Abstract:
A radiation sensor and a method for measuring steel-sheet thickness are provided to secure high measuring sensitivity with less amount of inert gas by improving drift speed of ionized gas ions and electrons inside the ion chamber. A radiation sensor for measuring steel-sheet thickness comprises a metal ion chamber(11), a radiation input unit(13), a high voltage metal electrode(15), a ceramic support supporting bolt, a metal collecting electrode(12) and a signal processing unit. The metal ion chamber is filled with inert gas. The radiation input unit is located on a radiation incidence surface of the ion chamber. The high voltage metal electrode is installed on the inner wall side of the ion chamber not to be in contact with the inner wall. The ceramic support supporting bolt supports the high voltage metal electrode. The metal collecting electrode and the signal processing unit are installed inside the ion chamber.
Abstract:
PURPOSE: A method is provided to obtain a sintered body having a superior thermal stability that exhibits no changes in density and organization after the re-sintering process. CONSTITUTION: A method is characterized in that a zinc stearate is used as a lubricant or an agent for forming air pores, and the zinc stearate is removed by the dewaxing process where the mixed nuclear fuel compressed powder is heated for 1 to 3 hours at the temperature of 800 to 900 Deg.C under a reducing atmosphere using a dewaxing furnace prior to an oxidation sintering process in case of sintering the compressed powder by using a continuous sintering furnace.
Abstract:
PURPOSE: A method is provided to obtain a sintered body having a superior thermal stability that exhibits no changes in density and organization after the re-sintering process. CONSTITUTION: A method is characterized in that a zinc stearate is used as a lubricant or an agent for forming air pores, and the zinc stearate is removed by the dewaxing process where the mixed nuclear fuel compressed powder is heated for 1 to 3 hours at the temperature of 800 to 900 Deg.C under a reducing atmosphere using a dewaxing furnace prior to an oxidation sintering process in case of sintering the compressed powder by using a continuous sintering furnace.
Abstract:
PURPOSE: A dry attrition mill of the continuation type is provided to acquire a powder that has good sintering by mixing an addition agent with dioxide uranium. CONSTITUTION: An upper jar(21) includes a power input(4) and an upper cover(7). The upper cover(7) is inserted into the internal of the upper jar(21), and the power input(4) is formed at the upper of the upper cover(7). A lower jar(22) is coupled at the lower of the upper jar(21), and is inserted into the internal of therein. A ball valve(3) is coupled at the lower of the lower jar(22). A grids(6,6') are installed at between the upper jar(21) and the lower jar(22), between the lower jar(22) and the ball valve(3) in order to pass the powder. An impeller(1) passes through the center of the upper cover(7), the upper jar(21), grids(6,6') and the lower jar(22) in regular sequence. A cooling water tank(5) is installed at the wall of the upper jar(21) and the lower jar(22). A power spool is positioned at the ball valve(3).