Color television tube

Television glass Televisions Television tubes, color... 

Yttrium oxide is one of the most important compounds of yttrium and accounts for the largest use. It is widely used in making YVOr europium, and Y2O3 europium phosphors to give the red color in color television tubes. Many hundreds of thousands of pounds are now used in this application. 

Uses. The main appHcation for strontium is in the form of strontium compounds. The carbonate, used in cathode ray tubes (CRTs) for color televisions and color computer monitors, is used both in the manufacturing of the glass envelope of the CRT and in the phosphors which give the color. 

Ultraviolet cross-linking of PVA with dichromates is the basis for its use in photoengraving, screen printing, printed circuit manufacture, and color-television tube manufacture. 

Zinc compounds are generally colorless unless the other component, eg, chromate, is colored. The lack of color of most zinc compounds in visible light is a great advantage in that they do not color paint films, plastics, mbber, cosmetics, etc. However, when excited by various types of radiation and at various temperatures, zinc oxide, sulfide, selenide [1315-09-9], and related compounds exhibit luminescence, ie, they emit colored light (see Luminescent materials). Zinc-based phosphors can be produced in many colors, depending upon the added dopants. They are used in television tubes, luminescent glasses, and various specialty products. 

Silver-colored, ductile metal that is attacked slowly by air and water. The element exhibits interesting magnetic properties. Found in television tubes. Laser material such as YAG (yttrium-aluminum garnet) doped with holmium (as well as chromium and thulium) can be applied in medicine, especially in sensitive eye operations. 

Projection color television tubes where high brightness maintenance is critical... 

Strontium carbonate occurs in nature as mineral strontianite. The compound is used in pyrotechnics and ceramic ferrites. It also is used in making iridescent glass for color television tubes. Other uses are in refining sugar and preparing other strontium salts. 

The oxide is used in phosphors that form red color in color television tubes. Also, it is used in gas mantles and acetylene hghts. Other uses are in yttrium-iron garnets for microwave filters in lasers, and as a stabdizer for high temperature in refractories. 

In contrast to organic chromophores, luminescent lanthanide complexes are believed to be promising candidates to solve this problem. The spectroscopic properties of some lanthanide ions are ideal for use in full color displays, as is known from inorganic luminescent materials in cathode-ray and projection television tubes. Luminescent lanthanide complexes belong to a special class of emitters, exhibiting the following important advantages. 

Gadolinium compounds are used as phosphors in television tubes. A phosphor is a material that shines when struck by electrons. The color of the phosphor depends on the elements of which it is made. 

Samarium looks and behaves like most other metals, but it has relatively few uses. One of the most important is in the manufacture of very powerful magnets. Compounds of samarium are also used to color glass and in television tubes. 

Use Treatment of brines in chlorine-alkali cells to remove sulfates, rodenticide, production of barium salts, ceramic flux, optical glass, case-hardening baths, ferrites, in radiation-resistant glass for color television tubes. 

Use Catalyst, in radiation-resistant glass for color television tubes, ceramic ferrites, pyrotechnics. 

Use With europium vanadate as red phosphor in color television tubes. 

Barium carbonate Barium carbonate (1 1) Barium monocarbonate BE 1 (salt) BW-C3 BW-P C.i. 77099 C.l. Pigment White 10 Carbonic acid, barium salt Carbonic acid, barium salt (1 1) Caswell No, 069 Cl 77099 Cl Pigment White 10 Durex White EINECS 208-167-3 EPA Pesticide Chemical Code 007501 HSDB 950 NSC 83508 Pigment White 10. Used in the treatment of brines in chlorine-alkali cells to remove sulfates, as a rodentlcide, in production of barium salts, ceramic flux, optical glass, case-hardening baths, ferrites, in radiation-resistant glass for color television tubes. White powder mp 811 bp = 1450 d = 4.430 ... 

An important feature in the spectroscopic behavior is that of fluorescence or luminescence of certain lanthanide ions, notably Y and Eu, when used as activators in lanthanide oxide, silicate, or transition-metal oxide lattices. Oxide phosphors are used in color television tubes. Certain of the +2 ions trapped in CaF2 lattices, as well as organic cation salts of complex anions such as [Eu /J-diket4] , show laser activity. 

The current phosphors being used in color-television tubes ire ... 

The acceleration electrode is connected to the high volt e anode ( 30 kV) while the other anode are connected to the electron gun voltage sources. The color television tube operates on the same principle except that three colors of phosphors are used, as shown in 6.6.3.. presented on the next page. This mandates the need for three separate electron guns or means of exciting each color separately from the other colors... 

In the last chapter, we presented a synopsis of the technological advances made in CRT s, particularly those for the color TV tube up to about the mld-1960 s. Since that time, a number of innovations have been accomplished. This change has been in response to market demand for a less bulky display device as well as a larger display size, i.e.- the "flat" television tube. Major improvements have been created in the electron gun, deflection yoke and the glass faceplate. What we are addressing is the changes in t rpe of display which has resulted. In the ordinary CRT of the... 

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