1892 results about "Laboratory oven" patented technology

An oven for heating and frying food, particularly a rapid cook oven, includes walls and an openable oven door delimiting an oven space and heaters to heat food in the oven space. Such heaters including: microwave radiation devices, a frying plate having an undersurface, and heat circulating-air devices comprising a flow duct for removing circulating air from the oven space and leading it back into the oven space after cleaning, and a fan installed in the flow duct for creating a circulating-air flow in the said flow duct. The oven additionally includes structure delimiting a cooker space, thermal insulation between the oven space and the cooker space and a heater comprising a cooker situated in the cooker space.

The related preparation method for a CuO catalyst contained 1.0-5.0% active carbon carrier comprises: dipping the active carbon in 10% NaOH solution/HNO3 solution for 24h to filter and clean with deionized water till neutrality in turns, drying in oven at 100-110Deg, adding 0.2-0.3mol/L Cu(NO3)2 solution to stir and drop 20% NaHCO3 till much deposition, slaking 24h, filtering, cleaning with deionized water till no separation of metal ion, drying in oven at 100-110Deg, and activating the obtained solid for 2.5h at 270-280Deg.

Methods, ovens, and associated apparatus. Ovens and methods are adapted for maintaining the quality of a pre-cooked food product. Rapid temperature and/or relative humidity restoration may be used. Ovens may include a partition movable to vary sizes of oven cavities. Ovens may include removable interior panels. Humidification mechanisms are adapted for generating water vapor which may be used to maintain the quality of a pre-cooked food product.

An open probe method for sample introduction into a mass spectrometer is disclosed, comprising the steps of: loading a sample holder with sample compounds to be analyzed; heating a probe oven; introducing said sample compounds in said sample holder into said heated probe oven; flowing inert gas into said heated probe oven; vaporizing said sample in said heated probe oven by the combined effect of oven temperature and inert gas flow; entraining said vaporized sample in said inert gas; and, transferring said vaporized sample in inert gas into an ion source of a mass spectrometer; wherein said heated probe oven remains open to the ambient atmosphere during sample introduction and analysis; said inert gas is flowing in said heated probe oven in two directions of a transfer line to a mass spectrometer ion source and to the oven opening; said vaporized sample in inert gas is transferred through a heated transfer line directly into the ionization chamber of an ion source of a mass spectrometer. An apparatus for this method of sample introduction is also disclosed. The primary advantage of this method and apparatus is that the heated probe oven remains open to the ambient atmosphere during sample introduction and analysis thereby enabling faster sample analysis.

The invention relates to a photocatalytic material, and particularly relates to a preparation method of an indium sulfide/carbon nitride composite nano material. The preparation method of the indium sulfide/carbon nitride composite nano material comprises the following steps: weighing g-C3N3 powder, dissolving into purified water, carrying out ultrasonic dispersion uniformly, then adding In(NO3)3.4.5H2O, carrying out magnetic stirring until dissolving completely, dropwise adding the prepared C2H5NS solution, carrying out magnetic stirring, transferring into a reaction kettle with an inner liner made of Teflon, putting into a baking oven, and carrying out hydrothermal reaction; and cleaning and drying to obtain the indium sulfide/carbon nitride composite nano material. The method protects the environment, is efficient, simple, convenient and feasible, and the prepared In2S3/g-C3N4 composite material has a favorable application prospect in the fields of photocatalysis and the like.

A method for regulating a cooking process of a cooking product in an oven of a steamer, during which the moisture in the oven coming from the cooking product is at least periodically determined over time by a moisture sensor. During a measuring phase there is no introduction of steam into the steam oven and the moisture sensor is evaluated. For a given cooking process with fixed times for the supply of steam, on the basis of the moisture sensor evaluation during the measuring phase, the end of cooking is determined. Prior to the measuring phase and during a steam phase, steam is introduced into the oven, the steam supply being terminated following the steam phase and prior to the measuring phase during a ventilating phase. During the ventilating phase the steam concentration in the oven is greatly reduced.

The invention provides a test method of the sulphate content of desulfurization gypsum, comprising the following steps: 3-5 grams of gypsum samples are taken to be heated and dried for 30-60 minutes in a baking oven with the temperature of 42-48 DEG C and then placed into a drier to be cooled to room temperature and weighed by a 1/10000 level balance, the gypsum samples are repeatedly heated and weighed till the gypsum samples have constant weight, and the weight W (g) of the gypsum samples is recorded; the gypsum samples are placed back to the baking oven to be heated and dried for 30-60 minutes under the temperature of 350-370 DEG C and then placed into the drier to be cooled to the room temperature and weighed by the 1/10000 level balance, the gypsum samples are repeatedly heated and weighed till the gypsum samples have constant weight, and the weight W1 (g) of the gypsum samples is recorded; the computation of the crystallization water content of the gypsum samples is as follows: the crystallization water content X(%)=(W-W1)*100/W, and the computation of the sulphate content of the gypsum samples is as follows: the sulphate content is indicated by calcium sulphate dehydrate content, CaSO4.2H2O(%)=X*100/20.9275. The method is simple, convenient and fast; and in addition, compared with the prior art, the invention greatly enhances the analysis speed, simplifies the analysis steps and decreases the experimental apparatus.

The invention provides inorganic adhesive for the aluminum paste of silicon solar cells and a preparation method thereof. The inorganic adhesive comprises the following components by the weight part: 10% to 20% of SiO2, 15% to 30% of B2O3, 5% to 15% of Al2O3, 15% to 35% of Bi2O3, 10% to 18% of ZrO2, 10% to 25% of ZnO and 1% to 8% of MoO with the total amount being 100%. The preparation method comprises the following steps: putting the components forming the inorganic solvent into a mixer to mix the components uniformly; loading the mixed components into a porcelain crucible and placing the porcelain crucible into a baking oven to be dried at the temperature of 120 to 150 DEG C for 3 to 5 hours; then, placing the porcelain crucible into a high-temperature furnace to melt at the temperature of 800 to 1,100 DEG C for melting for 1 to 2 hours; carrying out water-quenching and oven-drying; milling the components with a planetary ball mill until the particle size is lower than 10 mum; and oven-drying the components to obtain the final product of the inorganic adhesive. The glass powder has lower softening temperature and high adhesion when the aluminum paste prepared from the inorganic solvent is used for sintering, so that the aluminum powder layer can be firmly adhered to silicon chips; the expansion coefficient is lower after sintering; the bending degree of cell chips is lower; and the breakage rate is reduced.

The invention relates to the field of reconstituted tobacco preparation, in particular to a method for reducing the content of reducing sugar in reconstituted tobacco, and an application of the method. The method comprises the following steps: adding a mixture material of tobacco stems, tobacco waste and tobacco pieces into hot water of 60-70 DEG C, keeping the temperature, performing solid-liquid separation, and preparing to obtain a tobacco extract liquid; respectively adding EDTA (Ethylene Diamine Tetraacetic Acid), proline, lysine, diammonium hydrogen phosphate and a catalyst into the obtained extract liquid, adjusting the pH value of the reaction liquid till the reaction liquid is faintly acid, stirring for more than 2 hours at the constant temperature of 70-80 DEG C, subsequently performing vacuum concentration, and uniformly applying the concentrated extract liquid onto the front and back sides of a paper substrate; putting the obtained product into a baking oven for baking under the condition of ventilation till the moisture content is 11.5-13.5%, and obtaining a finished reconstituted tobacco product. Compared with that of a thin piece which is not treated by using the technical method, the content of the reducing sugar is reduced by 10-20% on premise that the sensory quality of the product is not affected.

The invention relates to a method for processing plastic floor material by utilizing PVC waste material, including: (1) PVC waste material is cleaned, dried and smashed and is subject to extrusion filtering at 130-150 DEG C by virtue of an extrusion machine, so that impurities are removed, and plasticizer is added, so as to form membrane feed back; (2) PVC resin, plasticizer, stabilizer, foaming agent and filler are added into the membrane feed back, mixing is carried out to obtain mixture, the mixture is subject to banburying at 140-160 DEG C for 150-220s, then is subject to milling at 140-160 DEG C for 3min and then is subject to extrusion filtering at 140-160 DEG C by virtue of the extrusion machine, and the working speed of the extrusion machine is 300r/min, film is made by virtue of a calendaring machine, and film pressing temperature is 130-160 DEG C; (3) the film is compounded onto a surface course coated with wear layer at 170-190 DEG C, heating foaming plasticizing and drying are carried out at 200-220 DEG C by virtue of a baking oven, and then cooling, trimming and crimping are carried out, thus forming the product. The invention utilizes PVC waste material to produce film, the produced film substitutes the blade coating foaming layer in plastic floor production process, production cost is reduced, recycling of waste PVC material is realized, and plentiful natural resources are saved.

The invention relates to a preparation method of ultrathin porous N doped g-C3N4 photocatalyst, and an experiment employs hydro-thermal pretreatment and calcination for preparation. The method concretely comprises the following steps: (1) urea and melamine are added into 50ml of distilled water according to a mol ratio 3:1, stirring is carried out on a constant temperature magnetic stirrer for 30 minutes, a solution is transferred to a 100ml hydrothermal reactor, and the reactor is placed in a baking oven at 180 DEG C and insulation is carried out for 24 hours. (2) natural cooling is carried out to a room temperature, a white substance in the reactor is washed with distilled water for 3-5 times, and drying is carried out (60 DEG C for 10 hours). The dried white substance is grinded and placed in a crucible, and the crucible is placed in a muffle furnace and calcination is carried out at 520 DEG C for 4 hours. The N doped g-C3N4 with an ultrathin porous structure has good photocatalytic hydrogen production, NO gas degradation, and pollutant degradation performance, and oxidation and reductibility are greatly improved; compared with the prior art, N/g-C3N4 with high specific surface area is obtained by using the hydrothermal pretreatment method, raw materials are cheap, the process is simple and green, and the method is suitable for industrialized production of large batch with wide application prospects.

The invention discloses a method for detecting microdefects of quasi monocrystalline silicon sheets. The method includes a manually and mechanically polishing step of manually and mechanically polishing aquasi monocrystalline silicon sheet to be etched and flushing the quasi monocrystalline silicon sheet with deionized water; a chemical etch polishing step of chemically etching and polishing the silicon sheet subjected to the mechanical polishing and rinsing the silicon sheet with deionized water; a preferential microdefect etching step of carrying out preferential microdefect etching on the silicon sheet subjected to the chemically etching and polishing, rinsing the silicon sheet with deionized water and drying the silicon sheet in a baking oven; and a microdefect observation process of carrying out minority carrier lifetime and iron-boron opposite scanning for the etched silicon chip, observing the minority carrier lifetime scanning color distribution by a metallographic microscope, accurately positioning the microdefect positions, classifying the defect types, positioning and cutting the silicon chip into pieces, and marking the pieces. The method is rapid, accurate, energy-saving, environmental-friendly, pollution-free and highly practical.

The invention discloses a plastic-encapsulated power diode and a manufacturing process thereof, and relates to the technical field of semiconductor discrete devices. Its manufacturing process does not adopt the cleaning and dehydration process of organic solvents such as isopropanol and absolute ethanol in the prior art, and the water washing and dehydration process after cleaning with organic solvents is omitted; the chip connected with the wire is put into a heated oven Baking in medium temperature for 4-10 hours, the oven temperature is 200-250°C, and the hydrogen-nitrogen mixed gas or clean air is passed through the oven; put the chip coated with liquid epoxy resin or liquid silicone rubber into the oven at 150±10°C to cure the glue for 10 -60 minutes. Compared with the prior art, the product of the invention has excellent high-temperature characteristics, consistency and reliability.

The invention discloses a manufacturing system of pile coating wall cloth and a method thereof; the system sequentially comprises an unreeling device, a roller guide, a rotary screen gumming machine, an electronics spinning device, a baking oven, a wrap-up device, an unreeling position correcting device and a gumming position correcting device; wherein, the unreeling position correcting device is arranged between the unreeling device and the roller guide, and the gumming position correcting device is positioned between the rotary screen gumming machine and the electronics spinning device. The method comprises: towing force is applied on glass fiber base cloth which is inlaid with colored thread at one side to lead a wound roll of the glass fiber base cloth arranged on an unreeling frame to rotate correspondingly to the unreeling device for unreeling, and then the glass fiber base cloth sequentially passes through an unreeling color control patch sensor of the unreeling position correcting device, the roller guide, the rotary screen gumming machine, a gumming color control patch sensor of the gumming position correcting device, the electronics spinning device and the baking oven to obtain the pile coating wall cloth when moving towards the rear direction; after that, the unreeling operation is carried out on the glass fiber base cloth by the unreeling device. The pile coating wall cloth manufactured by the invention has clear and complete pattern and is in accordance with higher environmental protection requirements.

The invention relates to a method for modifying hydrophobicity of a ceramic membrane, its application and its apparatus. The method comprises the following steps: 1) selecting an organic precursor; 2) preparing a modification solution; 3) pretreating the Al2O3 ceramic membrane, immersing for 8-12 minutes in a NaOH solution (3mol/L), washing by chloroform and deionized water, placing in a baking oven at the temperature of 140-160 DEG C for 0.75-1.25 hours, and cooling to the room temperature; 4) carrying out grafting reaction on the surface of the Al2O3 ceramic membrane; 5) performing heat treatment on the modified Al2O3 ceramic membrane, washing the modification solution on the surface of the modified Al2O3 ceramic membrane by deionized water, and placing in the baking oven of 95-105 DEG C for 11-13 hours to obtain the hydrophobic modified ceramic membrane. One of the greatest use of the membrane is an application in membrane distillation. The invention has the advantages of simple technology, good chemical stability, acid resistance, alkali resistance, organic solvent resistance, large mechanical strength, easy flushing, strong antimicrobial capability, high temperature resistance, narrow aperture distribution, high separation efficiency and the like.

The invention relates to a preparation method for cuprous oxide micron/nano crystal with controllable morphology, relating to the preparation method for the cuprous oxide micron/nano crystal. The invention mainly solves the technical problems of high cost and environmental pollution in the preparation process of the micron/nano cuprous oxide. The method comprises the following steps of: 1, dissolving copper salt into ultrapure water, pouring lactic acid, continuously stirring, regulating a pH value, cooling to the temperature of 25 DEG C, keeping constant volume, measuring the pH value, and obtaining solution A; 2, moving the solution A to a hydrothermal reaction kettle, sealing the reaction kettle, putting the hydrothermal reaction kettle into a drying oven, keeping the temperature, naturally cooling to a room temperature, centrifugally washing by using the ultrapure water, centrifugally washing by using anhydrous ethanol, transferring the reaction kettle onto watch glass, and drying the reaction kettle in the drying oven; and thus obtaining the cuprous oxide micron/nano crystal. The preparation method for the cuprous oxide micron/nano crystal with the controllable morphology has the advantage of simpleness and practicability, simple equipment operation, low raw material price, easy synthesis, less pollution to environment and high synthetic concentration, the problem of the cost of the morphology control and industrialized large-scale synthesis in the prior art is solved, and the industrial production is facilitated.

A glue dipping machine comprises a machine frame, three glue dipping tank assemblies, two drying oven assemblies, four transfer mechanical hand assemblies, three pairs of glue dipping mechanical hand assemblies, and a plurality of workpiece hanging rods. The workpiece hanging rods are each provided with a plurality of hanging points for hanging workpieces; the drying oven assemblies each comprise a drying oven body, a circulation fan and a heat exchanger, the front side and the rear side of each drying oven body are each provided with a upper-and-down moving oven door, and each drying oven body is internally provided with a hanging rod box internal support moving mechanism in front-to-rear direction; parts, at the left side and the right side outside each of the oven doors of the front side and the rear side of each of two drying oven bodies, of the machine frame are each provided with a hanging rod intermittent support moving mechanism in front-to-rear direction. The glue dipping machine is applicable to automatic glue dipping operation of the workpieces, and has high working efficiency. The glue dipping process comprises that the workpieces are successively subjected to three times of glue dipping in the three glue dipping tank assemblies, and drying is carried out for one time respectively after completion of the first time glue dipping and the third glue dipping. The glue dipping process can obtain good glue dipping effect.

The invention belongs to the technical field of a light-emitting nanometer material and provides a one-step rapid controllable preparation method of full-emission fluorescence carbon quantum dots so as to solve the problems that the existing fluorescence carbon dots are single in wavelength and uncontrollable in preparation and the fluorescence quantum efficiency of the carbon quantum dots is low.The method comprises the following steps: modifying any two of amino, carboxyl and hydroxyl on a benzene ring, mixing with absolute ethanol and dissolving ultrasonically and completely to obtain a mixed solution; transferring the mixed solution to a high-pressure reaction kettle and performing high-temperature reaction in a drying oven to obtain a claybank or black solution, namely a full-emission fluorescence carbon quantum dot solution; and flexibly adjusting the type and the proportion of a reaction precursor, the reaction temperature and the reaction time and performing one-step rapid control to obtain the full-emission fluorescence carbon quantum dots. The raw materials are wide in source and low in price, the production equipment is cheap and the universality is high. The prepared full-emission fluorescence carbon quantum dots have high solubility and dispersibility in an aqueous solution and an organic solvent, have high fluorescence quantum efficiency and can be applied to cell marking and imaging.

The invention discloses a method for preparing a spherical titanium oxide niobate anode material in a large scale by utilizing a spray drying method and application thereof to a lithium ion battery. The method comprises: 1, dispersing and dissolving a titanium source and a niobium source in an equal molar ratio in a solvent system, and sufficiently stirring to enable the titanium source and the niobium source to be uniformly dispersed; 2, spraying out the mixed solution in a spray dyer according to a certain flow, and drying obtained powder in an oven to obtain a precursor; 3, calcining the precursor in a high-temperature furnace in the air atmosphere at a temperature of 800 to 1,400 DEG C so as to obtain the spherical TiNb2O7 anode material. The spherical titanium-niobium composite oxide TiNb2O7 prepared by the method has excellent electrochemical performance, and has high coulombic efficiency and reversible capacity and excellent high-rate charge/discharge performance and safety performance when being used as a lithium ion battery anode material. The spherical titanium oxide niobate anode material is low in raw material cost, is non-toxic and harmless, and has a very wide application prospect.

The invention discloses a process for machining a positioning gasket. The process comprises the following steps of: 1, performing finish turning, namely performing the finish turning on an excircle and an inner hole of a raw material until the sizes of the excircle and the inner hole reach design sizes; 2, performing heat treatment; 3, performing wire cutting; 4, grinding, namely clamping a workpiece by using a double-sided grinding fixture, grinding the plane of the workpiece until the size of the workpiece reaches the design size, and keeping depth of parallelism, planeness and surface roughness; 5, performing finish-milling, namely milling positioning holes in the workpiece according to the requirement of a drawing; 6, performing aging, namely keeping the workpiece in a drying oven at the temperature of 140 DEG C for 12 hours; 7, polishing, namely polishing the surface of a part by using a magnetic force polishing machine without bumping and scratching, and demagnetizing the part by using a demagnetizing machine; and 8, packaging for warehousing. Due to the adoption of the process, the positioning gasket can be machined quickly and efficiently and is high in accuracy, the utilization rate of materials is high, cost is saved, and machining efficiency is improved.

The invention relates to a method for preparing active carbon by a mechanical-chemical method. The method comprises the following specific steps of: (1) putting a dried carbon source material into 10 to 70 mass percent of solution of a pure aid in a mass ratio of 3:1-1, uniformly stirring and soaking at room temperature for 2 to 8 hours; (2) charging the material into grinding equipment, continuously grinding until average particle size is between 1 and 2 mu m and thermally treating at the temperature of between 300 and 700 DEG C for 30 to 60 minutes; and (3) washing the treated material with 10 percent solution of hydrochloric acid for 30 minutes, washing with deionized water until pH value is between 6 and 7 and transferring the material into a drying oven for drying after water washing is qualified so as to obtain powder active carbon. The method has the advantages of low reaction temperature, short time and low energy consumption. The prepared active carbon has the advantages of developed micropores, large specific surface area, rich surface functional group, higher pollutant adsorption efficiency, higher environmental compatibility, higher uniformity and low cost, and is convenient to operate and easy to regenerate.