39results about How to "Low defect content" patented technology

The invention provides a graphene dispersing agent as shown in a formula (I), a formula (II) or a formula (III) in the Specification. The graphene dispersing agent consists of a naphthalene tetracarboxylic acid bisimide unit, an anion group and an alkyl chain. Firstly, the naphthalene tetracarboxylic acid bisimide unit and graphene have strong attraction to each other, so that the whole molecules can be combined with the graphene; secondly, the anion group has excellent water solubility, so that the combined object of the molecules and the graphene can be fully dispersed in water; moreover, the alkyl chain can be used for separating the naphthalene tetracarboxylic acid bisimide unit from the anion group, so that the naphthalene tetracarboxylic acid bisimide unit and the anion group can act independently. Therefore, through the combination of the naphthalene tetracarboxylic acid bisimide unit, the anion group and the alkyl chain, the graphene dispersing agent provided by the invention has excellent graphene dispersing capability; the graphene prepared by using the graphene dispersing agent and adopting an ultrasonic method is not subjected to the oxidation-reduction process, so that the flaw content is low, and the preparation cost is low.

A forming method of a semiconductor structure includes the following steps: providing a substrate; forming a high k gate medium layer on the surface of the substrate; forming a sacrificial layer on the surface of the high k gate medium layer; conducting defect passivation annealing on the high k gate medium layer, wherein the defect passivation annealing is carried out in an atmosphere lacking defect passivation ions, and the defect passivation ions enter the high k gate medium layer via the sacrificial layer during the defect passivation annealing process; removing the sacrificial layer; and forming a gate electrode layer on the surface of the high k gate medium layer. According to the method, a problem of dielectric relaxation of the high k gate medium layer is overcome, the density of the high k gate medium layer and the density of an interfacial layer are increased, and thus the electrical performance of a semiconductor structure formed by the method is improved.

The invention relates to the technical field of chemical fiber processing and particularly relates to a method for preparing fine denier strong viscose fibers. The method comprises the following steps: mixing softwood dissolving pulp and broadleaf wood dissolving pulp according to a certain ratio, dipping, squeezing and grinding to obtain alkali cellulose, and performing oxidative degradation andyellowing on the alkali cellulose to obtain a cellulose sulfonate solution; adding a small amount of a denaturing agent into the cellulose sulfonate solution, filtering, defoaming and curing to obtaina viscose stock solution containing the denaturing agent; spinning by adopting a two bath process, and performing special after-treatment on the formed viscose fibers, so as to obtain the fine denierstrong viscose fibers with low defect content. The preparation method is simple, the cost is low, the prepared fine denier strong viscose fibers are extremely low in defect content and extremely lowin residual sulfur content and can be applied to the field of textile and garment, and the used raw material pulp totally comes from raw woods and has the environmental-friendly characteristics of being natural, safe and recyclable.

The invention relates to the technical field of chemical fiber processing, in particular to a clean high-white viscose fiber preparation method which includes the steps: performing meal mixing on softwood dissolving pulp and hardwood dissolving pulp according to a certain proportion, soaking, squeezing and crushing mixture to obtain alkali cellulose, oxidizing, degrading and yellowing the alkali cellulose to obtain sulphonic acid ester solution; performing filtering, defoaming and ripening to obtain viscose stoste, uniformly mixing the viscose stoste and matting agent dispersion liquid, conveying mixture into a spinning machine, and coagulating the mixture to regenerate nascent fibers; converging the nascent fibers into long tows by a godet and a two-bath groove, and enabling the long tows to sequentially enter a drawing machine, a nap groove and a desizing machine to obtain the clean high-white viscose fiber. The prepared clean high-white viscose fiber is low in defect content and less in residual sulfur content and can be used for the fields such as non-woven fabrics and medical sanitation materials, and used pulp raw materials are completely from native woods and have natural,safe, reproducible and environment-friendly advantages. The clean high-white viscose fiber is simple to prepare and low in cost, and the market competitiveness of the viscose fiber can be improved.

The invention discloses an anti-carbonization concrete tubular pile and a preparation method therefor. The anti-carbonization concrete tubular pile consists of the following raw materials in parts by weight: 10-16 parts of light calcium carbonate, 1-2 parts of wool grease, 0.7-2 parts of sodium lauroyl sarcosine, 20-30 parts of potassium feldspar powder, 3-4 parts of n-methyl pyrrolidone, 500-640 parts of ordinary silicate cement, 300-400 parts of yellow ground, 200-300 parts of gravels, 7-14 parts of a polycarboxylate water reducer, 0.1-0.2 part of dibenzoyl peroxide, 5-6 parts of maleic anhydride, 2-3 parts of polyethylene glycol monoethylether, 0.7-2 parts of sp-80, 50-70 parts of waste rubber powder, 0.1-0.2 part of triethylamine, 16-20 parts of polyethylene wax and 2-4 parts of polyvinyl butyral. The anti-carbonization concrete tubular pile can reduce quantity of harmful holes and defects in a concrete structure, reduces alkalinity of hydration products and promotes low-strength hydration products to transform into high-strength hydration products.

The invention provides an aluminate red phosphor activated by manganese ion and a preparation method thereof. A feature chemical general formula of the red phosphor is that M1-xAl12O19-2xA2x: Mnx, wherein M is at least one type of Mg, Ca, Sr or Ba, A is C1 or F and 0<x<=0.1. The preparation method comprises the steps: oxide of the Mg, the Ca, the Sr, the Ba or the Mn or relative salt, aluminum oxide, halide containing Cl iron and F iron are accurately weighed according to a ratio of the general formula, evenly mixed with a fluxing agent, sintered for 1 hour to 2 hours at the temperature of 600 DEG C-800 DEG C and then sintered for 4 hours to 10 hours at the temperature of 1500 DEG C-1630 DEG C. The powder obtained after sintering is smashed, washed, screened, water-powder-separated and dried so that the aluminate red phosphor activated by the manganese ion is obtained. The red phosphor is capable of emitting red light rays of 620 nm-700 nm under action of light of 250 nm-500 nm and has the advantages that in the range from ultraviolet to a visible region, absorption is performed by a board band, emitting is performed by a narrow band and color purity is high. The red phosphor is suitable for ultraviolet and a blue ray light emitting diode (LED) chip.

The invention discloses a silicon-based solar cell, comprising a transparent electrode, wherein the transparent electrode is a graphene film, and the thickness is not more than 20nm. The thin film isprepared by a suction filtration method, so as to ensure the uniformity of the thin film and the stability of the device. A water transfer method is used to control the thickness of the graphene filmat a nanometer level, and the transmittance of the film is improved. During the transfer process, micro-wrinkles are introduced to increase the contact area between the film and the photosensitive layer. After high temperature treatment, the graphene defects are few and the film strength is high, which can withstand the stress change in the process of repeated folding of the flexible electrode. The whole process is simple, green and easy to operate. Comparatively speaking, the graphene film has high electron mobility and relatively low light transmittance, and the solar energy absorbance of silicon is increased by continuous reflection, and the electron holes generated by the graphene film can be separated under the action of a built-in electric field, so as to improve the light conversionefficiency.

The invention discloses a concrete pipe pile which is prepared from the following raw materials in parts by weight: 500-640 parts of common silicate cement, 300-400 parts of yellow sand, 200-300 parts of gravels, 14-20 parts of aluminum phosphate, 7-15 parts of a poly carboxylic acid water reducing agent, 16-20 parts of polyethylene wax, 0.1-0.2 part of dibenzoyl peroxide, 5-6 parts of maleic anhydride, 2-3 parts of methoxy polyethylene glycol, 4-7 parts of ethyecellulose, 0.7-2 parts of sp-80, 50-70 parts of waste rubber powder and 0.1-0.2 part of triethylamine. According to the concrete pipe pile disclosed by the invention, by doping the ethoxylated rubber fiber, the inner pore structure of the concrete can be effectively improved to form a lot of closed pores to prevent pores from forming a continuous penetrating netty structure system so as to play a role of further enhancing inhibition of invasion of carbon dioxide. In addition, the content of harmful pores and defects in the concrete structure can be further reduced, the alkalinity of hydration products is reduced, and the low-strength hydration products are promoted to be converted into high-strength hydration products.

The invention discloses a bauxite and brucite concrete tubular pipe which is prepared from the raw materials in parts by weight: 2-3 parts of dinonyl barium naphthalenesulfonate, 13-20 parts of bauxite, 1-2 parts of calcium phosphate, 0.1-0.2 part of sodium thiosulfate, 3-7 parts of brucite amianthine, 7-10 parts of n-methyl pyrrolidinone, 500-640 parts of common silicate cement, 300-400 parts of yellow sand, 200-300 parts of gravels, 7-15 parts of a polycarboxylic acid based superplasticizer, 16-20 parts of polyethylene wax, 0.1-0.2 part of dibenzoyl peroxide, 5-6 parts of maleic anhydride, 2-3 parts of polyethylene glycol monomethyl ether, 4-7 parts of ethyecellulose, 0.7-2 parts of sp-80 and 50-70 parts of waste rubber powder. By doping ethoxylated rubber fiber, the inner pore structure of the concrete can be effectively improved to form a lot of close pores so as to prevent capillary pores from forming a continuous cut-through netty structural system, thereby forming an anti-carbonizing zone which plays a reinforcing effect in inhibiting invasion of carbon dioxide.

The invention relates to a six-stage formation process of a high-stability high-voltage anode foil. The invention discloses a six-stage formation process of a high-stability high-voltage anode foil. The six-stage formation process comprises the following steps: (1), performing pretreatment; (2), performing primary formation; (3), performing secondary formation; (4), performing monobutyl phosphatetreating 1; (5), performing third-stage formation; (6), performing fourth-stage formation; (7), carrying out sheet burning treatment 1; (8), performing phosphoric acid treatment 1; (9), performing five-stage formation; (10), performing' six-stage formation; (11), performing phosphoric acid treatment 2; (12), repairing the rear end 1; (13), performing phosphoric acid treatment 3; (14), repairing the rear end 2; (15). carrying out sheet burning treatment 2; (16), repairing the rear end 3; and (17), performing post-treatment. The six-stage formation process of the high-stability high-voltage anode foil is simple in process and easy to operate, the high-stability high-voltage anode foil can be produced in batches, and the produced anode foil has the multiple advantages of being high in capacity, low in electric leakage, high in bending and high in hydration resistance.

The present invention discloses a high friction uplift-resistant concrete tubular pile. According to the present invention, with doping of the ethoxylated rubber, the internal pore structure of concrete can be effectively improved and a large number of closed pores are formed, such that the capillary pores can be prevented from formation of the continuous and penetrating network structure system, the anti-carbonation zone can be formed, and the further enhancement effect is provided for the inhibition of the intrusion of carbon dioxide; and the contents of the harmful pores and the defects in the concrete structure can be effectively reduced, the alkality of the hydration product is reduced, and the conversion of the low strength hydration product to the high strength hydration product is promoted.

The invention discloses a modified fiber concrete tubular pile. The modified fiber concrete tubular pile comprises, by weight, 0.1-0.2 parts of dimethylolpropionic acid, 7-10 parts of n-methylpyrrolidone, 10-20 parts of bone black, 500-640 parts of ordinary portland cement, 300-400 parts of yellow sand, 200-300 parts of broken stone, 7-15 parts of a polycarboxylic acid water reducer, 16-20 parts of polyethylene wax, 0.1-0.2 parts of dibenzoyl peroxide, 5-6 parts of maleic anhydride, 2-3 parts of methoxy polyethylene glycol, 4-7 parts of ethyl cellulose, 0.7-2 parts of sp-80, 50-70 parts of waste and old rubber powder, 0.1-0.2 parts of triethylamine and 2-3 parts of an IPDI trimer. The modified fiber concrete tubular pile further improves carbon dioxide intrusion inhibition, reduces harmful aperture and defect contents of a concrete structure, reduces hydration product alkalescence and promotes conversion of a low strength hydration product into a high strength hydration product.

The invention discloses a treatment method for modifying a metal passivation film through dielectric barrier discharge. The method comprises the following steps of firstly, polishing metal to be treated, and carrying out ultrasonic vibration washing in absolute ethyl alcohol and acetone separately to obtain a vibration washing sample; secondly, drying the vibration washing sample, and storing thevibration washing sample in a vacuum environment for later use; and finally, preheating a double-dielectric barrier discharge instrument, setting device parameters, then placing a standby sample to betreated between dielectric plates, carrying out frequency modulation until stable current output is achieved, after dielectric barrier discharge treatment is completed, turning off a power supply, taking out the treated sample, and obtaining a thickened passivation film on the surface of the treated sample. The method is low in cost, easy to operate, efficient and suitable for various metals andalloys, the corrosion resistance and high-temperature oxidation resistance of the modified passivation film are greatly improved, a new thought and means can be provided for metal surface protection,and application and development of metal materials and ultrathin metal oxide film layers can be greatly promoted.