9results about How to "Small grain" patented technology

The invention discloses a ceramic bearing device for thin glass processing and a ceramic supporting strip preparation method, the ceramic bearing device for thin glass processing comprises a plurality of ceramic supporting strips and a supporting frame, the ceramic supporting strips are vertically arranged, and the plurality of ceramic supporting strips are arranged in parallel; the ceramic supporting strip comprises a continuous ceramic line, and the diameter of the ceramic line is 1-2 mm. The ceramic line is provided with a plurality of first arc-shaped ceramic line segments, every two adjacent first arc-shaped ceramic line segments are connected through a connecting part, and each connecting part comprises a horizontal ceramic line segment or a second arc-shaped ceramic line segment. The first arc-shaped ceramic line segment is of an arc-shaped structure; the arc-shaped ceramic line segment is of an arc-shaped structure; the ceramic support strip is prepared by integral forming; the prepared ultra-thin glass bearing device is resistant to acid and alkali corrosion and stable at high temperature, and the supporting strips used for bearing ultra-thin glass are integrally formed and long in service life.

The invention relates to a tin plating solution, in particular to a neutral tin plating solution for electroplating a terminal electrode of a micro component and a preparation method of the neutral tin plating solution. Methanesulfonic acid as a conductive salt; hydroquinone as an antioxidant; a divalent tin ion; and salts or chelates of hydroxycarboxylic acids and cyclic ester compounds thereof as complexing agents. Compared with the prior art, the method has the main advantages that the method is green and environment-friendly, the wastewater treatment process is simple, the tin plating solution has good dispersing capacity, a plating layer with the uniform thickness can be obtained on the surface of a workpiece, and the obtained plating layer is compact, uniform, small in grain size and free of pores.

The application provides a battery aluminum foil and a preparation method thereof, and relates to the technical field of battery aluminum foils.The preparation method is as follows: S1, hot rolling of an aluminum foil blank to obtain an aluminum foil intermediate body with a thickness of 3.5-4.1 mm; S2, multi-pass cold rolling of the aluminum foil intermediate body under ultrasonic vibration system using lubricating oil to obtain a foil rolling blank with a thickness of 0.35-0.45 mm, wherein, when the cold rolling is rolled to an intermediate pass thickness of 0.6-0.9 mm, complete recrystallization annealing is carried out under nitrogen protection, and the annealing temperature is 400-450 DEG C; S3, foil rolling of the foil rolling blank to obtain an aluminum foil with a thickness of 0.01-0.015 mm; and S4, corona treatment of the aluminum foil, coating of modified paint on the surface of the aluminum foil, drying, and obtaining of the battery aluminum foil.The battery aluminum foil has excellent electrochemical performance, high strength, and high surface roughness.

This invention provides a method for producing lubricating oil base oil from heavy feedstock and the resulting lubricating oil base oil. The method includes: cutting the heavy feedstock to obtain a light component, a middle fraction, and a bottom wax; wherein the boiling point ranges of the light component, the middle fraction, and the bottom wax are 170-300℃, 300-500℃, and >500℃, respectively; subjecting the bottom wax to a first isomerization reaction under the catalysis of a first isomerization catalyst to obtain a first isomerization product; subjecting the first isomerization product and the middle fraction to a second isomerization reaction under the catalysis of a second isomerization catalyst to obtain a second isomerization product; subjecting the second isomerization product to hydrorefining; and then fractionating the obtained refined product to obtain the lubricating oil base oil. The lubricating oil base oil produced by this method has high yield, low pour point, low cloud point, and high viscosity index, making it a high-quality lubricating oil base oil.

The invention provides a nano ZSM-5 molecular sieve and a preparation method thereof. The preparation method comprises the following steps: mixing a first silicon source, a first aluminum source, inorganic alkali, water and amorphous molecular sieve pre-crystallization liquid, and aging to obtain a first raw material mixture; adding a second silicon source into the first raw material mixture to obtain a second raw material mixture, crystallizing, filtering, washing, drying and roasting to obtain the nano ZSM-5 molecular sieve, the second silicon source comprises white carbon black. The invention also provides the nano ZSM-5 molecular sieve obtained by the preparation method. The nano ZSM-5 molecular sieve provided by the invention has the characteristics of small crystal grain, large specific surface area and abundant mesopores and macropores.

This invention relates to high-temperature, high-strength zirconium-hafnium yttrium solid solution oxide continuous fibers, their preparation methods, and applications. In these continuous fibers, hafnium oxide replaces some zirconium oxide sites in a yttrium-stabilized zirconium oxide lattice, forming a single solid solution phase containing zirconium, hafnium, yttrium, and oxygen. The three metal elements are randomly distributed in the lattice, and the phase is either tetragonal or cubic. Using poly(zirconium acetylacetonate) and poly(hafnium acetylacetonate) as the zirconium and hafnium sources respectively, a spinneret is prepared with the addition of a stabilizer. Spinning is then performed to obtain precursor continuous fibers. After vapor pressure desorption and medium-temperature steam treatment, primary crystallized continuous fibers are obtained, followed by high-temperature ultrafast heat treatment to obtain the final product. The zirconium-hafnium yttrium solid solution oxide continuous fibers of this invention exhibit good high-temperature stability. After being held at 1500 °C for 120 min, they still possess high mechanical strength and excellent flexibility, with an average tensile strength of over 1.0 GPa for each filament. They can be used as high-temperature structural reinforcement materials and high-temperature flexible thermal insulation materials.

The application belongs to the technical field of aluminum alloy processing, and particularly relates to a high-strength and high-toughness 7-series aluminum alloy plate with equiaxed crystal structure and a short-process preparation method thereof. The application improves the comprehensive performance of the aluminum alloy by combining extrusion, cold rolling and heat treatment, and can effectively solve the problems of grain deformation, anisotropy of the structure and mechanical properties of the 7-series aluminum alloy plate in the production process. The 7-series aluminum alloy plate is prepared from an aluminum alloy ingot, and the aluminum alloy ingot is composed of the following components in percentage by mass: Zn: 4.5-6.8%, Mg: 1.8-3.0%, Cu: 0.30-0.70%, Mn: 0.30-0.70%, Zr: 0.10-0.20%, Yb: 0.10-0.40%, and the rest is Al, wherein the mass fraction ratio of Zn and Mg is Zn / Mg: (2.7-3.1):1. The application adopts a short-process high-efficiency preparation method, eliminates the original fibrous structure, improves the anisotropy of the mechanical properties of the material, and obtains the 7-series aluminum alloy plate with equiaxed crystal structure, a tensile strength greater than 550 MPa, an elongation after fracture greater than 12% and other excellent comprehensive properties.

The invention provides NaY zeolite and a preparation method thereof.The preparation method comprises the steps that an alkali source, an aluminum source, a silicon source and water are mixed in proportion, and a guiding agent is obtained; the method comprises the following steps: firstly, pretreating a guiding agent, an alkali source and an aluminum source according to the molar ratio of (10-20) Na2O: Al2O3: (5-20) SiO2: (150-450) H2O; adding a silicon source, an alkali source, an aluminum source and water according to the molar ratio of (1.5-4) Na2O: Al2O3: (5-10) SiO2: (100-300) H2O, and treating again to obtain gel; and dehydrating the gel to 45-90% of the original weight, and crystallizing to obtain the NaY zeolite. According to the method, the gel is prepared by adopting a specific charging sequence, and then the gel is subjected to dehydration treatment, so that the related ratio of a synthesis system is changed, and the NaY zeolite with high crystallinity, high silica-alumina ratio, nanosheet shape and small crystal grains is obtained through crystallization.

The invention belongs to the technical field of functional sugar preparation, and particularly relates to a crystallization method of low-purity psicose. For the psicose feed liquid with low purity (below 95%), the viscosity reducer is added, the viscosity of the product is reduced, then the psicose crystal is prepared in a mode of combining evaporative crystallization, crystal arrangement and cooking crystallization, the prepared product is low in water activity, the water activity is below 0.2, the crystal fluidity is good (the angle of repose is smaller than or equal to 25 degrees), the crystal distribution is concentrated (80-120 meshes), the purity is larger than or equal to 99.5%, and the psicose crystal can be used for preparing the psicose crystal. The crystal has no adhesion phenomenon, the crystal form is regular, and the crystallization yield is high (up to 70%).