TH8400B - Cathode ray tubes, their colors and methods of manufacturing them. - Google Patents

Abstract

Exposed cathode ray tube Where there is a coating that contains particles Fineness of Tungsten Oxide And / or Bismuth oxide and binders containing The aluminum formed on the surface of the shadow mask (7) on the side of the electron gun (8).

Claims (2)

1.Colored cathode ray tube consisting of a fluorescent screen, a shadow mask (7) with many channels. That is located in close proximity to the glowing screen and the electron gun that generates an electron beam. It passes through the opening of the shadow mask (7) to activate the luminescent screen, where the shadow mask (7) has a coating (20) with a thickness of 2 to 15 micrometers that is formed on the gun side. The electrons of the shadow mask (7) and contain 15 to 60% fine tungsten oxide and / or bismuth-oxide particles by the measured weight in the coating suspension. And bonding agents that are Aluminum phosphate 2. cathode ray tube according to claim 1, which characterizes that the diameter of the fine particles The presence of tungsten oxide and / or bismuth oxide is 0.2 to 2 μm. 3. Cathode ray tube according to claim 1 or 2, which defines the characteristics that the additional aluminum-phosphate-containing bonding agent does. 4. Cathode ray tube according to claim 3, which characterizes that the content of boron oxide is 10 to 25% by weight of the aluminum oxide content in aluminum phosphate. Claim 1 or 2, which characterizes that the aluminum-phosphate binder is supplemented with aluminum oxide and / or magnesium oxide in an amount equal to 70 to 140% by weight of phosphoric acid. C. In excess of quantities in relative quantities with relative fraction 6. A method for producing a colored cathode ray tube consisting of a fluorescent screen, a shadow mask (7) with a large number of channels. That is located in close proximity to the glowing screen and the electron gun that generates an electron beam. Which passes through the shadow mask cavity (7) to activate the fluorescence screen, whereby the method consists of the suspension preparation process by dispersing fine particles of Tungsten oxide and / or bismuth oxide in an amount of 15 to 60% by weight in an aluminum-phosphate-based filler, coating the suspensions on the surface on the electron gun side of the shadow mask (7 ) To form a coating film And calcination film coating For this reason, a coating (20) with a thickness of 2 to 15 micrometers was formed on the gloss mask (7) 7. Method according to claim 6, which characterizes that the diameter of such fine particles of Tungsten oxide and / or bismuth oxide is 0.2 to 2 μm. 8. Method according to claim 6 or 7, which defines the characteristics that such adhesives contain aluminum phosphate. The addition of boron oxide 9. Claim Method 8, which defines the peculiarity that the content of boron oxide is 10 to 25% by weight of the aluminum oxide content in aluminum phosphate 1 0. Claim Method 6 or 7, which characterizes the peculiarity of the suspension being added With aluminum oxide and / or magnesium oxide in an amount corresponding to 70 to 140% by weight of An excess of phosphoric acid in relative quantities. With relative to aluminum oxide in Aluminum phosphate 1 1. Method for any of the Claims 6 to 10. Which characterizes that the temperature of the calcination The calcification episode is 180 to 600 ํ 1. 2. Method for any of the Claims 6 to 10. Which defines the peculiarity that the time of calcination in the The calcification episode is 30 to 120 minutes.