52results about How to "Improve concentration uniformity" patented technology

The invention discloses a polycrystalline silicon texturing method which comprises low-temperature high-concentration acidizing fluid texturing, normal-temperature low-concentration acidizing fluid, alkali cleaning, ion removal and passivation. The invention provides more a proper acid treatment fluid and a corrosion texturing process for the polycrystalline silicon texturing to ensure that the removal of a mechanical damage layer on the surface of a silicon slice and the texturing are easier to control, can accurately control the texturing degree of the surface of the silicon slice and the thickness reduction of the silicon slice, shorten the texturing time, improve the texturing yield of a battery, reduce the surface reflectivity, increase the light absorption and the short-circuit current, and improve the photo-electricity conversion efficiency of the battery.

The invention provides a mono-trapezoid flow battery, a poly-trapezoid flow battery and an electric pile thereof. Both a cathode porous electrode and an anode porous electrode in the mono-trapezoid flow battery are trapezoidal plate electrodes and are respectively arranged inside a cathode electrolyte flow frame and an anode electrolyte flow frame. On the cathode electrolyte flow frame and the anode electrolyte flow frame, two electrolyte inlet flow paths are arranged nearby the lower bottom edges respectively of the cathode porous electrode and the anode porous electrode, and two electrolyte outlet flow paths are arranged nearby the upper bottom edges respectively of the cathode porous electrode and the anode porous electrode. The electrolyte flows into the cathode porous electrode through the lower bottom edges of the cathode porous electrode and the anode porous electrode and then flows out from the upper bottom edges of the cathode porous electrode and the anode porous electrode. The trapezoid flow battery is reduced in concentration polarization at certain degree and further is reduced in voltage loss, and meanwhile, is improved in utilization efficiency of the electrolyte and is increased in total efficiency.

The invention provides a water pick capable of providing a plurality of water sources, and belongs to the field of water pick structures. The water pick of the invention comprises a casing, a water tank disposed in the casing, and a container disposed at the lower portion of the water tank; a water inlet of the container is connected with a water outlet of the water tank through a solenoid valve;the interior of the container is provided with a water-level detector for detecting the water level of the container, and the bottom of the container is provided with an ozone hydrogen-rich generator;the water pick further comprises a switch knob and a power line disposed at the casing, a PCB disposed in the casing, and a water pump connected with a water outlet of the container; a water outlet of the water pump is connected with a spray nozzle of the water pick through a solenoid valve; and the PCB is connected with the solenoid valves, the switch knob, the power line, the water-level detector, the ozone hydrogen-rich generator, and the water pump. The invention has the beneficial effects that water sources of various properties can be provided for consumers to meet the needs of different users.

The invention provides an annular dilution water addition device which is suitable for a head box of a high speed paper machine. The device includes a header pipe of dilution water, a stepping motor, a dilution water valve, a branch pipe of the dilution water and an annular addition board of the dilution water. The header pipe of the dilution water is respectively connected with a plurality of branch pipes of the dilution water by the dilution water valve, and the dilution water valve is connected with the stepping motor, and a plurality of branch pipes of the dilution water are connected with the annular addition board of the dilution water; the annular addition board of the dilution water consists of a plurality of addition units which are transversely arranged on a dilution water board; the inlet of a water inlet tank is connected with the branch pipe of the dilution water and a plurality of outlets thereof are respectively connected with an annular groove; and the annular groove is positioned at the periphery of a pulp inlet hole and the inner side thereof is connected with the pulp inlet hole by an addition opening. The dilution water enters the annular addition board of the dilution water from the header pipe through the dilution water valve and the branch pipe and is evenly added into the pulp of the corresponding pipe bundle in an annular way so as to ensure that the dilution water in the local area of the addition chamber can be uniformly mixed with the pulp and improve the uniformity of the transverse local quantitative distribution of the paper.

The invention discloses a modified static inhaled toxicant exposure cabinet, comprising cabinet body (1), heater (10)and fan (9)set in the cabinet body (1), which is characterized in that the cabinet body (1)is a cylinder container; sample volatilizing box (6)is set under the cover plate (5); the volatilizing box (6)is a tetrahedron; evaporating dish (8)is set at the bottom and the heater (10)is set at the bottom of evaporating dish (8); the fan (9)is set at one end of volatilizing box (6)and oblique flow guide plate (11)is set at the other end; air outlet port (7)is set near the lower end of flow guide plate (11). The invention not only can improve concentration uniformity of test chemical in cabinet but also shorten testing time. It also saves electric energy and protects circumstance.

The invention discloses a forming method of a semiconductor structure and a forming method of an MOS transistor. The forming method of the semiconductor structure comprises the steps that a semiconductor substrate is provided; a semiconductor layer is formed on the surface of the semiconductor substrate; from the surface of the semiconductor substrate to the surface of the semiconductor layer, the concentration of first impurity ions in the semiconductor layer decreases at first, reaches the lowest concentration, and then increases; and first ion implantation is carried out in the semiconductor layer by using the same impurity ions, wherein the first ion implantation depth is less than the thickness of the semiconductor layer. From the surface of the semiconductor substrate to the surface of the semiconductor layer, the concentration of second impurity ions formed by ion implantation increases at first, and then decreases, while the concentration of the first impurity ions in-situ doped in the semiconductor layer decreases at first, reaches the lowest concentration, and then increases. The uniformity of the overall concentration formed by adding the concentration of the first impurity ions of all depths in the semiconductor layer and the concentration of the second impurity ions is high, which is conducive to improving the electrical properties of the semiconductor structure.

The invention relates to a horizontal directional solidification preparation method of a large-size Re:YAP series laser crystal, which is technologically characterized in that the Re:YAP laser crystal is grown by horizontal directional solidification crystallization under a vacuum condition. The specific growth process comprises six major steps of material melting, seeding, shouldering, equal-width growth, cooling and annealing. The method provided by the invention combines the advantages of a directional crystallization process and a vertical zone-melting process in growing crystals; and the prepared Re:YAP laser crystal has the advantages of higher quality, larger size, higher utilization rate, low defect density, better laser performance, non-doped ion core, low cost, low energy consumption and the like.

The invention provides a refrigerating ice bag, a refrigerant and a preparation method of the refrigerant, and belongs to the technical field of refrigerating articles. The refrigerating ice bag comprises the refrigerant and a bag body. The refrigerant is sealed in the bag body. The refrigerant can be frozen into solid to be used by cooling the refrigerating ice bag. The refrigerant in the refrigerating ice bag has a high cold storage function and is slow in chilling, the initial cooling efficiency is high, and the temperature can be lowered quickly. The cooling effect lasts for a long time, the problem that the refrigerating ice bag is frequently replaced can be greatly reduced, and use cost of the refrigerating ice bag is lowered.

The invention relates to a printer ink feeding device with a refining function. The device comprises a feed box and a feeding mechanism. The feed box is arranged above a work box and provided with a keep-off barrel, a storing cavity is formed between the keep-off barrel and the feed box. The feeding mechanism is arranged between the feed box and the work box and comprises a feeding device and a floating device, the floating device rises and falls along with the rising and falling of the ink surface in the work box and is used for driving the feeding device to match slidingly to the keep-off barrel and controlling the communication between the feed box and the feeding device, so when the ink in the work box is reduced, the ink in the feed box added to the work box is achieved, the amount of the ink in the working box is restored and the ink supply in the feed box to the working box is interrupted. The problems that the printer does not have the function of automatic feeding and refining, the amount of ink in the printer within a reasonable range is always ensured and the feeding ink is uneven in shade are overcome.

The invention relates to a dynamic mixer for a urea-SCR (Selective Catalytic Reduction) system of a diesel engine. The dynamic mixer comprises a rotational flow pipe, an annular baffle, a porous taper pipe and an impeller, wherein the rotational flow pipe, the annular baffle, the porous taper pipe and the impeller are connected in sequence; axially-distributed rotational flow pieces are uniformly arranged on the side wall of the rotational flow pipe; baffle holes are uniformly formed in the annular baffle; taper pipe holes are formed in the wall of the porous taper pipe; impeller blades are uniformly distributed in the radial direction; and the impeller rotates under the action of airflow. the dynamic mixer provided by the invention can effectively reduce the generation of sediments in the urea-SCR system and improve the inlet speed of a catalytic reactor and the concentration uniformity of NH3, so that the conversion efficiency of the catalytic reactor is improved, and meanwhile the influence of the dynamic mixer on the exhaust back pressure of an engine is relatively small; and the mixer is simple in structure, relatively low in manufacturing cost and convenient to install.

The invention discloses roll-dipping equipment for rotor machining and a machining method of the roll-dipping equipment, and relates to the technical field of barrel-plating equipment. The device comprises a tank body, a cleaning tank and a barrel plating tank which are isolated from each other are sequentially formed in the tank body from front to back, a discharging hopper is fixedly installed on the end face of the tank body, a supporting mechanism is fixedly installed on the peripheral side face of the tank body, and two symmetrical driving parts are installed between the opposite surfaces of the tank body and the supporting mechanism; and a roll dipping mechanism is fixedly installed on the bottom face of the supporting mechanism, two pump bodies are installed on the side face of the tank body, and one ends of water inlets of the two pump bodies communicate with the cleaning tank and the barrel plating tank correspondingly. Through the design of the roll dipping mechanism, the device can efficiently complete the roll dipping operation of rotor parts, the device can also realize the pretreatment of rotors in an automatic mode during the roll dipping operation, and through the realization of the pretreatment function, the multifunctionality and the automation degree of the device are effectively improved.

The invention discloses a method for preparing a titanium oxide based ceramic membrane layer on the surface of a light metal or an alloy of the light metal. The method comprises the following step of continuously carrying out anodic plasma discharge oxidation and electrochemical deposition combined process treatment on a workpiece made from the light metal or the alloy of the light metal or a workpiece coated with the light metal or the alloy of the light metal in an electrolytic tank, wherein electrolyte is an acidic solution which contains titanium salt and has a pH value of 1.5-5.0, the electrolyte is controlled at the temperature of 5-35 DEG C, direct current is used in an anodic plasma discharge oxidation stage, and alternating current is used in an electrochemical deposition stage, the current density is 3-10A/dm<2>, the peak voltage of electrochemical deposition is 300-600V, and the treatment time is 0.5-5 minutes. The method disclosed by the invention can be used for preparing the high-quality titanium oxide based ceramic membrane layer on the surface of the light metal or the alloy of the light metal, outstandingly enhancing the property and yield of a product and greatly improving the preparation efficiency.

The invention discloses an instrument adopting medication steam for medical treatment. The instrument comprises a big-end-up squatting portion and a big-end-down mixing portion, a mixing unit in the mixing portion is driven to rotate through a driving spindle to have the medication steam and liquid stirred, a heating unit in the side wall of the mixing portion provides heat, temperature in the mixing portion is monitored through a temperature detection sensor in the bottom wall of the mixing portion, and the temperature detection sensor comprises a metal shell, an input wire, an input conductive piece, an output wire, an output conductive block, a plastic strip and a wax block. By the arrangement, uniformity in concentration of the medication steam can be improved, medical treatment effectis improved, and high adjustability and good automatic control are achieved.

Disclosed is a medicine evaporation method disease treating instrument. An upper main shaft and a lower main shaft inside the instrument drive a left arc pipe, an upper flat pipe, a right arc pipe, alower flat pipe, an inner sub-body and stirring blades to rotate so as to stir disinfecting materials, and therefore the medicine steam and liquid medicine concentration uniform can be improved; airflow ejected through inner and outer vent holes can form vortex so as to enhance the stirring function, and the stirring blades can be driven by rotating strength and the airflow ejected through the vent holes so as to swing around a rotating shaft, a heating device inside the side wall of a liquid medicine bin provides heat, and a temperature measuring sensor inside the bottom wall of the liquid medicine bin monitors the temperature inside the liquid medicine bin. Due to the design, the medicine steam concentration uniformity can be improved, the treatment effect is improved, the adjustabilityis high, and the automatic controllability is good.

The invention discloses an improved static inhalation toxicant exposure cabinet and belongs to the technical field of toxicant exposure cabinets, the improved static inhalation toxicant exposure cabinet comprises a cabinet body and a heater and a fan which are arranged in the cabinet body, the cabinet body is a cylindrical container, a sample volatilization box is arranged at the bottom end of a cover plate of the cabinet body, the sample volatilization box is a tetrahedron, an evaporation pan is arranged at the bottom end of the sample volatilization box, the heater is arranged at the bottom end of the evaporation pan, one end of the sample volatilization box is provided with a fan, the other end of the sample volatilization box is provided with an inclined guide plate, and an air outlet is formed close to the bottom end of the guide plate. By using the improved static inhalation toxicant exposure cabinet, the concentration uniformity of tested chemicals in the cabinet body can be effectively improved, the test time is shortened, the electric energy is saved, and the environment is protected.

A fumigation type gynecological medical device comprises a T-shaped outer frame, an inner heater, a short stirring shaft, a long stirring shaft, an upper rotating shaft, a lower rotating shaft and a steam generation chamber, wherein the T-shaped outer frame, the inner heater, the short stirring shaft and the long stirring shaft in the steam generation chamber are driven by the upper rotating shaftand the lower rotating shaft to stir medicine steam and liquid medicine, so that the concentration uniformity of the medicine steam and the liquid medicine is improved. The internal heater and the heating device in the side wall of the steam generation chamber are used for heating together, the heating uniformity is improved, the temperature in the steam generation chamber is monitored by the temperature sensor in the bottom wall of the steam generation chamber, the temperature sensor comprises a metal shell, an input power line, an output power line, an electrifying block, a left wax block,a right wax block and an insulating platform. In addition, short medicine outlet holes and long medicine outlet holes can achieve on-line medicine supplement, and the concentration of liquid medicineis ensured. By adopting the design, the uniformity of the medicine vapor concentration can be improved, the medical effect can be enhanced, the medicine can be supplemented on line, and the adjustability is high.