multicomponent glasses with low viscosity in the fiber drawing temperature range. Metallic electrodes (8) are embedded in the peripheral part adjacent to the central part on diametrically opposite sides. The method for manufacturing such a fiber includes drawing of separate rods from glass bars constituting fiber elements, drawing of electrodes in the form of metal filled glass capillaries, bundling a package with hexagonal section and internal Bragg structure from the rods, drawing a rod from the package, assembling a secondary package from the rods with Bragg structure, electrode capillaries and glass rods forming the envelope of Bragg structure, re-drawing the secondary package into a preform and then into photonic crystal electrooptic fiber.
摘要:
The invention discloses a static support bed (SSB) for purification, separation, detection, modification, and/or immobilization of target chemical entities or target biological entities present in a fluid. The static support bed of the present invention comprises one or more microwire supports suitable for the attachment of target chemical entities or target biological entities.
摘要:
A process and system for controllable production of continuous lengths of microwire having a core covered by a glass coating are provided. According to the method of the invention, a glass tubing is loaded with a core material. Thereafter, the process includes the step of heating the tubing containing the core material for melting thereof, softening a tip of the glass tubing and forming a drop of the core material in the molten state surrounded by an outer glass shell. During the process, the gas is evacuated from the glass tubing in order to control elevation of the drop. The method includes drawing the heated outer glass shell into a continuous microwire filament and stabilizing the temperature and mass of the drop during the process. Accordingly, the system includes a suitable glass feeder mechanism, a rod feeder mechanism, a furnace configured for forming a drop of the core material in the molten state surrounded by an outer glass shell, controllable vacuum and cooling devices and a receiver section for receiving the microwire obtained after the cooling. The system also includes a controller and sensing means configured for producing signals representative of the gas pressure in the tubing, temperature temperature of the drop, the speed of the microwire, the value of the microwire diameter, the value of the spool diameter and other relevant parameters.