39results about How to "Overcome fragile" patented technology

The invention discloses a flush membrane piezoresistive ceramic pressure sensor, which includes a ceramic ring, a ceramic elastic diaphragm printed and sintered on the upper part of the ceramic ring by glass glaze paste, and a ceramic elastic diaphragm printed and sintered on the lower part of the ceramic ring by conductive paste The signal conditioning circuit; wherein, the ceramic elastic diaphragm is uniformly provided with four pads respectively connected to the four ceramic ring through holes on the ceramic ring, and connected to the pads to form a Wheat Four bridge resistors of the Dayton bridge; a bridge trimming resistor is arranged between the pad and the bridge resistors. In the present invention, the ceramic elastic diaphragm is printed and sintered on the ceramic ring through glass glaze paste, which overcomes the fragile problem of the ceramic diaphragm and ensures the reliability of the mechanical structure of the sensor; at the same time, the signal conditioning circuit is also printed and sintered through conductive paste On the ceramic ring, the overall accuracy of the sensor is higher and the stability is better.

The invention relates to a preparation method for a positively charged three-dimensional nanofiber membrane. The preparation method comprises the following steps of: 1, preparing a meshed ceramic fiber framework; 2, synthesizing a rodlike or sheet-type nanoparticle on the surface of the framework obtained in the step 1 by a hydrothermal method or a steam-thermal method; and 3, obtaining a needlelike nanofiber on the nanoparticle by a soft template precipitation method. By a wet chemical method, the flexible meshed ceramic fiber framework which is capable of automatic adhesion to form a membrane and has small elastic modulus is synthesized, and a three-dimensional nano charged gamma-Al2O3 fiber is self-assembled and synthesized in situ on the surface of the framework, so a branch shaped three-dimensional structure extends from the surface of the framework, and an inorganic charged fiber membrane which can be used at high temperature and has large specific surface area and high charged electric quantity is prepared.

The invention provides a composite slag remover and a manufacturing process thereof, and belongs to the field of pulp slag removal equipment. The composite slag remover comprises an inner container (1) made of ceramic. The composite slag remover is characterized in that a layer of high molecular elastic material (2) coats the outer side of the inner container (1), and the inner container (1) and the high molecular elastic material (2) are composited into an integrated structure. The manufacturing process of the composite slag remover sequentially includes the steps that a green body, made of aluminum oxide, of the inner container (1) is prepared in an isostatic pressing mode under the pressure of 120-300Mpa, a numerically controlled lathe is utilized to turn the inner side and the outer side of the green body of the inner container (1), the green body is fired into the inner container (1), the molten high molecular elastic material (2) coats the outer side of the inner container (1) under the pressure of 20-30Mpa, and vulcanization is conducted. The composite slag remover has the advantages of being high in strength, light in weight, accurate in installing geometric dimension, convenient to install, low in using cost and friction coefficients of the ceramic inner container, and capable of improving the paper pulp purifying rate and achieving energy saving and environment friendliness.

The invention aims to provide a thermoelectric air conditioning unit and a car air conditioning seat with the same. The car air conditioning seat with the thermoelectric air conditioning unit is suitable for a car and energy efficiency ratio is improved. The thermoelectric air conditioning unit comprises thermoelectric devices, copper-clad films and cooling fins. The copper-clad films are arranged on the upper and lower sides of the thermoelectric devices, and the cooling fins are arranged on the sides of the copper-clad films in a laminating mode, opposite to the thermoelectric devices.

The invention discloses a hole-filling glue for adjusting the unbalance amount of a grinding wheel of a rail milling and grinding vehicle and a method for using the hole-filling glue. (5.8% ~ 8.7%) by mixing the proportion. After curing, the tensile modulus of the potting glue is 1.5GPa, the shear modulus is 0.8GPa, the tensile strength is 24.5MPa, and the elongation at break is 8.0%. It is suitable for ceramic bonding with large outer diameter, heavy mass and no matrix. Grinding wheels for rail milling and grinding vehicles. The hole-filling glue for adjusting the unbalance amount of the grinding wheel of the rail milling and grinding vehicle provided by the invention can overcome the problems that the cement is easy to fall off, the appearance of the grinding wheel is affected by the heavy-duty drilling, and the grinding wheel is easily broken, and the problem of the static balance adjustment of the grinding wheel of the rail milling and grinding vehicle is solved.

The invention discloses a preparation method of a stretchable conductive fiber with low resistance change. According to the method, polydimethylsiloxane is added dropwise to the surface of the water,heat treatment is performed, and a polydimethylsiloxane film is stripped off from the surface of the water to prepare the polydimethylsiloxane film; a metal evaporator is utilized, and a metal film isvapor-deposited on the polydimethylsiloxane film and is taken as a conductive layer; the polydimethylsiloxane film loaded with the metal film is laid on a substrate and curled to prepare the conductive fiber. The method is advantaged in that the conductive fiber is stretchable and has low resistance change, the preparation method is simple, the preparation condition is mild, and the method has far-reaching significance for further development and promotion of flexible electrodes and flexible electronics.