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US3785834A
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Glasses,glass-ceramics and process for making same
Assignee: OI Glass Inc
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Filing: 1972-06-09
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Granted: 1974-01-15
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Expires: 1992-06-09
Abstract
Abstract Thermally crystallizable glasses of the R2O-RE2O3-Nb2O5-GF system wherein R is an alkali metal cation, RE is a rare earth metal cation, and GF is a glass former, namely, SiO2, GeO2 or P2O5, and transparent, translucent and opaque glass-ceramics made therefrom which have excellent dielectric properties, have high indices of refraction when the glass-ceramic is transparent and are suitable for use as capacitors and dielectrics, and for use in acoustooptical and electrooptical devices and the like. Also thermally crystallizable glasses of the R1O-RE2O3-Nb2O5-GeO2 system wherein R1 is a divalent metal cation and RE is a rare earth metal cation and such glasses have high indices of refraction usually above 2.00, and very low acoustic attenuation. These properties make the glasses and also the transparent glassceramics made therefrom ideally suited for use in acoustooptical and electrooptical devices wherein such properties are important to the efficient operation of such devices. Transparent and opaque glass-ceramics made from such glasses also have good dielectric properties including high dielectric constants and low dissipation factors. Glass-ceramics of the invention preferably have crystalline phases exhibiting the cubic perovskite structure or the tetragonal tungsten-bronze structure.
Inventors
- 👤 J Rapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:43
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/129; C; C03; C03C; C03C10/00; C03C10/0009; C03C10/0054; C03C3/00; C03C3/12; C03C3/16; G; G02; G02F; G02F1/00; G02F1/0009; G02F1/0018; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/901
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
28 words
The thermally crystallizable glass as defined in claim 1 wherein said R2O is a member selected from the group consisting of Na2O, K2O, Rb2O, Cs2O and mixtures thereof.
Claim 2
Dependent Claim
45 words
A glass-ceramic body having a dielectric constant in excess of 50 (Room temperature, 0.5MHz) and a dissipation factor of less than 2 percent, said glass ceramic prepared by thermally in situ crystallizing a thermally crystallizable glass consisting essentially of the following ingredients in mole percent:
Claim 3
Dependent Claim
23 words
The glass-ceramic body as defined in claim 3 wherein said glass-ceramic is transparent and has an index of refraction of at least 1.90.
Claim 4
Dependent Claim
24 words
The glass ceramic body as defined in claim 3 wherein said glass-ceramic is transparent and has an index of refraction of at least 2.00.
Claim 5
Dependent Claim
32 words
The glass-ceramic body as defined in claim 3 wherein said glass-ceramic body has a dielectric constant in excess of 150 (Room Temperature, 0.5MHz) and a dissipation factor of less than 1 percent.
Claim 6
Dependent Claim
86 words
A glass-ceramic body prepared by thermally in situ crystallizing a thermally crystallizable glass of the composition R2RENb5O15.x SiO2 wherein R is an alkali metal cation, RE is a trivalent metal cation selected from the group consisting of La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Sc, Y, In and Bi and x is a number of from 1 to 3, said glass ceramic body having a crystal structure selected from the group consisting of cubic perovskite crystal structure and tetragonal tungsten-bronze crystal structure.
Claim 7
Dependent Claim
22 words
The glass-ceramic body as defined in claim 3 wherein said thermally crystallizable glass consists essentially of the following ingredients in mole percent:
Claim 8
Dependent Claim
30 words
A thermally crystallizable glass having an index of refraction of at least about 1.95 and low acoustic attenuation properties, said glass consisting essentially of the following ingredients in mole percent:
Claim 9
Dependent Claim
30 words
A thermally crystallizable glass having an index of refraction of at least about 1.95 and low acoustic attenuation properties, said glass consisting essentially of the following ingredients in mole percent:
Claim 10
Dependent Claim
19 words
The thermally crystallizable glass as defined in claim 9 wherein said index of refraction is in excess of 2.00
Claim 11
Dependent Claim
87 words
A glass-ceramic body prepared by thermally in situ crystallizing a thermally crystallizable glass of the composition R2RENb5O15.x GeO2 wherein R is an alkali metal cation, RE is a trivalent metal cation selected from the group consisting of La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Sc, Y, In and Bi and x is a number of from 1 to 4, said glass-ceramic body containing crystals having a crystal structure selected from the group consisting of cubic perovskite crystal structure and tetragonal tungsten-bronze crystal structure.
Claim 12
Dependent Claim
87 words
A glass-ceramic body prepared by thermally in situ crystallizing a thermally crystallizable glass of the composition R2RENb5O15.x GeO2 wherein R is an alkali metal cation, RE is a trivalent metal cation selected from the group consisting of La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Sc, Y, In and Bi and x is a number of from 1 to 3, said glass-ceramic body containing crystals having a crystal structure selected from the group consisting of cubic perovskite crystal structure and tetragonal tungsten-bronze crystal structure.
Claim 13
Dependent Claim
20 words
A glass-ceramic body prepared by thermally crystallizing a thermally crystallizable glass consisting essentially of the following ingredients in mole percent:
Claim 14
Dependent Claim
42 words
A glass-ceramic body having a dielectric constant in excess of at least 35 (Room Temperature, 0.5 MHz) and a dissipation factor of less than 2 percent, said glass-ceramic prepared by thermally in situ crystallizing a thermally crystallizable glass defined in claim 9.
Claim 15
Dependent Claim
39 words
The glass-ceramic body as defined in claim 15 wherein said glass-ceramic is transparent and has an index of refraction of over 2.00 and a dielectric constant in excess of 50 and a dissipation factor of less than 2 percent.
Claim 16
Dependent Claim
57 words
A thermally crystallizable glass having an index of refraction above 1.80 and being suitable for in situ crystallization to a glass-ceramic having a higher index of refraction, a dielectric constant (R.T., 0.5 MHz) of at least 40 and a dissipation factor of less than 2 percent, said glass consisting essentially of the following ingredients in mole percent:
Claim 17
Dependent Claim
28 words
The thermally crystallizable glass as defined in claim 17 wherein said R2O is a member selected from the group consisting of Na2O, K2O, Rb2O, Cs2O and mixtures thereof.
Claim 18
Dependent Claim
21 words
The thermally crystallizable glass as defined in claim 17 wherein said glass consists essentially of the following ingredients in mole percent:
Claim 19
Dependent Claim
44 words
A glass-ceramic body having a dielectric constant (R.T., 0.5 MHz) of at least 40 and a dissipation factor of less than 2 percent, said glass-ceramic prepared by thermally in situ crystallizing a thermally crystallizable glass consisting essentially of the following ingredients in mole percent:
Claim 20
Dependent Claim
20 words
The glass-ceramic body of claim 20 wherein said thermally crystallizable glass consists essentially of the following ingredients in mole percent:
Claim 21
Dependent Claim
23 words
The glass-ceramic body as defined in claim 20 wherein said glass-ceramic is transparent and has an index of refraction of at least 1.90.
Claim 22
Dependent Claim
23 words
The glass-ceramic body as defined in claim 20 wherein said glass-ceramic is transparent and has an index of refraction of at least 2.00.
Claim 23
Dependent Claim
31 words
The glass-ceramic body as defined in claim 20 wherein said body has a dielectric constant of at least 65 (R.T., 0.5 MHz) and a dissipation factor of less than 1 percent.
Claim 24
Dependent Claim
86 words
A glass-ceramic body prepared by thermally in situ crystallizing a thermally crystallizable glass of the composition R2RENb5O15.x P2O5 wherein R is an alkali metal cation, RE is a trivalent metal cation selected from the group consisting of La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Sc, Y, In and Bi and x is a number of from 1 to 2.5, said glass ceramic body having a crystal structure selected from the group consisting of cubic perovskite crystal structure and tetragonal tungsten-bronze crystal structure.
Claim 25
Dependent Claim
29 words
A thermally crystallizable glass having an index of refraction of at least 2.00 and low acoustical attenuation properties, said glass consisting essentially of the following ingredients in mole percent:
Claim 26
Dependent Claim
29 words
The thermally crystallizable glass as defined in claim 26 wherein up to about one-half of said R1O is replaced by an equal mole percent of an alkali metal oxide.
Claim 27
Dependent Claim
29 words
A thermally crystallizable glass having an index of refraction of at least 2.00 and low acoustical attenuation properties, said glass consisting essentially of the following ingredients in mole percent:
Claim 28
Dependent Claim
38 words
A transparent glass-ceramic body having a high index of refraction and low acoustical attenuation properties, said glass ceramic formed by thermal in situ crystallization of a thermally crystallizable glass consisting essentially of the following ingredients in mole percent:
Claim 29
Dependent Claim
29 words
The transparent glass-ceramic body as defined in claim 29 wherein up to about one-half of said R1O is replaced by an equal mole percent of an alkali metal oxide.
Claim 30
Dependent Claim
37 words
A transparent glass-ceramic body having a high index of refraction and low acoustical attenuation properties, said glass-ceramic formed by thermal in situ crystallization of a thermally crystallizable glass consisting essentially of the following ingredients in mole percent:
Claim 31
Dependent Claim
38 words
A transparent gLass-ceramic body having a high index of refraction and low acoustical attenuation properties, said glass ceramic formed by thermal in situ crystallization of a thermally crystallizable glass consisting essentially of the following ingredients in mole percent:
Claim 32
Dependent Claim
96 words
A glass-ceramic body prepared by thermally in situ crystallizing a thermally crystallizable glass of the composition R1RENb5O15.x GeO2 wherein R1 is a divalent metal cation selected from Sr 2, Ba 2 and Pb 2 and mixtures thereof, RE is a trivalent metal cation selected from the group consisting of La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Sc, Y, In and Bi and x is a number from 1.8 to 3.7, said glass-ceramic body having a crystal structure selected from the group consisting of cubic perovskite crystal structure and tetragonal tungsten-bronze crystal structure.
Claim 33
Dependent Claim
23 words
A glass-ceramic body formed by thermal in situ crystallization of a thermally crystallizable glass consisting essentially of the following ingredients in mole percent:
Claim 34
Dependent Claim
28 words
The glass-ceramic body of claim 34 wherein said body has a dielectric constant (R.T., 0.5 MHz) greater than 200 and a dissipation factor of less than 3 percent.
Claim 35
Dependent Claim
15 words
The glass-ceramic body of claim 34 wherein said dissipation factor is less than 1 percent.
Claim 36
Dependent Claim
12 words
Glasses thermally crystallizable to transparent glass-ceramics consisting essentially of the following ingredients:
Claim 37
Dependent Claim
14 words
A transparent glass ceramic made by thermal crystallization of a glass of claim 37.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |