32results about How to "Improve Optical Uniformity" patented technology

The invention discloses a groove sinking method and device for large-size synthetic quartz glass. The groove sinking method comprises the following steps: providing a synthetic quartz glass lump; placing a groove sinking mold on an objective table of a groove sinking furnace, and placing the quartz glass weight in the groove sinking mold; closing the tank sinking furnace, vacuumizing, raising the temperature to the tank sinking temperature, introducing protective gas, and starting a rotary driving mechanism of the objective table to carry out tank sinking modification; and after groove sinking is finished, three-stage precision annealing treatment is carried out in a groove sinking furnace. In the groove sinking modification process, the objective table is driven to rotate through the rotary driving mechanism, the groove sinking mold is driven to rotate, and the problems that in the large-size synthetic quartz glass groove sinking process, forming is difficult, and bubbles, stripes and other defects are prone to occurring are solved; and three-stage annealing treatment is performed in the groove sinking furnace, and the groove sinking mold is kept rotating in the annealing process, so that the problems of high energy consumption, low production efficiency, poor temperature uniformity and poor annealing effect caused by single annealing in the annealing furnace are avoided.

The invention provides a deposition apparatus, a deposition method, and quartz glass. The deposition device comprises a furnace body, a deposition assembly, a supporting assembly, a main blow lamp and a plurality of sets of auxiliary blow lamps. The furnace body is provided with an air inlet channel and an air exhaust channel. The supporting assembly is provided with a defined rotating axis, and the supporting assembly can rotate around the rotating axis. The main blowtorch has a first jetting direction which is parallel to the direction of the rotating axis. The auxiliary blowtorch has a second jetting direction, and an included angle theta is formed between the second jetting direction and the first jetting direction and is larger than or equal to 10 degrees and smaller than or equal to 15 degrees. The deposition method comprises the following steps: preheating a furnace body to a first temperature; and opening an air inlet channel and an air exhaust channel of the furnace body. The supporting assembly is controlled to rotate. And when the temperature in the furnace body is increased to a second temperature, conveying raw material gas carrying the silicon-containing compound and the first mixed gas into the furnace body. And the supporting assembly is controlled to move towards the side away from the main blowtorch. The quartz glass is formed by processing a product deposited by the deposition method.

The invention provides anti-scattering water-guided laser cutting fluid as well as a preparation method and application thereof. The anti-scattering water-guided laser cutting fluid comprises the following components in parts by weight: 0.1-1 part of an anti-scattering agent; 0.01 to 0.1 part of a foam discharging agent; 1-5 parts of a refractive index regulator; and 80-99 parts of ultrapure water. The anti-scattering agent is a polymer; the foam removing agent is one or more of hydroxymethyl cellulose, hydroxy propyl cellulose, sodium lignin sulfonate, potassium lignin sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt; the refractive index regulator is an iodine-containing compound and / or a fluorine-containing compound. According to the anti-scattering water-guided laser cutting fluid, light beam scattering and energy loss in the water-guided laser cutting process can be remarkably reduced, and the cutting precision and efficiency are improved. The anti-scattering water-guided laser cutting fluid has very good application prospects and large-scale industrial popularization potential in the field of water-guided laser cutting.

The invention provides a CD-ROM integrated packaging device, a lamp panel and a display device.The packaging device comprises a packaging substrate, a light-emitting element and a driving element, the packaging substrate is provided with a first surface and a second surface which are opposite, and the light-emitting element is electrically connected with the packaging substrate; the driving element is electrically connected with the packaging substrate; wherein the light-emitting element and the driving element are arranged on the side, deviating from the first surface, of the second surface, the orthographic projection of the driving element on the second surface and the orthographic projection of the light-emitting element on the second surface are not overlapped, and the distance between the surface, deviating from the packaging substrate, of the light-emitting element and the first surface is smaller than the distance between the driving element and the first surface. According to the packaging substrate and the display device, under the condition that the production and manufacturing cost is considered, the yield can be improved, the influence of the driving element on side face light emitting of the light-emitting chip is reduced, the optical uniformity of the lamp panel is improved, and the display quality is improved.

The utility model provides a transparent conductive film for improving transmission color. The transparent conductive film is provided with a flexible base material layer, a barrier layer, a shadow eliminating layer, a color layer and a conductive layer which are sequentially arranged from the bottom surface to the surface. The transparent conductive film for improving transmission color provided by the utility model has the characteristics of good color, good stability, no etching mark, good flexibility, good conductivity and the like, is an excellent transparent conductive film, and is suitable for being popularized in the industry.

The invention discloses a preparation process of phosphate glass with low hydroxyl content and high uniformity. A secondary melting process is mainly adopted, uniform and bubble-free phosphate glass is obtained through high-temperature melting, glass dewatering is performed through secondary in-tube atmosphere low-temperature melting, and free forming of the glass in a furnace is performed by adopting a crucible which is not mutually wetted with the glass to reduce glass pouring stripes. In the process, the volatilization of the components is reduced by using a lower secondary melting temperature, the water removal of the glass is performed by introducing gas, and meanwhile, the glass is freely formed in the crucible by adopting the crucible which is not moistened with the molten glass, so that the pouring stripes of the glass are reduced, and the optical uniformity of the glass is improved.

The invention relates to a nonlinear optical crystal of guanidinium tetrafluoroborate and a preparation method and use thereof. The crystal has a chemical formula of [C(NH2)3]BF4 and a molecular weight of 146.89. It belongs to the trigonal crystal system; its space group is R3m; its lattice parameters are a=7.4634(10)A, b=7.4634(10)Å, c=9.1216(19) (6)Å, and Z=3; its ultraviolet cutoff edge is 200 nm; and its frequency-multiplication response is 4-5 times of that of the commercialized nonlinear optical crystal KDP. In the invention, a hydrothermal method, a roomtemperature solution method, an evaporation method or a solvothermal method is used to grow the crystal in a centimeter-scaled size. The invention relates to use of the crystal in the preparation of producing frequency-doubling, frequency-tripling, frequency-quadrupling, frequency-quintupling or frequency-sextupling harmonic light output from the fundamental frequency light of 1064 nm generated by a Nd: YAG laser; or producing a ultraviolet and deep-ultraviolet frequency-multiplication light output below 200 nm; or in the manufacture of a frequency-multiplication generator, a frequency up or down converter or an optical parametric oscillator.

The utility model relates to a multi-layer burner for synthesizing quartz glass, and belongs to the technical field of production appliances for synthesizing quartz glass. A material oxygen preservation cavity, a hydrogen cavity A, an oxygen chamber A, a hydrogen cavity B and an oxygen chamber B are sequentially arranged on the periphery of the central pipe from top to bottom; a hydrogen chamber C, an oxygen chamber C, a hydrogen chamber D, a material oxygen-preserving chamber, a hydrogen chamber A, an oxygen chamber A, a hydrogen chamber B and an oxygen chamber B; the hydrogen cavity C, the oxygen chamber C and the hydrogen cavity D are respectively provided with a communicating pipe, one end of each communicating pipe is communicated with the corresponding gas cavity or gas chamber, and the other end of each communicating pipe is communicated with a hydrogen source or an oxygen source. The quartz glass burner is simple in structure and good in practicability, solves the problems that in the working process of an existing burner, distribution of a deposition temperature field is not uniform, and the temperature gradient is large, effectively improves optical uniformity of quartz glass, and has positive popularization significance for manufacturing enterprises.

The present invention provides an optical article, which comprises, in order: a substrate, a primer layer formed by curing a polymerizable composition for primer layer formation, and a photochromic layer containing a photochromic compound, wherein the polymerizable composition for primer layer formation comprises: component A: polyisocyanate, component B: a hydroxyl-containing polymerizable compound, and component C: a polymerizable compound selected from (meth)acrylates and vinyl ethers, and the viscosity of the polymerizable composition is 100 cP or less.

The utility model discloses a light-emitting diode (LED) point light source shell capable of expanding irradiation range, which comprises a bottom cover, a shell body and a lampshade, the bottom cover is covered on the lower end portion of the shell body, the lampshade is detachably covered on the upper end portion of a containing groove, a round convex lens is arranged on the upper end portion of the lampshade in a protruding mode, and a plurality of prism refraction units are arranged on the inner circumferential wall of the round convex lens in a protruding mode. The left side wall and the right side wall of the lampshade are each provided with a first limiting groove in a concave mode, the lower end of each first limiting groove is provided with a first elastic buckle arm in a protruding mode, the upper end walls of the two sides of the shell are each provided with a through groove in a concave mode, the inner side walls of the through grooves are each provided with a first buckle protrusion in a protruding mode, and the first elastic arms are detachably embedded in the through grooves respectively. The first limiting plates are detachably embedded in the first limiting grooves respectively, and the first elastic buckle arms are detachably and fixedly connected with the first buckle protrusions respectively. According to the technical scheme, light rays can be irradiated in a scattered mode, the light ray irradiation range is enlarged, and the LED lamp is convenient and fast to mount and dismount and high in practicability.

The application discloses a kind of multispectral nanocluster doped multiple coating light concentrator and its method, including preparation substrate layer, preparation light emitting layer and preparation anti-reflection function layer, multispectral nanocluster doped light emitting layer is coated on substrate layer, anti-reflection function layer is coated on light emitting layer, the multispectral nanocluster is using Eu 3+ 、Tb 3+ 、Ce 3+ Ion or any combination thereof induced nanocluster of agglomerated polymer formation, the light emitting layer is obtained using multispectral nanocluster doped resin, for the absorption of incident short-wave light and conversion into characteristic emission light;The anti-reflection function layer is coupled to the outermost layer of light emitting coating, for limiting the light quantum conduction in coating, using different refractive index coating to limit the light quantum conduction in coating, to lock the fluorescent light quantum escape emitted by inner layer light emitting material, while, also can play the role of reducing interface reflection loss and improving the injection efficiency of incident light to light emitting layer.

The present application relates to the technical field of optical glass manufacturing, and discloses an optical glass mold pressing forming method based on multi-zone non-isothermal gradient heating. The method divides the heating system of the mold pressing forming area into multiple independent temperature control zones, actively constructs a preset non-isothermal gradient temperature field that is geometrically suitable for the component before pressure forming, and guides the viscosity distribution of the glass material. In the pressure forming process, the temperature data of each temperature zone are collected in real time and compared with the dynamic target gradient, the heating power is adjusted based on the deviation closed loop, the actual temperature field intelligently follows the preset gradient, and the material flow filling is optimized. After forming, a gradient annealing cooling program with partition differentiation is executed, different cooling rates are set according to the thickness or stress risk of the region, and the internal stress is sequentially released. The present application actively and accurately regulates and controls the temperature field in the whole forming process, can effectively improve the surface shape precision of the optical component, reduce the residual stress and improve the surface quality.

The invention relates to the technical field of preparation of infrared optical materials, and particularly discloses a large-diameter infrared silicon single crystal as well as an annealing method and application thereof. The annealing method of the large-diameter infrared silicon single crystal is provided by controlling parameters such as temperature, heating rate and cooling rate of different annealing stages under the protective gas atmosphere, and the annealing method can be used for uniformly heating a silicon single crystal rod without increasing the concentration of oxygen donors, so that the quality of the large-diameter infrared silicon single crystal is improved. And the internal stress and lattice defects of the silicon single crystal rod can be effectively reduced. The prepared infrared silicon single crystal has excellent optical transmittance and optical uniformity, the average infrared transmittance within the range of 2-6 microns is larger than or equal to 52.4%, and the optical uniformity is smaller than or equal to 7.5 * 10 <-5 >. The large-diameter infrared silicon single crystal prepared by the method can be applied to preparation of a large-diameter infrared remote sensing detection lens or an infrared optical window and related fields of the large-diameter infrared remote sensing detection lens or the infrared optical window.

The invention relates to a rare earth doped alkaline earth fluoride / alkaline earth fluoride bonded crystal and a preparation method thereof. The preparation method of the rare earth doped alkaline earth fluoride / alkaline earth fluoride bonding crystal comprises the following steps: (1) polishing and cleaning a bonding surface to prepare a pre-bonding piece of a rare earth doped alkaline earth fluoride RE: MF2 crystal and an alkaline earth fluoride MF2 crystal; (2) placing the pre-bonding piece of the RE: MF2 crystal and the pre-bonding piece of the MF2 crystal on an optical cement leaning body in the direction that the bonding surfaces are oppositely attached to each other, heating, and applying pressure to enable the bonding surfaces of the two crystals to tightly abut against each other to obtain a crystal optical cement pre-bonding piece; and (3) fixing the crystal optical cement pre-bonding piece, applying pressure of 0.2-5 MPa perpendicular to the bonding surface again through a stainless steel spring, embedding the crystal optical cement pre-bonding piece by adopting MF2 crystal powder, and carrying out heat treatment in a muffle furnace at the temperature of 400-650 DEG C to obtain the rare earth doped alkaline earth fluoride / alkaline earth fluoride bonding crystal.

The invention discloses a preparation technology of a PVA film in the technical field of polaroids. The preparation technology comprises the steps of washing, swelling, dyeing, stretching, color fixing and drying. Nanoparticles and a photochemical cross-linking agent are added in the swelling treatment step; in the dyeing treatment step, ultrasonic vibration of 40 kHz to 50 kHz is adopted in a potassium iodide dyeing solution, so that the dyeing uniformity is improved; in the stretching treatment step, dynamic multidirectional stretching is utilized, and the stretching temperature is combined to balance the mechanical property and the optical property of the film; in the color fixing process, an ultraviolet light chemical treatment step is combined, and meanwhile, nano coating deposition is carried out on the surface of the dried PVA film; by introducing a dynamic multidirectional stretching technology and an ultrasonic-assisted dyeing process, ordered arrangement of iodine molecules in the film is ensured, the polarization efficiency and polarization degree of the film are greatly improved, meanwhile, good optical uniformity and stability are kept, and the requirement of high-end display equipment for the precise polarization effect is met.

This invention belongs to the field of quartz glass preparation technology, and discloses a blowtorch for quartz glass preparation and a method for preparing quartz glass. The blowtorch for quartz glass preparation includes a raw material chamber, a first annular oxygen chamber, an annular hydrogen chamber, and at least two first mounting chambers. Each first mounting chamber is provided with a first adjusting tube, which extends into the annular hydrogen chamber. The first adjusting tube includes a first straight tube and a second straight tube, with the second straight tube fixed to one end of the first straight tube and inclined relative to it. Multiple first adjusting tubes are selectively arranged in the same first mounting chamber, and the inclination angles of the second straight tubes relative to the first straight tubes are all different. This invention, without changing the basic structure of the blowtorch for quartz glass preparation, can flexibly adjust the coverage area of ​​the oxyhydrogen flame, making the temperature distribution on the deposition surface more uniform, improving the uniformity of hydroxyl concentration, and thus improving the optical uniformity of the product.

The invention relates to the technical field of analysis and detection, in particular to a soil nutrient detection device based on a near infrared spectrum technology, which comprises a control handle, a fixed disc is fixedly connected to the outer wall of the control handle, a rotating disc is rotatably connected to one end, away from the control handle, of the fixed disc, and a gear ring is fixedly connected to the outer wall of the rotating disc. The gear and the gear ring are meshed with each other, a plurality of sampling mechanisms capable of sampling soil are fixedly mounted in the gear ring, a plurality of rotary power-assisted mechanisms are fixedly mounted at one end, close to the fixed disc, of the gear ring, and the rotary power-assisted mechanisms can rotate the sampling mechanisms, so that the sampling mechanisms can better sample the soil; each group of sampling mechanism is internally provided with a discharging structure capable of discharging soil, the outer wall of the fixed disc is fixedly provided with an infrared spectrometer, and the infrared spectrometer can detect the soil in the corresponding sampling mechanism and can sample excessive soil.

The application relates to the technical field of quartz sand purification, and discloses a purification treatment process for high-purity quartz sand production, which comprises the following steps: step S1, ore pretreatment: the raw ore is subjected to crushing, ore grinding, grading, magnetic separation, scrubbing, concentration and dewatering and other treatment modes to obtain fine quartz sand concentrate; step S2, grading washing and precision microfiltration: the quartz concentrate slurry after flotation is subjected to multistage countercurrent washing and high-molecular composite material microfiltration in sequence to obtain once-purified quartz material; and step S3, high-temperature chloridizing roasting: the once-purified quartz material is dewatered. According to the application, more than 80% of the easily removed impurities are removed in advance through multistage crushing, grading, magnetic separation and scrubbing, qualified fine concentrate is obtained, and higher guarantee is provided for the overall sandstone quality; and through the introduction of the core steps of high-temperature chloridizing roasting and high-temperature vacuum hydroxyl removal, key impurities such as aluminum (Al) and boron (B) existing in the form of isomorphism in the quartz lattice can be effectively removed.

The invention discloses a preparation method of a doped and wrapped film structure, and belongs to the technical field of film preparation. Comprising the following steps: S1, cleaning a substrate material and feeding the substrate material into a sputtering chamber; s2, taking a ZnS target and a ZnO target as sputtering target materials, and sequentially carrying out the following coating steps on the substrate by using magnetron sputtering equipment: (a) vacuumizing a sputtering chamber to 1.0 * 10 <-4 > Pa, and introducing argon to carry out pre-sputtering; (b) sputtering to form a first ZnS layer; (c) sputtering to form a ZnO layer; (d) performing co-sputtering of ZnS and ZnO to form a co-doped layer; (e) sputtering to form a second ZnS layer; and S3, placing the coated sample in an oxygen atmosphere, and carrying out high-temperature annealing treatment to obtain the doped and wrapped film structure. The preparation method is simple and controllable in preparation process, good in stability and suitable for the window layer of the efficient thin-film solar cell.

The application discloses a kind of doped modified transmittance gradient vehicle HOE holographic transparent film and preparation method thereof.Transparent film includes HOE film body and the doped transition zone being arranged at its edge, and the doped transition zone is continuously distributed along HOE film body circumference, and the thickness is consistent with holographic function layer;Doped material is liquid crystal material, nanometer silicon dioxide particles or PMMA microsphere, and doping concentration gradually changes from HOE film body side to glass side;Preparation method includes substrate preparation, gradient doping slurry configuration, gradient coating, mask holographic exposure, overall curing and performance detection.The application transmittance accurately changes, realizes edge transmittance continuous transition without increasing obvious thickness step, and is visually insensitive;Transition zone optical uniformity is better, does not affect the XR display effect of HOE film, preparation process is compatible, is suitable for mass production, is closely combined, has strong weather resistance, and has no risk of falling off.

The present invention provides a large-size quartz glass and a preparation method and system thereof, comprising the following steps: performing a dehydroxylation treatment and a sintering treatment on the silicon dioxide loose body to obtain a quartz glass blank; placing the quartz glass blank in a mold cavity for a first differential heat treatment and applying pressure to the quartz glass blank in a first direction to obtain the quartz glass; wherein the mold cavity includes a first temperature region and a second temperature region in sequence along the first direction, and the quartz glass blank includes a second part corresponding to the second temperature region and a first part corresponding to at least part of the first temperature region; in the first differential heat treatment, the temperature of the second temperature region is higher than the temperature of the first temperature region, and the temperature of the second temperature region is not less than 1600°C, so that the preparation of high-quality quartz glass with large size, low hydroxyl content and good optical uniformity can be achieved.

This invention relates to the field of organic functional crystal growth technology, specifically a method for growing organic crystals based on the control of the included angle of the inner wall of a crucible. The method employs a quartz crucible with an axisymmetric conical inner cavity, and controls the included angle β of the inner wall of the crucible to be 10°–30°, preferably 15°–20°. After loading the organic crystal raw material into the crucible, a vacuum of 1×10⁻⁶ is applied. ‑2 After being sealed by welding, and after passing the pre-growth inspection and sealing, the melt is placed in a Bridgman crystal growth furnace for heating and melting and held at that temperature for 24 hours. The axial temperature gradient is controlled, and the melt is directionally solidified and grown from bottom to top at a rate of 1-1.5 mm / h. The organic single crystal is then slowly cooled to obtain the organic single crystal. This invention optimizes the melt flow field and solid-liquid interface by adjusting the crucible angle, reduces the radial temperature gradient, reduces defects such as crystal cracks and dislocations, and improves crystal integrity and optical uniformity. The process is simple, has good repeatability, and is suitable for large-size, high-quality growth of organic scintillation crystals and organic optoelectronic crystals.

The application discloses an acrylic mirror panel for a sound panel, which comprises, from top to bottom, a varnish protection layer, an aluminum plating layer and an acrylic substrate layer, wherein the varnish protection layer is formed by a varnish spray curing process with components of acrylate resin, polyurethane acrylate resin and photoinitiator. A preparation method of the acrylic mirror panel for the sound panel comprises vacuum aluminum plating, varnish spraying and curing steps, and the panel has excellent wear resistance, adhesion and high reflectivity.

The utility model relates to a photovoltaic - display integration quantum dot backlight module of display technical field, including photovoltaic element layer, optical coupling layer, quantum dot film layer and conductive and optical modulation layer who laminated and bonded in proper order, photovoltaic element layer is silicon -based solar cell panel, optical coupling layer includes high light transmittance polymer base, and the upper surface of high light transmittance polymer base is distributed micron -sized prism array or diffusing reflection particle, and the lower surface of high light transmittance polymer base is plated with anti -reflective film, quantum dot film layer includes main part and the perovskite quantum dot of embedding main part, and conductive and optical modulation layer includes conductive layer and optical modulation layer. The utility model reduces the dependency on power supply, realizes two -way light energy utilization, reduces power consumption, and the display picture color is more bright and colorful, real, improves optical uniformity while isolating external interference, ensures long -term stable light emission under the complex environment outdoors, relieves thermal stress, prevents material corrosion and cracking, and the module stability is high.

The invention discloses a preparation method for synchronously generating a perovskite quantum dot and silicon dioxide aerogel composite material through color conversion, and relates to the field of quantum dot preparation, and the preparation method comprises the following steps: firstly, dissolving cesium bromide and lead bromide in anhydrous N, N-dimethylformamide, fully stirring, adding oleic acid and aminopropyltriethoxysilane, and stirring to obtain a mixed solution; performing ultrasonic oscillation to obtain a uniform precursor solution; then, mixing TEOS (tetraethyl orthosilicate) and the precursor solution, and stirring while heating to promote sol-gel conversion; adding absolute ethyl alcohol, dropwise adding ammonia water, continuously and fully stirring, and adjusting the pH value to form a uniform homogeneous sol solution; then vacuumizing and circulating nitrogen, adding a cesium oleate solution and continuously stirring to control the perovskite quantum dots to be uniformly generated in a silicon dioxide network, completing sol-gel transformation and forming a stable SiO2 (at) CsPbBr3 composite material; and finally, performing supercritical CO2 drying to finish the formation of silicon dioxide aerogel and the encapsulation of the quantum dots.

The application discloses a silica smelting kiln and belongs to the technical field of industrial kilns. The silica smelting kiln comprises a kiln main body, the inside of the kiln main body is provided with a fire dividing fence, the upper portion of the fire dividing fence is divided into a high-temperature smelting area, a heat preservation area and a cooling area, and the lower portion of the fire dividing fence is a fire supply area; a material conveying track is outwardly mounted to the inside of the kiln main body, a composite fixing assembly is slidably connected to the material conveying track, a silica containing tank is fixed to the composite fixing assembly, three sliding sleeves are slidably connected to the material conveying track, and a rotating wheel is fixedly installed to the outside of the middle sliding sleeve. The silica smelting kiln can solve the problem of local raw material or insufficient smelting caused by traditional static heating, the defects such as internal bubbles and stress cracks of the smelted product are greatly reduced, the optical uniformity and mechanical strength are significantly improved, the heat energy utilization rate is significantly improved, and the energy cost is directly reduced.

The application relates to the field of glass products, and discloses a low-haze glass and a preparation method and application thereof. The method comprises the following steps: (1) polishing aluminum-silicon glass in the presence of a polishing solution to obtain an intermediate product I; (2) performing first etching on the intermediate product I in etching solution I to obtain an intermediate product II; the first etching conditions comprise: an etching thickness of 1-2 microns; the height difference of the surface of the intermediate product II within any 40 microns*40 microns range is not greater than 0.25 microns; and (3) performing second etching on the intermediate product II in etching solution II to obtain the low-haze glass; the second etching conditions comprise: an etching thickness of 30-80 microns. The low-haze glass prepared by the method has better optical uniformity, and the yield in the preparation of low-haze glass products from float aluminum-silicon glass is greatly improved.

This invention relates to the field of polymer materials technology and discloses a method for manufacturing high far-infrared emission therapeutic glasses. The method includes: performing double-layer surface modification on far-infrared negative ion functional powder to obtain modified functional powder compatible with a polymer matrix; pre-dispersing and melt-blending the modified functional powder with a polymer matrix material in steps to obtain a blend; forming a functional powder enrichment region on the surface of the glasses by injection molding and applying a segmented electric field; polarizing the region based on the thickness of the enrichment region using a formula to determine the polarization electric field strength; and simultaneously performing radiation crosslinking treatment to anchor the crosslinked network to an oriented structure. This invention solves the technical problems of uneven functional powder dispersion and poor electret stability, achieving a synergistic effect of surface functional enrichment and long-lasting electret effect. The prepared glasses have durable and stable far-infrared emission and negative ion therapeutic functions.

The present application belongs to the technical field of high borosilicate glass, and particularly relates to a low expansion coefficient high borosilicate glass and a preparation method. The raw materials of the high borosilicate glass include, by weight: 65-75 parts of silicon dioxide, 20-25 parts of boron oxide, 2-5 parts of zinc oxide, 2-5 parts of sodium oxide, 1.2-2 parts of aluminum oxide, 0.1-0.5 parts of lithium oxide, and 0.2-0.6 parts of silicon dioxide microspheres containing octadecane. After mixing, the raw materials are melted until the raw materials are completely melted to form glass liquid. After clarifying and blowing annealing, the high borosilicate glass is obtained. The obtained high borosilicate glass has a lower expansion coefficient and superior resistance to cold and hot shock, which improves the thermal shock resistance of the material and prolongs the service life.

The invention belongs to the field of diamond crystal materials, and particularly relates to a preparation method of optical-grade diamond. The method comprises the following steps: carrying out epitaxy by adopting an MPCVD method to obtain a diamond crystal; polycrystals on the surface and the side face of the diamond are removed through laser cutting and laser polishing; carrying out high-temperature and high-pressure annealing on the processed crystal in a cubic press; and after annealing is finished, the crystal is subjected to surface treatment such as grinding and polishing. The diamond prepared by the method has the characteristics of small stress birefringence, good optical uniformity and high optical transmittance, and can be used as a Raman laser gain medium.