Abstract:
A cathode material of an electron beam device comprising 0.5 to 9.0 % by weight of a rare-earth metal of the cerium group, 0.5 to 15.0 % by weight of tungsten and/or rhenium, 0.5 to 10 % by weight of hafnium and the balance of iridium is provided. Since the cathode material has excellent plasticity, it is easy to manufacture small-size emitters. Also, since the density of the electron emission of the cathode material is high and the working temperature is low, a long lifetime can be ensured. Also, the cathode material is useful as a cathode material of an electron beam device.
Abstract:
PROBLEM TO BE SOLVED: To provide an electrode material for an electric light and its manufacturing method. SOLUTION: An electronic radiation composition includes a barium tantalate composition of a formula (Ba 1-x , Ca x , Sr p , D q ) 6 (Ta 1-y , W y , E t , F u , G v , Ca w ) 2 O ( 11±sigma ). In the formula, sigma is the amount of approximately zero to -3, D is an alkaline earth metal ion or an alkaline earth metal ion, E, F and G are alkaline earth metal ions, alkaline earth metal ions and/or transitional metal ions, x is the amount of maximum about 0.7, y is the amount maximum about 1, p and q are amounts of maximum about 0.3, t is the amount from 0.05 to 0.10, u is the amount of maximum about 0.5, v is the amount of maximum about 0.5, and w is the amount of maximum about 0.25. The manufacturing method of the electronic radiation composition includes a stage in which the barium tantalate composition and a binding agent are blended, and a stage in which the barium tantalate composition having the binding agent is sintered at temperatures from about 1,000°C to about 1,700°C. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
A tungsten wire containing 1 to 10% by mass of rhenium has a point which indicates a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order, wherein the wire diameter of the aforementioned tungsten wire is represented by x mu m, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y% to the fusion current (FC) at the wire diameter x mu m, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the aforementioned wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current. According to the above-described configuration, a tungsten wire having a great elongation even under conditions of high temperature can be provided, and the tungsten wire can exhibit an excellent durability when used as component material for constituting cathode heaters and so forth, and the tungsten wire can be manufactured efficiently.
Abstract:
A tungsten wire containing 1 to 10% by mass of rhenium has a point which indicates a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order, wherein the wire diameter of the aforementioned tungsten wire is represented by x mu m, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y% to the fusion current (FC) at the wire diameter x mu m, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the aforementioned wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current. According to the above-described configuration, a tungsten wire having a great elongation even under conditions of high temperature can be provided, and the tungsten wire can exhibit an excellent durability when used as component material for constituting cathode heaters and so forth, and the tungsten wire can be manufactured efficiently.