59 results about "Beryllium Powder" patented technology

The invention discloses a powder filling method of a beryllium material forming blank for a CETR. The method includes the steps that 1, a required beryllium powder filling amount is calculated; 2, materials are prepared and loaded into a feeder of a closed feeding device, and the feeder is sealed; 3, a first vibrating motor is started to drive the feeder to vibrate so as to feed beryllium powder into a sheath connected with the feeder in a sealed mode; and 4, a second vibrating motor is started, the vibrating frequency of a vibrating platform is adjusted, and the beryllium powder in the sheathis compacted by vibration, wherein when the filling amount of the beryllium powder is 90-100%, the vibrating frequency is adjusted to 0-80 Hz, when the filling amount of the beryllium powder is 70-90%, the vibrating frequency is adjusted to 80-120 Hz, and when the filling amount of the beryllium powder is 0-70%, the vibrating frequency is adjusted to 120-180 Hz. By means of the method, the tap density and uniformity of the beryllium powder filling the sheath are guaranteed, the compaction performance requirements can be met, and the powder filling efficiency is high.

The invention discloses an aluminium conductive paste for a solar energy battery and a preparation method thereof. The paste comprises the following components: aluminium powder, an inorganic binder, an organic carrier, and a metal additive. The metal powder additive has the median particle diameter D50 of 10 to 150 nm, and is one or more of magnesium powder, beryllium powder and lithium powder. The aluminium conductive paste prepared has high storage stability, is difficult to settle and agglomerate, and does not easily slip through a screen in the screen printing process; after the paste isprinted on the surface of the crystal silicon solar energy battery and sintered, the series resistance of the battery is reduced greatly, and the filling factor is increased; and the average photoelectric conversion efficiency of the monocrystalline silicon solar battery plate is over 17.60 percent.

The invention relates to nuclear engineering and more particularly to controlled reactor start-up. The invention addresses a secondary startup neutron source by creating additional safety barriers between the coolant and the source active part materials. The secondary startup neutron source is designed as a steel enclosure housing an ampule containing antimony in the central enclosure made of a niobium-based alloy unreactive with antimony, with a beryllium powder bed located between the antimony enclosure and the ampule enclosure. An upper gas collector, located above the ampule serves as a compensation volume collecting gaseous fission products. The ampule is supported by a reflector and a bottom gas collector. The gas collectors, reflector, ampule enclosure and washers are made of martensite-ferrite grade steel.

The invention relates to a thermal dissociation reactor, a method for purifying coarse beryllium powder into ingots and a method for preparing ultra-high pure metallic beryllium. The thermal dissociation reactor comprises an iodine containing furnace, a low-temperature reactor and a high-temperature reactor, wherein the iodine containing furnace communicates with the low-temperature reactor, and the low-temperature reactor communicates with the high-temperature reactor. The method for purifying the coarse beryllium powder into the ingots through the thermal dissociation reactor comprises the following steps that the coarse beryllium powder and iodine are reacted in the thermal dissociation reactor, and the mass ratio of the coarse beryllium powder to the iodine is 5:1; beryllium iodide vapor is generated; the beryllium iodide vapor is thermally dissociated and decomposed into metallic beryllium and iodine vapor; collection is carried out to obtain pure beryllium powder; and the pure beryllium powder is smelted into the beryllium ingots in an electron beam smelting furnace. The thermal dissociation reactor is reasonable in structure, simple to assemble and convenient to use; and according to the method for purifying the coarse beryllium powder into the ingots through the thermal dissociation reactor, the operation is simple, the medicament is saved, the energy is saved, the environment is protected, the cost is low, and the purity of the beryllium is extremely high.

The invention discloses a powder filling method for beryllium material forming blanks for CETR reactor, comprising: step 1, calculating the required filling amount of beryllium powder; step 2, preparing the material, loading it into a feeder of a closed feeding device, and sealing it; Step 3, start the first vibration motor, drive the feeder to vibrate and feed the beryllium powder into the package that is sealed with the feeder; Step 4, start the second vibration motor, adjust the vibration frequency of the vibration platform, and correct the The beryllium powder in the package is vibrated; when the beryllium powder loading is 90-100%, the vibration frequency is adjusted between 0-80Hz; when the beryllium powder loading is 70-90%, the vibration frequency is adjusted between 80-80Hz Between 120Hz; when the beryllium powder loading weight is 0-70%, adjust the vibration frequency between 120-180Hz. The invention ensures the tap density and uniformity of the beryllium powder filled in the envelope, can meet the performance requirements of the compact, and has high powder filling efficiency.

The invention belongs to the field of magnesium-aluminum alloys, and particularly relates to a high-strength magnesium-aluminum alloy, which comprises the following raw materials by weight percentage: 6.0-9.7% of aluminum powder, 0.40-0.95% of zinc powder, 0.12-0.45% of manganese powder, copper Powder 0.03~0.05%, silicon powder 0.02~0.06%, iron powder 0.005~0.008%, nickel powder 0.001~0.004%, beryllium powder 0.001~0.003%, rare earth compound and calcium silicate assembly 0.001~0.003%, the rest is magnesium powder. The high-strength magnesium-aluminum alloy prepared by the invention has high strength and low price, and has wide market promotion value.