42 results about "Polonium" patented technology

The present invention provides an additive which is able to make a non-aqueous-electrolyte secondary cell or a non-aqueous electrolyte electric double layer capacitor which is excellent in low-temperature characteristics, while maintaining a necessary cell properties, and a non-aqueous-electrolyte secondary cell or a non-aqueous electrolyte electric double layer capacitor that contains therein the additive. The additive contains at least one of tautomers of phosphazene derivatives represented by formulae (1) and (2):wherein R1, R2 and R3 independently represent a monovalent substituent or a halogen element; X represents a substituent containing at least one selected from a group of carbon, silicon, germanium, tin, nitrogen, phosphorus, arsenic, antimony, bismuth, oxygen, sulfur, selenium, tellurium and polonium; and Y1 and Y2 independently represent a divalent connecting group, a divalent element or a single bond.

The invention relates to a concentration detection system used for polonium aerosol inside a reactor workshop. The concentration detection system used for the polonium aerosol inside the reactor workshop is composed of a laser light source (1), an interferometer (2), reactor workshop walls (3), a receiving telescope (4), a photoelectric conversion device (5), corner reflectors (6) and a computer processing system (7). In measurement, lasers sent by the light source are modulated through the interferometer (2) at first, and then are shot into a long-range absorbing light path and reflected and transmitted through a plurality of corner reflectors (6) on the reactor workshop walls (3), and finally are received by the receiving telescope (4), wherein he number of the corner reflectors is determined by the structure of the reactor workshop and the length of the absorbing light path. The photoelectric conversion device (5) converts received optical signals into electrical signals and sends the electrical signals to the computer processing system (7) to generate the Fourier spectrum, and concentration of the polonium aerosol is obtained through calculation. According to the concentration detection system used for the polonium aerosol inside the reactor workshop, rapid and accurate measurement of the polonium aerosol inside the reactor workshop becomes possible, and safety of the inside of the reactor and areas around the reactor is ensured.

The invention provided twin induced plastic steel with a high elongation percentage and a high hole expansion rate and a manufacture method thereof, the steel consists of 0.30 to 0.70 % of carbon, less than or equal to 1.0 % of silicon, 10 to 20% of manganese, less than or equal to 1.0 % of aluminum, 0.005 to 0.20% of polonium, 0.005 to 0.30% of Ra, 0.004 to 0.05% of nitrogen, less than or equal to 0.2% of niobium, less than or equal to 0.3 % of vanadium, less than or equal to 1 of copper and the balance of Fe. The method comprises the following steps of: (1) smelting: smelting by a vacuum furnace, allowing the molten steel to stand for 3-5 min, casting at a casting temperature of 1450-1550 DEG C; (2) hot rolling: heating the casting blank at a temperature of 1150 to 1200 DEG C, with a heating rate of 10-15 DEG C / min, performing heat preservation for 20 to 40 minutes, rolling at an initial rolling temperature of 1150-850 DEG C, stopping rolling at a finishing rolling temperature of 900-600 DEG C, rapidly cooling to room temperature at a rate of more than or equal to 20 DEG C / second after rolling; (3) cold rolling: performing cold rolling with a reduction ratio of the hot rolled plate being 40%-80% ; (4) heat treatment: performing heat treatment at a temperature of 600 to 1000 DEG C, rapidly cooling to room temperature at a rate of more than or equal to 20 DEG C / second after heat preservation for 3 to 10 minutes. The steel of the invention has low cost, a simple method, good quality of the product surface, an excellent processing property and an integrated mechanical property.