52results about How to "Meet industrial needs" patented technology

The preparation process of intermetallic compound filament with powder core for arc spraying includes the following steps: mixing aluminum powder of granularity 38-44 micron and purity not lower than 99.5 % and iron (nickel ) powder of granularity 53-61 micron and purity not lower than 99.5 % in the atom ratio of 1 to 1; pressing the mixture in a hydraulic press into blank and painting the surface with one thin graphite layer; self-spreading reaction in a vacuum combustor to obtain loose intermetallic compound block; crushing, grinding, sieving to obtain 200-325 mesh granularity powder material and drying; and making Fe (Ni)-Al compound filament with powder core. The present invention has good spraying performance, good coating layer performance, high performance / cost ratio, wide use temperature range, simple technological process and low power consumption.

The invention relates to a method for purifying electronic grade octamethylcyclotetrasiloxane in a rectifying manner. The method comprises the following steps: (1) adding 99% of the octamethylcyclotetrasiloxane into a rectifying tower, and removing little residual hexamethylcyclotrisiloxane (D3 for short) from the top of the tower at 90-96 DEG C under the pressure of 0.02-0.03MPa; (2) enabling the octamethylcyclotetrasiloxane without the D3 to flow out of the tower and enter a reaction kettle of a de-heavy rectifying tower, adding 0.01%-0.1% by weight of a special efficient metal complex ligand, heating to 90-100 DEG C, reacting for 1-10 hours, and performing reduced pressure distillation. The de-heavy rectifying tower is arranged in a superclean room, the reduced pressure operation is adopted in the tower, the pressure of the tower is 0.005-0.01Mpa, the temperature of the top of the tower is 100-110 DEG C, more than 99.99% by weight of the octamethylcyclotetrasiloxane is received, and residues at the bottom of the tower are high-boiling-point impurities; the reaction kettle and the inner wall of the de-heavy rectifying tower and a pipeline receiving container are all wrapped with polytetrafluoroethylene, and fillers of the de-heavy rectifying tower are wrapped with the polytetrafluoroethylene.

The invention relates to a windowing terminal point determining method for a solar energy cell laser back electrode window. According to the method, a back face of a cell is continuously etched for multiple times by utilizing laser with same wavelength and frequency, and the back face of the cell is finally a step-like structure, cell surface resistivity of each step surface is respectively measured, the corresponding relationship between a laser windowing terminal point and the laser thinning times is finally acquired, and thereby the thinning laser repetition times required for etching a back face passivation layer can be acquired. Compared with a traditional method, the back face passivation layer is thinned in a continuous mode, surface resistivity is further measured in a continuous mode, so the detection time is greatly shortened, production efficiency is improved, samples can be acquired through etching, and the state information after each etching can be integrally kept. The windowing terminal point determining method has advantages of simple and easy operation, low cost and relatively high precision.

The invention discloses a wall deposition and wall abrasion loss prediction method based on numerical simulation. The method comprises the following steps of: establishing a grid model, establishing a deposition model, establishing an abrasion model, establishing a fouling thermal resistance model, setting a time amplification factor and the like, namely establishing a granular fouling deposition model from four deposition mechanisms and directly deriving a granular fouling total deposition rate; furthermore, quickly predictingwall surface deposition condition on a heat exchange surface at any time in the future. In the prediction of the wall surface abrasion loss, behaviors of particles are predicted by simulating motion trails of the particles, the abrasion and corrosion conditions of the particles in sewage to a heat exchange wall surface can be accurately simulated, the method has the advantage of high simulation precision, and the actual abrasion result is rapidly and accurately predicted by introducing a time amplification factor; according to the method, the wall surface dirt deposition condition and the wall surface abrasion loss can be predicted, so that the maintenance of heat exchange equipment is timely and effectively guided, and reliable data support and guidance are provided for the design of heat exchange systems.

The invention discloses an iron-based amorphous alloy composite material. The composition of the iron-based amorphous alloy composite material is: FeaAlbGacY3-dVdInxCoyBzSir, wherein a, b, c, d, x, y, z, r are atomic percentages , 70≤a≤76, 3≤b≤5, the value of c is 0 or 2, 0≤d≤3, 0≤x≤1.86, 8≤Co≤10, the value of z is 4 or 8, 0≤r ≤3. The iron-based amorphous alloy composite material of the present invention has excellent high plasticity and soft magnetic properties, its saturation magnetic induction reaches Bs=1.73T, and the density of the bulk amorphous alloy composite material prepared by powder metallurgy reaches 98.7%, the strength is as high as 2.08GPa, the mechanical properties are good, and can meet the needs of the industry. At the same time, the iron-based amorphous alloy composite material of the present invention does not contain expensive rare earth elements, and the demand for the only relatively expensive indium element is also very small, so its The manufacturing cost is not high, the process is not complicated, and it is easy to realize commercial production.

The invention provides a paddle type adsorption air dryer, a system and an air drying method, and relates to the field of air drying. The paddle-type adsorption air dryer includes a ventilation pipe, an isolation frame, a drain pipe and a paddle machine, the isolation frame is arranged in the ventilation pipe, and the isolation frame divides the air passage of the ventilation pipe into upper ventilation pipes. Road and the lower air passage; the drain pipe is arranged on the air pipe and is located on one side of the lower air passage; the blade machine is arranged in the air pipe, and half of the blade machine is located in the The other half of the upper air passage is located in the lower air passage, and the axis of the paddle machine is in the same plane as the isolation frame; a gap is opened on the lower air passage, and the gap is connected with the drain pipe. It is small in size and simple in structure, with a very large air intake. The wind-driven paddle machine is energy-saving and efficient, and can be adjusted according to needs. The drying effect can meet the requirements of different dryness.