40results about How to "Avoid natural oxidation" patented technology

A magnetization controlling element includes a ferromagnetic material layer, an exchange coupling adjustment layer, an antiferromagnetic material layer, an electrode layer, a magnetic field applying mechanism which applies a magnetic field to the antiferromagnetic material layer, and an electric field applying mechanism which applies an electric field to the antiferromagnetic material layer. The antiferromagnetic material layer contains an antiferromagnetic material or ferrimagnetic material having a magnetoelectric effect, the ferromagnetic material layer includes a perpendicular magnetization film having a magnetization component perpendicular to the film surface, the ferromagnetic material layer includes a ferromagnetic material layer that is magnetically connected, through exchange coupling, to the antiferromagnetic material layer. The exchange coupling adjustment layer has a function of adjusting exchange coupling between the ferromagnetic material layer and the antiferromagnetic material layer.

The invention belongs to the field of machine manufacturing, and specifically relates to a method for preparing nano-plastic by waste plastic. The method comprises the following steps: carrying out crushing, impurity removal, catalytic hydrocracking, modification, vacuum defoaming and sizing on waste plastic; adding 1-2% of a coupler, 1-2% of a compatilizer and 5-10% of inorganic filer to mix, stir and modify, wherein the coupler is amino silane, the compatilizer is maleic anhydride and the inorganic filer is superfine talcum powder; the content of the superfine talcum powder is 10-30%. After a series of treatments to thermoset waste plastic, not only are wastes recycled, but also the thermoset waste plastic is purified, thereby reducing the environmental pollution, and increasing heat resistance, wear resistance and flame resistance of reproduced plastic. The method is wide in market application.

The invention discloses a polyurethane flame-retardant nano paint. The polyurethane flame-retardant nano paint comprises following raw materials, by weight, 10 to 20 parts of graphite, 5 to 15 parts of molybdenum disulfide, 5 to 10 parts of aluminium oxide, 2 to 6 parts of xylene, 2 to 6 parts of polyurethane modified epoxy resin, 2 to 6 parts of a curing agent, 12 to 15 parts of a bonding agent, 1 to 4 parts of an auxiliary agent, 15 to 20 parts of purified water, and the like.

The invention discloses a production process for crystallized nano PET (Polythylene Terephthalate) plastic. The production process comprises the following steps: (1) preparing raw materials; (2) blending: mixing terephthalic acid prepared in the step (1) with ethylene glycol (EG), wherein the mass ratio of the terephthalic acid to the ethylene glycol (EG) is 1 to (1.5-2), adding a CaCO2 organic filling agent into a mixed solution, wherein the mass content of the filling agent is 3%-5% (3) carrying out an exchange reaction; (4) carrying out a condensation polymerization reaction; (5) enhancing and modifying; and (6) crystallizing and separating. According to the production process, after the raw materials are subjected to a series of treatment, PET rubber not only has a good physical and mechanical performance, good electrical insulating property, good creep resistance, good fatigue resistance, good wear resistance and good size stability in a wide temperature range, but also has a rapid crystallization rate and is easy to mold and process; the PET rubber has the characteristics of strong shock resistance and the like.

This invention provides a steam oxidation method of a matter to be oxidized with proper controllability and reproducibility. It is provided a steam oxidation method, where a semiconductor substrate (a matter to be oxidized) is housed in a steam oxidation reactor and is subjected to: a first step of supplying N2 gas to the reactor housing the semiconductor substrate and substituting the inside of the reactor with N2 gas; a second step of stopping supply of the N2 gas and supplying a steam-accompanied N2 gas, in which the N2 gas is accompanied with steam, to the reactor; a third step of increasing a temperature of the semiconductor substrate to 450° C. (a steam oxidation temperature) while supplying the steam-accompanied N2 gas; and a fourth step of holding the semiconductor substrate for a predetermined time at 450° C.

The invention discloses a method of preparing a nano fire retardant coating by using wastes. The method is characterized by comprising the following technical steps: (1) selecting the following raw materials in percentage by weight: 65% of polystyrene foam, phenolic foam plastic, waste rubber and nitryl fibers, 15% of industrial alcohol, coal tar, acetone and a hydrosolvent, 15% of pigments and fillers, and 5% of a wetting dispersing agent, a defoamer, a delustering agent and a plasticizer assistant; (2) melting and extracting; (3) pre-extracting; (4) dispersing; (5) reconciling and modulating colors; (6) filtering; and (7) packaging. The method provided by the invention is reasonable and concise in process, the process flow is greatly shortened, the raw material of the coating is wide in source, and the method belongs to waste recycle, so that the production cost is lowered. Meanwhile, coatings with various functions are conveniently prepared according to raw material ratio, so that the method is applicable to demand of production process. The inventory rating and proportioning are accurate with less inventory rating, the product quality is ensured, and the yield of enterprises is effectively improved.

The invention discloses an aqueous nano-coating. The aqueous nano-coating is characterized by being prepared from a component A and a component B, wherein the formula of the component A is as follows: 60-80 parts of hydroxyl polyacrylate dispersoid, 0.2-0.3 parts of leveling wetting agent, 12-25 parts of polyacrylic acid, and 20-30 parts of polyisocyanates; the component B comprises 6-9 parts of polyisocyanate curing agent; the aqueous nano-coating is prepared through the following steps: adding the component A to a container according to the formula, stirring at the middle speed, sequentially adding deionized water, the leveling wetting agent, a cosolvent, a defoaming agent and a thickening agent, dispersing for 20-30min at high speed, adding the water-dispersibility polyisocyanate curing agent according to the certain proportion, and fully stirring to obtain the aqueous nano-coating.

The invention provides a biodegradable flame resistance material. The flame resistance material is characterized in that starch and chitosan are used as main components, red phosphorus is used as flame resistance additive, starch / chitosan can provides a great deal of carbon, chitosan contains nitrogen element, when acid source is added in red phosphorus, the flame resistance of the biodegradable material is effectively improved and the usable range of the biodegradable composite material is expanded so that the biodegradable composite material has wider application area; the preparation method adopts solution method, ultrasonic dispersion and mechanical high-speed agitation so that red phosphorus used as fire retardant can be dispersed in solution on nano-scale and the autoxidation of thecomposite material can be effectively avoided, thus the composite material can have better mechanical performance.