GB1291020A - Improvements in or relating to ring-cores for switching or storage purposes - Google Patents
Improvements in or relating to ring-cores for switching or storage purposesInfo
- Publication number
- GB1291020A GB1291020A GB2138371A GB2138371A GB1291020A GB 1291020 A GB1291020 A GB 1291020A GB 2138371 A GB2138371 A GB 2138371A GB 2138371 A GB2138371 A GB 2138371A GB 1291020 A GB1291020 A GB 1291020A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressing
- cores
- mol
- per cent
- heating
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
- C04B35/2616—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing lithium
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/2691—Other ferrites containing alkaline metals
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
Abstract
1291020 Ferrite cores SIEMENS AG 19 April 1971 [13 Feb 1970] 21383/71 Heading H1N A switching or storage ring core of lithiummanganese-chromium ferrite has the starting material composition: 79-82 mol. per cent Fe 2 O 3 ; 15-17 mol. per cent Li 2 O 3 ; 1-6 mol. per cent Cr 2 O 3 and MnO together. The cores may be made by making a pressing of the above oxides in the above properties, heating the pressing in an inert atmosphere, e.g. N 2 , in a furnace at 100-200‹ C. below a predetermined sintering temperature, heating the pressing at this temperature, e.g. 980‹ C. in an oxidizing atmosphere, e.g. O 2 , heating the pressing to the predetermined sintering temperature, e.g. 1120‹ C., cooling the pressing to 100-300‹ C. below this sintering temperature annealing the pressing at this temperature, and finally removing the pressing from the furnace in an inert, e.g. N 2 , atmosphere. The powdered oxides may be presintered before pressing. Examples describe the preparation of 0À8 mm. external diameter annular cores from oxide mixtures containing 0À33, 0À66 and 0À99 mol. per cent Cr 2 O 3 .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702006712 DE2006712B2 (en) | 1970-02-13 | 1970-02-13 | Switching or storage ring core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1291020A true GB1291020A (en) | 1972-09-27 |
Family
ID=5762228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2138371A Expired GB1291020A (en) | 1970-02-13 | 1971-04-19 | Improvements in or relating to ring-cores for switching or storage purposes |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2006712B2 (en) |
| FR (1) | FR2078515A5 (en) |
| GB (1) | GB1291020A (en) |
| NL (1) | NL7101922A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116854459A (en) * | 2023-05-19 | 2023-10-10 | 江苏阜宁海天金宁三环电子有限公司 | High-frequency high-impedance lean iron-manganese-zinc ferrite and preparation method thereof |
-
1970
- 1970-02-13 DE DE19702006712 patent/DE2006712B2/en active Granted
-
1971
- 1971-02-12 NL NL7101922A patent/NL7101922A/xx unknown
- 1971-02-12 FR FR7104731A patent/FR2078515A5/fr not_active Expired
- 1971-04-19 GB GB2138371A patent/GB1291020A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116854459A (en) * | 2023-05-19 | 2023-10-10 | 江苏阜宁海天金宁三环电子有限公司 | High-frequency high-impedance lean iron-manganese-zinc ferrite and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2078515A5 (en) | 1971-11-05 |
| DE2006712B2 (en) | 1974-08-15 |
| DE2006712A1 (en) | 1971-08-19 |
| NL7101922A (en) | 1971-08-17 |
| DE2006712C3 (en) | 1975-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |