558results about How to "Reduce crystallization" patented technology

A battery charging and/or DC power supply circuitry employs a control circuit through an SCR drive circuit and an MOS drive circuit to control when to turn on/off a semiconductor switch unit and to turn on the semiconductor switch unit while an initial section of each positive half wave of an AC power source and an terminating section of the same are located below a predetermined level for intercepting partial power for charging. While charging a battery, the circuitry is lightweight, small-sized, and to enhance the life of the battery. While being a DC power supply, the circuitry is small-sized, high-efficiency, and low-cost.

A process for fabricating a semiconductor device comprising the step of, after patterning the silicon film crystallized to a low degree by thermally annealing an amorphous silicon film into an island by etching, irradiating an intense light of a visible light or a near infrared radiation to effect a short-period annealing (RTA) to the silicon film of low crystallinity. Thus, the crystallinity of the silicon film is improved and the silicon film is densified in a short-period.

Certain example embodiments relate to seals for glass articles. Certain example embodiments relate to a composition used for sealing an insulted glass unit. In certain example embodiments the composition includes vanadium oxide, barium oxide, zinc oxide, and at least one additional additive. For instance, another additive that is a different metal oxide or different metal chloride may be provided. In certain example embodiments, a composition may be combined with a binder solution that substantially or completely burns out by the time the composition is melted. In certain example embodiments, a CTE filler is included with a frit material. In certain example embodiments, a vacuum insulated glass unit includes first and second glass substrates that are sealed together with a seal that includes the above-described composition.

A core glass and a fiber-optic light guide made from it are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO₂; 18.5-30, ZnO; 8-20, Σ alkali oxides; 0.5-3, La₂O₃; 2-5, ZrO₂; 0.02-5, HfO₂; 2.02-5, ΣZrO₂+HfO₂; 0.4-6, BaO; 0-6, SrO; 0-2, MgO; 0-2, CaO; 0.4-6, Σ alkaline earth oxides; 0.5-3, Li₂O, but no more Li₂O than 25% of the Σ alkali oxides; >58.5, Σ SiO₂+ZrO₂+HfO₂. A molar ratio of Na₂O/K₂O is from 1/1.1 to 1/0.3. A molar ratio of ZnO to BaO is greater than 3.5.

A polyamide composition comprising 50 to 90 parts by weight of (A) semiaromatic polyamides having dicarboxylic acid units containing 60 to 100 mole % of terephthalic acid units and diamine units containing 60 to 100 mole %, in total, of 1,9-nonanediamine units and/or 2-methyl-1,8-octanediamine units, and 50 to 10 parts by weight of (B) aliphatic polyamides in which the average of total carbon atoms of dicarboxylic acid units and diamine units per one amide group is 7 to 12; having excellent moldability, toughness, light-weightness, hot water and steam resistance, heat resistance, mechanical characteristics, low water absorption, chemical resistance and melt stability; and are applicable for molding at low temperature with a conventional steam-heating or a conventional hot-water-heating type mold to give molded articles having sufficient heat resistance, rigidity at high temperature and dimensional stability.

A precise eelctroforming technology by the cathode moving friction method includes such steps as filling hard particles in electrocasting bath, burying the electrocasting core mould in the hard particles, and moving the core mould to make said hard particles to rub and impact the surface of core mould for removing air bubbles and deposited layer, decreasing the thickness of diffused layer and increasing electrocasting speed and quality. Its apparatus is composed of motor, electrocasting bath, partition, liquid tank, magnetic pump, filter, ball valve, overflow valve, temp controller, heater, power supply, conductive device and electroforming processing device composed by transmission, core mould, hard particles and anode.

The invention relates to a manufacturing method for superlow shrinkage type PET industrial yarn, which is characterized in that the superlow shrinkage type PET industrial yarn is manufactured through selecting and controlling cooling conditions, and the technological process is as follows: hyperviscous melting to polyester raw materials, metering, spanning, cooling, oil supplying, stretching, hot shaping, and reeled forming. For lowing the irregularity and shrinkage percentage of fiber, a slow cooling device is arranged in the production of industrial yarn, a precooling device adopted is a hollow stepped ring-shaped belt comprising an upper part and a lower part, through holes with the diameters of 5 to 7 mm are uniformly distributed in the upper part of the ring-shaped belt, through holes with the diameters of 3 to 4 mm are uniformly distributed in the lower part, and the hole arrangement densities are the same. The natural target of the PET industrial yarn is as follows: the fracture strength is equal or greater than 7.0 cN/dtex, the breaking elongation is 20.0 plus or minus 1.5 percent, and the dry heat shrinkage percentage under the test conditions of 170 DEGC, 0.05cN/dtex reaches 1.9 plus or minus 0.25 percent.

The invention provides a method for preparing a ceramic particle reinforced steel-based mesh material, which comprises: forming a mixture of hard ceramic particles and alloy powder into strip blocks by powder sintering or by using and adhesive; joining the strip blocks into a corresponding mesh structure or joining and overlapping the strip blocks into mesh three-dimensional framework structure; and performing normal sand casting or lost foam casting, namely melting a substrate metal material, pouring the molten substrate metal material in a molding cavity, allowing the molten substrate metal material to cool and condense at room temperature, removing sand and obtaining the ceramic particle reinforced steel-based mesh material. The obtained ceramic particle reinforced steel-based mesh material gives full play to the high wear resistance of the ceramic particle hard phase and the toughness of the steel base; and the method with convenience for regulation and reliable process solves the problem of incomplete reaction of the composite material, nonuniform reinforcing phase particle distribution, pollution weakening on a reinforcing phase interface and the like and is used in wear resistance fields of mines, power, metallurgy, coal, building materials and the like.

The invention provides a high-performance 3D (Three Dimensional) printing supply alloy material. The high-performance 3D printing supply alloy material comprises, in parts by weight, 20.0-50.0 parts of polylactic acid, 50.0-80.0 parts of high impact polystyrene, 0.1-5.0 parts of compatilizer and 0.2-3.0 parts of auxiliaries, wherein the compatilizer comprises one or more than two, matched with each other in use, of a maleic anhydride grafted high polymer, a terpolymer copolymerized with styrene, acrylonitrile and glycidyl methacrylate (SAG), and a terpolymer copolymerized with methyl methacrylate, butadiene and a styrol copolymer (MBS). The high-performance 3D printing supply alloy plastics prepared from the high-performance 3D printing supply alloy material are non-toxic, low-carbon and environment-friendly, low in alloy material cost, excellent in combination properties, and very high in economic value and wide in market prospect.

The invention discloses a self-microemulsion and a preparation method thereof, relates to a microemulsion and provides the self-microemulsion with the advantages of wide regional applicability, stable transmission, wide temperature range, high oil carrying amount and transparency as well as the preparation method thereof. The self-microemulsion consists of the following components in parts by mass: 10-40 parts of oil phase, 0-5 parts of oil phase emulsifying agent, 20-40 parts of main body emulsifying agent, 20-50 parts of assisted emulsifying agent, 5-15 parts of aqueous media, 0-2 parts of functional additive and 20-40 parts of main body emulsifying agent. The preparation method comprises the following steps of: feeding oil-soluble products into stirring equipment; adding carried oil and the oil phase emulsifying agent; mixing and heating the mixture until the mixture is dissolved for later use; adding the main body emulsifying agent, the assisted emulsifying agent, the aqueous media and the functional substance in another stirring equipment; stirring, mixing and heating the mixer until the mixture is dissolved for later use; and adding the dissolved aqueous phase in an oil phase vessel, stirring until the emulsion is transparent and cooling to be normal temperature to obtain a product.

The invention relates to a process for treating a tail gas, in particular to a process for treating a residual liquid and a tail gas in polysilicon production by an improved Siemens method. The invention provides a process for treating the residual liquid and the tail gas in polysilicon production by the improved Siemens method, which is difficult to block a pipeline. The process comprises the following steps of: carrying out neutralization reaction on the high-boiling substance residual liquid, the chlorosilane tail gas and eluent; emptying the gas after the neutralization reaction; treating the liquid after the neutralization reaction to neutrality and then carrying out harmless treatment, wherein the eluent is lime milk with the volume percentage of 10-30 percent. When the lime milk eluent of the process is used, calcium chloride is slowly crystallized, and crystals are quite loose, are easy to clean and can not block the pipeline; compared with sodium hydroxide, 8-10 percent of eluent can be saved, and the production cost is saved.

A transistor includes a substrate, an active region including a source region, a channel region, and a drain region which are crystallized using an SGS crystallization method and are formed on the substrate so that a grain size of a first annealed portion and a second annealed portion are different from each other, a gate insulating layer formed on the active region, and a gate electrode formed on the gate insulating layer.

The invention relates to a method of increasing the oxidation stability of biodiesel, which comprises adding a primary antioxidant having a melting point of less than or equal to 40° C. to the biodiesel to be stabilized in an amount of from 10 to 20 000 ppm (w/w), where the primary antioxidant comprises at least one compound having the structure

where:

• • R₁, R₂=hydrogen, a linear alkyl group having from 1 to 20 carbon atoms or

where * is a carbon atom of the aromatic ring system,

R₃, R₅=hydrogen, a linear alkyl group having from 1 to 20 carbon atoms,

R₄=hydrogen, a linear alkyl group having from 1 to 40 carbon atoms,

where both the substituents of the type R₁ and R₂ and those of the type R₃ and R₅ are in each case identical or different.

The invention relates to a honey processing process. The honey processing process is characterized by comprising the following steps: (1) raw honey inspection; (2) (a) melting, wherein the heating temperature is 45-60 DEG C, and the heating time is 30-60 minutes or 4-8 hours according to the state of raw honey; (b) filtration, namely carrying out pressure filtration in a sealing device at the temperature higher than 40 DEG C so as to remove impurities and larger crystals; (3) vacuum concentration; (4) cooling. According to the honey processing process, the filtration step sequentially comprises rough filtration, fine filtration and refined filtration, wherein the temperature of the fine filtration is higher than that of the rough filtration, and the temperature of the refined filtration is higher than that of the fine filtration. The different processing time can be set according to different states of the raw honey, so that the pertinence is strong, not only can melting quality and the smooth operation of subsequent steps be guaranteed, but also the efficiency is increased, and the unnecessary time waste is reduced; besides, the filtration is performed three times, and the filtering temperatures are different, so that the efficiencies of each filtration process and the whole filtration are increased, and the purity of finished honey is improved.

The invention discloses a hybrid unit of an SCR (selective catalytic reduction) system for vehicle urea, comprising a pipe body, a hybrid unit rib device and a nozzle, wherein the nozzle is aslant arranged on the wall surface of the pipe body; the hybrid unit rib device tightly abuts against the nozzle and is installed on the front end of the nozzle; the hybrid unit rib device comprises four ribs, the middle of the first rib and the second rib forms a fluid path similar to an atomizing pattern; the first rib and the second rib have certain gradient and twists towards the central area; the third rib has a baffle-shaped structure and is arranged near the pipe wall, the installation direction is vertical to the atomizing axis, and the third rib twists towards the wall surface; and the fourth rib is arranged along the atomizing axis direction and is composed of a group of blades alternately twisted left and right. The invention can bring the effect that a urea aqueous solution injected by the nozzle and tail gas are fully mixed before entering an SCR catalytic converter, thus reducing urea crystallization formed on the wall surface; and meanwhile, the hybrid unit has compact structure and is easy to process and install, and the effect of the hybrid unit is verified.

The invention discloses a method for preparing a composite antiwear guide plate, which comprises the following steps: alloy dust core bars are bound into bundles and arranged in a guide plate casting mould cavity, and the volume of the alloy dust core bars accounts for 20 to 60 percent of the total volume of the guide plate; molten matrix metal is cast into the guide plate casting mould cavity, the alloy dust core bars are melted and dissolved under the heat effect of the matrix metal, a great number of alloy elements and the molten matrix metal generate metallurgical combination reaction so as to generate a highly dispersed alloy structure on the original position; and finally the alloy structure is cooled and solidified, and the bar-shaped hard phase is metallurgically and transitionally combined into a whole with the matrix metal, thereby preparing the composite guide plate which takes the high-strength and high-ductility metal as the matrix and contains a certain number of metallurgically combined bar-shaped hard points. The composite anti-wear guide plate has high strength and high ductility of the matrix metal and high hardness and high wear resistance of the hard phase, can simultaneously bear high pressure and strong wear, and has the characteristics of long service life, low price, simple preparation and so on.

A method of making a foam glass preparation is provided. The following are mixed together: powdered or ground glass, at least one non-sulfur based foaming agent, and at least one additive that reduces the crystalline silica content in the foam glass derived from the preparation to less than 1% (volume basis).

The present invention relates to tough and ductile biodegradable, aliphatic polyester blend compositions and methods for preparing such compositions. It relates to products made out of such blend compositions, including, but not limited to, films, fibers, nonwovens, sheets, coatings, binders, foams and molded products for packaging. The products exhibit a desirable combination of high strength, ductility and toughness, while maintaining flexibility, biodegradability and compostability. The products are useful for a variety of biodegradable articles, such as diaper topsheets, diaper backsheets, disposable wipes, shopping and lawn/leaf bags, agricultural films, disposable garments, medical disposables, paper coatings, biodegradable packaging, binders for cellulose fibers or synthetics, and the like. The polyester blend of the present invention comprises: (a) a copolymer comprising two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure: wherein R<1 >is H, or C1 or C2 alkyl, and n is 1 or 2. The second RRMU comprises at least one monomer selected from the group consisting of the structures (II) and (III): wherein R<2 >is a C3-C19 alkyl or C3-C19 alkenyl, and wherein m is from 2 to about 16; wherein at least about 50 mole % of the copolymer comprises RRMUs having the structure of the first RRMU of formula (I). and wherein the polyhydroxyalkanoate is present at a level of at least about 20%, by weight, of the total of the polyhydroxyalkanoate and the aliphatic ester polycondensate. wherein R<1 >is H or a C1-2 alkyl and n is 1 or 2; and the second randomly repeating monomer unit has the structure: wherein R<2 >is a C3-19 alkyl or alkenyl; and (b) an aliphatic ester polycondensate synthesized from an aliphatic polyhydric alcohol and an aliphatic polycarboxylic acid compound.

The invention relates to a polyurethane foam two-component raw material in compounds in the field of chemistry and a construction method thereof, and particularly relates to a polyurethane foam two-component raw material suitable for construction in autumn and winter for hydraulic concrete dam insulation engineering and the repair of cracks in a low temperature cold storage. The polyurethane foam two-component raw material comprises an isocyanate component and a polyol component, wherein the polyol component contains low-temperature and highly active polyether polyol which accounts for 15-45% of the total weight of the polyol component, the polyol component contains a physical foaming agent having a boiling point not higher than the construction temperature of 20 DEG C and accounting for 5-25% of the total weight of the polyol component, the isocyanate component is polymethylene polyphenyl isocyanate, a viscosity reducer, which accounts for 5-25% of the weight of polymethylene polyphenyl isocyanate, is added into polymethylene polyphenyl isocyanate and the viscosity of the polymethylene polyphenyl isocyanate is reduced to 100cps or less after the addition of the viscosity reducer. The polyurethane foam two-component raw material disclosed by the invention can be normally constructed at -30 DEG C and above ambient temperature.

The invention relates to a lead-free glass powder for silver paste on the back of a crystalline silicon solar cell and a preparation method thereof. The lead-free glass powder comprises the following raw materials in parts by weight: 40-70 parts of Bi2O3, 5-15 parts of B2O3, 0.5-5 parts of ZrO2, 10-20 parts of SiO2, 5-20 parts of ZnO, 1-5 parts of TiO2, 5-20 parts of Al2O3 and 1 part of P2O5. The preparation method comprises the following steps of: placing the raw materials in a mixer, and uniformly mixing to form a mixture; preheating a quartz crucible to 600-800 DEG C, placing the mixture in the quartz crucible and carrying out heat preservation for 20 minutes; then smelting for 20 minutes to 40 minutes at 900-1200 DEG C; pouring molten glass into deionized water for quenching, carrying out wet-process ball milling on the quenched glass to 2-5mu m, and drying to obtain the lead-free glass powder. The lead-free glass powder has the advantages that the technological process is simple, time consumption for smelting is short and cost is low; when in use, the lead-free glass powder has good wettability with silver powder and a silicon substrate; and after the lead-free glass powder is sintered, the adhesive force between the lead-free glass powder and the silicon substrate is above 5N.

The present invention generally relates to pharmaceutical compositions for the treatment of various diseases and disorders, in particular the use of novel complexes of amine drugs with polyacrylic acid carbomer polymers. The compositions of the present invention can be administered transdermally or transmucosally to patients in need thereof for a systemic or for a local therapeutic effect. The compositions of the present invention present the additional benefits of being free or substantially free of excipients which may potentially be responsible for skin local reactions and unpleasant smell.