GB739371A - Improvements in or relating to the deposition of adherent layers of powdered material on surfaces by a settling process - Google Patents
Improvements in or relating to the deposition of adherent layers of powdered material on surfaces by a settling processInfo
- Publication number
- GB739371A GB739371A GB2844050A GB2844050A GB739371A GB 739371 A GB739371 A GB 739371A GB 2844050 A GB2844050 A GB 2844050A GB 2844050 A GB2844050 A GB 2844050A GB 739371 A GB739371 A GB 739371A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silicate
- powder
- luminescent
- settling
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000001464 adherent effect Effects 0.000 title abstract 3
- 239000012254 powdered material Substances 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 230000008021 deposition Effects 0.000 title 1
- 239000000843 powder Substances 0.000 abstract 7
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 5
- 239000007788 liquid Substances 0.000 abstract 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 239000000243 solution Substances 0.000 abstract 3
- 239000000725 suspension Substances 0.000 abstract 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000006228 supernatant Substances 0.000 abstract 2
- 239000007832 Na2SO4 Substances 0.000 abstract 1
- 239000004111 Potassium silicate Substances 0.000 abstract 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 235000019353 potassium silicate Nutrition 0.000 abstract 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 abstract 1
- 229910052913 potassium silicate Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 1
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 1
- 235000011152 sodium sulphate Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/221—Applying luminescent coatings in continuous layers
- H01J9/223—Applying luminescent coatings in continuous layers by uniformly dispersing of liquid
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Traffic Control Systems (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
A method of forming on a surface, such as the glass end plate of a C.R.T. envelope, an adherent layer of one or more powders p which may be luminescent and which are insoluble or only slightly soluble in water, includes the steps of settling the powdered material on to the surface from suspension in an aqueous solution of a silicate, after completion of the settling heating the settled powder layer and the supernatant liquid to a temperature within the range of 50 DEG to 90 DEG C. for not more than 1 hour, and removing the supernatant liquid when the settled powder layer has become sufficiently adherent. The suspension may contain 10 grs. to 100 grs. of powder per litre, preferably 30 to 40 grs. per litre. The particles of the powder may range from 5 m to 30m in diameter. The powder may consist of luminescent Ag-activated ZnS and/or Ag-activated ZnCdS. The silicte employed may be a potassium silicate containing from 3 to 4 mols. of SiO2 to 1 mol. of K2O. The heating may be carried out slowly by irradiation by one or more infra-red lamps. The aqueous solution of the silicate can include a small proportion of one or more electrolytes, for example Na2SO4 at a concentration of 0.1 mol. per litre of the silicate solution. The surface may be covered to a depth of about 2 inches with the settling liquid containing the silicate and a separately prepared concentrated suspension of the powdered material in water or in a silicate solution then distributed over the surface of the settling liquid. Double and triple layer luminescent screens are also referred to. When the luminescent powder is applied to a C.R.T. the envelope is first washed with a 6 per cent solution of hydrofluoric acid, rinsed with hot water, washed with hot 10 per cent caustic soda, rinsed with hot water and finally rinsed with distilled or de-mineralized water at room temperature. The luminescent screen may be coated with an aluminium backing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2844050A GB739371A (en) | 1950-11-21 | 1950-11-21 | Improvements in or relating to the deposition of adherent layers of powdered material on surfaces by a settling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2844050A GB739371A (en) | 1950-11-21 | 1950-11-21 | Improvements in or relating to the deposition of adherent layers of powdered material on surfaces by a settling process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB739371A true GB739371A (en) | 1955-10-26 |
Family
ID=10275654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2844050A Expired GB739371A (en) | 1950-11-21 | 1950-11-21 | Improvements in or relating to the deposition of adherent layers of powdered material on surfaces by a settling process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB739371A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2206728A (en) * | 1987-06-25 | 1989-01-11 | Sony Corp | Colour cathode ray tubes |
-
1950
- 1950-11-21 GB GB2844050A patent/GB739371A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2206728A (en) * | 1987-06-25 | 1989-01-11 | Sony Corp | Colour cathode ray tubes |
| US4900983A (en) * | 1987-06-25 | 1990-02-13 | Sony Corporation | Cathode ray tube employing index phosphor elements adhered to a color selective electrode |
| GB2206728B (en) * | 1987-06-25 | 1991-09-11 | Sony Corp | Colour cathode ray tubes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2624823A (en) | Electroconductive article | |
| GB533053A (en) | Improved process for the manufacture of glassware and product produced thereby | |
| ES264343A1 (en) | Method of applying an electroconductive tin oxide film and composition therefor | |
| GB1007868A (en) | Improvements in and relating to luminescent glass bodies | |
| GB1396265A (en) | Coloured glass articles | |
| GB739371A (en) | Improvements in or relating to the deposition of adherent layers of powdered material on surfaces by a settling process | |
| US2223924A (en) | Preparation for use in carbon coating television tubes | |
| US1698302A (en) | Coating method | |
| US3736176A (en) | Composition articles prepared therefrom and method of preparing such articles | |
| US3380846A (en) | Matte surface vitreous enamels and articles made therefrom | |
| US2116977A (en) | Fluorescent lamp | |
| GB388716A (en) | Improvements in and relating to the manufacture of glass articles | |
| US2321656A (en) | Enamel coating for ferrous metals | |
| US2556896A (en) | Vitreous enamel slip compositions and method of preparing | |
| GB1465372A (en) | Method of treating the surface of a glass article | |
| US2321657A (en) | Enamel coating for ferrous metals | |
| US2784060A (en) | Process for preparing a potassium silicate solution | |
| US3424605A (en) | Lamp phosphor adherence | |
| US1565598A (en) | Control of the softening temperature of vitreous material | |
| GB708698A (en) | Improvements in or relating to glass which is resistant to attack by alkali metal vapour | |
| US3460967A (en) | Surface treatment of glasses | |
| US1962617A (en) | Manufacture of enamel ware | |
| US1518807A (en) | Process in frosting glass and composition to be used therein | |
| US2212134A (en) | Method of producing luminous tubes | |
| GB453507A (en) | Improvements in and relating to methods of coating surfaces with fluorescent materials |