GB703746A - Improvements in and relating to separator coatings for magnetic sheet materials - Google Patents
Improvements in and relating to separator coatings for magnetic sheet materialsInfo
- Publication number
- GB703746A GB703746A GB5159/52A GB515952A GB703746A GB 703746 A GB703746 A GB 703746A GB 5159/52 A GB5159/52 A GB 5159/52A GB 515952 A GB515952 A GB 515952A GB 703746 A GB703746 A GB 703746A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl cellulose
- refractory
- slurry
- weight
- per cent
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
- H01F1/18—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets with insulating coating
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Paints Or Removers (AREA)
- Chemical Treatment Of Metals (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
A composition comprises a refractory or semi-refractory powder in a watery slurry with a methyl cellulose binder. The amount of methyl cellulose may be between 0.3 and 2 per cent. by weight of the total slurry, and the refractory material, which may be magnesia, alumina, calcined dolomite, zirconia or silica, is preferably at least 2 per cent. by weight. The methyl cellulose can be dispersed in a portion of the water used at 80 DEG to 90 DEG C., cooled, and the rest of the water and the refractory material added.ALSO:A method of providing magnetic sheet material with a separator coating consists in applying a refractory or semi-refractory powder in a watery slurry and a methyl cellulose binder which latter is decomposed when the thus coated sheet material is annealed thereafter. The amount of methyl cellulose can be between 0.3 and 2 per cent. by weight of the total slurry, and the refractory material, which may be magnesia, alumina, calcined dolomite, zirconia or silica, is preferably at least 2 per cent. by weight. The methyl cellulose can be dispersed in a portion of the water used at 80 DEG to 90 DEG C., cooled, and the rest of the water and the refractory material added. The slurry can be applied thinly and dried slowly at a temperature below 150 DEG C. When the sheet material is annealed the methyl cellulose disintegrates into volatile components. In a modification, colloidal silica is incorporated in a slurry of magnesia or lime, and a silicate is formed at temperatures above 800 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US703746XA | 1951-03-14 | 1951-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB703746A true GB703746A (en) | 1954-02-10 |
Family
ID=22094920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5159/52A Expired GB703746A (en) | 1951-03-14 | 1952-02-27 | Improvements in and relating to separator coatings for magnetic sheet materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB703746A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1044246B (en) * | 1956-08-01 | 1958-11-20 | Gen Electric | Process for the production of a laminated yoke from upright strips of ferromagnetic material |
-
1952
- 1952-02-27 GB GB5159/52A patent/GB703746A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1044246B (en) * | 1956-08-01 | 1958-11-20 | Gen Electric | Process for the production of a laminated yoke from upright strips of ferromagnetic material |
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