98results about How to "Improve passivation efficiency" patented technology

The invention discloses a passivator for treating Cd/Pb-polluted soil. The passivator is proportionally composed of biochar, red mud and monoammonium phosphate. When the passivator is in use, a TCLP (toxicity characteristic leaching procedure) process is utilized to evaluate the heavy metal pollution conditions in soil, the weight of the passivator is determined according to the mass ratio of the soil, and the passivator is applied into the soil many times at appropriate time intervals, thereby effectively improving the soil microenvironment. In the slightly alkaline high-reducibility soil, the mobility of Cd and Pb is greatly lowered, and the biochar can absorb abundant Cd and Pb in the soil. The nano red mud has fine particles, contains rich iron aluminum oxides, and can effectively combine Cd-Pd; the applied monoammonium phosphate and red mud further enhance the Cd/Pb adsorptivity, thereby obviously lowering the bioavailable-state Cd/Pb content in the soil, and greatly lowering the Cd/Pb content in crops. Meanwhile, the passivator has high soil environment friendliness, can not generate secondary pollution, and thus, has popularization and application values.

The invention discloses a surface passivation method for a germanium-based MOS device substrate, which belongs to the field of semiconductor material devices. The method comprises the steps of: firstly, washing a semiconductor germanium substrate which is used as a substrate for removing organic, inorganic and metallic granular contaminations on a surface and removing an autoxidation layer on thesurface of the substrate; performing plasma treatment on the substrate through use of silicon fluoride or silicone and fluorin containing hydrogen compound for depositing a silicon passivation layer on the substrate; and finally, after depositing a layer of high-k gate dielectric material, and annealing. The surface passivation method disclosed by the invention has the advantages of greatly reducing the density of an interface state between interfaces of the germanium substrate and the gate dielectric material, effectively restraining the diffusion of the germanium in the substrate into the gate dielectric material, and obviously enhancing the passivation efficiency.

The invention discloses an environment-friendly composite colorful passivating solution and a preparation method thereof and belongs to the technical field of surface treatment of metal materials. Thepassivating solution comprises the components of 17-22 g/L of sodium silicate, 4-8 g/L of sodium molybdate, 6-10 g/L of sodium nitrate, 3-7 mL/L of hydrogen peroxide, 1-3 g/L of potassium fluoride, 2-6 mL/L of nitrilotrimethylene triphosphonic acid, 2-4 g/L of sodium gluconate, 2-4 mL/L of tartaric acid and the balance water, wherein the pH value of the passivating solution is 2.0-2.5. The preparation method of the passivating solution comprises the steps that the sodium silicate, the sodium molybdate, the sodium nitrate, the potassium fluoride, the nitrilotrimethylene triphosphonic acid, thesodium gluconate, the tartaric acid and the hydrogen peroxide are sequentially added into deionized water to be evenly mixed; the water with the constant volume is added to the needed volume; and sulfuric acid is used for adjusting the pH value to be 2.0-2.5, and thus environment-friendly composite colorful passivating solution is obtained. A galvanized layer passivated film treated by the passivating solution is colorful, bright in color, even in film forming and excellent in corrosion resistant performance; the passivating solution does not contain trivalent chromium, hexavalent chromium and other harmful substances and is environmentally friendly, free of pollution, simple in passivating process and high in passivating efficiency, and the corrosion resistance of a film layer is good.

The invention discloses a chromium-free passivation solution. The chromium-free passivation solution comprises the following raw materials in percentage by weight: 20-70% of trisodium phosphate, 1-4% of cobalt sulfate, 1-3% of phosphoric acid, 0.5-0.7% of boracic acid, 1-3% of hydrogen peroxide and 80-200% of water. The passivation solution does not contain chromium and is environment-friendly, and a tin plate passivated by the passivation solution has higher corrosion resistance and oxidization resistance.

The invention discloses a passivation mechanism and method of a diamond cutter. The passivation mechanism comprises a frame, a bracket, a grinding disc, a driving device, a transmission device and a control device, wherein the driving device consists of a motor and a belt pulley; the transmission device consists of a belt pulley and a transmission shaft; a grinding cavity is arranged on the frame (14); an air inlet pipe (9) is arranged on the grinding cavity; the shaft end of the transmission shaft (10), which is fixedly connected with the grinding disc (2), is arranged in the grinding cavity in an extending way; a heater (3) is arranged below the grinding disc; the upper end of the grinding disc can be in contact with the diamond cutter (1) at the bottom end of a clamp (7); the upper end of the clamp extends out of the grinding cavity and is connected with a dynamometric strain gauge (5) arranged on the bracket (4); and optical fiber (6) which is connected with the control device (13) is arranged in the clamp. When the diamond cutter is passivated, the temperature of the grinding disc is 700-900 DEG C; under the atmosphere condition of hydrogen, the rotation speed of the motor is 20-200r/min and the grinding time is 3-20s, and a 3-50mum blade arc can be obtained; and the passivation mechanism and method disclosed by the invention have the advantages of high passivation efficiency, good effect and low cost.

A process for passivating polysilicon and a process for fabricating a polysilicon thin film transistor. A polysilicon layer is formed. Next, high-pressure annealing is performed using a fluorine-containing gas, a chlorine-containing gas, an oxygen-containing gas, a nitrogen-containing gas, or mixtures thereof to passivate the polysilicon layer.

The invention discloses a paddy rice soil heavy metal cadmium sustained-release passivating agent and a use method thereof, and belongs to the field of soil heavy metal pollution control. The paddy rice soil heavy metal cadmium sustained-release passivating agent comprises the following components in parts by mass: 10-15 parts of quick lime, 8-20 parts of an organic fertilizer, 80-125 parts of humic acid, 0.25-0.5 part of potassium thiosulfate, and 40-60 parts of bentonite. The use method comprises the steps: applying calcium oxide and the organic fertilizer to acid contaminated soil, adjusting the pH of the soil to 7.0-8.0, acting for 7-10 days, then adding humic acid, potassium thiosulfate and bentonite to the soil, and acting for 1-2 days, wherein crops can be planted on the obtained soil. The heavy metal cadmium sustained-release passivating agent has high passivation efficiency, has durable and stable sustained-release and passivation effects, and has the function of improving andenhancing soil fertilizer efficiency, and cannot cause secondary pollution; the used materials are low in cost, safe and reliable, and the paddy rice soil heavy metal cadmium sustained-release passivating agent has good social and environmental benefits.

The invention discloses a silicate blue-white passivation solution and a preparation method thereof, and belongs to the technical field of metal material surface treatment. The silicate blue-white passivation solution consists of 26-34g/L of sodium silicate, 2-4g/L malic acid, 8-12g/L sodium fluoride, 9-14mL/L hydrogen peroxide, 8-13mL/L amino trimethylene phosphonic acid and the balance water, and the pH of the silicate blue-white passivation solution is 3.0-3.5. The preparation method of the silicate blue-white passivation solution comprises the steps that sodium silicate, malic acid, sodiumfluoride, amino trimethylene phosphonic acid and hydrogen peroxide are sequentially added to deionized water and are mixed uniformly, water is added for constant volume treatment till the required volume is reached, and the pH is adjusted to 3.0-3.5 by adopting sulfuric acid, thus the silicate blue-white passivation solution is obtained. A zinc coating passivation film after the treatment by thesilicate blue-white passivation solution is blue-white, and is bright in color, the film forming is uniform, and the corrosion resistance is excellent; the silicate blue-white passivation solution isfree of trivalent chromium, sexavalent chrome and other hazardous materials, so that the silicate blue-white passivation solution is environment-friendly and pollution-free; a passivation technology is simple; the passivation efficiency is high; and the film layer corrosion resistance is good.

The invention provides a rigid superhard material precision cutting tool passivating machine, and belongs to the technical field of cutting tool manufacturing. The problem that existing passivating machines are poor in passivating effect is solved. The rigid superhard material precision cutting tool passivating machine comprises a machine base and a servo motor. A machine frame is arranged on the machine base. A columnar rotary plate of which the axis is horizontally arranged is arranged on the machine frame. A plurality of rotary shafts around the axis of the rotary plate are arranged on the rotary plate in a penetrating mode. A clamping is connected to the rotary shaft. The servo motor drives all the rotary shafts to rotate through a driving mechanism. A horizontal guide rail is arranged on the machine base. A supporting plate is arranged on the guide rail. A tubular passivating barrel arranged coaxially with the rotary plate is arranged on the supporting plate. A circle of radial bristle brushes protruding radially is arranged on the inner wall of the passivating barrel. A mounting plate is connected to the end, away from the rotary plate, of the passivating barrel. An annular axial bristle brush protruding axially is arranged on the inner end face, facing the rotary plate, of the mounting plate. The rigid superhard material precision cutting tool passivating machine has the advantages of being low in manufacturing cost, high in rigid superhard material precision cutting tool passivating efficiency and good in passivating effect.

The invention discloses a passivator with a self-repairing function as well as a preparation method and application thereof. According to the method, mixed organosilane is used as a main body passivator, a modified nano container loaded with a repairing agent is used as a nano filler, and sodium alginate is used as an assistant cross-linking agent, so that the surface coating passivation of the pyrite is realized. According to the method, the physical performance and stability of the passivation film can be greatly improved, the passivation film is endowed with a self-repairing function, micropores or microcracks appearing in the passivation film can be self-repaired, and the oxidation rate of pyrite is effectively decreased. Meanwhile, the use amount of organosilane and the use frequencyof the passivator are also reduced, and the tailing pollution treatment cost is reduced.

The invention discloses a copper strip surface passivation device comprising a passivation tank and a passivation solution arranged in the passivation tank, wherein one side of the passivation tank is provided with an inlet for feeding a copper strip, and the other side of the passivation tank is provided with an outlet for discharging a passivated copper strip; and a structure for enabling the copper strip to be in contact with the passivation solution is arranged between the inlet and the outlet in the passivation tank. The device can be used for realizing online passivation treatment, and passivation operation can be continuously carried out if only the copper strip on a production line passes through the passivation tank, so that the passivation efficiency is high; the passivation solution in the passivation tank is circularly filtered through a filter to remove copper powder and other particles entering from the surface of the copper strip to the passivation solution in a passivation process, so that the purity of the passivation solution is ensured, and furthermore, the passivation quality is ensured; and in addition, the passivation solution does not need to be replaced frequently, so that the passivation efficiency is increased, and the cost is reduced.

The invention relates to a method and module for detecting a gas in an excimer laser discharge chamber. The detection module comprises a gas inlet tube, a gas inlet solenoid valve, a gas chamber, a pressure detector, a mass spectrometer, a computer, a vacuum pump, a vacuum pipeline solenoid valve, a halogen gas processor, an inert gas pipeline and an inert gas solenoid valve. The detection of thegas in the excimer laser discharge chamber in the passivation process or the passivation/operation process is realized by the detection module. T The detection method and the module reduce unnecessarytime and energy wastes in the passivation/operation process, and improve the passivation efficiency and the operation effect.

The invention discloses a preparation method of modified remediation plant biochar for cadmium-contaminated soil remediation. The preparation method comprises the following steps: (1) harvesting remediation plants containing a certain concentration of heavy metals, washing, drying, crushing and screening to obtain biomass raw materials; (2) putting the biomass into a tubular furnace in a nitrogenatmosphere for high-temperature carbonization, keeping the pyrolysis temperature at 400-700 DEG C and the retention time at 1-2 hours, cooling to room temperature, and grinding to obtain remediation plant biochar with different pyrolysis temperatures; (3) taking a certain mass of repair plant biochar, flatly laying the repair plant biochar in a glass ware of about 2 mm, and irradiating the repairplant biochar under a 250 W ultraviolet lamp for 8-24 h; and (4) taking out the culture dish after the irradiation is finished to obtain the modified repair plant biochar. The remediation plant biochar prepared by the method is low in toxic leaching amount, has environmental acceptability, and is simple in preparation method, the modified biochar effectively inhibits the effectiveness and mobilityof heavy metals in soil, and dual values of safe disposal and resource reutilization of hazardous wastes are realized.

The invention relates to the technical field of soil heavy metal pollution remediation, in particular to a passivation agent for treating heavy metal pollution of farmland soil and a preparation method thereof. The passivation agent is prepared from, by weight, 1-2 parts of composite bio-organic fertilizer, 0.1-0.2 part of phosphate rock powder and 0.1-0.2 part of attapulgite. The preparation method of the passivation agent comprises the following step that the composite bio-organic fertilizer and the phosphate rock powder are uniformly mixed according to a proportion to obtain the passivationagent for treating the heavy metal pollution of the farmland soil. The passivation agent can effectively reduce the effective-state content of heavy metal in the farmland soil and improve the soil remediation degree and the soil fertility, the passivation effect is long-acting and stable, the preparation method of the passivation agent is simple and efficient, the operation control is convenient,the product quality is stable, and the industrial production is facilitated.

The invention relates to an automatic cutter passivation device, and belongs to the technical field of cutter surface machining. The automatic cutter passivation device is divided into a passivation area, a detection area and a feeding and discharging area. The passivation area comprises a rotating disc, a linkage table, a guide rail, a lifting table, a first motor, a second motor, a transmission shaft, a cutter clamping device, a transmission shaft protection sleeve, a grinding material barrel, a first blast pipe and the like. The detection area comprises a photoelectric sensor, a scanning electron microscope lens and the like. The feeding and discharging area comprises a mechanical arm, a mechanical gripper, a cutter frame and the like. When the automatic cutter passivation device works, a cutter is moved to the three areas through the mechanical arm, the cutter clamping device clamps the cutter in the passivation area and inserts the cutter into the grinding material barrel to passivate the cutter, the requirement for machining different cutter cutting edges is met, the shape of the cutter cutting edges is detected in the detection area, and the cutter is assembled and disassembled in the feeding and discharging area. The automatic cutter passivation device is easy to operate, high in passivation efficiency and high in automation degree, and the passivation precision meets the machining and production requirements.