US3873473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphide solid solution having rock-salt structure and method of producing the same
Assignee: Hitachi Ltd
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Filing: 1973-05-15
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Granted: 1975-03-25
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Expires: 1993-05-15
Abstract
Abstract This invention provides a sulphide solid solution which is expressed by the general formula (Cd, A)S in which A is at least one element selected from the group consisting of Yb, Cr, Mg, Sr, Ca, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu, Y, Pb, Sn and Ge and which has a rock-salt structure under normal atmospheric pressure, and a method of producing the same. This sulphide solid solution is prepared by mixing the above constitutional elements, namely Cd, A and S, in the form of simple elements or in the form of sulphides of Cd and A to have a composition corresponding to said formula, holding the mixture under high temperature and high pressure conditions, lowering the temperature to room temperature and then lowering the pressure to normal atmospheric pressure.
Inventors
- 👤 Kenzo Susa
- 👤 Masami Yajima
- 👤 Satoshi Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:32
CPC Classifications
C; C01; C01G; C01G11/00; C01G37/00; C01G37/006; H; H01; H01B; H01B1/00; H01B1/06; H01B1/10; H10; H10P; H10P95/00; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2002/54; C01P2002/70; C01P2002/72; C01P2002/74; C01P2002/77; C01P2006/00; C01P2006/40; C01P2006/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A SULPHIDE SOLID SOLUTION HAVING A ROCK-SALT STRUCTURE AT FROM TEMPERAYURE AND NORMAL ATOMOPHERIC PRESSURE, SAID SOLID SOLUTION BEING REPRESENTED BY THE FORMULA (CD, A)S IN WHICH A IS AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF YB, CR, MG, SR, CA, LA, CE, PR, ND, PM, SM, EU, GD, TB, DY, HO, ER, TM, LU, Y, PB, SN AND GE.
Claim 2
Dependent Claim
63 words
A SULPHIDE SOLID SOLUTION HAVING A ROCK-SALT STRUCTURE AT FROM TEMPERAYURE AND NORMAL ATOMOPHERIC PRESSURE, SAID SOLID SOLUTION BEING REPRESENTED BY THE FORMULA (CD, A)S IN WHICH A IS AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF YB, CR, MG, SR, CA, LA, CE, PR, ND, PM, SM, EU, GD, TB, DY, HO, ER, TM, LU, Y, PB, SN AND GE.
Claim 3
Dependent Claim
94 words
A solid solution set forth in claim 1 wherein A is at least one element selected from the group consisting of more than 5 at. % of Yb; 10 to 15 at. % of Cr; more than 25 at. % of Mg; more than 10 at. % of Sr; more than 2.5 at. % of Ca; more than 5 at. % of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu, Y and Pb; 5 to 18 at. % of Sn and 10 to 15 at. % of Ge.
Claim 4
Dependent Claim
46 words
A solid solution set forth in claim 1 wherein a part of A is replaced with at least one element selected from the group consisting of Ba and Be and A is at least one element selected from the group consisting of Mg, Sr, and Ca.
Claim 5
Independent Claim
164 words
A method of producing a sulphide solid solution having a rock-salt structure at room temperature and normal atmospheric pressure, saId solid solution being represented by the formula (Cd, A)S in which A is at least one element selected from the group consisting of Yb, Cr, Mg, Sr, Ca, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu, Y, Pb, Sn and Ge, said method comprising the steps of (a) providing a raw material comprising A, Cd and S in which each of A, Cd and S takes a form of at least one selected from the group consisting of a simple substance and a sulphide, said raw material being mixed to have a composition corresponding to the formula (Cd, A)S, (b) holding said raw material under high temperature and high pressure conditions where said solid solution is thermodynamically stable as rock-salt structure, and (c) lowering the temperature to room temperature and then reducing the pressure to normal atmospheric pressure.
Claim 6
Independent Claim
164 words
A method of producing a sulphide solid solution having a rock-salt structure at room temperature and normal atmospheric pressure, saId solid solution being represented by the formula (Cd, A)S in which A is at least one element selected from the group consisting of Yb, Cr, Mg, Sr, Ca, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu, Y, Pb, Sn and Ge, said method comprising the steps of (a) providing a raw material comprising A, Cd and S in which each of A, Cd and S takes a form of at least one selected from the group consisting of a simple substance and a sulphide, said raw material being mixed to have a composition corresponding to the formula (Cd, A)S, (b) holding said raw material under high temperature and high pressure conditions where said solid solution is thermodynamically stable as rock-salt structure, and (c) lowering the temperature to room temperature and then reducing the pressure to normal atmospheric pressure.
Claim 7
Dependent Claim
85 words
A method set forth in claim 4 wherein A in said raw material is at least one element selected from the group consisting of more than 2.5 at. % of Yb, Sr, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu, Y and Pb, 5 to 20 at. % of Cr, more than 20 at. % of Mg, more than 1.5 at. % of Ca, 2.5 to 37.5 at. % of Sn and 5.0 to 37.5 at. % of Ge.
Claim 8
Dependent Claim
93 words
A method set forth in claim 4 wherein A is at least one element selected from the group consisting of more than 5 at. % of Yb, 10 to 15 at. % of Cr, more than 25 at. % of Mg, more than 10 at. % of Sr, more than 2.5 at. % of Ca, more than 5 at. % of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu, Y and Pb, 5 to 18 at. % of Sn and 10 to 15 at. % of Ge.
Claim 9
Dependent Claim
49 words
A method set forth in claim 4 wherein a part of A is replaced with at least one element selected from the group consisting of Ba and Be and the remaining part of A is at least one element selected from the group consisting of Mg, Sr and Ca.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |