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US5089466A
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Stable mixed metal superconductive oxides containing nitrogen
Assignee: University of Colorado Foundation Inc
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Filing: 1988-07-08
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Granted: 1992-02-18
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Expires: 2008-07-08
Abstract
Abstract Stable mixed metal oxide compositions containing nitrogen are formed by treating an oxygen-deficient perovskite composition with nitrogen dioxide. Preferably, the oxygen-deficient perovskite is of the formula X a Z b Cu c O h wherein X is a member selected from the group consisting of yttrium, scandium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, bismuth and thallium, Z is a member selected from the group consisting of barium, strontium, calcium, magnesium and mixtures thereof, a is not less than 1, b is from 0 to 3, c is from 0 to 3, and h is not greater than about 6, and the mixed metal oxides are of the formula X a Z b Cu c N j O k where X, Z, a, b and c are as previously defined, j is from about 0.001 to about 3, and k is from about 6 to about 13.
Inventors
- 👤 Robert E. Sievers
- 👤 Stephen A. Montzka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:56
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0436; H10N60/0464; C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/408; C23C16/56; C23C8/00; C23C8/02; C23C8/06; C23C8/08; C23C8/10; C23C8/12; Y; Y10; Y10S; Y10S505/00; Y10S505/775; Y10S505/776; Y10S505/779; Y10S505/78
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
A composition of matter of the formula XZ.sub.2 Cu.sub.3 N.sub.j O.sub.k wherein X is selected from the group consisting of yttrium, thallium and bismuth, Z is selected from the group consisting of barium and mixtures of barium with one or more elements selected from the group consisting of strontium, calcium and magnesium, j is from about 1 to about 3 and k is from about 9 to about 13.
Claim 2
Dependent Claim
69 words
A composition of matter of the formula XZ.sub.2 Cu.sub.3 N.sub.j O.sub.k wherein X is selected from the group consisting of yttrium, thallium and bismuth, Z is selected from the group consisting of barium and mixtures of barium with one or more elements selected from the group consisting of strontium, calcium and magnesium, j is from about 1 to about 3 and k is from about 9 to about 13.
Claim 3
Dependent Claim
11 words
A composition as defined in claim 1, wherein Z comprises barium.
Claim 4
Dependent Claim
11 words
A composition as defined by claim 1, wherein X comprises yttrium.
Claim 5
Dependent Claim
23 words
A composition as defined by claim 1, wherein Z comprises a mixture of barium and at least one of strontium, calcium and magnesium.
Claim 6
Dependent Claim
16 words
A composition as defined in claim 1, wherein k is from about 10 to about 13.
Claim 7
Dependent Claim
77 words
A composition of matter of the formula XZ.sub.2 Cu.sub.3 N.sub.j O.sub.k F.sub.g wherein X is selected from the group consisting of yttrium, thallium and bismuth, Z is selected from the group consisting of barium and mixtures of barium with one or more elements selected from the group consisting of strontium, calcium and magnesium, j is from about 1 to about 3, k is from about 9 to about 13, and g is not greater than about 2.
Claim 8
Dependent Claim
77 words
A composition of matter of the formula XZ.sub.2 Cu.sub.3 N.sub.j O.sub.k F.sub.g wherein X is selected from the group consisting of yttrium, thallium and bismuth, Z is selected from the group consisting of barium and mixtures of barium with one or more elements selected from the group consisting of strontium, calcium and magnesium, j is from about 1 to about 3, k is from about 9 to about 13, and g is not greater than about 2.
Claim 9
Dependent Claim
11 words
A composition as defined by claim 6, wherein Z comprises barium.
Claim 10
Dependent Claim
11 words
A composition as defined by claim 6, wherein X comprises yttrium.
Claim 11
Dependent Claim
23 words
A composition as defined by claim 6, wherein Z comprises a mixture of barium and at least one of strontium, calcium and magnesium.
Claim 12
Dependent Claim
16 words
A composition as defined by claim 6, wherein k is from about 10 to about 13.
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