35results about How to "Excellent long life" patented technology

An electrophotographic photoreceptor includes, a cylindrical photoreceptor pipe; at least one flange which is attached to an opening of one end of the photoreceptor pipe, and which is provided with a shaft part projecting outward from the one end at a shaft center position of the photoreceptor pipe; and an earth member which is arranged to penetrate through the shaft part of the at least one flange, and which is provided on its inward side with at least one first contact part which contacts an inner circumference of the photoreceptor pipe, and on its outward side with a second contact part.

The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present disclosure is contained in an electron transport layer and / or an electron buffer layer, so that an organic electroluminescent device having improved light-emitting efficiency can be manufactured.

The invention provides a regenerative thermoplastic resin composition which has an excellent balance between rigidity and strike-proof despite exiting a mass of regenerative resin and has the same creep-resistant performance to unused polyolefin resin, and a molding body as the filling member of rainwater depositing and / or infiltration establishment. The regenerative thermoplastic resin composition is characterized in that a regenerative polyolefins resin composition contains 10 to 90 wt. % high molecular weight polyolefins resin which average molecular weight is no less than 500,000 and 90 to 10 wt. % regenerative polyolefins resin, based on 100 parts by weight of the regenerative polyolefins resin, a reactive resin component containing 1 to 30 parts low density polythene and / or organic peroxide, free radicals capture agent and methylether acrylate monomer.

An LED dot matrix display and a combined dot matrix display. The dot matrix display comprises a heat dissipation submount (1), a PCB (2), LED light emitting units that are arranged uniformly, an imaging controller, a layout circuit conductive layer, and a plastic board (4). The LED light emitting units each comprise more than one LED chip (5), a wire used for electrically connecting the LED chips (5) and the layout circuit conductive layer, and a transmissive package colloid (3) used for packaging the LED chips (5). An external sidewall (13) of a closed chamber (24) for sealing the plastic board (4) and the heat dissipation submount (1) is arranged between the plastic board (4) and the heat dissipation submount (1), the plastic board (4) being used for forming the transmissive package colloid (3) that packages the LED chips. The heat dissipation submount (1), the external sidewall (13) of the closed chamber (24) and the plastic board (4) form the closed chamber, and the PCB board (2) is accommodated in the closed chamber (24). The heat dissipation submount (1), the plastic board (4), and the transmissive package colloid (3) are in direct contact with the external air. The dot matrix display constituted in this way has a simple structure, a low cost, and desirable water-proof and heat-dissipation effects.

The invention provides a Ni-Cr-Mo-W-Nb-Al-Ti system high temperature alloy material. The high temperature alloy material comprises the following chemical ingredients by weight: less than or equal to 0.08% of C, 14.0-16.0% of Cr, 2.75-3.25% of Mo, 2.75-3.25% of W, 2.75-3.25% of Nb and Ta, 0.3-0.6% of Al, 0.4-0.7% of Ti, 5.0-9.0% of Fe, 0.01-0.05% of Zr, 0.003-0.008% of B, 0.01-0.05% of Mg, less than or equal to 0.75% of Mn, less than or equal to 0.01% of P, less than or equal to 0.04% of Si, less than or equal to 0.01% of S, and the balance of Ni and inevitable impurity elements. The invention further provides a preparation method of the material and application to a power device. The obtained alloy has the advantages of high high-temperature tensile strength, high oxidation resistance and long service life.

The invention discloses an LED (light-emitting diode) dot matrix display screen which comprises a heat-dissipating substrate, LED light-emitting units, an imaging controller and a layout circuit conducting layer, wherein the LED light-emitting units are uniformly arrayed; each LED light-emitting unit is separately electrically connected with the imaging controller through the layout circuit conducting layer; the LED light-emitting units are fixed on the heat-dissipating substrate; the central position of every four adjacent LED light-emitting units is provided with a straight heat-dissipating through hole, each LED light-emitting unit is adjacent to the straight heat-dissipating through hole, and the straight heat-dissipating through hole passes through the heat-dissipating substrate; the LED dot matrix display screen also comprises a display-screen outline border, and the display-screen outline border is provided with an accommodating cavity (the bottom surface thereof is provided with an opening); and a position (facing to each LED light-emitting unit) on the front surface of the display-screen outline border is provided with a through hole for covering the LED light-emitting unit, the through hole is provided with a light-pervious seal plate, a position (close to the upside of the display-screen outline border) on the back face of the display-screen outline border is provided with heat-dissipating holes, and the back face of the display-screen outline border is also convexly provided with a rain cover for preventing rainwater from entering the accommodating cavity. The LED dot matrix display screen has the advantages of good heat dissipation and waterproof properties.

The invention discloses a cobalt-free anti-CO 2 The poisoned high oxygen permeability double-phase oxygen-permeable membrane material, its preparation method and application belong to the technical field of functional ceramic preparation. The chemical formula of the dual-phase oxygen permeable membrane material is Sm x Sr 1‑x Cu y Fe 1‑y O 3‑δ ‑z wt% Ce 0.8 Sm 0.2 O 2‑δ , where 0≤x≤0.5, 0.1≤y≤0.3, 50≤z≤70. When preparing the biphasic film, the sol-gel method is used to prepare the two-phase material powders, which are mechanically mixed according to the mass ratio of the two phases in the chemical formula, and pressed under pressure to form a wafer green body. Heat preservation to obtain a dense two-phase oxygen-permeable membrane. The dual-phase oxygen-permeable membrane of the invention has compact structure, high mechanical strength, good compatibility between two phases, and no impurity-phase generation; 2 Excellent poisoning performance, able to contain CO 2 It can run stably for a long time in the atmosphere; it has a very considerable oxygen permeability, and the preparation method is simple and low in cost.