35results about How to "Strong breakdown resistance" patented technology

The invention provides a method for preparing a magnetic powder core, comprising: mixing carbonyl iron powder with a phosphating solution, and performing phosphating treatment to obtain treated iron powder; drying and sieving the treated iron powder and mixing with an insulating coating agent coating to obtain coated powder; the insulating coating agent includes organic resin, inorganic coating material, coupling agent and curing agent; the coated powder is granulated, pressed and solidified to obtain a magnetic powder core. In the present invention, by selecting a specific insulating coating agent and combining other operations, the magnetic powder core achieves the best comprehensive performance, which not only has high saturation magnetic flux density and stable magnetic permeability and other magnetic performance indicators, but also has breakdown resistance. Strong ability; and excellent molding performance, which meets the molding of complex structure of integrated inductor; mechanical properties can also meet industrial requirements. The present invention makes the insulating coating layer of the magnetic powder core more stable through multi-layer coating combination, and can make the working stability of the manufactured product stronger during the service life.

The invention discloses a method for improving the anti-breakdown capability of ferroelectric thin films. In the method, metal aluminum sheets are used as electrodes of ferroelectric thin films, or other materials covered with a layer of aluminum film are used as electrodes of ferroelectric thin films. The electrodes of the electric thin film are pretreated and then the ferroelectric thin film is grown on the pretreated electrode; the electrodes of the ferroelectric thin film are pretreated under gas protection at 300-480°C. The invention first proposes the idea of ​​improving the anti-breakdown ability of the ferroelectric thin film through the selection of electrodes, and provides a feasible electrode. The obtained ferroelectric thin film has strong breakdown resistance, low leakage current, real ferroelectric properties of the thin film can be measured, and has good prospects in the preparation process and device application of the ferroelectric thin film in the future.

The invention relates to a vacuum arc extinguishing chamber ceramic shell component and a process for manufacturing the same, wherein the ceramic shell component comprises a ceramic shell and a shielding barrel; the inner wall of the ceramic shell is provided with a stiffener rib on which the shielding barrel is fixed; the edge of an upper opening of the shielding barrel is tightly pressed on thestiffener rib in a form of flanging structure, and the shape of the outer side surface of the upper opening part of the shielding barrel had better adapt to the stiffener rib. When the invention is manufactured, the shielding barrel is arranged in the ceramic shell, and the height of the edge of the upper opening of the shielding barrel is over the height of the stiffener rib of the ceramic shell; the shielding barrel is moved upward, so that the upper opening part of the shielding barrel correspondingly contact the lower part of the stiffener rib; the upper opening of the shielding barrel isforced to tightly press on the stiffener rib in the form of flanging structure. The ceramic component has the advantages of thoroughly avoiding the problem of the falling off of the shielding barrel,along with simple structure and reliable performance, and thoroughly avoids the problem of the dropout of the shielding barrel, and simple manufacturing process, convenient operation, low production cost, high production efficiency and production qualification rate and no environmental pollution due to the adoption of a tightly clamping and pressing structure instead of a welding structure.

The invention discloses a high-stability high-reliability self-circulating three-winding autotransformer and a manufacturing method thereof. The three-winding autotransformer comprises a framework, windings, a magnetic core, a shielding cover and a packaging material and is characterized in that the framework is an alumina-based porous foamed ceramic framework with the porosity of 20-30%; the windings adopt red copper wires with 1140 epoxy polyester insulating varnish; the magnetic core is a B-shaped silicon steel sheet magnetic core; gaps between the shielding cover and other parts are filledwith self-circulating insulating heat transfer filler, and the self-circulating insulating heat transfer filler is a mixture of alumina-based porous foamed ceramic, non-vulcanized silica gel and gumrosin; the shielding cover is made of aluminum alloy and packaged by a full-closed structure. The autotransformer has the advantages of small loss, high conversion efficiency, good electromagnetic shielding performance, good insulation, high cost performance and long service life.

The invention relates to a cable material filler which is prepared from the following raw materials in parts by weight: 0.5-0.7 part of zinc glycinate, 0.2-0.3 part of folic acid, 0.4-0.5 part of insect wax, 1-2 parts of sodium antimonide, 3-5 parts of magnesium silicate, 1.2-1.5 parts of disodium edetate, 1-1.3 parts of sodium polyacrylate, 1.4-1.6 parts of polyamide modified alkyd resin, 2-4 parts of diisononyl phthalate, 0.2-0.3 part of zinc soap, 2-3 parts of active nano calcium carbonate, 75-80 parts of medical stone powder, a right amount of water, a right amount of 4-6% hydrochloric acid and 10-15 parts of assistant. The filler has the advantages of favorable hydrophobicity, favorable compatibility with the cable material and high breakdown resistance, and can endow the cable with favorable light fastness, heat resistance, aging resistance and electrical insulation properties; and the filler has favorable water resistance, favorable extraction resistance and low toxicity, can be widely used in the cable material, and can lower the cost, thereby obtaining higher economic benefit.

The invention provides a fabrication method of a thin film transistor, an array substrate and a liquid crystal display panel. The fabrication method of the thin film transistor comprises the followingsteps of forming a Beta-type polyvinylidene fluoride first insulation layer on a gate layer; forming a InGaZnO semiconductor layer on the Beta-type polyvinylidene fluoride first insulation layer; forming a source and a drain on the InGaZnO semiconductor layer; and forming an insulation protection layer on the source and the drain. By the fabrication method, the device reliability can be improved.

The invention relates to a T-shaped coaxial power divider. The T-shaped coaxial power divider comprises a first section of inner conductor I, a third section of inner conductor I and a second sectionof inner conductor I, wherein the first section of inner conductor I and the second section inner conductor I are fixedly connected, the second section of inner conductor I and the third section of inner conductor I are fixedly connected, a second section of inner conductor II and a third section of inner conductor II sleeve the periphery of the first section of inner conductor I, are coaxial to each other and both are in cylindrical shapes, the second section of inner conductor II is arranged between the second section of inner conductor I and the third section of inner conductor II, an end part, far away from the second section of inner conductor I, of the second section of inner conductor II is fixedly connected with one end part of the third section of inner conductor II, a gap is formed between the second section of inner conductor II and the second section of inner conductor I, and the inner diameter of the third section of inner conductor II is smaller than the inner diameter ofthe second section of inner conductor II. The coaxial power divider is resistant to high pressure and is high in breakdown-resistant capability, port impedance matching is easy, the coaxial power divider can be directly connected with a high-power device, and the application requirement of a high-power circuit is met.

The invention discloses a surface-discharge ceramic substrate applied to an optical pumping source. The surface-discharge ceramic substrate comprises a ceramic body and a diamond ablation-resistant coating deposited on the ceramic body, wherein the diamond ablation-resistant coating is deposited in only a region where surface discharge is generated on the surface of the ceramic body. The manufacturing method of the surface-discharge ceramic substrate comprises the following steps: preparing turbid liquid containing diamond powder; pretreating the ceramic body by using a hydrofluoric acid solution and then planting seed crystals for the ceramic body by using the turbid liquid; shielding the region, where no surface discharge is generated, of the ceramic body; depositing the diamond ablation-resistant coating on the surface of the ceramic body by means of hot filament chemical vapor deposition to obtain the surface-discharge ceramic substrate. The surface-discharge ceramic substrate disclosed by the invention is good in plasma ablation resistance, high in reutilization frequency and low in cost.