6results about How to "Change crystal structure" patented technology

The invention belongs to the technical field of guide groove manufacturing, and discloses a logistics sorting trolley driven roller guide groove manufacturing technology which comprises the following steps that a, a steel pipe is provided to serve as a base material of a guide groove; b, one or more channels are formed in the outer surface of the steel pipe; c, when the channel is formed, the material of the steel pipe is subjected to plastic deformation in the channel area; and d, the degree and the position of plastic deformation are adjusted, so that the required guide groove shape is achieved. According to the invention, the channel is directly formed on the steel pipe, the plastic deformation is carried out, and the heat treatment or cooling process is applied, so that the manufacturing method and equipment of the guide groove are improved; according to the improved method and device, aluminum pipe machining and connecting steps in a traditional technology are avoided, the manufacturing efficiency is multiplied, the manufacturing cost is reduced, the strength, stability and durability of the guide groove are improved, and the performance of the guide groove can be improved.

The utility model relates to the technical field of oil exploitation, in particular to a tubular anti-scale and anti-wax oil well pump which comprises a pump cylinder coupling, a pump cylinder, an anti-scale and anti-wax alloy plunger assembly, an anti-scale and anti-wax alloy standing valve assembly, an oil pipe coupling and an anti-scale and anti-wax alloy device. The pump cylinder coupling is in threaded connection with the upper end of the pump cylinder; an anti-scale and anti-wax alloy plunger assembly is arranged in the pump cylinder; the anti-scale and anti-wax alloy standing valve assembly is mounted at the lower end of the pump cylinder; and the tubing coupling is respectively connected with the lower end of the anti-scale and anti-wax alloy standing valve assembly and the anti-scale and anti-wax alloy device. Due to the design of the anti-scale and anti-wax alloy assembly, the contact area between the anti-scale and anti-wax alloy and oil liquid is increased, the oil liquid and the anti-scale and anti-wax alloy can make more sufficient contact and catalysis, formation of new scales can be prevented, and dissolution of old scales is promoted. The wax crystal form is changed by utilizing the conductivity and the surface catalytic characteristic of the anti-scale and anti-wax alloy, so that the freezing point is greatly reduced, and the anti-wax effect in the lifting process is achieved.

The invention provides a brazing type plate heat exchanger which comprises a fixing frame, and a heat exchange body is fixed in the fixing frame. The heat exchange main body is sleeved with the water treatment assembly capable of sliding in the vertical direction, the water treatment assembly comprises a mounting frame, and multiple layers of magnetic treatment parts are arranged on the inner wall of the mounting frame; the magnetic processing part comprises a plurality of magnetic blocks which are uniformly distributed in the mounting frame; and the flow mixing blocks are arranged on the heat exchange plate. According to the technical scheme, the physical effect of the magnetic mixed flow block and the chemical effect of magnetization treatment are combined, formation and deposition of scaling are effectively reduced, the turbulence intensity is increased through movement of the magnetic balls, the thickness of a fluid boundary layer is reduced, the heat exchange efficiency is improved, the problems of blockage and corrosion caused by scaling are solved, the cleaning frequency is reduced, and the service life of the magnetic mixed flow block is prolonged. The equipment operation period is prolonged, the use of chemical cleaning agents is reduced or avoided, and the maintenance cost and the environmental influence are reduced.

This invention provides a rare-earth-doped potassium sodium niobate transparent ceramic, its preparation method, and its application. Its chemical composition is: (K 0.5 Na 0.5 ) （1‑x‑y） Eu x Y y Nb （1‑z） Ta z O3, where 0 < x < 0.1, 0 < y < 0.01, 0 < z < 0.02. The rare-earth-doped potassium sodium niobate transparent ceramic of the present invention exhibits high light transmittance and light-changing properties; with the introduction of Y and Ta, the crystal structure and microstructure of the material are changed, increasing the vacancy-related defects of the material, while inhibiting the grain growth of the material, thereby simultaneously improving the light transmittance and light-changing rate of the ceramic. Its light transmittance can reach more than 70%, and the light-changing rate can reach up to 37.58%.

The present invention provides a preparation method of an interface layer for connecting dissimilar metals and a welding method based on the interface layer. The first step is to deposit a layer of AlNi intermetallic compound film with a thickness of nanometers on the surface of steel by a vapor deposition method, and the AlNi intermetallic compound has a simple cubic structure; the second step is to use the nanometer-scale AlNi intermetallic compound film deposited on the surface of the steel as the interface layer for connecting the magnesium alloy and the steel; the third step is to use an ultrasonic spot welding method to achieve the metallurgical connection of the magnesium alloy / steel with a pre-set AlNi intermetallic compound layer, and to obtain the interface connection structure of the magnesium alloy / AlNi intermetallic compound layer / steel by optimizing the welding process parameters. The present invention controls the type and thickness of the interface layer by pre-setting the interface layer, and at the same time promotes the metallurgical reaction between the interface layer and the alloy elements of the parent materials on both sides, and maintains the structural integrity of the interface layer. The method has the characteristics of adjustable type and thickness of the interface layer, is convenient for mass production, and can expand the scope of application.

The present invention discloses a dielectric ceramic material based on barium titanate and a preparation method thereof in the technical field of dielectric ceramic materials, which is prepared from the following components in parts by weight: 100-120 parts of modified barium titanate powder and 0.8-1.2 parts of polyvinyl alcohol; the modified barium titanate powder is prepared from the following components in parts by weight: 60-66 parts of tetrabutyl titanate, 72-79 parts of barium chloride, 0.6-0.9 parts of cobalt chloride, 0.3-0.5 parts of aluminum nitrate, and 2.4-3.2 parts of 2-methylimidazole. The present invention proposes to prepare a modified barium titanate powder, dope it with cobalt and aluminum, and form an organic framework by in-situ polymerization with 2-methylimidazole, so as to improve the dielectric constant of the barium titanate material and the breakdown strength.