DE1196560B - Ferromagnetic ferrite masses - Google Patents
Ferromagnetic ferrite massesInfo
- Publication number
- DE1196560B DE1196560B DEST5933A DEST005933A DE1196560B DE 1196560 B DE1196560 B DE 1196560B DE ST5933 A DEST5933 A DE ST5933A DE ST005933 A DEST005933 A DE ST005933A DE 1196560 B DE1196560 B DE 1196560B
- Authority
- DE
- Germany
- Prior art keywords
- percent
- mole percent
- oxide
- weight
- mno
- 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.)
- Pending
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
- C04B35/42—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 chromites
-
- 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
-
- 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
- C04B35/12—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 chromium oxide
-
- 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
- C04B35/2625—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 magnesium
-
- 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
- C04B35/44—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 aluminates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
Description
Ferromagnetische Ferritmassen Zusatz zum Patent: 976 406 Die vorliegende Erfindung ist eine Weiterbildung der ferromagnetischen Masse nach Patent 976 406, Gegenstand des Patents 976 406 ist die Verwendung eines bei etwa 1200° C oder höher gebrannten Produktes aus etwa 10 bis 20 Gewichtsprozent Magnesiumoxyd, 10 bis 40 Gewichtsprozent MnO, und 50 bis 70 Gewichtsprozent Fe203 als ferromagnetische Masse, insbesondere für geformte Magnetkerne mit einem Verhältnis von Restmagnetismus zu Sättigungsflußdichte von mindestens 0,8.Ferromagnetic ferrite masses Addition to the patent: 976 406 The present one Invention is a further development of the ferromagnetic mass according to patent 976 406, The subject of patent 976 406 is the use of one at about 1200 ° C or higher Fired product made from about 10 to 20 percent by weight of magnesium oxide, 10 to 40 Weight percent MnO, and 50 to 70 weight percent Fe203 as ferromagnetic mass, especially for shaped magnetic cores with a ratio of residual magnetism to Saturation flux density of at least 0.8.
Diese Ferritmassen sind als sogenannte Rechteckferrite besonders wertvoll und sind gekennzeichnet durch einen hohen Widerstand und einen Restmagnetismus, der fast der Sättigungsflußdichte gleichkommt, wodurch ihre Verwendung als Magnetkerne in Rechen- oder magnetischen Speichersystemen besondere Vorteile, z. B. durch hohe Schaltgeschwindigkeit bietet.These ferrite masses are particularly valuable as so-called rectangular ferrites and are characterized by high resistance and residual magnetism, which is almost equal to the saturation flux density, which makes their use as magnetic cores special advantages in computing or magnetic storage systems, e.g. B. by high Switching speed offers.
Gemäß der vorliegenden Erfindung wurde nun gefunden, daß diese wertvollen Eigenschaften, insbesonders hohe Schaltgeschwindigkeit von einer Mikrosekunde oder weniger, sich auch bei Magnesium-Mangan-Ferriten im Anschluß an den im Hauptpatent angegebenen Bereich finden, wenn die Zusammensetzung des gebrannten Produktes 8 bis 24 Molprozent Mg0, 26 bis 77 Molprozent MnO und 15 bis 50 Molprozent, vorzugsweise 25 bis 50 Molprozent, Fe 203 beträgt, also im Eisenuntersuchungsgebiet liegt.According to the present invention it has now been found that these valuable Properties, especially high switching speed of a microsecond or less, also in the case of magnesium-manganese ferrites following the one in the main patent the specified range when the composition of the fired product 8 up to 24 mole percent Mg0, 26 to 77 mole percent MnO and 15 to 50 mole percent, preferably 25 to 50 mole percent, Fe 203, i.e. lies in the iron investigation area.
In der beigefügten Zeichnung ist der Bereich der Zusammensetzung der erfindungsgemäß zu verwendenden Magnesium-Mangan-Ferrite wiedergegeben.In the accompanying drawing the scope of composition is the Magnesium-manganese ferrites to be used according to the invention are shown.
F i g. 1 vergleicht eine rechteckige Hysteresisschleife, die mit einer Masse nach der vorliegenden Erfindung erhalten wurde, mit zwei Hysteresisschleifen von handelsüblichen Ferritmassen. Die rechteckige Schleife ist bei 21 gezeigt. Es ist ersichtlich, daß diese Schleife scharfe Ecken 22 und 23 und gerade Seiten 24 und 251dBIdH hoch) aufweist und daß der Punkt 29, an dem die Schleife die Ypsilonachse (B,.) schneidet, nur wenig niedriger liegt als der Punkt 28 der Sättigungsflußdichte (Bs).F i g. 1 compares a rectangular hysteresis loop with a Mass obtained according to the present invention with two hysteresis loops of commercially available ferrite masses. The rectangular loop is shown at 21. It it can be seen that this loop has sharp corners 22 and 23 and straight sides 24 and 251dBIdH high) and that the point 29 at which the loop is the Y-axis (B ,.) intersects, is only slightly lower than point 28 of the saturation flux density (Bs).
Die Kurve 31 zeigt eine typische andere Hysteresisschleife. Bei Ferriten dieser Art kann das Verhältnis B,IBs noch befriedigend sein, aber die Ecken 32 und 33 sind nicht scharf, und die Seiten weisen eine beträchtliche Abweichung von der Senkrechten auf (dBldH niedrig).Curve 31 shows a typical different hysteresis loop. With ferrites of this type the ratio B, IBs can still be satisfactory, but the corners 32 and 33 are not sharp, and the sides show a considerable deviation from the Perpendicular to (dBldH low).
Die Kurve 44 zeigt wieder eine andere typische Hysteresisschleife mit den Ecken 42 und 43, die scharf genug sind, um die gewünschte Schaltwirkung zu geben und die auch einen ziemlich hohen dB/dH- Wert zeigen, aber in diesem Produkt ist das Verhältnis BTIBBs zu gering. Die Kurven in F i g. 1- sind Wiedergaben oszillographisch aufgenommener Hysteresisschleifen. Die Hauptbedingungen, die ein guter Rechteckferrit erfüllen muß, sind also hohes B,/B,-Verhältnis, Flankensteilheit, scharf ausgebildete Ecken.Curve 44 shows yet another typical hysteresis loop with corners 42 and 43 which are sharp enough to give the desired switching action and which also show a fairly high dB / dH value, but in this product the ratio BTIBBs is too low . The curves in FIG. 1- are reproductions of hysteresis loops recorded on an oscillograph. The main conditions that a good rectangular ferrite must meet are a high B, / B, ratio, flank steepness, sharp corners.
Diese drei Bedingungen sind, wie F i g. 1 zeigt, nur bei Kurve 21. erfüllt.These three conditions are, as shown in FIG. 1 shows only for curve 21. Fulfills.
Um technisch brauchbare Magnesium-Mangan-Ferrite herzustellen, die den obigen Bedingungen entsprechen, d. h. die Hysteresisschleifen mit einem hohen B,/BS Verhältnis, hinlänglicher Steilheit, scharf entwickelten Ecken sowie kurzer Ansprechzeit ergeben, sollen die Werte für die einzelnen Bestandteile im Bereich des Gebietes C39 der F i g. 2 liegen.To produce technically useful magnesium-manganese ferrites that meet the above conditions, d. H. the hysteresis loops with a high B, / BS ratio, sufficient steepness, sharply developed corners as well as short Response time, should be the values for the individual components in the range of area C39 of FIG. 2 lie.
In einem älteren Patent 976 406 des Erfinders ist bereits ein Teil
der in der F i g. 2 gekennzeichneten Gebiete der Ferrite gemäß vorliegender Erfindung
enthalten. Diese werden vom Patentschutz in vorliegender
Sache
ausgenommen. Es handelt sich um das Gebiet zwischen den Punkten 1, 2, 3 und 4 in
Molprozent
Nachstehend sind einzelne spezielle Beispiele wiedergegeben. Für die Herstellung der erfindungsgemäß zu verwendenden Massen ist man nicht auf die genannten drei Rohstoffe beschränkt. Mg0 kann in Form eines Carbonates, die Mangankomponente in Form eines Hydroxydes oder auch als Carbonat eingeführt werden. Ferrioxyd kann durch Ferrihydroxyd ersetzt sein. Nach erfolgtem keramischem Brand können die Massen in jedem Fall als solche des Systems Mg0-MnO-Fez03 gelten.Individual specific examples are given below. For the The preparation of the compositions to be used according to the invention is not limited to those mentioned limited to three raw materials. Mg0 can be in the form of a carbonate, the manganese component be introduced in the form of a hydroxide or as a carbonate. Ferrioxyd can be replaced by ferric hydroxide. After the ceramic firing, the masses can are in any case considered to be those of the Mg0-MnO-Fez03 system.
Beispiel l Eine Masse mit einer Ansprechzeit von etwas mehr als einer
Mikrosekunde enthält z. B.
Beispie14
Es ist ersichtlich, daß die Erfindung neue ferromagnetische Ferritkörper mit ganz einzigartigen und sehr wünschenswerten Eigenschaften schafft. Die Ansprechzeit insbesondere ist besser als bei allen bisher bekannten ferromagnetischen Mässen aus Metallen oder Legierungen, die Ansprechzeiten von der Größenordnung von 25 bis 40 Mikrosekunden haben. Für die Zwecke dieser Beschreibung wird der Begriff der Größenordnung einer Mikrosekunde so verstanden, daß er Ansprechzeiten von 5 oder weniger Mikrosekunden umfaßt.It can be seen that the invention new ferromagnetic ferrite bodies with quite unique and very desirable properties. The response time in particular, it is better than all previously known ferromagnetic measures Made of metals or alloys, the response times of the order of 25 to 40 microseconds. For the purposes of this description, the term On the order of a microsecond understood to mean that it has response times of 5 or less microseconds.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27035152A | 1952-02-07 | 1952-02-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1196560B true DE1196560B (en) | 1965-07-08 |
Family
ID=32735349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEST5933A Pending DE1196560B (en) | 1952-02-07 | 1953-02-06 | Ferromagnetic ferrite masses |
Country Status (6)
Country | Link |
---|---|
CA (1) | CA525699A (en) |
CH (1) | CH328239A (en) |
DE (1) | DE1196560B (en) |
FR (1) | FR1074829A (en) |
GB (1) | GB735375A (en) |
IT (1) | IT527607A (en) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL85826C (en) * | 1954-01-28 | 1957-08-15 | ||
FR1143063A (en) * | 1954-10-18 | 1957-09-26 | Ibm | Composition and manufacturing process of magnetic elements |
DE1010441B (en) * | 1955-03-11 | 1957-06-13 | Steatit Magnesia Ag | Process for improving the magnetic properties of ferrites with a rectangular hysteresis loop |
BE548112A (en) * | 1955-07-01 | |||
US2989474A (en) * | 1955-10-29 | 1961-06-20 | Steatit Magnesia Ag | Ferrite with constricted magnetic hysteresis loop |
US3024196A (en) * | 1955-11-16 | 1962-03-06 | Steatit Magnesia Ag | Ferrite with constricted magnetic hysteresis loop |
US2989477A (en) * | 1955-11-21 | 1961-06-20 | Steatit Magnesia Ag | Ferrite with constricted magnetic hysteresis loop |
US2995517A (en) * | 1956-02-16 | 1961-08-08 | Plessey Co Ltd | Ferrites containing niobium |
US2950252A (en) * | 1956-05-08 | 1960-08-23 | Ibm | Manganese chromium ferrite composition |
US3002930A (en) * | 1956-12-03 | 1961-10-03 | Philips Corp | Process of making a ferromagnetic body |
BE562891A (en) * | 1956-12-14 | |||
US3028336A (en) * | 1957-09-25 | 1962-04-03 | Ibm | Cadmium manganese ferrospinel composition |
US3027327A (en) * | 1957-10-08 | 1962-03-27 | Gen Electric | Preparation of ferromagnetic ferrite materials |
NL95813C (en) * | 1957-10-21 | 1960-11-15 | ||
US3055833A (en) * | 1957-10-31 | 1962-09-25 | Rca Corp | Mixed ferrospinels |
US3006853A (en) * | 1957-12-19 | 1961-10-31 | Ibm | Square loop cadmium-nickel ferrites |
US3096288A (en) * | 1957-12-23 | 1963-07-02 | Union Carbide Corp | Ferri-magnetic spinel bodies |
US3038861A (en) * | 1957-12-27 | 1962-06-12 | Bell Telephone Labor Inc | Polycrystalline garnet materials |
US2982732A (en) * | 1957-12-30 | 1961-05-02 | Ibm | Ferrite composition containing titanium and nickel |
US3034987A (en) * | 1957-12-31 | 1962-05-15 | Rca Corp | Magnetic cores |
US3031406A (en) * | 1958-01-07 | 1962-04-24 | Rca Corp | Magnetic cores |
ES246988A1 (en) * | 1958-02-13 | 1959-05-16 | Itt | Magnetic materials of the high permeability ferrite type |
US2980619A (en) * | 1958-11-28 | 1961-04-18 | Steatite Res Corp | Manganese zinc ferrite containing tungstic oxide |
US3059194A (en) * | 1958-12-29 | 1962-10-16 | Bell Telephone Labor Inc | Microwave ferrite devices |
US3009880A (en) * | 1958-12-31 | 1961-11-21 | Rca Corp | Method for preparing nickel-zinc ferrites |
US3043777A (en) * | 1958-12-31 | 1962-07-10 | Rca Corp | Methods for preparing improved magnetic bodies |
US3042617A (en) * | 1958-12-31 | 1962-07-03 | Rca Corp | Magnetic bodies and methods of preparation thereof |
US2970961A (en) * | 1959-03-04 | 1961-02-07 | Bell Telephone Labor Inc | Magnetic material |
US3007875A (en) * | 1959-06-23 | 1961-11-07 | Steatite Res Corp | Square loop ferrites |
US3042619A (en) * | 1959-12-31 | 1962-07-03 | Ibm | Ferrite composition for bistable magnetic circuits |
US2981688A (en) * | 1960-05-27 | 1961-04-25 | Steatite Res Corp | Ferrites for microwave applications |
US3097979A (en) * | 1960-12-05 | 1963-07-16 | Union Carbide Corp | Magnetic flux-gas shielded metal arc welding |
US3344072A (en) * | 1963-02-28 | 1967-09-26 | Nippon Electric Co | Tantalum doped nickel-zinc ferrite |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2568881A (en) * | 1948-12-28 | 1951-09-25 | Steatite Res Corp | Ceramic parts for electrical devices having magnetic properties and method of making |
DE976406C (en) * | 1951-10-30 | 1963-08-29 | Steatite Res Corp | Using a fired product as a ferromagnetic mass |
-
0
- IT IT527607D patent/IT527607A/it unknown
- CA CA525699A patent/CA525699A/en not_active Expired
-
1953
- 1953-02-05 GB GB330053A patent/GB735375A/en not_active Expired
- 1953-02-05 FR FR1074829D patent/FR1074829A/en not_active Expired
- 1953-02-06 DE DEST5933A patent/DE1196560B/en active Pending
- 1953-05-05 CH CH328239D patent/CH328239A/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2568881A (en) * | 1948-12-28 | 1951-09-25 | Steatite Res Corp | Ceramic parts for electrical devices having magnetic properties and method of making |
DE976406C (en) * | 1951-10-30 | 1963-08-29 | Steatite Res Corp | Using a fired product as a ferromagnetic mass |
Also Published As
Publication number | Publication date |
---|---|
GB735375A (en) | 1955-08-17 |
IT527607A (en) | |
CA525699A (en) | 1956-05-29 |
FR1074829A (en) | 1954-10-08 |
CH328239A (en) | 1958-02-28 |
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