40results about How to "Not limited by size" patented technology

The invention relates to a method for preparing a FeSe superconducting thin film by post-selenization treatment;in the method, a FeSe thin film is deposited by reactive sputtering; the method comprises the following steps: performing surface treatment of a substrate; sputtering and depositing a FeSe thin film on the substrate by reactive sputtering film deposition technology; putting both the FeSe thin film and amorphous simple substance selenium in a quartz tube, performing vacuum sealing; putting the sealed quartz tube in a heating furnace, heating to perform a selenization reaction to obtain the FeSe thin film. With the invention, the stress generated after selenization treatment is significantly reduced; impurity phases, air pores and cracks generated as a result of excessive distortion energy are reduced; and excellent superconductive performance of the thin film is brought into play. Additionally, when compared with commonly-used pulse laser deposition methods, the preparation method combining reactive sputtering with improved selenization treatment has great advantages in cost control, and is not restricted by dimensions.

The invention discloses a process for recycling aluminum, potassium and gallium by quickly reducing and desulfurizing alunite at high temperature. The process comprises the following steps: roasting and dehydrating alunite ore powder at a certain temperature and within a certain time period to obtain alunite clinker; uniformly mixing with solid reductant coal according to a certain ratio, and carrying out fast high-temperature reduction roasting on alunite clinker the at a certain high temperature to realize desulfuration; extracting potassium from desulfurized calcine through water leaching, removing residual sulphur from the calcine; carrying out evaporative crystallization on water leaching solution to obtain a national standard product potassium sulfate; dissolving out aluminum and a small amount of potassium and metal gallium from water leaching residuals by a low-temperature low-alkali Bayer method; performing seed precipitation on leachate for recycling aluminum oxide, returning a seed precipitation mother solution to the dissolution process; regularly performing carbon decomposition on a part of the leachate for recycling the aluminum, potassium and gallium to obtain aluminum oxide, carbonate potassium and sodium carbonate and gallium-enriched precipitates, wherein the leaching residuals obtained through the low-temperature low-alkali Bayer method can be used as silicon raw materials for building products.

The invention discloses a large-scale crane hook group, which mainly comprises pulleys, pulley shafts, a spherical roller bearing, a spherical roller pushing force bearing, hook nuts and a shedding preventing chain, and the large-scale crane hook group also comprises pulley supporting frames, a hinge shaft I, a balance beam, a hinge shaft II, a hook shaft, an upper part of a hook body and the hook body, wherein the pulleys are divided into two groups by two pulley shafts, and each group is connected with one pulley supporting frame to form two pulley groups; the pulley supporting frames are respectively connected with the balance beam through the hinge shaft I, the balance beam is connected with the hook shaft through the hinge shaft II, the lower part of the hook shaft is connected with the hook nuts through screw threads, and the upper part of the hook body is connected to the hook body in a welding form. The large-scale crane hook group solves the problem of deflexion caused by the change in length of a steel wire rope and makes the processing and the assembly of large-scale forging hook shafts and large-scale forging hook bodies realize simply and easily. The large-scale crane hook group has the advantages of simple structure style, convenient assembly and low cost.

The invention relates to a polydimethylsiloxane-dual scale silicon dioxide composite super-hydrophobic coating and a forming method thereof. The composite super-hydrophobic coating comprises a polydimethylsiloxane layer and silicon dioxide particles uniformly dispersed on the polydimethylsiloxane layer. The composite super-hydrophobic coating is obtained by a method of curing a polydimethylsiloxane coating material containing large-particle-size silicon dioxide nanoparticles and then firing the coating, and the composite super-hydrophobic coating is of a secondary rough surface structure. According to the invention, the durability of the coating is strengthened, and the super-hydrophobic performance of the surface is recovered by a method of polishing or re-firing, so as to keep the excellent performance of the coating for a long time.

The invention relates to a fuel vaporizing combustion device with high firepower and long service life. The fuel vaporizing combustion device comprises a combustion portion and a heat dissipation mechanism, the heat dissipation mechanism comprises a distribution ring, an upper shell and a lower shell, openings are formed at the tops of the upper shell and the lower shell, an air inlet hole communicated with a fan is formed at the bottom of the lower shell, the distribution ring is assembled in the lower shell, the bottom of the upper shell is connected with the top of the distribution ring and assembled at the top of the lower shell, the combustion portion is communicated with the air inlet hole and assembled inside the top of the upper shell, the inner diameter of the middle of the distribution ring is smaller than that of the bottom of the distribution ring, and a plurality of vent holes are formed in the side wall of the distribution ring close to the bottom edge. By the aid of the distribution ring, all parts of the combustion device in use are continuously cooled, temperature rise of the parts is effectively decelerated, the service lives of the parts are effectively prolonged, the combustion device can be continuously used for six hours, and continuous usage time of the combustion device is obviously prolonged.

The invention relates to a fully-perforated water-resistant microwave absorbing material and a preparation method thereof. The fully-perforated water-resistant microwave absorbing material comprises sponge of which one or two surfaces are provided with a microwave absorbing solution layer, wherein the microwave absorbing solution consists of the following components in percentage by mass: 25 to 35 percent of a microwave absorbent, 50 to 55 percent of a water-based adhesive, 14 to 25 percent of a flame retardant, and 0.1 to 0.3 percent of a filling material. During preparation, by adopting a spraying technology, the water-based microwave absorbing solution is sprayed on one or two surfaces of the fully-perforated sponge, the spraying quality is controlled, and the sponge is dried to ensure that the fully-perforated sponge material has a broadband microwave absorption performance. Test results show that the vertical reflectivity of the fully-perforated water-resistant microwave absorbing material with the thickness of 2 centimeters is less than -12dB in a frequency range of 2 to 18 GHz. The microwave absorbing solution mainly comprises the materials including the microwave absorbent, the water-based adhesive, the flame retardant, the filling material and the like, and the fully-perforated water-resistant microwave absorbing material is prepared by adopting spraying.

A reaction device for catalytic dehydrogenation-cracking of alkanes to produce olefins, comprising a reactor for catalytic dehydrogenation-cracking and a settling section of the reactor, the settling section of the reactor is located on the upper part of the reactor, wherein the reactor includes a dehydrogenation tank A phase reaction section and a cracking reaction section, the cracking reaction section is located below the dehydrogenation dense phase reaction section, and the diameter of the cross section of the cracking reaction section is smaller than the diameter of the cross section of the dehydrogenation dense phase reaction section. The reaction device combines dehydrogenation cracking and catalytic dehydrogenation, and the overall reaction temperature and catalyst regeneration temperature are greatly reduced. The diameter of the reaction device gradually shrinks along the fluid flow direction to reduce the secondary conversion of olefins caused by back-mixing.