38results about How to "Low surface roughness" patented technology

The invention discloses a composite ceramic membrane for lithium ion batteries and a preparation method thereof, including a ceramic coating modification method and a ceramic lithium battery membrane. The ceramic protective layer is mainly prepared from a ceramic-adhesive mixture subjected to graft modification by a sodium-sulfonate / sodium-carboxylate-group-containing anionic surfactant. The grafting is completed by using a grafting-on process under the action of a coupling agent; the grafting ratio of the ceramic is higher; the high-temperature-resistant large-surface-area nano ceramic is introduced to the conventional PP (polypropylene) membrane surface, the insulativity and electrolyte wettability of the modified ceramic membrane are greatly enhanced; and the membrane has excellent high-temperature heat stability especially at the high temperature of 130 DEG C, 150 DEG C and 180 DEG C. The lithium battery composite membrane avoids the thermal shrinkage of the convention membrane, thereby avoids the thermorunaway in the battery due to thermal shrinkage, and further enhancing the safe reliability of the lithium ion battery.

The invention discloses a large-area TiB-TiC reinforced titanium-based composite coating prepared from the following components in percentage by weight: 83-88 percent of Ti, 5-7 percent of B4C, 2-4 percent of Al, 1-3 percent of nano TiC and 3-5 percent of rare-earth oxide. The invention adopts a new method for preparing a pre-coating layer which has the advantages of smooth surface, controllable thickness, less adhesive and relatively simple process. In addition, the invention optimally selects the proportioning of a cladding material system so that the coating after cladding has reinforcing phases of TiB and TiC; in addition, since a base body and a base body material Ti6Al4V are both titanium alloy, the coating and the base body have favorable physical compatibility. The invention also remarkably lowers the intensity degree of reaction for generating TiB and TiC by adding a little amount of thinner nanoTiC.

An image forming apparatus includes an image bearing member for carrying an electrostatic image; a developing device for developing the electrostatic image with a plurality of toners having the same hue and having different densities; a toner image formation device for forming on a recording material a toner image constituted by the toner having the same hue and different densities; and a fixing device for fixing the toner image on the recording material, wherein a total of amounts per unit area of the toners which have the same hue and different densities and which constitute a part of the toner image, is substantially the same as a total of amounts per unit area of the toners which have the same hue and different densities and which constitute another part of the toner image having a different density.

The invention provides a preparation method of a flexible substrate-GO-metal nanowire composite transparent conductive thin film. The preparation method comprises the steps of quartz glass substrate surface processing, metal nanowire solution preparation, vacuum filtering metal nanowire film, lamination, filtering film removal, GO processing, flexible substrate material solution preparation, flexible substrate film formation and quartz glass substrate stripping. The invention also provides the flexible substrate-GO-metal nanowire composite transparent conductive thin film prepared by the method. The composite transparent conductive thin film prepared by the method has the advantages of low surface peak valley roughness and surface average roughness, good conductivity, high optical transmittance, good mechanical flexibility and good thermal stability, the metal nanowire is firmly attached onto the flexible substrate, the application demand of a device can be achieved, particularly, therequirement of a flexible thin film electronic device on electrode surface roughness can be met, and the reliability and the stability of the metal nanowire electrode in application of the thin film electronic device are improved.

A photoelectric conversion device according to an embodiment of the present disclosure includes: a first electrode and a second electrode facing each other; and a photoelectric conversion layer provided between the first electrode and the second electrode, and including a first organic semiconductor having head (Head)-to-tail (Tail) coupling regioregularity of 95% or more represented by a formula (1) and a second organic semiconductor having head-to-tail coupling regioregularity of 75% or more but less than 95% represented by the formula (1),

The invention discloses a flexible printed circuit board and a manufacturing method thereof. A routing part of a conductive layer comprises a plurality of conductive traces which are arranged at intervals; and a non-routing part is formed by intercrossing conductive wires which are arranged at intervals. The non-routing part is designed to be formed by intercrossing the conductive wires which are arranged at intervals, so that the phenomenon that a region, which is used for holding the non-routing part, of a base material layer is completely covered by the non-routing part is avoided. In a subsequent manufacturing technology, when the flexible printed circuit board is baked or passes through a furnace after being erected with other components and is then deformed, stress produced in the flexible printed circuit board is uniformly distributed, and parts of the flexible printed circuit board are deformed consistently; and the reduction of the surface flatness of the flexible printed circuit board is avoided.

The invention relates to the test of acoustic performance of polyethylene test samples and provides a method and a device for testing acoustic performance of an ultrathin polyethylene test sample. An impulse reflection device based on immersion focusing technology comprises an ultrasonic detector, a test container, a clamping device and a focusing probe. The method for testing acoustic performance of ultrathin polyethylene test sample comprises the following steps: preparing an ultrathin polyethylene test sample to be tested; immersing the ultrathin polyethylene test sample in coupling liquid, and blending the coupling liquid until the ultrasonic detector receives no echo signal; calculating the sound velocity and acoustic impedance of the coupling liquid, wherein the acoustic impedance of the coupling liquid is the acoustic impedance of the ultrathin polyethylene test sample; and calculating the sound velocity of the ultrathin polyethylene test sample. The contact interface coupling problem of ultrasonic and test sample does not need to be considered in the method disclosed by the invention, so that the method is suitable for measuring the acoustic impedance of ultrathin test samples with irregular surfaces, and the precision of the test result is high.

The invention discloses a method for lowering the defective rate of woven fabric and a loom. According to the method, an infrared probe is used for scanning, a motor is controlled by a controller to stop suddenly, secondary tensioning is conducted on yarn through a tensioning wheel and a tensioning roller, and woven fabric is heated through a heating roller so that wrinkles can be eliminated. The loom manufactured through the method comprises a machine frame (1), wherein a yarn wheel (2) and the tensioning wheel (3) are arranged on the machine frame (1), a distributor plate (4) and a working table (5) are arranged below the tensioning wheel (3), knitting needles (6) and the tensioning roller (7) are arranged at one end of the working table (5), a limiting roller (8), the heating roller (9) and a guiding roller (10) are arranged at the other end of the working table (5), a sliding rail (11) is arranged above the working table (5), and the infrared probe (14) is connected to the sliding rail (11) through a sliding block (12) and a suspension frame (13). The method for lowering the defective rate of woven fabric and the loom can improve the quality of products and lower the defective rate and further have the advantages that the production efficiency is high and the surface smoothness is good.

The invention discloses a composite diaphragm for a lithium ion battery and a preparation method thereof, including a ceramic coating modification method and a ceramic lithium battery diaphragm. The ceramic protective layer is mainly a mixture of ceramics and binders which are grafted and modified by anionic surfactants containing sodium sulfonate or sodium carboxylate groups. Grafting is completed under the action of dehydrating agent and using the "grafting to" method. The grafting rate of ceramics is relatively high. The modified ceramic diaphragm introduces high-temperature-resistant high-specific-surface-area nano-ceramics on the surface of conventional PP diaphragms, which greatly improves the It improves the insulation of the diaphragm and the wettability of the electrolyte, especially at high temperatures of 130°C, 150°C and 180°C, it exhibits excellent high-temperature thermal stability. The lithium battery composite diaphragm avoids the heat shrinkage of conventional diaphragms, thereby avoiding thermal runaway inside the battery caused by heat shrinkage, thereby improving the safety and reliability of the lithium ion battery.

A magnetic recording medium having a non-magnetic support, at least one primer layer on one surface of the support, a magnetic layer on the primer layer and a back coat layer on the other surface of the non-magnetic support, in which the support has a thickness of 2 to 5 μm, the surface roughness (Ra) of the support on its surface carrying the primer layer and the magnetic layer is from 2.5 nm to 20 nm, the thickness of the primer layer is 1.5 μm or less, and the primer layer contains 2 to 30% by weight, based on the weight of all inorganic powder in the primer layer, of alumina powder having a particle size of 0.01 μm to 0.1 μm.

The invention discloses a method for lowering the defective rate of woven fabric and a loom. According to the method, an infrared probe is used for scanning, a motor is controlled by a controller to stop suddenly, secondary tensioning is conducted on yarn through a tensioning wheel and a tensioning roller, and woven fabric is heated through a heating roller so that wrinkles can be eliminated. The loom manufactured through the method comprises a machine frame (1), wherein a yarn wheel (2) and the tensioning wheel (3) are arranged on the machine frame (1), a distributor plate (4) and a working table (5) are arranged below the tensioning wheel (3), knitting needles (6) and the tensioning roller (7) are arranged at one end of the working table (5), a limiting roller (8), the heating roller (9) and a guiding roller (10) are arranged at the other end of the working table (5), a sliding rail (11) is arranged above the working table (5), and the infrared probe (14) is connected to the sliding rail (11) through a sliding block (12) and a suspension frame (13). The method for lowering the defective rate of woven fabric and the loom can improve the quality of products and lower the defective rate and further have the advantages that the production efficiency is high and the surface smoothness is good.

The disclosure discloses an epitaxial wafer of a light-emitting diode and a manufacturing method thereof, belonging to the field of optoelectronic technology. The manufacturing method includes: providing a substrate; sequentially growing a buffer layer, an n-type AlGaN layer, an active layer, and a p-type barrier layer on the substrate; alternately using trimethylgallium and triethylgallium as a gallium source, and at p A p-type GaN layer is grown on the barrier layer. When trimethylgallium is used as a gallium source for growth, the grown surface has low flatness, which is conducive to roughening the surface, which can reduce the total reflection of light and improve light scattering. When triethylgallium is used as a gallium source for growth, The film formed by growth has high crystal quality, which is beneficial to Mg doping, can increase the concentration of holes, and is beneficial to improving luminous efficiency. By reducing the total reflection of light, increasing the scattering of light and increasing the concentration of holes, the light extraction efficiency of the deep ultraviolet light-emitting diode is increased as a whole.

A surface flatness measuring device and a surface flatness measuring method are disclosed. By non-contacting laser measurement, measurement precision can reach 0.001 mm so the measurement precision is high. A repetitive measurement error thereof can be controlled to be within 3 um so the measurement error is tiny, which prevent issues of low measurement precision and great measurement errors due to manual measurement in prior art. At the same time, the present invention measurement data can be automatically recorded and saved, measurement for a large batch of boards under measurement can be implemented, which prevents the issues of the conventional measurement data requiring manual recording and lacking capability of uploading the measurement data.

The invention provides a preparation method of a flexible substrate-GO-metal nanowire composite transparent conductive thin film. The preparation method comprises the steps of quartz glass substrate surface processing, metal nanowire solution preparation, vacuum filtering metal nanowire film, lamination, filtering film removal, GO processing, flexible substrate material solution preparation, flexible substrate film formation and quartz glass substrate stripping. The invention also provides the flexible substrate-GO-metal nanowire composite transparent conductive thin film prepared by the method. The composite transparent conductive thin film prepared by the method has the advantages of low surface peak valley roughness and surface average roughness, good conductivity, high optical transmittance, good mechanical flexibility and good thermal stability, the metal nanowire is firmly attached onto the flexible substrate, the application demand of a device can be achieved, particularly, therequirement of a flexible thin film electronic device on electrode surface roughness can be met, and the reliability and the stability of the metal nanowire electrode in application of the thin film electronic device are improved.

The invention relates to a diamond abrasive tool head and a preparation method thereof, belonging to the technical field of diamond tools. The horizontal projection of the diamond abrasive cutter head of the present invention is an arc shape surrounded by concentric outer arc edges, inner arc edges, and two sides connecting said outer arc edges and inner arc edges, And the two sides are parallel to each other; the central angle of the outer arc edge and the inner arc edge is ≤20°, and the abrasive tool head is made of metal bond containing tungsten carbide, diamond particles, graphite particles and metal halide additives The mixed powder is formed by cold pressing and sintering. The diamond grinding tool head of the present invention not only has good sharpness and good stability under the condition of high-speed rotary grinding, but also can significantly improve the quality of grinding, and is beneficial to reduce surface roughness and surface flatness.