38results about How to "Suitable for batch preparation" patented technology

The invention discloses a preparation method of a bi-system high-temperature superconducting material, comprising the following steps of: preparing Bi-2212 powder into a bi-system tape material by adopting a powder tubing method and a clustered drawing technology; dissolving a bonder by using methanol or ethanol as a solvent and then adding the Bi-2212 powder to mix evenly so as to obtain suspension liquid; causing the bi-system tape material to pass through a liquid trough which is loaded with the suspension liquid and then guiding the bi-system tape material to pass through a drying furnaceso as to obtain a bi-system high temperature superconducting tape material which is externally coated with a superconducting film; and carrying out semi-melting treatment on the bi-system high temperature superconducting tape material which is externally coated with the superconducting film and then obtaining the bi-system high-temperature superconducting tape material after cooling with a furnace. The preparation process of the invention is simple, reasonable in design, low in manufacturing cost and large in popularization. In the invention, a layer of Bi-2212 superconducting film is added on the surface of the bi-system tape material prepared by a PIT method so that the silver hypergeometric of the tape material is decreased, the effective superconducting area is increased and the engineering current density of the bi-system tape material is improved.

The invention is a preparation method of carbon-ceramic composite material based on unidirectional tape technology. In the method, carbon fiber is used as a reinforcement, and a carbon fiber unidirectional tape is prepared by compounding with a slurry prepared from a high carbon residue resin, and the unidirectional tape is laminated. , through molding or autoclave molding to make a prefabricated body, and then prepare carbon fiber reinforced ceramic matrix composites through carbonization and infiltration. This method does not require the preparation of an interface layer on the carbon fiber surface, and the uniform distribution of fibers in the matrix can be achieved by using the unidirectional tape process, which can realize continuous production and avoid performance attenuation caused by twists and turns formed by traditional fiber weaving.

The invention discloses a preparation method for a novel electrical heating type air absorption element. The preparation method comprises the following steps that (1), an air absorption alloy material is prepared, specifically, a crushed air absorption alloy is sieved through a vibrating sieving machine, air absorption alloy powder with the specific grain size range between upper and lower screens is obtained, the air absorption alloy powder with the grain size range is immersed in anhydrous ethanol to be subjected to ultrasonic treatment, and the treated air absorption alloy powder is dried for standby application; (2), a metal alloy pipe is prepared, specifically, micropores formed in a dot matrix net type structure are drilled in the pipe wall of the metal alloy pipe, and the drilled metal alloy pipe is cleaned through ultrasonic waves and dried in the air for standby application; and (3), the air absorption element is prepared, specifically, the metal alloy pipe is filled with the treated air absorption alloy powder, and the air absorption element is prepared. According to the preparation method, the technology process is simple and easy to control, the defects of powder falling, inconvenient assembly, wire breaking and the like of an existing air absorption element are overcome, and the air absorption element prepared through the method has higher mechanical strength and machining precision.

The invention discloses a precious metal alkaline solution and a preparation method thereof. The problem that catalyzing boards provided with thin precious metal films cannot be prepared in a batch mode and have high comprehensive cost and low composite efficiency is solved. The precious metal alkaline solution is mainly prepared by evenly mixing materials and 1L of pure water, wherein the materials include 1.5-3.5mol of sodium hydroxide,1.5-3.5mol of potassium hydroxide, 0.5-1.5mol of ammonium hydroxide, 0.5-1.5mol of absolute ethyl alcohol, 4-6mol of rhodium chloride, 4-6mol of iridium chloride, 4-6mol of copper chloride and 4-6mol of sodium chloroplatinite. By utilizing the precious metal alkaline solution and the preparation method of the precious metal alkaline solution, the catalyzing boards with thin precious metal films can be manufactured in the batch mode, the comprehensive cost of the catalyzing boards is effectively reduced, the catalyzing efficiency of the catalyzing boards is improved, and the composite efficiency of the catalyzing boards reaches to 98%.