92results about How to "Improve flicker performance" patented technology

The invention relates to an aesthetic resin for improving white blink effect and a preparation method thereof. The aesthetic resin comprises 100 weight portions of resin matrix, 0.1-5.0 weight portions of white pigment, 0.1-2.0 weight portions of pearlescent pigment, 0-0.5 weight portions of cross-linked polymer, 0.1-3.0 weight portions of lubricant, 0.1-1.0 weight portions of anti-oxidant, and 0.001-0.15 weight portions of fluorescent brightener. The preparation method comprises the following steps: stirring and mixing the raw materials in a high speed mixer, then putting the mixed raw materials in a double screw extruder, under the conveying, shearing and mixing of the screws, melting and compounding the materials, then carrying out extrusion, pulling, cooling, and dicing on the materials to obtain the product. Compared with the prior art, the disadvantages of poor blink effect of present white aesthetic resin under the conditions of high whiteness and high-cover ratio are overcome, thus the apparent effect of the white aesthetic resin is greatly enhanced, the feasibility of a white blink free-spraying scheme is increased, and the market potential in the fields of automobile, household appliance, consumer electronics and the like is raised.

The invention relates to an aesthetical resin capable of eliminating injection-molding weld lines and a preparation method thereof. The aesthetical resin comprises the following components in part by weight: 100 parts of thermoplastic resin, 0 to 5 parts of powdered aluminium, 0 to 5 parts of diamantes, 0.1 to 1 parts of antioxidant, 0.1 to 1 parts of dispersing agent and 0.1 to 5 parts of pigment; after the materials are prepared according to the components and the parts by weight, the materials are put into a medium-speed mixer, the rotating speed and the time are controlled, mixed material is obtained, and finally, a double-screw extruder is used to extrude and granulate the mixed material, so that the product is obtained. Compared with the prior art, the invention has the advantages of high surface glossiness, good mirror effect, bright color, good flowability, simple and continuous flow, high production efficiency and stable product quality, meets SGS and ROHS heavy metal safety standards and can be recycled.

The invention relates to a method for manufacturing a novel ball aluminum pigment, which adopts a formula comprising the following raw materials: atomized ball aluminum powder, organic matters, aerosol and a ball milling medium. The method comprises the following steps: (1) mixing the atomized ball aluminum powder, the organic matters and the aerosol in a certain proportion and then putting the mixed raw materials in a vertical ball mill for milling by using glass balls with a diameter of 0.5-1 mm as the milling medium; (2) carrying out sieving and filter pressing to manufacture raw materials into an aluminum paste filter cake; and (3) adding the aluminum paste filter cake to a proper organic matter to knead so as to manufacture a finished ball aluminum pigment product.

The invention provides a scintillation crystal magnesium tantalum oxide. The chemical formula of the crystal is Mg4Ta2O9, the crystal belongs to a hexagonal crystal system and has an ilmenite structure, the scintillation light yield is 16000 photons/M eV, the decay time is 5 [mu]s, and the energy resolution is 6.2%. The invention also provides a use of the Mg4Ta2O9 as a scintillation crystal material, and a preparation method of the Mg4Ta2O9. The preparation method comprises the following steps: MgO and Ta2O5 which are used as initial powders are uniformly mixed according to a molar ratio of 4.04:1, and are processed to form a raw material rod, the raw material rod is pre-sintered to obtain a pure-phase, dense and uniform polycrystalline rod, and the colorless and transparent rod-shaped crystal having a size of phi 4 mm * L 62 mm grows by adopting an optical floating zone technology. The method has the advantages of stable melting zone, simplicity in operation, effectiveness in inhibition of the volatilization of MgO, and maintenance of uniform composition and stable crystal quality.

The invention discloses a bismuth silicate-germanate mixed crystal and a preparation method thereof, belonging to the single crystal field. The molecular formula of the bismuth silicate-germanate mixed crystal is Bi4Si3-xGexO12. The preparation method comprises the following steps: using high-purity Bi2O3, SiO2 and GeO2 as raw materials to fully grind, presinter and obtain a polycrystalline material; and placing seed crystal at the bottom of a crucible in advance, placing the synthesized polycrystalline material in the crucible, and transferring the crucible to a crystal growing furnace while controlling the temperature to 1050-1150 DEG C, the temperature gradient of the solid-liquid interface to 20-50 DEG C/cm and the growth velocity to 0.2-0.5mm/h. The raw material components of the bismuth silicate-germanate mixed crystal provided by the invention are adjustable and are distributed evenly; the mixed crystal has the scintillation property of bismuth silicate and the scintillation property of bismuth germanate, the mixed crystal has large size; the preparation method adopts stable temperature field and simple processing equipment; and multicrystal can grow at the same time, the growth efficiency of the mixed crystal is high, the production cost is low and the mixed crystal is suitable for industrial production.

The invention discloses a method for preparing a transparent Gd2(1-x-y)Lu2xEu2yO3 ceramic scintillator. Gd2(1-x-y)Lu2xEu2yO3 ceramic powder is prepared by a combustion method which uses glycine as a combustion agent, the dry powder compression is adopted, then the pressureless sintering is performed in vacuum or reducing atmosphere, the sintering temperature is between 1,600 and 1,900 DEG C, and the transparent Gd2(1-x-y)Lu2xEu2yO3 ceramic scintillator can be obtained. The ceramic scintillator emits red light under the excitation of ultraviolet light or X rays, and can be used for scintillating materials of imaging and detection of medical and industrial X rays.

The invention discloses a cerium-doped gadolinium disilicate luminescent material and a preparation method thereof. The chemical formula of the material is (Gd[1-x-y-z]KxCeyMz)2Si2O7, wherein K is one or combination of more of La, Lu, Y and Sc; M is one or combination of more of Mg<2+>, Ca<2+>, Ba<2+>, B<3+> and In<3+>; and 0<=x<=0.995, 0.00001<=y<=0.05, and 0<=z<=0.05. The main group ions Mg<2+>, Ca<2+>, Ba<2+>, B<3+> and In<3+> are additionally added into the luminescent material cerium-doped gadolinium disilicate to prepare the cerium-doped gadolinium disilicate scintillator monocrystals and fluorescent powder. Compared with the gadolinium disilicate luminescent material without doped main group ions, the phosphor-decay time of the main-group-ion-doped cerium-doped gadolinium disilicate scintillator monocrystals and fluorescent powder is obviously shortened, and the scintillation properties of the cerium-doped gadolinium disilicate scintillator monocrystals and fluorescent powder are optimized.

The key of a preparation method for metasilicate scintillation crystals doped with 3-valence Ce ions is that its growing formula is doped with 3-valence Ce compounds which can be any one of the followings : Ce(OH)3, Ce2 ( C2 O4)3, Ce (CH3 Co6)3 and Ce2 (CO3)3. The raw material is sintered and grown in the neutral atmosphere and the crystals can reduce the quenching to Ce3+ illumination and increase its scintillation performance for about 5%-10%.

The invention discloses a method for converting visually yellow cerium doped lutetium yttrium oxyorthosilicate crystals into colorless cerium doped lutetium yttrium oxyorthosilicate crystals in neutral atmosphere. The visually yellow cerium doped lutetium yttrium oxyorthosilicate crystals are heated in neutral atmosphere for a certain period of time to ensure that oxygen is diffused from the cerium doped lutetium yttrium oxyorthosilicate crystals, so Ce<4+> is changed into Ce<3+>, and the crystals become colorless. According to the method, the crystals are treated at high temperature in neutral atmosphere, so residual oxygen is removed from the crystals, and the visually yellow cerium doped lutetium yttrium oxyorthosilicate crystals are converted into colorless yellow cerium doped lutetium yttrium oxyorthosilicate crystals; therefore, transmissivity of the 420-nm part of the crystals is improved. The scintillation property of the crystals can be improved obviously. By the method, primary crystals are subjected to reduction heat treatment, so the properties of the crystals can be improved, and the properties of the crystal products which are not appropriately oxidized can be recovered. The properties of the crystals are greatly improved, and the utilization rate of the crystals is further improved.

The application discloses yttrium lithium fluoride-doped scintillating microcrystal and a preparation method thereof. The yttrium lithium fluoride-doped scintillating microcrystal has a chemical formula shown as formula I: LiM10.02M2xY0.98-xF4, wherein M1 and M2 are selected from rare-earth elements, and 0.01<x<0.06. The yttrium lithium fluoride-doped scintillating microcrystal is 8-15 mu m in size that is of micrometer level, has good transparency and good size uniformity, has good scintillating property, has the potential of large-scale production, and has the potential application value inthe field of high-energy ray detection.

The invention belongs to the technical field of radiation detection, and discloses a halogenated perovskite quantum dot composite material for neutron detection and a preparation method thereof. The composite material is prepared from an organic polymer or inorganic glass matrix composite perovskite halide quantum dot material with high neutron interception capability. The matrix with high neutron interception capability can intercept incident neutrons and convert the neutrons into secondary charged particles so as to excite the doped halogenated perovskite quantum dots to flicker and emit light. Compared with a traditional neutron detection material, the composite material has the advantages of being low in cost, capable of preparing large-size samples, excellent in scintillation performance and the like, and the prepared composite material can be applied to the fields of neutron safety detection, oil well exploration, neutron treatment, high-energy physical experiments and the like.

The invention discloses solvent-based colored paint with a high flickering degree effect. The solvent-based colored paint is prepared from the following components in parts by weight: 4 to 16 parts offirst amino resin, 23 to 37 parts of first acrylic resin, 0.01 to 10 parts of pigment filler, 3 to 6 parts of microgel, 1 to 4 parts of a first anti-settling agent, 0.02 to 1.2 parts of a first stabilizer, 0.01 to 1 part of an auxiliary, 0.01 to 1 part of a dispersant, 0.1 to 5 parts of a resistance regulation auxiliary, 12 to 25 parts of semi-finished resin and 6 to 52 parts of a first solvent.According to the solvent-based colored paint with the high flickering degree effect, glass powder serving as the pigment filler is added into coating, and can be suitable for both solvent-based coating and water-based coating, so that a paint film with high flickering effect is finally obtained. The coating prepared with the preparation method is high in performance, high in storage stability, high in product quality stability and low in cost, and is suitable for low, middle and high-grade vehicle models in the market.

The invention discloses a chemical constitution of a glass film containing rare earth ion-doped Cs2LiYCl6 microcrystalline and a sol-gel preparation method of the glass film. The glass film is characterized by comprising the following components by mol percent: 71mol%-75mol% of germanium dioxide, 5mol%-10mol% of aluminum sesquioxide, 5mol%-10mol% of phosphorus pentoxide, 8mol%-12mol% of Cs2LiYCl6 and 1mol%-3mol% of rare-earth chloride, wherein rare-earth chloride is one of cerium chloride, europium chloride or terbium chloride. The sol-gel preparation method has the advantages that sol-gel is a low-temperature wet chemical method glass preparation technique, and glass is prepared by virtue of hydrolysis and chemical polymerization reaction of precursor raw materials, and a film material can be prepared under certain liquid viscosity; by virtue of low temperature synthesis conditions, the decomposition and the volatilization of the chloride raw material can be effectively prevented.

The invention relates to a light supplement method and device, and an electronic device. The method comprises the steps of: when a shooting request is received, controlling a first constant current receiving source to increase the current in a first group of backlight lamps so as to enable the first group of backlight lamps to maintain a first flash brightness for a first set time length; when the first time length ends, starting a shutter of a camera; and controlling a second constant current receiving source to increase the current in a second group of backlight lamps so as to enable the second group of backlight lamps to maintain a second flash brightness for a second set time length. According to the technical scheme, the first group of backlight lamps and the second group of backlight lamps are respectively driven in a time sharing mode, the instant flashing capability of the LED backlight lamps is improved, the camera is enabled to have a large field depth effect under a dark environment, and the shooting experience of the user is effectively is improved.

The invention belongs to the technical field of scintillating materials, and particularly discloses a rare earth silicate double salt scintillating material and a preparation method thereof. The chemical constitution formula of the rare earth silicate double salt scintillating material is M<3>RE<1-x>Ce<x>Si<3>O<9>, wherein x is a molar ratio of RE replaced by Ce, and x is greater than 0 and less than or equal to 0.3; M is selected from one or more of Li, Na, K, Rb and Cs; RE is selected from one or more of La, Gd, Y and Lu. The scintillating material can emit strong fluorescence when being excited by X-ray; the luminescence wavelength is 320-580 nm; the fluorescence lifetime when the scintillating material is excited by ultraviolet is about 30 ns; the rare earth silicate double salt scintillating material can stably exist in the air, is excellent in physical and chemical stability and scintillation property, and has the practical application value.

The invention discloses glass containing rare earth ion doped lutetium iodide micro-crystals and a preparation method of a glass film. The glass is characterized by being prepared from the following raw materials by mole percent: 73-75mol% of ethyl orthosilicate, 5-16mol% of niobium ethoxide, 10-15mol% of lutetium iodide and 1-5mol% of rare earth iodide, wherein rare earth iodide is one of cerium iodide, europium iodide and terbium iodide. The glass has the advantages as follows: a sol-gel method is a low-temperature wet-chemical method glass preparation technology, and the glass is obtained through hydrolysis and polymerization chemical reaction of precursor raw materials, so that the glass can be prepared into a film material at a certain liquid viscosity and iodide raw materials are prevented from being decomposed and volatilized through low-temperature synthesis conditions; the glass prepared through the sol-gel method can generate a certain micropores in the material due to volatilization and decomposition of the solvent, and the micropores provide the good environment for generation of nano iodide micro-crystals, so that defects that crystallization particles are nonuniform and glass devitrification occurs due to incomplete uniformity of glass smelting chemical constituents and crystallization processing temperature can be overcome to a certain extent.