111results about How to "Effective scattering" patented technology

The invention discloses a nanophase doped bismuth telluride-based thermoelectric material and a preparation method thereof. The bismuth telluride-based thermoelectric material is characterized in taking the bismuth telluride-based thermoelectric material containing a tellurium element, a bismuth element and a doped chemical element, as a matrix. The doped nanophase is a one-dimensional nanophase,and the weight of the one-dimensional nanophase accounts for 0.01-5 percent of the weight of the matrix. Attapulgite or a zinc oxide nanowire or a single-wall carbon nanotube or a multi-wall carbon nanotube is preferable to the one-dimensional nanophase. Compared with the prior art, in the bismuth telluride-based thermoelectric material, the lattice heat conductivity within the whole temperature zone range is reduced, thereby a ZT value is greatly improved and the thermoelectric performance of the bismuth telluride-based thermoelectric material is improved. The preparation method is simple and easy to implement, and compared with other methods of balling milling or liquid phase and the like, impurities are not easy to introduce in the preparation method so that the one-dimensional nanophase is evenly staggered and distributed in the matrix and the mechanical property of the material is effectively improved.

A process for preparing a hydrophobic solution and a hydrophobic glass used for the windscreen of car is disclosed. Said hydrophobic solution is prepared from CF3(CF2)5C2H4Si(OC2H5)3, Si(OC2H5)4, C2H5OH, deionized water, and hydrochloric acid through proportional mixing, and stirring for 5-20 hr. Said hydrophobic glass is prepared through cleaning glass, preparing said hydrophobic solution, coating it on the surface of glass, and solidifying at 250-350 deg.C for 10 min -72 hr to form a firm hydrophobic film.

The invention discloses a water-based nano reflection and heat insulation transparent coating and a preparation method thereof. The formula of the coating comprises the followings in percentages by weight: 35%-50% of a water-based acrylic emulsion, 5%-15% of water-based lithium silicate, 5%-15% of a water-based polyurethane emulsion, 5%-10% of a water-based heat insulation nano dispersion sizing agent, 5%-10% of a water-based heat insulation and heat preservation nano dispersion, 2%-12% of a wetting dispersant, 0.2%-0.5% of a flatting agent, 0.2%-1% of a thickener, 0.1%-0.2% of an antifungus and anti-mildew agent, 0.5%-2.5% of a coalescing agent, 0.5%-2% of a silane coupling agent and 5%-25% of deionized water. According to the water-based nano reflection and heat insulation transparent coating disclosed by the invention, under the precondition of without influencing lighting, heat radiation is blocked and infrared heat energy is prevented from being conducted into the interior of a base material through effective reflection and heat energy conduction, and thus the effects of heat insulation and heat preservation are reached. Heat energy, entering the room through the base material, generated by an outdoor heat source can be effectively blocked in summer, and indoor heat can be effectively blocked from being dispersed in winter, so that the application of refrigeration and heat preservation equipment can be effectively reduced, and the energy-saving effect is obvious.

The present invention relates to filled skuterudite-base thermoelectrical composite material and its preparation process, and belongs to the field of thermoelectrical material preparing technology. The thermoelectrical composite material has the composition of IyA4B12/zIOx, where I is one of Yb, Eu, Ce, La, Nd, Ca and Sr; A is Sb or its mixture with one of Ge, Sn, Te and Se; B is Co or its mixture with Fe or Ni; y is the amount of I element, y+z=m, and m is greater than the filling limit of filling atom. The thermoelectrical composite material is prepared through first smelting process to produce block material, the subsequent mechanical crushing and grinding to obtain powder, and the final fast sintering with pulse DC current to form compact block. The material has lowered lattice heat conductivity, maintained electric transmission performance and raised thermoelectrical conversion performance.

The invention discloses a PbTe cubic particle/grapheme composite material consisting of nano PbTe cubic particles and graphene. Owing to the dispersing, bearing and isolating functions of the graphene, the PbTe nano particles are effectively prevented from sintering in the heat treatment process, so that the grain boundary can effectively scattering phonon, and great significance on improving the thermoelectric property of the PbTe material is achieved. The composite material can serve as a thermoelectric material. The invention also discloses a preparation method of the composite material by adopting a one-step hydrothermal method or a one-step solvothermal method, and the preparation method has the advantages of simple process, low cost, short period, low energy consumption and the like.

The invention discloses a high-entropy stable rare earth tantalate/niobate ceramic and a preparation method thereof, and the preparation method comprises the following steps: taking rare earth oxide RE2O3, tantalum oxide Ta2O5, niobium oxide Nb2O5 and MO2 oxide as raw materials, and taking A3BO7 type rare earth tantalate/niobate RE<3>Ta<1-x> Nb<x>O<7> ceramic as a matrix, and adding three or more MO2 oxides to equivalently replace rare earth and tantalum/niobium elements at positions A and B to obtain the novel high-entropy stable rare earth tantalate/niobate ceramic material RE < 3-y > Ta < 1-y/2-x > Nb < x-y/2 > M < 2y > O<7>. The ceramic material prepared by the invention has the characteristics of low thermal conductivity, high thermal expansion coefficient, high hardness, high fracture toughness, controllable crystal structure and the like, and can be used as a high-temperature protection material for thermal barrier coatings, environmental barrier coatings, nuclear material storages and the like.

The invention relates to the technical field of glass, in particular to sound-insulation and thermal-insulation laminated glass and a preparation method thereof. The sound-insulation and thermal-insulation laminated glass comprises a film clamped between a first glass sheet and a second glass sheet, wherein one side, close to the film, of the first glass sheet and/or the second glass sheet is coated with a sound-insulation and thermal-insulation glue layer which is 15-20 mu m thick; the sound-insulation and thermal-insulation glue layer is prepared from substances in parts by weight as follows: 80-100 parts of a waterborne polyurethane emulsion, 0.01-0.2 parts of a leveling agent, 0.01-0.2 parts of a defoaming agent, 5-15 parts of glass beads, 1-9 parts of titanium dioxide, 1.5-5 parts of coated particles and 180-200 parts of water; titanium dioxide contained in the glue layer can scatter the passing light rays effectively, so that the light rays are prevented from transmitting through the laminated glass directly, and good thermal insulation effect of the laminated glass is guaranteed; meanwhile, each glass bead is of a hollow structure and has lower heat conducting coefficient and good chemical stability, and the glass beads contained in the sound-insulation and thermal-insulation glue layer have good thermal insulation performance.

The invention provides a diffusion agricultural film which is prepared by uniformly mixing a diffusion parent material with matrix resin and subsequently performing blow molding; and LDPE (Low-Density Polyethylene) is taken as the matrix resin. The diffusion agricultural film is characterized in that the diffusion parent material comprises at least one of zinc oxide or magnesium oxide; both the zinc oxide and the magnesium oxide are greatly different from refractive index of the matrix resin LDPE and take a shielding effect on infrared light. The prepared diffusion agricultural film has functions of achieving irradiation uniformity of light in a greenhouse and reducing the shaded area caused by direct irradiation of the light and the damage to the crops; and meanwhile, the zinc oxide and the magnesium oxide take a good shielding effect the on infrared light, so that the agricultural film has good heat insulation property. Compared with the conventional agricultural film, the temperature in the greenhouse is increased by 2-3 DEG C, so that the greenhouse effect is achieved to a certain extent, thus the effect of increasing the yield of the crops can be achieved.

The invention belongs to the vehicle driving monitoring technical field and relates to an image pickup device for vehicle driving image acquisition. The image pickup device includes a box body and a camera; a camera mounting cavity is formed in the box body; the camera is mounted in the mounting cavity through a mounting bracket; a camera light shielding cavity communicated with the outside of the box body is formed at the front part of the box body; two sides of the light shielding cavity are attached surfaces; the box body comprises a rear cover and a front cover which are buckled to each other; the camera mounting cavity is formed at the upper part of the box body; the middle of the front cover is recessed inwards so as to form the camera light shielding cavity communicated with the outside of the box body; two sides of the front cover are attached surfaces; and the light shielding cavity is communicated with the mounting cavity. Since the camera is enclosed in the light shielding cavity, no matter how light inside and outside a vehicle changes, interference images will not appear on windshield glass corresponding to the light shielding cavity, and therefore, the camera in the light shielding cavity will not be affected, and the stability and authenticity of acquired images can be ensured.

The invention belongs to the field of functional materials, and particularly relates to an environment-friendly rubber sound-insulation material and a preparation method thereof. The material comprises the following components in percentage by weight: 1-3% of dibenzoyl peroxide, 1-3% of silicon oxide, 5-15% of recovered epoxy resin, 5-15% of composite rare-earth oxide and the balance of silicon rubber. No abundant rare materials are used in the preparation process, so the raw material cost is lowered; and the wastes are used as the raw materials, so the material preparation method is convenient in technique and simple in process. The prepared material can effectively absorb energies, can be used in the fields of transportations, architecture, military affairs and the like, has the functions of shock resistance, impact buffering, heat insulation, sound insulation and the like, and is especially suitable to be used as a saloon car damping fin.

The invention discloses an OLED (Organic Light Emitting Diode) display panel and a fabrication method. The OLED display panel comprises a substrate, an OLED luminous device, a package layer and a light scattering layer, wherein the OLED luminous device is arranged on the substrate, the package layer is packaged outside the OLED luminous device, the OLED luminous device at least comprises a red luminous device, a green luminous device and a blue luminous device, the blue luminous device adopts an optical microcavity structure, and the light scattering layer is arranged at a light giving-out side of the blue luminous device. A blue luminous device region of the OLED display panel adopts the optimal microcavity structure, thus, the color purity and the photoelectrical performance of a blue sub-pixel are improved; meanwhile, the light scattering layer is further arranged at the light giving-out side, the light giving-out efficiency of the blue sub-pixel is further improved, namely, the photoelectrical performance and the stability of the blue sub-pixel are further improved; and meanwhile, the light scattering layer can be used for effectively scattering light emitted from the blue luminous device, and thus, the problem of a visual angle caused by the adoption of the optical microcavity structure can be effectively solved.

The invention belongs to the technical field of inorganic nonmetal thermal barrier coating materials, and discloses a nanocrystalline A4B2O9 type niobate ceramic prepared through ultralow-temperature sintering, and a preparation method thereof. The structural formula of the ceramic is A4B2O9, A is one or more of Ni, Co, Mg, Ca, Sr, Ba or Zn, B is Nb1-XTaX, and X is larger than or equal to 0.5 and larger than or equal to 0. The preparation method comprises the following steps: respectively carrying out thermal insulation and thermal decomposition on A(OH)2, ACO3, niobium oxalate and tantalum oxalate to obtain AO powder, Nb2O5 powder and Ta2O5 powder; then grinding to obtain a nano-sized powder mixture with high reaction activity; and finally, sintering the mixture powder to obtain the blocky A4B2O9 type niobate ceramic. The preparation method solves the problem that the cost of preparing the thermal barrier coating material is high due to the fact that the raw materials tantalate and rare earth elements used by the existing rare earth tantalate thermal barrier coating material are high in price.

The invention belongs to the field of functional materials, and in particular relates to a material with the effects of insulating sound and reducing noise and a preparation method of the material. The invention provides the material with the effects of insulating sound and reducing noise. The material is prepared from a silicone rubber pyrolysis product, polycarbonate, a vulcanizing agent, silicon oxide, aluminum oxide, a foaming agent and a foaming aid; the material is loose and porous, can be used for effectively absorbing and scattering sound waves, has the effects of cushioning impact, insulating sound, eliminating noise and the like, and can be effectively applied to sound insulation and noise reduction of fields such as industry, military affairs, civil buildings and the like. The invention also provides the preparation method of the material with the effects of insulating sound and reducing noise. The method is simple and convenient in manufacturing technique and simple in process. According to the material and the preparation method disclosed by the invention, waste silicone rubber in waste insulator angle leftovers is used as a raw material of the silicone rubber pyrolysis product; no rare materials are used; the adopted raw materials are low in cost; besides, the problem of a way out for the waste silicone rubber is well solved, wastes are changed into valuables, and the production cost is reduced.

The invention discloses a 360-degree complete cycle type LED lamp filament based on purple light chips. The 360-degree complete cycle type LED lamp filament based on the purple light chips is composed of a substrate, the chips, transparent silica gel, inorganic nanoparticles and phosphor gel; the phosphor gel is formed by organic silicon resin, multicolor phosphor and coupling agents through an injection moulding process, and is arranged on the outer side of the transparent silica gel. The chips are the purple light chips, the emission wavelength range is 360-410 nm, the chips are fixed to one face or the obverse side and the reverse side of the substrate, the inorganic nanoparticles are TiO2 or ZrO2, the particle size is 10-100 nm, the inorganic nanoparticles are distributed in the transparent silica gel, the multicolor phosphor is red, green and blue mixed phosphor of a phosphate or silicate system, and the coupling agents are silane coupling agents. The 360-degree complete cycle type LED lamp filament based on the purple light chips has the advantages of being high in color reduction degree, even and soft in light color, capable of emitting light by 360 degrees, high in light emitting efficiency, and the like.

The invention provides a hydrophobic heat insulation and cooling film and a preparation method thereof. The hydrophobic heat insulation and cooling film is a polymer porous film, the porosity is 30% -90%, the interior of the hydrophobic heat insulation and cooling film is of a spongy structure, the pore diameters of pores are distributed in a bimodal mode, and the width distribution of the poresis 0.2 micrometer - 0.6 micrometer and 1 micrometers - 5 micrometers respectively. The preparation method of the hydrophobic heat insulation and cooling film comprises the following steps of dissolving a polymer into an organic good solvent, adding a non-solvent to prepare a precursor solution, and spraying the precursor solution onto a substrate to obtain the hydrophobic heat insulation and cooling film. The hydrophobic heat insulation and cooling film is a flexible film material with good hydrophobicity, good heat insulation effect and good cooling effect, shows very excellent flexible performance, can be bent and curled at will, can be suitable for the surfaces of base bodies with different shapes, can achieve effective cooling and refrigeration inside the base bodies, and is good in application prospect and high in practicability; the preparation method of the hydrophobic heat insulation and cooling film has the advantages of simplicity, feasibility, low production cost, high filmforming efficiency and the like, is suitable for large-scale preparation and is beneficial to industrial application.

The invention relates to photo-protection cosmetic composition containing hollow polyurethane microspheres and a preparation method of the hollow polyurethane microspheres. Specifically, the composition has unique effects in aspects of high smooth and refreshing skin feelings while protecting skin against visible sunlight radiation. The hollow polyurethane microspheres are shells with specific optical performance and specific soft and elastic skin feelings, can bring smooth and refreshing skin feelings and the like to the photo-protection cosmetic composition and can effectively increase the SPF (sun protection factor) value of sun cream.

The invention provides a lens, comprising an optical section and a fixed section connecting and surrounding the optical section. The optical section is used for making the optical beam pass-by and image, which is characterized in that the fixed section is provided with at least a rough face connected with the optical section for scattering the heterogeneous light. Additionally, the invention also relates to a lens module adopting the lens, not only scattering the heterogeneous light, but also reducing to generate the heterogeneous light, and improving the imaging quality of the lens module.

The invention provides a preparation method of an ultraviolet-proof modified special-shaped nylon filament. The preparation method includes the steps of 1), subjecting a first polyamide chip to cryogenic treatment, crushing and screening to obtain polyamide powder 150-300 in mesh; 2), mixing ultraviolet-proof powder with the polyamide powder according to the mass ratio of 30:70-50:50, and then performing melt blending for extrusion granulation to obtain modified ultraviolet-proof polyamide masterbatch; 3), blending the modified ultraviolet-proof polymide masterbatch with a second polyamide chip according to the mass ratio of 10:90-15:85, and sequentially performing melting, extruding, profiled spinning, oil applying, winding and balancing to obtain a pre-oriented filament; 4), subjecting the pre-oriented filament to post processing to obtain the ultraviolet-proof modified special-shaped nylon filament. The filament is prepared by adopting a spinning nozzle shaped in 'triangle' or 'star', the special-shaped section shaped in 'triangle' or 'star' can scatter the ultraviolet ray of the sunlight effectively, and excellent ultraviolet-proof effect in combination with ultraviolet-proof powder is achieved.

The invention discloses a ship outer plate ventilation structure, a ventilation system applying the ventilation structure and a ship. An air duct wall plate used for isolating a first structure air duct from a second structure air duct is arranged between the ship outer plate and the cabin. A shielding net module is embedded in the inner side of an outer plate of the front wall of the first structure air duct; a gas-water separation module is fixed to the shielding net module, a pneumatic shutter module is fixed to an air duct wall plate on the rear wall of the first structure air duct, a pneumatic executing mechanism is hinged and fixed to the pneumatic shutter module, a manual operation mechanism is arranged at the end of the pneumatic executing mechanism, and a deck water leakage opening is formed in a bottom plate of the first structure air duct. The air duct is simple in structure, easy to install and arrange, convenient to overhaul and high in operation efficiency, waves or rainwater is effectively prevented from invading a cabin, the air duct of the structural type is high in drainage capacity and high in effective ventilation rate, radar waves can be effectively scattered through the shielding net structure, and the good stealth effect is achieved.

The invention discloses a sunlight reflective thermal-insulation paint, and a preparation method thereof. The sunlight reflective thermal-insulation paint comprises, by weight, 35 to 50 parts of fluorocarbon resin emulsion, 5 to 15 parts of a high reflectivity pigment, 5 to 10 parts of polymer hollow micro-sphere, 5 to 10 parts of a reflective material, 5 to 15 parts of nanometer metal powder, 3 to 8 parts of nanometer silica, 0.2 to 0.5 part of a wetting dispersant, 0.4 to 0.8 part of a thickening agent, 0.2 to 0.4 part of a bactericide, 0.5 to 2.5 parts of a film forming auxiliary agent, 0.6to 1.6 parts of an antifoaming agent, and 15 to 25 parts of deionized water. The sunlight reflective thermal-insulation paint is capable of reflecting thermal energy transmission effectively, blocking heat radiation, blocking infrared heat energy, is excellent in thermal insulation performance, is low in energy consumption, is obvious in thermal insulation effect, and is long in service life; thepreparation method is simple, and is suitable for large scale production and applications.

A compound condenser with diffusion particles is provided, which comprises a substrate and a plurality of diffusion particles. The substrate is provided with a first surface and a second surface. The bend prism units are arranged on the first surface of the substrate and the diffusion particles are mixed into the bend prism units at least, which can make the ray through the second surface generate diffusion at the same time. The bend prism units have at least one bend extension curved surface to form a appropriate surface curvature change and lead the ray to generate refraction above two-dimension, and then reflect the bend prism units.

The invention relates to hollow porous microspheres coated with titanium dioxide nanoparticles and a preparation method thereof. Styrene, a bifunctional dimethacrylate organic monomer and a photoinitiator are dissolved in a solvent to obtain an electronic injection solution; modified titanium dioxide with two-bonded surface is added in and dispersed well in the electronic injection solution; electrostatic spraying is performed under visible light to obtain the hollow porous microspheres coated with titanium dioxide nanoparticles, composed of the titanium dioxide nanoparticles and crosslinkingspheres coating the surface of the titanium dioxide nanoparticles; the crosslinking spheres are hollow, have porous surface and have crosslinking structure formed by interconnection of polymer molecular chains; the titanium dioxide nanoparticles and the crosslinking spheres are connected via covalent bonds. The hollow porous microspheres coated with titanium dioxide nanoparticles and the preparation method thereof have the advantages that the method is simple, the preparation process is reasonable, and the finally obtained hollow porous microspheres have good delustering effect, can effectively shield medium- and long-wave ultraviolet, have high melting temperature and pyrolytic temperature and have great popularization value.