Translation of "Silica fiber" in German

Core materials used are, in particular, compressed powder sheets of fumed silica and glass fiber sheets.

The outer protective cladding around the silica glass fiber can be applied subsequently.

Mixtures of fillers are, for example: silica fillers of various origins, silica/kaolin or silica/glass fibers/asbestos as well as blends of silicate containing reinforcing fillers with the well-known rubber blacks such as, e.g., silica/HAF black or silica/glass fiber cord/ISAF black.

As mixtures of fillers, there can be mentioned silica/kaolin or silica/glass fibers/asbestos as well as blends of the silicate reinforcing fillers with the known rubber carbon blacks, e.g., silica/ISAF-black or silica/glass fiber cord/HAF black.

In the simplest case, this fiber can be coated during the drawing process with a transparent plastic cladding whose refractive index is lower than that of the glass material, so that an optical waveguide is produced in the form of a plastic-clad silica (PCS) fiber.

Alternatively, in a so-called “side-fiber” application system, a silica fiber can be used, where the output of the laser radiation is not via the fiber end face but via a small area of the cladding surface.

In order to produce side-emitting properties based on scattering centers in the interface between core and cladding, it is proposed in accordance with patent specification LV 11644 B for silica glass fibers to apply to the drawn out silica glass fiber a coating that contains scattering particles.

Silica fiber SiO2?99.9%

Several of the all-natural ingredients will definitely include Povidone, silica, Neopuntia fiber complex and numerous other all-natural elements.

The reinforcing fillers include silica and short fibers such as, for example, KEVLAR-short Fiber®.

Chopped Strands is Chopped from E glass or AR glass or high silica glass fibers.

Thermally insulating mixtures containing silica, opacifiers and fibers are known.

Preferred bioabsorbable carrier materials are those that are based on silica gel fibers and/or silica gel webs.

Silica gel carrier materials can comprise silica gel fibers, webs, monoliths, hydrogels and/or powders.

In addition to standard inhibitors, such as p-benzoquinone, hydroquinone, 3-methyl pyrocatechol or metal compounds in the usual quantities, the polyester resins according to the invention may contain as further additives (d) small quantities of standard carriers and fillers as well as thixotropic agents, such as glass fibers, synthetic fibers, silica and talcum.

For this purpose, substances such as pyrogenic silica, asbestos fibers, quartz meal, microdolomite or liquid components such as castor oil derivatives, acrylic resins or silicone are used.

The silica fibers are thereupon treated with an agent that accelerates the formation of cristobalite from amorphous silica.

After washing, the silica fibers were dispersed while still wet in an aqueous solution containing 2.7% NaH2 PO4 by weight, whose pH had been raised to 6.1 by addition of 10% NaOH, and were then precipitated onto a screen as a mat-like object.

Fillers of any kind (for example, silica, chalk, glass fibers, and glass powder) may, of course, be added to the powders or even to the powder melts.

Depending on the intended use, it is possible to add fillers, such as talcum, gypsum or silica, fibers, organic additives such as thixotroping agents, flow control agents, binders, lubricants, matting agents, plasticizers, wetting agents, silicones for improving the constitution of the surface, antiflotation agents or minor amounts of solvents.

Examples of suitable fillers are talc, mica, kaolin, chalk, quartz powder, asbestos powder, slate powder, barium sulfate, various silicas, silicates, glass fibers, organic fibers and the like.

The present invention relates to high temperature-resistant fibrous silicon dioxide materials, such as staple fibers, fiber mats, plates and other objects, containing silicon dioxide fibers with very high silicon dioxide content, presenting excellent characteristics at high temperatures, particularly at temperatures of up to 1500° C. and above, produced by the method comprising dry-spinning water glass into water glass fibers and converting the water glass fibers into silica fibers followed by dehydration.

Such fibrous material can be produced by a method in which water glass, essentially free of non-alkali metal compounds and having a molar ratio Na2 O:SiO2 of approximately 1:3 to 1:1.9, is spun to water glass fibers by the dry-spinning process, the water glass fibers are treated with aqueous acid or salt solutions containing hydrogen ions to convert the sodium silicate into silica, the silica fibers thus obtained are washed and treated with an agent that accelerates formation of cristobalite from amorphous silica, and the fibers are dehydrated at temperatures above 600° C. The fibers may, if desired, be shaped, preferably into mats or plates, and dried before dehydration.

It is preferred that, after washing, the silica fibers are treated while still wet with the agent that accelerates cristobalite formation.

In a preferred embodiment of the invention, silica fibers milled and dehydrated to staple lengths of 80-2000 ?m are dispersed in an aqueous solution of the agent, shaped (e.g. into a plate by filtration), and dried before triggering crystallization to cristobalite.

Water glass fibers are produced from such water glass solutions by the dry-spinning method and are then converted into silica fibers by treatment with aqueous acid or salt solutions containing hydrogen ions.