Abstract:
A uniformly luminous EL sheet diaphragm and a lighted switch which is of a thin structure, provided with the EL sheet diaphragm, and used in input operating sections of various kinds of electronic devices are disclosed. A diffusion EL sheet comprises a transparent electrode (4) formed on a transparent film (3), a light emitting layer (5), a dielectric layer (6), a rear electrode layer (7) and an insulating layer (8). The EL sheet is formed so that the light emitting side is convex, thus fabricating a diaphragm part (2). A thin switch is produced by forming an electrode contact layer (9) on the insulating layer (8) on the concave side of the diaphragm (2) and an opposed electrode contact layer (11) on an insulating film base (10) opposing the layer (9). The tranparent electrode layer (4) is formed by printing and drying paste prepared by dispersing conductive powder having a visible light transmittance in an insulating resin. A high dielectric constant and flexible resin selected from vinylidene fluoride rubber, and a resin prepared by blending cyanated pullulan or cyanated cellulose and cyanated polyvinyl alcohol is used as the binder resin for the light emitting layer (5) and the dielectric layer (6). Therefore light emission failure due to wire disconnection in the diaphragm part (2) is prevented, providing a high quality EL sheet diaphragm and a switch using the diaphragm.
Abstract:
The conventional cathode for electronic tube has such a problem that the metal constituting the base material of the tube is thermally deformed and the fluctuation of the cut-off voltage becomes relatively large when an electronic tube is operated for a long time. In order to solve this problem, a cathode for electronic tube which can reduce the thermal deformation of the base material and does not allow the large fluctuation of the cut-off voltage is provided. The coefficient of thermal expansion of the metal constituting the base material (1) is made even by mixing the same metal (14) as that of a metallic layer (13) formed on the base material (1) in the metal constituting the base material (1), and the deformation of the base material (1) is suppressed by preventing the diffusion of the metal of the layer (13) to the base material (1).
Abstract:
A cathode ray tube provided with at least one oxide cathode comprising a cathode carrier with a cathode base of a cathode metal and a cathode coating of an electron-emitting material containing a particle-particle composite material of oxide particles of an alkaline earth oxide selected from the group formed by the oxides of calcium, strontium and barium, and oxide particles having a first grain size distribution of an oxide selected from the group formed by the oxides of scandium, yttrium and the lanthanoids, and oxide particles having a second grain size distribution of an oxide selected from the group formed by the oxides of scandium, yttrium and the lanthanoids. The invention also relates to an oxide cathode.
Abstract:
A cathode-ray tube having a high resolution achieved without lowering the electron emission characteristics. A printing paste containing a mixture, in combination, of first particles of needle-like shape and second particles of lump shape both of a carbonate of an alkaline earth metal is used to serve as an electron emitting material. The paste is applied to a metallic base by screen-printing and dried. The resultant base is assembled as an oxide cathode in a cathode-ray tube. To turn the carbonate into an oxide, the tube is evacuated and the cathode is heated. Thus, the surface of the cathode is planarized.
Abstract:
The invention relates to the field of production of barium-scandate dispenser cathodes or other barium-scandate materials. A target (66) containing a mixture of BaO, CaO, Al 2 O 3 and SC 2 O 3 tends to be more stable, the higher the scandia (scandium oxide) content is. However, an increased scandia content results in a reduced emission capability. A destabilizing effect of BaO and CaO reactions is counteracted by the more inert SC 2 O 3 and also AI 2 O 3 components, as not only an increased scandia content stabilizes the material but also an increased alumina (aluminum oxide) content improves the stability.
Abstract translation:本发明涉及钡 - 钪酸盐分配器阴极或其它钡 - 钪酸盐材料的生产领域。 包含BaO,CaO,Al 2 O 3和SC 2 O 3的混合物的靶(66)倾向于更稳定,所述Scandia(钪氧化物)含量越高。 然而,增加的scandia含量会降低排放能力。 BaO和CaO反应的不稳定作用被更为惰性的SC2O3和Al2O3组分所抵消,因为不仅增加了Scandia含量,而且氧化铝(氧化铝)含量的增加也提高了稳定性。
Abstract:
An electron-tube cathode made by forming on the base material an emitter mainly comprising alkaline earth metal oxides prepared by depositing carbonates of alkaline earth metals including at least barium on the base material and pyrolyzing the carbonates in a vacuum, wherein the carbonates comprise a mixture of at least two kinds of alkaline earth metal carbonate crystal grains having different configurations. The cathode is improved in both cut-off variation and emission characteristics and is useful as a cathode of CRTs and a cathode of electron tubes used as electron guns of electron microscopes.
Abstract:
Methods for fabricating refractory metal scandate nanocomposite powders with homogeneous microstructured refractory metal grains and a uniform nanosized dispersion of scandia are provided. The powders prepared by the sol-gel methods have a spherical morphology, a narrow distribution of particle sizes and a very uniform dispersion of nanosized scandia particles joined to the tungsten grains. The powder particle sizes can range from nanometers to micrometers. The powders can be pressed into porous cathode structures that can be impregnated with emissive materials to produce high current density and long life cathodes for high-power terahertz vacuum electron devices. The sol-gel fabrication methods allow control over the materials, particle size, particle composition and pore size and distribution of the cathode structure by manipulation of the process parameters.
Abstract:
The invention relates to a light-emitting device comprising an electrode with a ceramic oxide material, which is brought in to contact with a reducing agent or a precursor thereof. The reducing agent serves to bind the released oxygen and to control the performance of the light-emitting device.
Abstract:
A vacuum tube, in particular a cathode ray tube, equipped with at least one oxide cathode comprising a cathode carrier with a cathode base of a cathode metal and a cathode body with a cathode coating of an electron-emitting material that comprises an alkaline earth oxide, selected from the group formed by the oxides of calcium, strontium and 5 barium, and a sintering inhibitor.