12results about How to "Increase scattering" patented technology

The invention relates to the photovoltaic field, and provides a back contact battery and a manufacturing method thereof, a laminated battery and a photovoltaic module, and the back contact battery comprises a battery substrate which is provided with a first surface and a second surface which are opposite to each other; the isolating membrane is positioned on the first surface; the isolating membrane comprises at least two isolating units, the surface, far away from the first surface, of each isolating unit comprises a first area and a second area surrounding the first area, each isolating unit comprises a first part located in the first area and a second part located in the second area, the first part is provided with a groove sunken towards the battery substrate, and the edge, far away from the first part, of the second part is fluctuant; and an electrode on the second surface. The invention is at least beneficial to improving the light absorption and utilization rate of the back contact cell by means of the isolating membrane.

The application discloses a SnTe-based thermoelectric material and a preparation method thereof, and belongs to the technical field of thermoelectricity. The application adopts high-purity metal elements as raw materials, and the raw materials are mixed according to a stoichiometric ratio, and then a cast ingot is obtained through a melting reaction after vacuum packaging. Subsequently, the cast ingot is subjected to high-temperature annealing treatment. After the cast ingot subjected to the high-temperature annealing treatment is ground into powder, a dense block-shaped SnTe-based thermoelectric material is formed through discharge plasma sintering. The chemical formula of the SnTe-based thermoelectric material is Sn 2.9‑X W X Te 2.9 -(In2Te3) 0.03 -(Cu2Te) 0.18 The application significantly improves the thermoelectric figure of merit of the SnTe-based thermoelectric material and improves the thermoelectric performance of the SnTe-based thermoelectric material by doping tungsten elements in the SnTe matrix and compounding the two metal compounds of In2Te3 and Cu2Te.

The invention relates to the technical field of thermoelectric materials, in particular to a high-flexibility silver telluride thermoelectric thin film with a pearl scallop structure and a preparation method and application of the high-flexibility silver telluride thermoelectric thin film. The non-stoichiometric silver telluride thermoelectric film with a pearl scallop structure is rapidly prepared through an intermittent co-sputtering process under the conditions of room temperature and fixed working air pressure; the pearl scallop structure obviously improves the mechanical property and the thermoelectric property of the silver telluride thermoelectric thin film; after the silver telluride thermoelectric thin film is bent and circulated for 5000 times, the surface has no crack, the resistance is only increased by 20%, and excellent flexibility is shown; and meanwhile, the power factor can reach 51.92 mu W m <-1 > K <-2 > under the room temperature condition, and the material has good thermoelectric performance, meets the requirements of flexible wearable thermoelectric devices, and has potential commercial application prospects.

This application relates to the field of textile fabrics, disclosing a three-dimensional anti-permeability fabric and its preparation process. The three-dimensional anti-permeability fabric includes a first woven layer and several second woven layers. The second woven layers are formed by weaving core-spun yarn onto the first woven layer using a weaving process. The edges of the second woven layers are formed by cutting and high-temperature setting of the core-spun yarn to create a three-dimensional plush structure. The core yarn of the core-spun yarn is made by twisting several high-melting-point yarns and at least one glass fiber yarn together, while the covering yarn is a low-melting-point yarn. The three-dimensional anti-permeability fabric obtained by this application, after cutting and high-temperature setting of the core-spun yarn at the edges of the second woven layers, shrinks the core-spun yarn to form a spiral shape, creating a three-dimensional plush structure at the edges of the second woven layer. Under the synergistic support of the core yarn and the shrunk covering yarn, a stable three-dimensional anti-permeability fabric is formed. It is not easily deformed during long-term wear and washing, maintaining good softness, three-dimensionality, and anti-permeability.

The invention belongs to the technical field of food processing, and relates to a melon rind source stabilizer, an extraction method thereof and application of the melon rind source stabilizer in watermelon juice. The extraction method comprises the following steps: S1, preparing watermelon peel pulp: taking inner peels of watermelons, adding water, and crushing into the watermelon peel pulp; step S2, alkaline hydrolysis ester removal: regulating and controlling a water medium microenvironment to enable the pH value of the melon rind pulp to be 10-13, and reacting at room temperature to remove methyl ester groups; then filtering and washing in sequence to obtain watermelon peel residues; and S3, low-temperature high-pressure homogenization and vacuum freeze drying are combined. The watermelon peel source stabilizer is extracted from watermelon inner peel pulp through alkaline hydrolysis ester removal and low-temperature high-pressure homogenization combined with vacuum freeze drying treatment, has a good network framework, and is not prone to molecular chain breakage, charge shielding or dehydration shrinkage in ultrahigh-pressure sterilization, so that the stability of watermelon juice is improved, and the stability of the watermelon juice is improved. Particularly, the double-effect stability of lycopene and juice in the watermelon juice can be regulated and controlled.

The invention discloses a preparation method of a photocatalyst material, and belongs to the technical field of material preparation and pollution treatment. The method comprises the following steps: by taking bismuth citrate as a multifunctional precursor, firstly mixing the bismuth citrate with a titanium source, a manganese source and a cerium source in a solvent for gelation, then carrying out solvothermal reaction to form an intermediate, and finally carrying out programmed temperature control pyrolysis in an inert and oxygen-containing atmosphere. In the pyrolysis process, carbon element doping and manganese and cerium bimetal ion lattice embedding are synchronously realized, and a graded porous folded structure is constructed in situ by utilizing precursor decomposition gas. The method integrally solves the problems of weak visible light response, low mass transfer efficiency and poor stability of a traditional material, and the prepared material shows efficient inhibition and degradation efficiency on mold such as aspergillus flavus under simulated granary low-illumination visible light.

The application discloses a preparation method and application of a PTFE biomimetic membrane based on a photocatalysis-filter coupling mechanism. The method comprises the following steps: firstly, blending polytetrafluoroethylene (PTFE) and a photocatalyst in a solvent; sequentially performing pushing, rolling, longitudinal stretching, transverse-longitudinal stretching and heat treatment operations on the blended slurry; and finally obtaining the PTFE biomimetic membrane with photocatalysis-filter functions. The PTFE biomimetic membrane can be used for air purification, atmospheric dust removal, industrial waste gas filtration and the like. The application adopts a photocatalysis free oxygen negative ion generation mechanism, orderly embeds isotactic photocatalysts and constructs a micro-rough surface to realize air purification efficiency improvement, pollutant screening and anti-pollution performance. In addition, the orderly arranged photocatalysts can greatly improve light scattering, and then improve the photocatalyst efficiency of the material.

This utility model discloses a screen structure and a high-gain white screen, belonging to the field of projection display technology. The screen structure includes two substrate layers, with a barrier layer bonded between the two substrate layers via an adhesive layer. The substrate layers, adhesive layer, and barrier layer have different refractive indices. The high-gain white screen includes a protective layer, a diffusion layer, and the aforementioned screen structure, arranged sequentially from the incident surface to the back surface. By utilizing the difference in refractive indices between the substrate layer, adhesive layer, and barrier layer, an optical effect similar to mother-of-pearl is created, reducing light penetration and enhancing light reflection and scattering. This improves detail rendering, reduces the loss of dark areas, enhances resistance to external light interference, reduces contrast, reduces color saturation distortion, reduces light loss during propagation, improves overall brightness uniformity, ensures full presentation of high-resolution signal details, and is compatible with more projection devices.

This invention proposes a gallium nitride-based semiconductor laser with a gradient peak rate electric field waveguide layer. The fitting curves of the In ion intensity distribution or In atom concentration distribution, the fitting curve of the peak rate electric field distribution, and the fitting curve of the saturated electron drift velocity distribution obtained from SIMS testing of the upper and lower waveguide layers with the gradient peak rate electric field all satisfy any one of the Logistic function, Logistic 5 function, or Nelder function, forming a high electric field barrier. Electrons transporting from the active region to the p-type layer must overcome this barrier height, suppressing electron leakage from the active region to the p-type layer. The low electric field matches the low-velocity transport of holes, avoiding enhanced hole scattering. High injection efficiency allows carriers in the active region to quickly reach the stimulated emission threshold. The saturated electron drift velocity gradually decreases from high to low, and the low saturated electron drift velocity on the active region side avoids punch-through leakage caused by high-speed electrons rushing through the active region.

This invention provides a method for preparing a diamond / neodymium iron boron (NdFeB) composite thin film, relating to the field of thin film materials technology. The method involves chemical vapor deposition (CVD) using a carbon-containing organic gas as a carbon source. Microcrystalline diamond is grown on a single-crystal silicon substrate under high temperature and high pressure conditions in a reducing atmosphere of hydrogen. Subsequently, NdFeB and tantalum targets are sputtered onto the diamond film surface using magnetron sputtering in a high-temperature and inert argon atmosphere, resulting in a final diamond / neodymium iron boron composite thin film. This invention grows a diamond / neodymium iron boron composite thin film combining dielectric and magnetic materials through CVD and magnetron sputtering. Diamond, as a dielectric material, maintains dielectric loss capability in the terahertz band while providing a supporting substrate; the composite thin film exhibits enhanced loss in the terahertz band, effectively solving the problem of narrow absorption frequency bands in existing thin film materials.

This invention proposes a gallium nitride-based semiconductor laser with a graded thermal conductivity waveguide layer. By fitting the In ion intensity distribution or In atom concentration distribution, the transverse phonon velocity distribution, and the thermal conductivity distribution of the graded thermal conductivity upper and lower waveguide layers using SIMS testing, all of these curves satisfy the Stirling function or the LineMod function. The gradient of the transverse TA phonon velocity homogenizes phonon scattering in the lower waveguide layer, reduces thermally induced lattice distortion, avoids optical field mode distortion, and improves the optical field confinement factor. The gradient of the transverse phonon velocity homogenizes the temperature distribution in the upper waveguide layer, changing the thermal stress from concentrated to distributed, reducing phonon transport loss caused by interface scattering. It avoids the "bottleneck effect" of heat flow at the interface between the active region and the lower waveguide layer, further reducing the temperature coefficient of the threshold, accelerating heat flow to the substrate, and preventing thermal runaway caused by increased driving current after exceeding the threshold.

This invention relates to the field of architectural ceramics technology, disclosing a titanium sphene crystal frit, its preparation method, and its application. The raw materials include kaolin, titanium dioxide, quartz, potassium feldspar, calcite, and wollastonite. By pre-firing the titanium sphene crystal frit using this formula, the titanium sphene crystals are pre-dissolved in the glass phase. During the subsequent glaze firing process at 1200℃, the titanium sphene crystals melt again and precipitate a second time, resulting in an opaque glaze layer. This secondary crystallization enhances the chemical stability of the titanium sphene crystal frit during subsequent glaze firing, leading to a more stable increase in the solar reflectance of the fired glaze. This solves the problem of unstable reflectivity in glazes when directly using titanium sphene powder or combining it with titanium dioxide and titanium frit to directly form titanium sphene crystals during glaze firing.