34results about How to "Reduced preparation process" patented technology

The invention discloses a body insulation structure of a dry-type transformer with a three-dimensional rolled iron core. An insulating cylinder is fixed on low-voltage coils or high-voltage coils and is formed by winding insulating thin plates and preimpregnatde insulating material; the insulating cylinder is supported and fixed by more than three stays; and the coils are tightly pressed by more than three packing blocks, evenly distributed on the circumferences of the upper end surface and the lower end surface of each pair of the coils and fixed by compression screws fixed on a clamping piece of the transformer in a pressing manner. The invention solves the technical problem that the complete closed insulating cylinder cannot be sleeved between the high-voltage coils since the iron coreis sealed, reduces the thickness of the insulating cylinder by 70 percent and the cost of the insulating cylinder by 70 percent, not only simplifies the manufacturing process of the insulating cylinder, but also enhances the insulating property, shortens the production cycle, reduces the manufacturing cost, has attractive appearance and changes the distribution of soft / hard lumps on the circumferences at the upper ends and the lower ends of the coils so that the coil stress is uniform and the product stability and the property against impulsive short circuiting are enhanced.

The invention relates to an interference type optical fiber gyro based on principle of MZ interference, wherein the gyroscopic instrument comprises an illuminating source, a beam divider, an optical supervisory instrument, and an optical fiber sensor coil composed of two optical fiber arms of MZ interference, wherein the light from the light source is connected to the starting terminal and ending terminal of the two optical fiber arms on the optical fiber coils after the beam divider. The forward conduction optical path is separate from the intervened optical path, thus no interference is resulted.

The invention relates to a method for connecting AlON ceramics by using AlON powder as a raw material, belonging to the field of transparent ceramic material preparation. A method for connecting AlON ceramics using AlON powder as a raw material. The mixed powder of the intermediate layer is evenly arranged between the AlON ceramic blocks and then sintered to realize the connection between the AlON ceramic blocks. The mixed powder is made of AlON powder Composed of sintering aid powder, the sintering conditions are: under the unidirectional pressure of 0.01MPa perpendicular to the plane to be connected, the temperature is raised to the holding temperature at a heating rate of 30°C / min, and then the holding temperature is the temperature for preparing the to-be-connected The sintering temperature of the AlON ceramic block is ±30° C., and the holding time is not longer than the sintering holding time for preparing the AlON ceramic block to be connected. The connecting piece obtained by using the method of the invention has high strength and light transmittance. The method is simple to operate and easy to realize industrial scale-up production.

The invention discloses a maskless preparation method of a multi-layer thin-film capacitor. According to the method, firstly, nano metal powder slurry is prepared or non-metallic conductive oxide colloid is prepared by a sol-gel method; a substrate is evenly coated with the nano metal powder slurry or the non-metallic conductive oxide colloid; directional scanning and heating are carried out on the substrate through an infrared spot with controlled temperature, so that the slurry or the colloid is subjected to directional shrinkage in the drying and volatilizing processes and forms an initial electrode pattern; the surface of a metal electrode material is bonded or the non-metallic conductive oxide is crystallized by laser spot heating and a clear electrode pattern is formed; finally a dielectric film is prepared by the sol-gel method or a sputtering method; an electrode film is prepared on the dielectric film according to the method; a staggered layer is formed by the second layer of electrode and the bottom electrode by directional scanning and heating; and the steps are repeated to prepare the multi-layer thin-film capacitor with an interdigital structure. According to the maskless preparation method, preparation of the multi-layer thin-film capacitor can be realized without a mask or a photolithography; and the maskless preparation method has the characteristics of being low in cost and simple in process control.

The invention relates to a method for highly selectively extracting solanesol. The method comprises the following specific processes: soaking and boiling tobacco leaves with deionized water, filtering, baking filtered residue, and crushing to obtain coarse tobacco leaf powder; adding ammonia water into the coarse tobacco leaf powder, performing ammonolysis, and extracting to obtain paste; adding ethyl alcohol into the paste, extracting to obtain a coarse product, and performing post-processing to obtain coarse solanesol; after the coarse solanesol is dissolved, complexing with metal ions in ametal ion aqueous solution to obtain precipitate; and drying the precipitate under reduced pressure, adding a mixed solution of n-hexane and water, oscillating in water bath, separating liquid to obtain an upper organic phase, and drying to obtain white solid, namely, the solanesol, under the reduced pressure. Compared with the conventional process, repeated column chromatography elution is not required to be performed with a large number of organic solvents by the method provided by the invention; high-purity solanesol is obtained by selectively complexing with the solanesol by utilizing silver ions; the process is simple; the product purity is high; the cost is low; and the energy consumption is low.

The invention discloses a lightweight high strength waterproof door. The lightweight high strength waterproof door comprises a base plate, the upper top face of the base plate is fixedly provided witha left border and a right border, the two ends of the left border and right border are matched with a front border and a rear border, a faveolate waterproof paper mesh is hermetically arranged in thefour borders, the top of the faveolate waterproof paper mesh is provided with a top plate, and the upper top face of the top plate is machined with a plurality of annular grooves. The waterproof doorhas the advantages that the structure is simple, the weight is light, the production process is simple, the cost of production materials is low, the waterproof door has a good waterproof function, and is suitable for large-scale industrial production.