GB1243021A - Method of making orthoferrites - Google Patents
Method of making orthoferritesInfo
- Publication number
- GB1243021A GB1243021A GB39102/68A GB3910268A GB1243021A GB 1243021 A GB1243021 A GB 1243021A GB 39102/68 A GB39102/68 A GB 39102/68A GB 3910268 A GB3910268 A GB 3910268A GB 1243021 A GB1243021 A GB 1243021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature difference
- mass
- crystals
- vessel
- aug
- 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
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000013078 crystal Substances 0.000 abstract 5
- 235000015097 nutrients Nutrition 0.000 abstract 3
- 229910052691 Erbium Inorganic materials 0.000 abstract 2
- 229910052693 Europium Inorganic materials 0.000 abstract 2
- 229910052689 Holmium Inorganic materials 0.000 abstract 2
- 229910052772 Samarium Inorganic materials 0.000 abstract 2
- 229910052769 Ytterbium Inorganic materials 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910052746 lanthanum Inorganic materials 0.000 abstract 2
- 229910052727 yttrium Inorganic materials 0.000 abstract 2
- 229910052684 Cerium Inorganic materials 0.000 abstract 1
- 229910052688 Gadolinium Inorganic materials 0.000 abstract 1
- 229910052777 Praseodymium Inorganic materials 0.000 abstract 1
- -1 Tb Dy Inorganic materials 0.000 abstract 1
- 229910052771 Terbium Inorganic materials 0.000 abstract 1
- 229910052775 Thulium Inorganic materials 0.000 abstract 1
- 230000005290 antiferromagnetic effect Effects 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000007716 flux method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 150000002910 rare earth metals Chemical class 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
- H01F41/24—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates from liquids
- H01F41/28—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates from liquids by liquid phase epitaxy
-
- 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
- C04B35/2675—Other ferrites containing rare earth metals, e.g. rare earth ferrite garnets
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/22—Complex oxides
- C30B29/24—Complex oxides with formula AMeO3, wherein A is a rare earth metal and Me is Fe, Ga, Sc, Cr, Co or Al, e.g. ortho ferrites
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
- C30B7/005—Epitaxial layer growth
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
1,243,021. Rare earth orthoferrites. WESTERN ELECTRIC CO. 15 Aug., 1968 [15 Aug., 1967], No. 39102/68. Heading C1A. [Also in Divisions H1 and H3] Crystals of RFeO 3 (where at least 80% of the R atoms comprise at least one of Y, Sm, Eu, Gd, Tb Dy, Ho, Er, Tm and Yb, and 0-20% of the R atoms comprise at least one of La, Ce, Pr, and Nb) are grown by placing a seed crystal and a nutrient mass in a closed vessel in a 10-25M aqueous solution of KOH, heating the solution to at least 300 C. while under a pressure exceeding the critical pressure, and maintaining a temperature difference between the seed and the mass of at least 5 C. The temperature is preferably 350-425 C., the pressure 8000-35,000 p.s.i., and the temperature difference 10-50 C. The seed crystal is orthorhombic and may be TbAlO 3 ; its orientation is preferably (110) or (001). The nutrient mass may be a mixture of oxides, which may be sintered, or crystals grown by flux methods. The vessel may be Pt lined and may be filled to 70-95% of its volume before heating. A baffle may be placed between the nutrient mass in the bottom of the vessel and the crystals suspended above, to maintain the temperature difference. The + 3 valence state of La and Eu may be maintained by the presence of H 2 and O 2 respectively. In the examples, R was Yb, Sm/Er, Y, Ho, and Tb. The product is antiferromagnetic.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66064367A | 1967-08-15 | 1967-08-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1243021A true GB1243021A (en) | 1971-08-18 |
Family
ID=24650366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB39102/68A Expired GB1243021A (en) | 1967-08-15 | 1968-08-15 | Method of making orthoferrites |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3485759A (en) |
| BE (1) | BE719455A (en) |
| DE (1) | DE1769969A1 (en) |
| FR (1) | FR1603057A (en) |
| GB (1) | GB1243021A (en) |
| NL (1) | NL6811543A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3648260A (en) * | 1969-11-17 | 1972-03-07 | Bell Telephone Labor Inc | Magnetic devices |
| EP1149195B1 (en) | 1998-10-06 | 2007-01-17 | Hills, Inc. | Splittable multicomponent elastomeric fibers |
| CN114890784A (en) * | 2022-04-29 | 2022-08-12 | 广东金绿能科技有限公司 | Ceramic matrix composite and preparation method thereof |
-
1967
- 1967-08-15 US US660643A patent/US3485759A/en not_active Expired - Lifetime
-
1968
- 1968-08-14 DE DE19681769969 patent/DE1769969A1/en active Pending
- 1968-08-14 BE BE719455D patent/BE719455A/xx unknown
- 1968-08-14 NL NL6811543A patent/NL6811543A/xx unknown
- 1968-08-14 FR FR1603057D patent/FR1603057A/fr not_active Expired
- 1968-08-15 GB GB39102/68A patent/GB1243021A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE719455A (en) | 1969-01-16 |
| DE1769969A1 (en) | 1971-11-04 |
| NL6811543A (en) | 1969-02-18 |
| US3485759A (en) | 1969-12-23 |
| FR1603057A (en) | 1971-03-15 |
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