US1855562A - Method of insulating bodies - Google Patents
Method of insulating bodies Download PDFInfo
- Publication number
- US1855562A US1855562A US338893A US33889329A US1855562A US 1855562 A US1855562 A US 1855562A US 338893 A US338893 A US 338893A US 33889329 A US33889329 A US 33889329A US 1855562 A US1855562 A US 1855562A
- Authority
- US
- United States
- Prior art keywords
- magnetic
- particles
- bodies
- insulating
- boron
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 8
- 230000005291 magnetic effect Effects 0.000 description 12
- 239000002245 particle Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000000696 magnetic material Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000006249 magnetic particle Substances 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 5
- 150000004678 hydrides Chemical class 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- DSEKYWAQQVUQTP-XEWMWGOFSA-N (2r,4r,4as,6as,6as,6br,8ar,12ar,14as,14bs)-2-hydroxy-4,4a,6a,6b,8a,11,11,14a-octamethyl-2,4,5,6,6a,7,8,9,10,12,12a,13,14,14b-tetradecahydro-1h-picen-3-one Chemical compound C([C@H]1[C@]2(C)CC[C@@]34C)C(C)(C)CC[C@]1(C)CC[C@]2(C)[C@H]4CC[C@@]1(C)[C@H]3C[C@@H](O)C(=O)[C@@H]1C DSEKYWAQQVUQTP-XEWMWGOFSA-N 0.000 description 1
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 1
- 229910010277 boron hydride Inorganic materials 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052990 silicon hydride Inorganic materials 0.000 description 1
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
- H01F1/20—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 particles, e.g. powder
- H01F1/22—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 particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—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 particles, e.g. powder pressed, sintered, or bound together the particles being insulated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
- Y10T29/49076—From comminuted material
Definitions
- This invention relates to electrical insulation, and particularly to the insulation of metal bodies, such as finely divided magnetic particles for use in magnetic cores for loadin coils and the like.
- ilagnetic bodies made from finely divided particles of magnetic material assembled to form a homogeneous body by pressure or the like-in some cases with the aid of an additional binding means, so-called dust cores,
- the objectof the invention is to insulate metal bodies, such as magnetic particles for use in loading coil cores.
- the method consists in applying to the metal bodies or particles, a chemical combination of the desired insulation material, preferably a. gaseous combination thereof, and applying heat thereto so that the insulation material is separated from its chemical combination and is attached to the metal bodies in the form of coatings.
- the coating thus made will adhere firmly to the metal bodies, and may be made of any desired thickness.
- Meta-l bodies t be insulated may be of any suitablekinds, for example, in the case of magnetic dust cores for loading coils, they may comprise iron or an alloy of iron with another metal or metals in suitably finely divided form.
- Suitable insulation materials are boron, silicon or other elements with similar properties, and which may be easily separated from their hydrides, which are thinned in some cases with gases such as hydrogen or nitrogen.
- the insulation materials may be applied to the metal bodies either directly in the form of agas or in the form of a fluid. In the latter case the fluid is changed on heating to'the gaseous form.
- a further insulating layer or protective layer may be produced on the coated bodies by another chemical change as by heatin the 50 coated bodies in an oxidizing atmosphere.
- the coated body comprises a magnetic material such as iron coated with an insulating layer of silicon, or boron by a further application of heat an iron-silicon or iron-boron alloy of high electrical resistance may be obtained on the surfaces of the mag netic bodies.
- the boron or s licon coatings may be oxidized, as by heating 1n an oxidizing atmosphere to form outer insulation layers of B 0 or SiO on the magnetic particles.
- the magnetic. and insulating materials should be selected so as to have substantially the same coeflicients of expansion, as, for example, by using iron as the magnetic materlal and boron sesqui-oxide as the insulating material.
- the method of producing a magnetic core comprising finely divided particles of magnetic material insulated from each other which comprises applying to the surface of each particle of said material a hydride of an insulating material, applying heat thereto to decompose the hydride, and to deposit a coating of said insulating material on said surface, applying to the coated surface a chemical which will react with the coating thereon to form an insulating oxide layer on said surface and then forming the resulting insulated magnetic particles into the desired core form.
- a loading coil core which comprises mixin finely divided 1 particles of a magnetic meta including iron with boron hydride, heating the mixture to decom ose the hydride and to de osit coatings o boron on the magnetic particles, heating the boron coated particles 1n an oxidizing 1 atmosphere to produce outer insulating coatings of boron oxide thereon, and then compressing the coated particles into the desired core form.
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
Description
Patented Apr. 26, 1932 UNITED STATES PATENT OFFICE RICHARD SWINNE, OF BEBLm-STEGLITZ, GERMAN Y, ASSIGNOB TO SIEMENS & HALSKE AKTIENGESELLSCHAIFT, F SIEMENSSTADT, NEAR BERLIN, GERMANY, A. GEBIAN COMPANY METHOD OF INSULATING BODIES No Drawing. Application filed February 9, 1929, Serial No. 338,883, and in Germany February 11, 1928.
This invention relates to electrical insulation, and particularly to the insulation of metal bodies, such as finely divided magnetic particles for use in magnetic cores for loadin coils and the like.
ilagnetic bodies made from finely divided particles of magnetic material assembled to form a homogeneous body by pressure or the like-in some cases with the aid of an additional binding means, so-called dust cores,
are being extensively used as cores for loading coils in telephone lines to improve the transmission characteristics thereof. In such cores it has been found to be necessary 16 or desirable to insulate the magnetic particles from each other to reduce harmful eddycurrentlosses.
The objectof the invention is to insulate metal bodies, such as magnetic particles for use in loading coil cores.
In accordance with the invention, the method consists in applying to the metal bodies or particles, a chemical combination of the desired insulation material, preferably a. gaseous combination thereof, and applying heat thereto so that the insulation material is separated from its chemical combination and is attached to the metal bodies in the form of coatings. The coating thus made will adhere firmly to the metal bodies, and may be made of any desired thickness.
Meta-l bodies t be insulated may be of any suitablekinds, for example, in the case of magnetic dust cores for loading coils, they may comprise iron or an alloy of iron with another metal or metals in suitably finely divided form. Suitable insulation materials are boron, silicon or other elements with similar properties, and which may be easily separated from their hydrides, which are thinned in some cases with gases such as hydrogen or nitrogen. The insulation materials may be applied to the metal bodies either directly in the form of agas or in the form of a fluid. In the latter case the fluid is changed on heating to'the gaseous form.
A further insulating layer or protective layer may be produced on the coated bodies by another chemical change as by heatin the 50 coated bodies in an oxidizing atmosphere.
For example, if the coated body comprises a magnetic material such as iron coated with an insulating layer of silicon, or boron by a further application of heat an iron-silicon or iron-boron alloy of high electrical resistance may be obtained on the surfaces of the mag netic bodies. Also, for example, the boron or s licon coatings may be oxidized, as by heating 1n an oxidizing atmosphere to form outer insulation layers of B 0 or SiO on the magnetic particles.
In order to prevent strains being set up in the finished magnetic body when heat is applied thereto to improve its magnetic prop erties, due to the difierent coefficients of expansion of the magnetic and insulating materials, the magnetic. and insulating materials should be selected so as to have substantially the same coeflicients of expansion, as, for example, by using iron as the magnetic materlal and boron sesqui-oxide as the insulating material.
It may be advantageous also to coat or saturate the finished magnetic body with another protective layer of natural or artificial materials such as, for example, by a compound of ozokerite or the like, by well known processes.
What is claimed is:
1. The method of producing a magnetic core comprising finely divided particles of magnetic material insulated from each other which comprises applying to the surface of each particle of said material a hydride of an insulating material, applying heat thereto to decompose the hydride, and to deposit a coating of said insulating material on said surface, applying to the coated surface a chemical which will react with the coating thereon to form an insulating oxide layer on said surface and then forming the resulting insulated magnetic particles into the desired core form.
2. A method in accordance with that of claim 1 and in which said insulating oxide layer is formed by heating the insulated magnetic material in an oxidizing atmosphere.
3. The process of making a magnetic core which consists in mixing a finely divided magnetic material and silicon hydride, applying heat to the mixture to decompose the hydride 'and to deposit coatings of silicon on the particles of, magnetic material, heating the silicon coated particles in an oxidizing I 5 atmosphere to produce outer insulation la ers of silica. and forming the resulting particles into the desired core form.
4. The process of making a loading coil core which comprises mixin finely divided 1 particles of a magnetic meta including iron with boron hydride, heating the mixture to decom ose the hydride and to de osit coatings o boron on the magnetic particles, heating the boron coated particles 1n an oxidizing 1 atmosphere to produce outer insulating coatings of boron oxide thereon, and then compressing the coated particles into the desired core form.
In witness whereof, I hereunto subscribe my name this 18th da of January, 1929.
RI HARD SWINNE.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1855562X | 1928-02-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1855562A true US1855562A (en) | 1932-04-26 |
Family
ID=7746197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US338893A Expired - Lifetime US1855562A (en) | 1928-02-11 | 1929-02-09 | Method of insulating bodies |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1855562A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2494267A (en) * | 1946-11-26 | 1950-01-10 | Hermann I Schlesinger | Surface hardening of ferrous metals |
| US2528454A (en) * | 1946-11-07 | 1950-10-31 | Hermann I Schlesinger | Coating process |
| US3251719A (en) * | 1962-06-19 | 1966-05-17 | M S A Res Corp | Method of coating metals with a boride |
| US4369076A (en) * | 1980-06-20 | 1983-01-18 | Dainippon Ink & Chemicals Inc. | Process for producing magnetic metal powder |
| US20100123541A1 (en) * | 2008-11-14 | 2010-05-20 | Denso Corporation | Reactor and method of producing the reactor |
-
1929
- 1929-02-09 US US338893A patent/US1855562A/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2528454A (en) * | 1946-11-07 | 1950-10-31 | Hermann I Schlesinger | Coating process |
| US2494267A (en) * | 1946-11-26 | 1950-01-10 | Hermann I Schlesinger | Surface hardening of ferrous metals |
| US3251719A (en) * | 1962-06-19 | 1966-05-17 | M S A Res Corp | Method of coating metals with a boride |
| US4369076A (en) * | 1980-06-20 | 1983-01-18 | Dainippon Ink & Chemicals Inc. | Process for producing magnetic metal powder |
| US20100123541A1 (en) * | 2008-11-14 | 2010-05-20 | Denso Corporation | Reactor and method of producing the reactor |
| US8416044B2 (en) * | 2008-11-14 | 2013-04-09 | Denso Corporation | Reactor and method of producing the reactor |
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