21 results about "Ytterbium fluoride" patented technology

The invention provides a design method and a preparation method of a 2-5.5 [mu] m high-transmittance film on a ZnSe substrate. The design method of the ZnSe substrate 2-5.5 [mu] m high-transmittance film comprises the following steps: Sa, film system design: 550 nm is used as a reference wavelength for optical film design, a film stack formula: Sub / 0.6 (LHL) 2MK / AIR is used, two sides of Sub are plated with the same film system, Sub is a ZnSe substrate, AIR represents air, in the film stack expression, H represents a high-refractive-index material ZnSe (zinc selenide) with the wavelength thickness of 1 / 4, L represents a low-refractive-index material YbF3 (ytterbium fluoride) with the wavelength thickness of 1 / 4, and the thickness of YbF3 is 1 / 4. K represents a protective layer material Al2O3 (aluminum oxide) with the wavelength thickness of 1 / 4, and M represents a connecting layer material Y2O3 (yttrium oxide) with the wavelength thickness of 1 / 4; sb, generating a film layer structure of Sub / YbF3 / ZnSe / YbF3 / ZnSe / YbF3 / Y2O3 / Al2O3 / Air according to an input film stack formula; sc, the thickness of the film layer is optimized through thin film design software, the optimal thickness of the film layer is obtained, and the transmittance of the optimized film layer structure at the wave band of 2-5.5 microns reaches the target; and Sd, inputting the optimized optimal film thickness into a control computer of the coating machine.

The invention relates to a dual-band anti-reflection zinc selenide metallized light window and a preparation method thereof, the dual-band anti-reflection zinc selenide metallized light window comprises a front film system, a zinc selenide substrate, a back film system and edge metallized films, the zinc selenide substrate is located between the front film system and the back film system, and the edge metallized films are located at two ends of the zinc selenide substrate; the front film system and the back film system are formed by alternately overlapping zinc sulfide layers and ytterbium fluoride film layers; the edge metallized film is formed by overlapping a chromium film layer, a copper film layer, a nickel film layer and a gold film layer. According to the invention, the two sides of the zinc selenide substrate are respectively provided with an anti-reflection film system structure, so that the light energy of two wave bands of 3500-5000nm and 8000-12000nm is improved; the zinc sulfide and ytterbium fluoride film layer is adopted, so that the stress is lower, and the dual-band anti-reflection optimization effect is better; by improving the edge metallized film stacking structure, the problem that the soft optical material and the metallized film are not firmly combined is solved, and a new scheme is provided for infrared detector welding.

The invention discloses a near-net-shape preparation process of high-light-transmittance large-size magnesium aluminate spinel ceramic, and belongs to the technical field of preparation of high-performance transparent ceramic. The process comprises the following steps: firstly, mixing magnesium aluminate spinel raw material powder with a lithium-free composite sintering aid according to a mass ratio, wherein the composite sintering aid consists of magnesium fluoride, ytterbium fluoride and ytterbium oxide according to a molar ratio; performing cold isostatic pressing on the mixed powder to prepare a preformed blank, crushing, and performing high-low pressure circulation pressurization near-net forming. The obtained green body is firstly subjected to hot pressing and presintering, then placed in a fluorine-containing atmosphere to be treated and finally subjected to hot isostatic pressing sintering, and a finished product is obtained through aftertreatment. According to the technology, the bottleneck of large-size component preparation is successfully overcome, net forming of the magnesium aluminate spinel ceramic with the diagonal size larger than 400 mm is achieved, the light transmittance of a finished product in the wavelength range of 400 nm to 800 nm exceeds 93%, the breaking strength reaches 194 MPa or above, and meanwhile the raw material cost and equipment dependence are remarkably reduced.

The invention belongs to the field of coating materials, and discloses an ytterbium fluoride coating material and a preparation method thereof, the ytterbium fluoride coating material comprises ytterbium fluoride, sodium fluoride and lead fluoride, the mass ratio of ytterbium fluoride to sodium fluoride to lead fluoride is x: y: z, x is 80-95, y is 1-18, z is 1-15, and x + y + z = 100; in the ytterbium fluoride coating material, the ytterbium element, the sodium element and the lead element are uniformly distributed. According to the optical coating material prepared by doping sodium fluoride and lead fluoride into ytterbium fluoride and smelting, the oxygen content in the ytterbium fluoride material can be controlled, the possibility that ytterbium ions are converted from trivalent to divalent at high temperature is reduced, the high-temperature stability of the ytterbium fluoride material is improved, the crystal purity is high, no other mixed color exists, and the optical coating material is suitable for industrial production. A film obtained by coating the optical coating material is low in stress, so that the film is not easy to crack, and the scattering and absorption of the film layer are reduced.

Provided are a design method and a preparation method of a ZnSe substrate 2-5.5 μm high-transmittance thin film. The design method of the ZnSe substrate 2-5.5 μm high-transmittance thin film comprises the following steps: Sa, a film system is designed with 550 nm as a reference wavelength for optical thin film design, and a film stack formula Sub / 0.6(LHL)^2MK / AIR is used, and the film system is plated on both surfaces of the substrate; wherein, Sub is a ZnSe substrate, and AIR represents air, and in the film stack expression: H represents a 1 / 4 wavelength thickness of a high-refractive-index material ZnSe (zinc selenide), L represents a 1 / 4 wavelength thickness of a low-refractive-index material YbF3 (ytterbium fluoride), K represents a 1 / 4 wavelength thickness of a protective layer material Al2O3 (aluminum oxide), and M represents a 1 / 4 wavelength thickness of a connecting layer material Y2O3 (yttrium oxide); Sb, a film layer structure of Sub / YbF3 / ZnSe / YbF3 / ZnSe / YbF3 / Y2O3 / Al2O3 / Air is generated through the input film stack formula; Sc, the film layer thickness is optimized through a thin film design software, and the best film layer thickness is obtained, and the transmittance of the optimized film layer structure reaches a target in a 2-5.5 μm wave band; and Sd, the optimized best film layer thickness is input into a control computer of a film plating machine.

The application discloses a near-net forming preparation process of high-transmittance large-size magnesium-aluminum spinel ceramics, and belongs to the technical field of preparation of high-performance transparent ceramics. The process is characterized by the following steps: firstly, magnesium-aluminum spinel raw material powder is mixed with lithium-free composite sintering additives according to a mass ratio; the composite sintering additives are composed of magnesium fluoride, ytterbium fluoride and ytterbium oxide in a molar ratio; the mixed powder is cold isostatic pressed into a preform; after being crushed, the preform is subjected to high-low pressure cycle pressing near-net forming; the obtained blank is first hot-pressed and pre-sintered, then is treated in a fluorine-containing atmosphere, and finally is subjected to hot isostatic pressing sintering; and finally, the finished product is obtained through post-processing. The process successfully overcomes the bottleneck in the preparation of large-size components, realizes the net forming of the magnesium-aluminum spinel ceramic with a diagonal size greater than 400 mm, the transmittance of the finished product is more than 93% in the wavelength range of 400 nm to 800 nm, the bending strength is more than 194 MPa, and the raw material cost and equipment dependence are significantly reduced.

The application belongs to the technical field of glass-ceramics material, and provides high-strength glass-ceramics and a preparation method thereof, the glass-ceramics comprises the following raw materials in parts by weight: 48-60 parts of silicon oxide, 5-8 parts of calcium oxide, 8-12 parts of aluminum oxide, 4-6 parts of diaphosphorus pentoxide, 3-5 parts of zirconium oxide, 5-7 parts of lithium oxide, 1-3 parts of titanium oxide, 0.01-0.04 parts of potassium oxide, 0.01-0.02 parts of tin dioxide, 0.005-0.01 parts of sodium fluoride, 0.005-0.01 parts of ytterbium fluoride, 0.001-0.005 parts of a clarifying agent and 0.01-0.1 parts of a colorant. The glass-ceramics has high strength and impact strength, is not prone to thermal expansion or thermal deformation, and can be widely applied in the fields of optical devices, electronic display and the like.

This invention discloses a rare-earth metal fluoride superionic conductor dielectric film and its preparation method. The dielectric film is prepared from a rare-earth metal fluoride superionic conductor using a thermal evaporation method. The rare-earth metal fluoride superionic conductor is selected from scandium fluoride, yttrium fluoride, lanthanum fluoride, cerium fluoride, neodymium fluoride, samarium fluoride, europium fluoride, gadolinium fluoride, holmium fluoride, erbium fluoride, ytterbium fluoride, praseodymium fluoride, promethium fluoride, terbium fluoride, dysprosium fluoride, thulium fluoride, and lutetium fluoride. This invention utilizes thermal evaporation to heat and evaporate the rare-earth metal fluoride source material into a gaseous state within an evaporation system. The gaseous fluoride directly adheres to a substrate placed above the source material and recrystallizes. This allows for controllable thickness and defect number of the rare-earth metal fluoride, resulting in high integration. Therefore, rare-earth metal fluoride superionic conductor dielectric materials show great potential in the design and manufacture of novel functional devices.

The present invention discloses a wide-spectrum infrared transmission filter window that cuts off ultraviolet and visible light. The window substrate is a zinc selenide crystal, and a broadband cutoff film is designed on one side of the substrate. The main film system adopts a long-wave filter-type film structure, with zinc selenide and ytterbium fluoride as high and low refractive index materials, respectively. Two cutoff film stacks are used to achieve broadband cutoff, and matching layers are added at both ends of the main film system. The infrared band transmittance is improved by optimizing the matching layers; a wide-spectrum anti-reflection film is designed on the other side of the substrate. The optical thin film preparation process of the filter window adopts appropriate deposition temperature, deposition rate, and ion-assisted deposition processes. The window can prevent light in a wide band of 0.20μm to 0.80μm from passing through, and allows light in a wide band of 0.92μm to 15.50μm to pass through and reach the infrared detector response area through the subsequent optical path. The filter window of the present invention has stable performance and good reliability, and is suitable for spectral selection in infrared imaging systems.

The present invention relates to a method for antimicrobial protection applied to hides in the tanning process incorporating a biocidal composition and an additive allowing the Identification of its presence by means of a luminescent effect, as well as certifying its originality using luminescence encryption techniques, wherein the composition is added in the tanning process immediately after adding the chromium or titanium salts and in an amount between 0.1 % and 5 % by weight of the material to be tanned and comprises: silver phosphate glass between 3 % and 5 %; silicone in an amount between 1 % and 3.5 %; aliphatic hydrocarbons between 0.1 % and 0.30 %; and water between 90 % and 95 %, and the luminescent additive is added in an amount between 0.1 % and 5 % by weight of the material to be tanned and comprises between 20 % and 40 % silica; alumina in a proportion between 10 % and 30 %; calcium fluoride between 30 % and 50 %; erbium (III) fluoride between 0.5 % and 3 %; ytterbium (III) fluoride between 5 % and 15 %; thulium (III) fluoride in a maximum amount of 5 %; and europium (III) fluoride in a maximum amount of 5 %, with respect to the total weight of the luminescent additive.

The invention discloses a preparation method of silicon nitride ceramic. The preparation method comprises the steps of organic glue preparation, recycled slurry treatment, recycled material treatment, ball milling and mixing, defoaming and aging, tape casting, blanking and isolation powder application, air glue discharging, pressure sintering and sand blasting treatment. The prepared silicon nitride substrate is good in flatness, low in roughness and high in mechanical property. The acrylonitrile-butadiene-styrene copolymer and polyaspartic acid ester composite adhesive is adopted, so that the fracture toughness of the material is improved; the ytterbium fluoride and strontium hexaboride composite sintering aid is adopted, so that the roughness of the material is reduced; organic silicon fluorine and a BYK-3902P composite flatting agent are adopted, so that the warping degree of the material is reduced, and the smoothness of the material is improved.

The invention belongs to the technical field of microcrystalline glass materials, and provides high-strength microcrystalline glass and a preparation method thereof. The microcrystalline glass is prepared from the following raw materials in parts by weight: 48 to 60 parts of silicon oxide, 5 to 8 parts of calcium oxide, 8 to 12 parts of aluminum oxide, 4 to 6 parts of phosphorus pentoxide, 3 to 5 parts of zirconium oxide, 5 to 7 parts of lithium oxide, 1 to 3 parts of titanium oxide, 0.01 to 0.04 part of potassium oxide, 0.01 to 0.02 part of tin dioxide, 0.005 to 0.01 part of sodium fluoride, 0.005 to 0.01 part of ytterbium fluoride, 0.001 to 0.005 part of clarifying agent and 0.01 to 0.1 part of coloring agent. The microcrystalline glass provided by the invention has relatively high strength and impact strength, is not easy to generate thermal expansion or thermal deformation, and can be widely applied to the fields of optical devices, electronic display and the like.

The invention relates to the biocidal and photoluminescent treatment of viscose fibers immediately after the addition of carbon disulfide (xanthation) in the conversion of cellulose into viscose, comprising a biocidal composition and an additive allowing the presence of the biocidal composition to be recognized by the luminescent effect, the biocidal composition is added in an amount of 0.1 wt%-5 wt% of the material and comprises 3%-5% of silver-loaded phosphate glass, 1%-3.5% of silicone, 0.1%-0.3% of aliphatic hydrocarbon and 90%-95% of water, and the luminescent additive is added in an amount of 0.1 wt%-5 wt% of the material. The luminescent additive comprises 20-40% of silica gel oxide, 10-30% of alumina gel, 30-50% of calcium fluoride, 0.5-3% of erbium (III) fluoride, 5-15% of ytterbium (III) fluoride, up to 5% of thulium (III) fluoride and up to 1% of europium (III) fluoride, relative to the total weight of the luminescent additive.

A display device with a window where the window has low reflectance and excellent mechanical strength. The window has multiple layers. One layer includes silica (SiO2), fused silica, fluorine-doped fused silica, magnesium fluoride (MgF2), calcium fluoride (CaF2), aluminum fluoride (AlF3), yttrium fluoride (YF3), ytterbium fluoride (YbF3), aluminum oxide (Al2O3), magnesium oxide (MgO), or any combination thereof; and the layer has a refractive index in a range of about 1.3 to about 1.6 at a wavelength of about 550 nm.

The invention belongs to the technical field of photoelectric detection and sensing and infrared imaging, and relates to a high-hardness antireflection film window processing method applied to an atmospheric infrared window wave band. Comprising the following steps: selecting a zinc selenide infrared crystal as a window material, selecting zinc selenide, ytterbium fluoride, zirconium oxide and diamond-like carbon as optical thin film materials, designing a film system structure, and respectively completing plating of a first surface film system structure and a second surface film system structure and finished product detection by adopting a vacuum coating mode. Compared with the prior art, the surface hardness, corrosion resistance, adhesion resistance and infrared band transmittance of the infrared crystal window are improved, the infrared crystal window has excellent infrared spectrum transmission performance and environmental adaptability, the service life of the infrared crystal window is prolonged, long-term stable operation of an infrared detection system is guaranteed, and the service life of the infrared detection system is prolonged. And a solid foundation is provided for iteration upgrading of infrared detection and infrared imaging equipment.

The invention provides a very long wave infrared detector and a back anti-reflection film preparation method thereof, and the preparation method comprises the steps: placing a tellurium-cadmium-mercury detector to be plated and an accompanying sheet on a clamp based on coating equipment; zinc sulfide and ytterbium fluoride are used as thin film materials, process setting is carried out through coating equipment, and the back anti-reflection thin film of a multi-layer alternating structure is prepared through the set process; performing optical testing on the accompanying film to evaluate the quality of the film; and testing the performance of the mercury cadmium telluride detector. The very-long-wave tellurium-cadmium-mercury detector back anti-reflection film prepared from zinc sulfide and ytterbium fluoride materials not only can significantly improve the optical performance of the detector, but also can ensure the reliability and stability of the detector under various environmental conditions, so that the detector has higher practical value in the fields of remote sensing detection, space flight and aviation, environmental monitoring and the like.

The application belongs to the technical field of infrared coating and discloses a high-durability antireflection film for chalcogenide glass in the 3-5 mu m infrared band, which comprises a film system structure symmetrically arranged on both sides of a chalcogenide glass substrate, wherein the film system structure comprises, in sequence from the inside to the outside of the chalcogenide glass substrate, a first germanium layer, a first zinc sulfide layer, a second germanium layer, a second zinc sulfide layer, a third germanium layer, a third zinc sulfide layer, a ytterbium fluoride layer, a fourth zinc sulfide layer and a lanthanum fluoride layer. The film system structure is arranged on the chalcogenide glass substrate to improve the wear resistance, corrosion resistance and transmittance of the lens.

A biocidal and photoluminescent treatment of viscose fibre immediately following the addition of carbon disulfide in the conversion of cellulose into viscose (xanthation), which comprises a biocidal composition and an additive that allows the presence thereof to be identified by a luminescent effect, wherein the biocidal composition is added in an amount of 0.1-5 wt % of the material and comprises 3-5% phosphate glass with silver, 1-3.5% silicone, 0.1-0.3% aliphatic hydrocarbons and 90-95% water, and the luminescent additive is added in an amount of 0.1-5 wt % of the material and comprises 20-40% silica gel, 10-30% alumina gel, 30-50% calcium fluoride, 0.5-3% erbium (III) fluoride, 5-15% ytterbium (III) fluoride, a maximum of 5% thulium (III) fluoride and a maximum of 1% europium (III) fluoride, with respect to the total weight of the luminescent additive.

The invention provides ytterbium fluoride particles and a preparation method thereof. The preparation method of the ytterbium fluoride particles comprises the following steps: S1, in an inert atmosphere, heating ytterbium fluoride powder to obtain molten ytterbium fluoride; the heating temperature ranges from 1170 DEG C to 1600 DEG C, and the pressure of the inert atmosphere ranges from 200 pa to 300 pa; s2, mixing the molten ytterbium fluoride with a fluorine nitrogen compound, and then cooling under a vacuum condition to obtain ytterbium fluoride particles; the temperature of the mixing treatment is 1170 to 1600 DEG C. According to the technology, the single-phase polycrystalline ytterbium fluoride particles can be prepared, the purity of the single-phase polycrystalline ytterbium fluoride particles is 99.99% or above, and the ytterbium fluoride particles do not contain OH impure phases and have high yield.

The present invention discloses an additional antimicrobial protection step applied to leather in the post-tanning process which incorporates a biocide composition and an additive that allows its presence to be identified by means of a luminescent effect, in addition to certifying its authenticity using encryption techniques of the luminescence, wherein the composition is added in the tanning process immediately after the addition of chromium or titanium salts in an amount between 0.1% and 5% of the weight of the material to be tanned and comprises between 3% and 5% of silver phosphate glass; between 1% and 3.5% of silicone; between 0.1% and 0.30% of aliphatic hydrocarbons; between 90% and 95% of water, and the luminescent additive is added in an amount between 0.1% and 5% of the weight of the material to be tanned and comprises between 20% and 40% of silica; alumina in a proportion between 10% and 30%; between 30% and 50% of calcium fluoride; between 0.5% and 3% of erbium(III) fluoride; between 5% and 15% of ytterbium(III) fluoride; a maximum of 5% of thulium(III) fluoride; and a maximum of 5% of europium(III) fluoride, with respect to the total weight of the luminescent additive.

The application provides a low-absorption long-wave infrared polarizer and a manufacturing method thereof, the polarizer comprising a zinc sulfide and ytterbium fluoride film, a high-resistance silicon substrate, a silicon grating, and a double-layer gold film, the double-layer gold film being respectively covered on the bottom of the dielectric grating groove and the top of the grating line, since the refractive index of the zinc sulfide is lower than that of silicon and the zinc sulfide has no absorption, the filling layer can improve the transmittance of TM polarized light, meanwhile, since the zinc sulfide film belongs to a hard film, the gold film can be greatly protected, and the robustness of the polarizer is improved, ytterbium fluoride and zinc sulfide films are plated on the back side of the packaged grating, according to the optical absorption characteristics of the plating film material, the antireflection film design is optimized, and the transmittance can be further improved, the application solves the inherent absorption problem of 9um of the polarizer with a silicon substrate at home and abroad, further improves the absorption of the polarizer after 10um, and improves the stability of the polarizer while ensuring high extinction ratio and high transmittance.