US4606846A
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Mixed rare earth metal, divalent transition metal, aluminum oxide
Assignee: Centre National de la Recherche Scientifique
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Filing: 1983-05-04
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Granted: 1986-08-19
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Expires: 2003-05-04
Abstract
Abstract A mixed aluminum oxide having the following formula: X1(x1-x2)X2(x2)M1(y1-y2)M2(y2)Al(z1-z2)M3(z2)O19 wherein X1 and X2, which can be the same or different, represent a metal selected from the group consisting of lanthanum, praseodymium, neodymium, samarium and gadolinium, provided that X1 and X2 are different when X1 or X2 represents lanthanum or gadolinium; M1 and M2, which can be the same or different, each represent a metal selected from the group consisting of magnesium and divalent transition metals; M3 represents a trivalent transition metal; x1 represents a number from 0.8 to 1; y1 represents a number from 0.7 to 1; z1 represents a number from 10 to 12; x2 represents a number from 0 to x1; y2 represents a number from 0 to y1; and z2 represents a number from 0 to 1; and wherein said mixed aluminum oxide has a single phase crystalline structure of the magnetoplumbite type. A process for producing the mixed oxide is also disclosed, as well as its applications to power lasers emitting in the infrared and to telecommunications by optical fibers.
Inventors
- 👤 Andree Kahn
- 👤 Anne-Marie Lejus
- 👤 Jeanine Thery
- 👤 Daniel Vivien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:12
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C01; C01F; C01F17/00; C01F17/30; C01F17/32; C01F17/34; C01G; C01G33/00; C01G33/006; C01G37/00; C01G37/006; C01G49/00; C01G49/009; C04; C04B; C04B35/00; C04B35/01; C04B35/44; C04B35/50; C30B11/00; C30B13/00; C30B15/00; H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/1688; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2002/54; C01P2002/80; C01P2002/84; C01P2006/00; C01P2006/40
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
180 words
A mixed aluminum oxide having the following formula: X.sup.1.sub.(x.sbsb.1.sub.x.sbsb.2.sub.) X.sup.2.sub.(x.sbsb.2.sub.) M.sup.1.sub.(y.sbsb.1.sub.-y.sbsb.2.sub.) M.sup.2.sub.(y.sbsb.2.sub.) Al.sub.(z.sbsb.1.sub.-z.sbsb.2.sub.) M.sup.3.sub.(z.sbsb.2.sub.) O.sub.19 wherein X 1 represents a metal selected from the group consisting of lanthanum, praseodymium, neodymium, samarium and gadolinium, and X 2 represents a metal selected from the group consisting of praseodymium, neodymium, samarium, X 1 and X 2 being the same or different; M 1 and M 2 , which can be the same or different, represent a metal selected from the group consisting of magnesium and divalent transition metals; M 3 represents a trivalent transition metal; x 1 represents a number from 0.8 to 1; y 1 represents a number from 0.7 to 1; z 1 represents a number from 10 to 12; x 2 represents a number from 0 to x 1 , x 2 being different from 0 when X 1 represents lanthanum or gadolinium; y 2 represents a number from 0 to y 1 ; and z 2 represents a number from 0 to 1; and wherein said mixed aluminum oxide has a single phase crystalline structure of the magnetoplumbite type.
Claim 2
Dependent Claim
180 words
A mixed aluminum oxide having the following formula: X.sup.1.sub.(x.sbsb.1.sub.x.sbsb.2.sub.) X.sup.2.sub.(x.sbsb.2.sub.) M.sup.1.sub.(y.sbsb.1.sub.-y.sbsb.2.sub.) M.sup.2.sub.(y.sbsb.2.sub.) Al.sub.(z.sbsb.1.sub.-z.sbsb.2.sub.) M.sup.3.sub.(z.sbsb.2.sub.) O.sub.19 wherein X 1 represents a metal selected from the group consisting of lanthanum, praseodymium, neodymium, samarium and gadolinium, and X 2 represents a metal selected from the group consisting of praseodymium, neodymium, samarium, X 1 and X 2 being the same or different; M 1 and M 2 , which can be the same or different, represent a metal selected from the group consisting of magnesium and divalent transition metals; M 3 represents a trivalent transition metal; x 1 represents a number from 0.8 to 1; y 1 represents a number from 0.7 to 1; z 1 represents a number from 10 to 12; x 2 represents a number from 0 to x 1 , x 2 being different from 0 when X 1 represents lanthanum or gadolinium; y 2 represents a number from 0 to y 1 ; and z 2 represents a number from 0 to 1; and wherein said mixed aluminum oxide has a single phase crystalline structure of the magnetoplumbite type.
Claim 3
Dependent Claim
23 words
A mixed oxide according to claim 1, wherein x 1 is equal to 1, y 1 to 1 and z 1 to 11.
Claim 4
Dependent Claim
23 words
A mixed oxide according to claim 1, wherein x 1 is equal to 0.95, y 1 to 1 and z 1 to 11.
Claim 5
Dependent Claim
23 words
A mixed oxide according to claim 1, wherein x 1 is equal to 1, y 1 to 0.9 and z 1 to 11.
Claim 6
Dependent Claim
28 words
A mixed oxide according to claim 1, wherein the transition metals M 1 and M 2 are selected from the group consisting of magnanese, iron, nickel and cobalt.
Claim 7
Dependent Claim
12 words
A mixed oxide according to claim 1, wherein M 3 is chromium.
Claim 8
Dependent Claim
21 words
A mixed oxide according to claim 1, wherein X 1 represents lanthanum or gadolinium, X 2 neodynium and M 1 magnesium.
Claim 9
Dependent Claim
14 words
A mixed oxide according to claim 7, wherein x 2 is equal to 0.1.
Claim 10
Dependent Claim
20 words
A mixed oxide of the formula: La.sub.0.9 Nd.sub.0.1 MgAl.sub.11 O.sub.19 having a single phase crystalline structure of the magnetoplumbite type.
Claim 11
Dependent Claim
20 words
A mixed oxide of the formula: La.sub.0.9 Nd.sub.0.1 MgAl.sub.11 O.sub.19 having a single phase crystalline structure of the magnetoplumbite type.
Claim 12
Dependent Claim
32 words
A mixed aluminum oxide of the formula: Nd.sub.(1-x) La.sub.(x) MgAl.sub.11 O.sub.19 wherein x stands for a number from 0 to 0.99 and having a single phase crystalline structure of the magnetoplumbite type.
Claim 13
Dependent Claim
32 words
A mixed aluminum oxide of the formula: Nd.sub.(1-x) La.sub.(x) MgAl.sub.11 O.sub.19 wherein x stands for a number from 0 to 0.99 and having a single phase crystalline structure of the magnetoplumbite type.
Claim 14
Dependent Claim
135 words
A mixed aluminum oxide having the following formula: X.sup.1.sub.(x.sbsb.1.sub.-x.sbsb.2.sub.) Nd.sub.(x.sbsb.2.sub.) M.sup.1.sub.(y.sbsb.1.sub.-y.sbsb.2.sub.) M.sup.2.sub.(y.sbsb.2.sub.) Al.sub.(z.sbsb.1.sub.-z.sbsb.2.sub.) M.sup.3.sub.(z.sbsb.2.sub.) O.sub.19 wherein X 1 represents lanthanum or gadolinium; M 1 and M 2 , which can be the same or different, each represent a metal selected from the group consisting of magnesium and divalent transition metals; M 3 represents a trivalent transition metal; x 1 represents a number from 0.8 to 1; y 1 represents a number from 0.7 to 1; z 1 represents a number from 10 to 12; x 2 represents a number within the range of 0<x 2 ≦x 1 ; y 2 represents a number from 0 to y 1 ; and z 2 represents a number from 0 to 1; and wherein said mixed aluminum oxide has a single phase crystalline structure of the magnetoplumbite type.
Claim 15
Dependent Claim
135 words
A mixed aluminum oxide having the following formula: X.sup.1.sub.(x.sbsb.1.sub.-x.sbsb.2.sub.) Nd.sub.(x.sbsb.2.sub.) M.sup.1.sub.(y.sbsb.1.sub.-y.sbsb.2.sub.) M.sup.2.sub.(y.sbsb.2.sub.) Al.sub.(z.sbsb.1.sub.-z.sbsb.2.sub.) M.sup.3.sub.(z.sbsb.2.sub.) O.sub.19 wherein X 1 represents lanthanum or gadolinium; M 1 and M 2 , which can be the same or different, each represent a metal selected from the group consisting of magnesium and divalent transition metals; M 3 represents a trivalent transition metal; x 1 represents a number from 0.8 to 1; y 1 represents a number from 0.7 to 1; z 1 represents a number from 10 to 12; x 2 represents a number within the range of 0<x 2 ≦x 1 ; y 2 represents a number from 0 to y 1 ; and z 2 represents a number from 0 to 1; and wherein said mixed aluminum oxide has a single phase crystalline structure of the magnetoplumbite type.
Claim 16
Dependent Claim
27 words
The mixed oxide according to claim 11, wherein x 1 is equal to 1, y 1 is equal to 1 and z 1 is equal to 11.
Claim 17
Dependent Claim
27 words
The mixed oxide according to claim 11, wherein x 1 is equal to 0.95, y 1 is equal to 1 and z 1 is equal to 11.
Claim 18
Dependent Claim
27 words
The mixed oxide according to claim 11, wherein x 1 is equal to 1, y 1 is equal to 0.9 and z 1 is equal to 11.
Claim 19
Dependent Claim
28 words
The mixed oxide according to claim 11, wherein the transition metals M 1 and M 2 are selected from the group consisting of manganese, iron, nickel and cobalt.
Claim 20
Dependent Claim
12 words
The mixed oxide according to claim 11, wherein M 3 is chromium.
Claim 21
Dependent Claim
12 words
The mixed oxide according to claim 11, wherein M 1 is magnesium.
Claim 22
Dependent Claim
14 words
The mixed oxide according to claim 17, wherein x 2 is equal to 0.1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |