US3984524A
Expired / Lapsed
US
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Single crystals based on stabilized zirconium dioxide or hafniun dioxide
Assignee: Individual
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Filing: 1975-01-14
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Granted: 1976-10-05
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Expires: 1995-01-14
Abstract
Abstract Single crystals based on stabilized zirconium dioxide or hafnium dioxide, wherein used as the stabilizer is scandium oxide or an oxide of one of the rare-earth elements. The content of components in a single crystal is as follows (mol.%): ______________________________________ zirconium dioxide or hafnium dioxide 70-95 stabilizer 30-5. ______________________________________ The single crystals of the present invention may also contain coloring agents in an amount of 0.01 to 5% of the single crystal weight.
Inventors
- 👤 Vladimir Ilich Alexandrov
- 👤 Vyacheslav Vasilievich Osiko
- 👤 Vladimir Mikhailovich Tatarintsev
- 👤 Viktor Timofeevich Udovenchik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B11/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
Transparent, cubic, single crystals of a stabilized dioxide of a metal selected from the group consisting of zirconium and hafnium, wherein the stabilizer is an oxide of a metal of the formula R 2 O 3 wherein R is selected from the group consisting of scandium and rare-earth elements selected from the group consisting of samarium, gadolinium, dysprosium, ytterbium, lutecium, thulium, europium, terbium and holmium, with the following content of said components in mol %: metal dioxide 70-95 stabilizer 30-5 said crystals having a microhardness of 14,000 to 20,000 MN/m 2 and a refractive index where n is 2- 2.2.
Claim 2
Dependent Claim
100 words
Transparent, cubic, single crystals of a stabilized dioxide of a metal selected from the group consisting of zirconium and hafnium, wherein the stabilizer is an oxide of a metal of the formula R 2 O 3 wherein R is selected from the group consisting of scandium and rare-earth elements selected from the group consisting of samarium, gadolinium, dysprosium, ytterbium, lutecium, thulium, europium, terbium and holmium, with the following content of said components in mol %: metal dioxide 70-95 stabilizer 30-5 said crystals having a microhardness of 14,000 to 20,000 MN/m 2 and a refractive index where n is 2- 2.2.
Claim 3
Dependent Claim
108 words
Transparent, cubic, single crystals as claimed in claim 1, in which scandium oxide is the stabilizer, and which also contain at least one colorant metal oxide selected from the group consisting of Co 2 O 3 , NiO, TiO 2 , V 2 O 5 , Cr 2 O 3 , MnO 2 , CuO, Fe 2 O 3 , CeO 2 , Ce 2 O 3 , Pr 2 O 3 , Eu 2 O 3 , Ho 2 O 3 , Er 2 O 3 , Tu 2 O 3 and Nd 2 O 3 in an amount 0.01 to 5% of the single crystal weight.
Claim 4
Dependent Claim
30 words
Transparent, cubic, single crystals as claimed in claim 1, wherein the stabilizer is an oxide of a metal selected from the group consisting of samarium, gadolinium, dysprosium, ytterbium, and lutecium.
Claim 5
Dependent Claim
100 words
Transparent, cubic, single crystals as claimed in claim 3, also containing at least one colorant metal oxide selected from the group consisting of Co 2 O 3 , NiO, TiO 2 , V 2 O 5 , Cr 2 O 3 , MnO 2 , CuO, Fe 2 O 3 , CeO 2 , Ce 2 O 3 , Pr 2 O 3 , Eu 2 O 3 , HO 2 O 3 , Er 2 O 3 , Tu 2 O 3 and Nd 2 O 3 in an amount of 0.01 to 5% of the single crystal weight.
Claim 6
Dependent Claim
29 words
Transparent, cubic single crystals as claimed in claim 1, wherein the stabilizer is an oxide of a metal selected from the group consisting of thulium, europium, terbium and holmium.
Claim 7
Dependent Claim
63 words
Transparent, cubic, single crystals as claimed in claim 5, also containing at least one colorant metal oxide selected from the group consisting of Co 2 O 3 , NiO, TiO 2 , V 2 O 5 , Cr 2 O 3 , MnO 2 , CuO, and Fe 2 O 3 in an amount of 0.01 to 5% of the single crystal weight.
References Cited (Backward Citations)
US3809639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |