37 results about "Fused quartz" patented technology

This invention relates to the field of inorganic non-metallic material purification technology, and particularly to a purification method for deep removal of difficult-to-remove impurities from quartz sand. The technical solution includes the following steps: quartz ore is electrically melted, cooled, and then crushed to obtain amorphous fused quartz sand; the amorphous fused quartz sand is magnetically separated, then calcined, and subsequently quenched in ultrapure water; the water-quenched quartz sand is pretreated with dilute hydrochloric acid solution, dried, and then pretreated to obtain pretreated quartz sand; the pretreated quartz sand is then heated and acid-leached with a mixed acid solution that does not contain hydrofluoric acid. This invention, under green conditions that completely eliminate hydrofluoric acid, utilizes the amorphous fused quartz method to eliminate the locking effect of the quartz lattice on impurities, achieving efficient and deep removal of difficult-to-remove impurities such as aluminum, lithium, titanium, calcium, and magnesium, stably obtaining ultra-high purity quartz materials with a purity of 5N or higher, and the process conditions are mild and compatible with existing industrial equipment.

This application discloses a high-transmittance ultraviolet fluorescence detection lens, relating to the field of optical lenses. It addresses the problems of insufficient transmittance, severe fluorescence signal attenuation, and poor image quality in existing ultraviolet fluorescence detection lenses. The lens is constructed by sequentially arranging an object surface protection window, a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, and an image plane along the optical axis from the object side to the image side. The object surface protection window is made of calcium fluoride, and at least a portion of the first to fifth lenses are made of calcium fluoride and at least a portion of fused silica. Each lens surface is coated with an ultraviolet antireflection film. By combining calcium fluoride and fused silica to optimize ultraviolet transmittance, and using a multi-layer ultraviolet antireflection film to reduce surface reflection loss, the lens achieves an overall transmittance of over 88% in the 250nm-380nm band. This effectively reduces fluorescence signal attenuation, significantly improves image brightness and contrast, and achieves good aberration correction. The compact structure makes it suitable for mass production applications.

An artificial stone and a method of making the artificial are disclosed. The artificial stone comprises: 6 to 16 wt.% acrylic thermoset resin; and 84 to 94% fused silica particles, wherein at least 40 wt.% of the fused silica particles are characterized by a particle size larger than 100 pm.

The application relates to the technical field of laser packages, in particular to an in-situ optical shaping VCSEL array integration method and an optical interconnection module, which comprises the following steps: S1, a quartz substrate is used, a femtosecond laser pulse is focused and scanned in the quartz substrate, and a three-dimensional profile of a micro hole is defined in advance; S2, a VCSEL chip is precisely placed into the micro hole in an array arrangement with the VCSEL chip facing upwards, and epoxy resin is cured by heating; S3, a metal layer is sputtered on the quartz substrate, and an electrical interconnection track is formed through photolithography; S4, a two-photon polymerization direct writing system is used to initiate two-photon polymerization of photoresist, solidification is realized, and the production of a polymer lens is completed. The application selects fused quartz glass as the only passive integrated substrate; the substrate has four characteristics of optical transparency, electrical insulation, thermal stability and three-dimensional micro machining at the same time, replaces the multilayer composite substrate in a traditional scheme at one time, and realizes the original integration design basis of an optical path, an electrical circuit and a thermal path.

The application designs a production method of isostatic pressing quartz ceramic roller, comprising the following steps: S1: preparing a glue solution; S2: preparing first and second fused quartz dry powder particles; preparing a first quartz ceramic roller blank by isostatic pressing of the first fused quartz dry powder particles with a first mold; preparing a second quartz ceramic roller blank by isostatic pressing of the second fused quartz dry powder particles and the first quartz ceramic roller blank with a second mold; and performing stage sintering treatment on the second quartz ceramic roller blank to obtain a quartz ceramic roller; the generated quartz ceramic roller has a small grinding amount, can reach the required size when shaping, has a high material yield, saves a large amount of cost of unqualified materials, and has a light ceramic roller body, small jumping, high coaxiality, good rotation effect, greatly reduced production cost, high green density and strength.

A variable temperature load (VTL) or noise source including a grounded coplanar waveguide (GCPW) comprising a first metallization patterned on a fused quartz substrate, the first metallization comprising a first end for connecting to a coaxial connector and a second end for connecting to a coplanar waveguide (CPW); the CPW coupled to a 50 ohm termination and comprising a second metallization patterned on a top surface of a crystal quartz substrate; a temperature sensing diode thermally coupled to the crystal quartz substrate and the second metallization; and a heater resistor coupled to the crystal quartz substrate via contact metallization.

This invention relates to the field of fused silica wire drawing apparatus, and more specifically, to a multi-parameter joint feedback control method and system for drawing silica wire. This invention can jointly control the drawing speed, feeding speed and laser power of silica wire based on the diameter of the silica wire and the temperature of the heating zone, thereby achieving uniform stress distribution and diameter of the silica wire, effectively ensuring the repeatability of various parameters of the drawn silica wire, and further improving the fracture strength, quality factor and torsion balance system sensitivity of the silica wire.

This utility model relates to the field of fused silica production technology, specifically disclosing a screening device for fused silica production, including a screening box. The screening box has a multi-stage screening mechanism inside, and a dust removal mechanism is provided on the upper surface of the screening box. A fan can extract the dust generated during the screening process, and then the dust is transported to a bag filter for dust removal through a conveying pipe to prevent dust from affecting the surrounding environment. Pulling a moving rod moves multiple inclined grooves. The inclined grooves, together with trapezoidal sliders and trapezoidal sliding grooves, move multiple abutment rods upward in the through holes, thereby releasing the abutment rods from the screen. Then, the screen is pulled out from between the mounting frame and the L-shaped plate, and removed from the screening box through a notch, thus disassembling the screen. During installation, the above steps are reversed, which facilitates quick and easy screen replacement, shortens replacement time, and avoids affecting the screening efficiency of fused silica raw materials.

The invention belongs to the technical field of domestic ceramics, and discloses an open fire ignition and quenching resistant domestic ceramic and a preparation method thereof. The domestic ceramic resistant to open fire firing and quenching is prepared from kaolin, bentonite, clay, electroquartz, aluminum oxide, nano zirconium silicate, sodium silicate, a sodium hydroxide solution, sodium humate, ammonium chloride, spodumene, lithium carbonate and deionized water, dry powder and slurry are evenly mixed and stirred, then mechanical pressing is conducted, and a complete ceramic body is obtained; according to the preparation method disclosed by the invention, the raw material ratio and the sintering process are optimized, open fire firing resistance and quenching resistance are synergistically improved, thermal shock resistance is enhanced by controlling the crystallinity of the raw materials, and meanwhile, a composite additive is introduced to improve a high-temperature phase change behavior; and the cost is effectively reduced and the process steps are simplified while large-scale production is realized.

This application relates to an intracavity frequency-doubled yellow laser device. An intracavity frequency-doubled laser device includes: a first and second mirror defining a resonant cavity; a gain medium for generating a first laser beam in response to an external pump beam received from outside the cavity; a nonlinear frequency-doubled optical element for generating a second laser beam in response to the first laser beam; a birefringent waveplate for controlling the phase properties of the first and second laser beams; and a fused silica element located at the exit of the resonant cavity. The second mirror is formed as a relatively thick film on the fused silica and is controlled to generate the output beam of the second laser beam with high precision. The four components within the resonant cavity are positioned back-to-back and fixed in place using optical adhesive (forming a compact, miniaturized laser device).

An intracavity frequency-doubling laser device includes a first mirror and a second mirror defining a resonance cavity, a gain media to produce a first lasing light in response to an external pump beam received from outside the cavity, a nonlinear frequency-doubling optical element to generate a second lasing light in response to the first lasing light, a birefringent waveplate to control phase properties of the first and second lasing lights, and a fused quartz element positioned at the exit of the resonance cavity. The second mirror is formed as a relatively thick film on the fused quartz and is controlled to create an output beam of the second lasing light with great accuracy. The four components within the resonance cavity are positioned back-to-back and held in place using an optical glue (forming a compact, miniaturized laser device).

The present application relates to a full fused quartz planar micro electro mechanical system gyro structure and a preparation method, and belongs to the technical field of micro electro mechanical systems. The structure comprises a resonance structure layer and a substrate layer. The resonance structure layer comprises a drive frame, the drive frame is elastically connected with detection mass blocks, and the detection mass blocks are connected through detection displacement amplification mechanisms. Drive comb electrodes are arranged on the drive frame, and detection comb electrodes are arranged between the detection mass blocks. The drive comb electrodes, the detection comb electrodes and the anchor points of the resonance structure layer are integrally formed and are jointly fixed on anchor point bosses of the substrate layer. The present application can improve bonding reliability, optimize chip area utilization and enhance electrode layout flexibility.

The application relates to the field of investment casting technology, in particular to a silica sol shell and a preparation method thereof. The preparation method comprises the following steps: dipping a mold group into a surface layer coating to perform surface layer coating, and then sprinkling surface layer sand after coating; the surface layer coating comprises surface layer powder, zircon sand and surface layer silica sol; the surface layer powder comprises zirconium powder and fused quartz powder with a mass ratio of 1:0.42-2.34; the mass ratio of the zirconium powder and the zircon sand is 1:0.1-0.2; and the mass ratio of the surface layer powder and the surface layer silica sol is 2.78-3.5:1; dipping the surface layer of the shell into a back layer coating to perform back layer coating, and then sprinkling back layer sand on the surface of the back layer coating after coating; the back layer coating comprises back layer powder and back layer silica sol; the back layer powder comprises kaolin powder and quartz powder with a mass ratio of 1:1.5-1.7; and the mass ratio of the back layer powder and the back layer silica sol is 1:0.9-1.1; and the cost is remarkably reduced when the silica sol shell is prepared by the method.

This invention relates to a method for fabricating a low-temperature sintered fused silica hemispherical resonator, belonging to the field of inertial navigation technology. The method comprises four steps: preparation of glass slurry, photopolymerization molding, thermal debinding, and vacuum sintering. This method employs ultraviolet photopolymerization integral molding technology, effectively ensuring the precision and surface quality of the inner and outer walls of the resonator. Compared to traditional processing techniques, this method can sinter fused silica resonators at 650 °C with a surface roughness below 10 nm, offering advantages such as a simple process flow, low sintering temperature, high molding precision, and low manufacturing cost. This invention eliminates the need for high-temperature molding, reducing the heat load and process difficulty. By designing replaceable high-precision molds, this method possesses high flexibility and structural customization capabilities, making it suitable for manufacturing various complex fused silica microdevices, exhibiting good process compatibility and significant application value.

This invention discloses a method for preparing a highly compatible anti-bubble and anti-crystallization functional layer for the inner layer of a quartz crucible, relating to the field of quartz crucible preparation technology. It aims to solve the problem that existing solutions cannot simultaneously address anti-bubble, anti-crystallization, compatibility, and industrialization requirements. The method includes: preparing an inhibitory layer suspension, the components of which, by mass percentage, are 92-97% fused quartz micropowder, 0.5-2% neodymium oxide micropowder, 2.1-5.5% KH550, and the balance deionized water, mixing to obtain a suspension with a viscosity of 60-90 mPa·s; applying the suspension to the inner surface of a quartz sand blank using a dual-co-directional rotary spraying process, followed by gradient heating at 40-50℃ to solidify and form a 50-100 μm thick functional layer; and then arc melting and cooling the blank to obtain the quartz crucible. This invention achieves dual functions of anti-bubble and anti-crystallization, exhibits strong compatibility with the substrate without damage, is compatible with existing production lines, has low energy consumption and cost, can significantly extend the service life of the crucible, improves the quality of monocrystalline silicon, and is suitable for industrial mass production.

The present application relates to the technical field of waste recycling, and particularly relates to a refined tin preparation process for grading smelting and deep purification of tin-containing secondary materials. The process mixes tin-containing dust with graphite powder, light soda ash and fused quartz sand to form balls, sprays a modified dendritic polyamide-amine shell coating liquid on the outer surface of the ball core, then sprays calcium acetate solution, nano calcium hydroxide ethanol dispersion liquid and ammonium bicarbonate cold solution in sequence, and obtains refined tin products through low-temperature solid shell, medium-temperature dechlorination, high-temperature reduction smelting and vacuum distillation purification. The present application can improve the thermal stability of the pellets, reduce the circulation of chlorine-containing components and tin volatilization loss in the smelting process, and reduce the lead content in refined tin, and is suitable for resource treatment of chlorine-containing, lead-containing and tin-containing dust.

The application relates to the technical field of repairing materials, and discloses a superfine powder high-temperature-resistant material for hot repairing of a glass kiln and a preparation method. The superfine powder high-temperature-resistant material comprises the following raw materials in parts by weight: 45-58 parts of silica brick powder, 24-36 parts of fused quartz powder, 8-15 parts by weight of a binding agent, 2-5 parts of phosphoric acid chitosan-coated nano silicon dioxide and the like. The phosphoric acid chitosan-coated nano silicon dioxide introduces a large amount of phosphoric acid groups, can play a binding agent role, forms a chemical force with the surfaces of the silica brick powder, the fused quartz powder and clay, is combined more densely, is uniformly filled in the gaps between the silica brick powder and the fused quartz powder, improves the compactness of the repairing material slurry, has larger mechanical strength after sintering, better high-temperature resistance, higher high-temperature compression strength and refractoriness, and lower permanent change of a heating wire, and is more excellent in high-temperature size stability.

A laser-sustained broadband light source is disclosed. The light source may include a gas containment structure, a pump laser source, and a light collector element. The gas containment structure may include a body formed from an optically transparent material, such as fused silica, and one or more windows transmissive to vacuum ultraviolet (VUV) light. The one or more windows may be bonded to one or more extension portions, thereby ensuring a sealed internal gas volume and avoiding exposure of metal components to destructive VUV radiation. The pump laser source may be configured to direct the pump beam into the gas containment structure to sustain a plasma, emitting broadband light through the one or more windows. Optional retroreflectors may be included to enhance light collection efficiency. The light source configuration extends the spectral range into the VUV and / or infrared regions, improves manufacturability, and enhances plasma stability.

This invention discloses an in-situ plasma cleaning method for large-aperture fused silica elements based on frequency conversion coordinated control, comprising: low-frequency high-energy physical unlocking and subsurface modification; frequency conversion transition and atmosphere gradient replacement; high-frequency low-pressure deep oxidation decomposition; and surface passivation and charge neutralization. This invention effectively solves the inherent contradiction in traditional cleaning methods of balancing "deep removal" and "surface protection"; it also enables in-situ treatment across the entire aperture, significantly improving device operating efficiency, substantially increasing the laser damage threshold and element lifespan, effectively suppressing secondary pollution, and possessing process safety and environmental friendliness.

The utility model provides a kind of high-precision quartz tube processing's melting device, it is related to quartz tube processing field, the utility model includes heat preservation box, for melting quartz sand's melting component;For crushing quartz sand's crushing component;And install between the anti-blocking component of the crushing component and melting component;The melting component includes: rotation is installed in the graphite crucible of the heat preservation box inside;And rotation is installed in the sealing bushing of the graphite crucible top;The anti-blocking component includes: vibration disc that elastically connects in the graphite crucible inside;Multiple high-temperature resistant springs are fixed in the vibration disc top.The utility model can rely on free falling quartz sand to drive vibration disc to vibrate by the anti-blocking component set between crushing component and melting component, drive inserting rod to move inside feeding port when vibration disc vibrates, quartz sand jammed in feeding port can be shaken and quickly fall down, to avoid feeding port blockage influence quartz sand normal feeding.

A vacuum insulating panel may include: a first glass substrate; a second glass substrate; a plurality of spacers provided in a gap between at least the first and second substrates, wherein the gap is at a pressure less than atmospheric pressure; and a seal having at least a first seal layer provided between at least the first and second substrates. Amorphous or substantially amorphous silica (e.g., fused silica) may be used in the seal layer, and in the composite material for forming same. In order to form a layer of the seal for the edge seal and / or tube seal, a glass composition may be provided such as in a paste which may also include filler (which may include the amorphous silica), binder and / or solvent. The glass composition (e.g., the glass, such as glass powder, present in a paste before firing) for use in forming the seal layer may include one or more of tellurium oxide, bismuth oxide, and / or vanadium oxide, and may be designed to increase the density of the seal layer.

The utility model proposes a kind of high-temperature melting equipment for large-diameter quartz tube preparation, it is related to quartz tube processing field, the utility model discloses a support assembly for placing quartz tube, preheating component for preheating quartz tube;And melting component for melting quartz tube;The support assembly includes: support base;And fixed in the top of support base two groups of quartz tube placement base;The preheating component includes: fixed between two groups of the bottom heating ring of quartz tube placement base.The utility model can adjust the height of top heating ring according to the diameter of quartz tube by the preheating component setting, and the quartz tube is preheated by the heating pipe inside bottom heating ring and top heating ring, avoid directly using oxyhydrogen flame gun to heat the quartz tube with lower temperature, quartz tube surface temperature distribution is uniform after preheating, reduce the local temperature difference between oxyhydrogen flame gun and quartz tube wall, improve security.

The present application relates to the technical field of gyroscopes, and specifically to a high-precision resonator gyroscope and a manufacturing process thereof. The manufacturing process includes obtaining a resonator substrate from fused quartz material, and further includes the steps of model design, mass trimming, assembly and packaging, and testing and compensation. A shaft system dynamic balancing and polishing process is introduced into the manufacturing process, a windowing structure is arranged on the resonator substrate, and a balancing module is configured to release balancing flow to an inner surface of the resonator substrate, so that the dynamic balance is achieved, the polishing operation on the inner surface is completed through the polishing flow, and the effects of the trimming operation is more precisely predicted and evaluated. This method not only enhances trimming accuracy, but also reduces potential performance losses caused by over-trimming or under-trimming.

The present application relates to the field of optical technology, and discloses a kind of ultraviolet achromatic high-transparency telecentric flat-field focusing optical system, to be used in ultraviolet femtosecond laser processing with scanning vibration and improve processing quality.The present application includes first lens, second lens, third lens, fourth lens, fifth lens and window piece arranged in turn along the direction of light incidence, and the window piece is the protection flat plate without optical power;The first lens is meniscus lens with positive optical power;The second lens is meniscus lens with negative optical power;The third lens is meniscus lens with positive optical power;The fourth lens is meniscus lens with positive optical power;The fifth lens is double convex lens with positive optical power;And: the material used for the first lens is ultraviolet fused quartz or calcium fluoride, the material used for the second lens is i-line glass, the material used for the third lens is calcium fluoride, the material used for the fourth lens is calcium fluoride, and the material used for the fifth lens is ultraviolet fused quartz or calcium fluoride.

This invention discloses an experimental apparatus and method for visualizing the permeability of grouting slurry in pipe jacking in water-rich pebble formations. The apparatus includes a model box filled with transparent soil, which is composed of transparent fused silica particles and a calcium bromide solution with a refractive index matching that of the fused silica. A circular pipe is nested within the transparent soil. A jacking module is installed at the left end of the circular pipe, and a grouting module is located on the right side of the model box. A pressure plate and weights are installed on top of the transparent soil to adjust the vertical pressure. A first laser slicing observation module and a right-side laser slicing observation module are respectively located in front of and on the right side of the model box. A front-side industrial camera and a right-side industrial camera are also located in front of and on the right side of the model box, respectively. Grouting holes are provided on the wall of the circular pipe. The grouting pipe of the grouting module extends into the inner wall of the circular pipe and connects to the grouting holes through a grouting branch pipe. This invention provides a scientific, intuitive, and reliable experimental basis and methodological support for circular pipe jacking engineering in water-rich pebble formations.

The application discloses a preparation method of a quartz ceramic roller by extrusion molding, and comprises the following steps: preparing a first fused quartz material and a second fused quartz material; preparing a first mud material by the first fused quartz material and a second mud material by the second fused quartz material; simultaneously preparing a quartz ceramic roller blank by the first mud material and the second mud material through an extrusion integrated molding device; the quartz ceramic roller blank comprises a center layer blank and an outer layer blank which is sleeved outside the center layer blank; dynamically placing the quartz ceramic roller blank at room temperature to obtain a pre-sintered quartz ceramic roller blank; gradient sintering the pre-sintered quartz ceramic roller blank to obtain a quartz ceramic roller main body; installing two steel shaft sleeves at two ends of the quartz ceramic roller main body to obtain the quartz ceramic roller; and the prepared fused quartz ceramic roller is smooth in surface, high in overall strength and light in quality.

This invention discloses a frequency-matched micro-hemispherical resonator and its manufacturing method. The frequency-matched micro-hemispherical resonator includes a micro-shell structure and a stiffness amplification structure. The micro-shell structure includes a shell and a hollow support column disposed within the shell. The bottom of the hollow support column is flat. The stiffness amplification structure is disposed on the outside of the shell. The stiffness amplification structure is used to increase the equivalent mass and equivalent stiffness of the micro-shell structure in any direction. The micro-shell structure and the stiffness amplification structure are integrally fabricated using fused silica material. This invention adds a stiffness amplification structure to the micro-shell structure, which can simultaneously increase the equivalent mass and equivalent stiffness on the mode axis in any direction. Therefore, even if there are manufacturing errors in the micro-shell structure, the stiffness amplification structure can still adjust the natural frequency to achieve frequency matching.

The application discloses a fused quartz substrate integrated laser radar transceiving optical module and an adjusting method, and belongs to the technical field of optical instruments. The module integrates all optical elements of the transmitting and receiving optical paths on the same fused quartz substrate, and configures a micro sensor and a micro adjusting device for each element. The system comprises a first control loop, a second control loop, a first central signal gating and routing unit, comparison judgment and arbitration logic. Through six pre-defined segment diagnosis modes, the system can accurately locate the misalignment segment in the optical path, and only drive the corresponding micro adjusting device to perform cooperative closed-loop compensation, realizing adaptive alignment from local fine tuning to global search. The system has the beneficial effects of self-maintenance in the whole life cycle, high efficiency and accuracy of adjustment, global optimization of the transceiving link, and significant reduction of the whole life cycle cost, and is particularly suitable for fields such as vehicle-mounted laser radars with high reliability requirements.

The application discloses a preparation method of a streptavidin quartz capillary and application thereof. The method uses a fused quartz capillary as a carrier, and after the capillary is cleaned, activated and pretreated, streptavidin is modified on the inner wall of the capillary through a chemical covalent bonding method, and can be applied to enrichment of ultramicro biotinylated samples. The application has the following advantages: (1) the preparation method is good in universality, and is mild in operation condition, and quartz capillaries with different performances and inner diameters can be modified by the method; (2) the streptavidin quartz capillary obtained by the method is good in enrichment performance of biotinylated samples, and the required sample amount is extremely low.

The application discloses a kind of glaze slip for vacuum arc-extinguishing chamber porcelain shell and preparation method thereof, it is related to fine ceramic material technical field.The glaze slip includes dry base powder 100 parts, deionized water 50~70 parts, anhydrous ethanol 0.2~0.6 parts and auxiliary agent 0.2~0.6 parts by mass fraction;Wherein dry base powder includes basic powder and fumed silica, and the mass of fumed silica is 2%~6% of the total mass of dry base powder;Basic powder includes potassium feldspar 84~87 parts, alumina 4~6 parts, zirconia 2~3 parts and fused quartz powder 2~5 parts by mass fraction.The preparation method includes mixing deionized water and anhydrous ethanol to obtain mixed solvent;Add basic powder and auxiliary agent to obtain basic slurry by ball milling;Add fumed silica to obtain glaze slip by dispersion treatment.The glaze slip prepared by specific component ratio and preparation process has excellent stability and fluidity, and the glaze surface is smooth after glazing.