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US4749666A
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Indium-based fluoride glasses and their preparation
Assignee: Centre National de la Recherche Scientifique
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Filing: 1986-12-22
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Granted: 1988-06-07
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Expires: 2006-12-22
Abstract
Abstract Fluoride glasses comprise at least one fluoride of each of the following five categories: -Fluorides Molar amount % -M1F3 u -M2F4 v -M3F2 w -M4F3 x -M5F2 y - wherein M1 represents In or Ga; M2 represents Th or U; M3 represents Ba or Pb; M4 represents Y, Yb or Lu; M5 represents Zn or Mn; and wherein u=25-35; v=5-12; w=25-35; x=5-12; and y=15-30; and optionally, at least one adjuvant or dopant present in a molar percent, z, wherein z=0-4. This composition is capable of providing, by casting in the molten state, followed by cooling, pieces of glass having a thickness greater than 10 mm. The specification also describes a method of producing these fluoride glasses.
Inventors
- 👤 Jacques Lucas
- 👤 Gilles H. Fonteneau
- 👤 Abdelmajid Bouaggad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:23
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/32; C03C3/325; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A fluoride glass composition comprises at least one fluoride of each of the following five categories: ______________________________________
Fluoride Molar amount, percent
______________________________________
M.sup.1 F.sub.3
u
M.sup.2 F.sub.4
v
M.sup.3 F.sub.2
w
M.sup.4 F.sub.3
x
M.sup.5 F.sub.2
y
______________________________________ wherein M 1 representing In or Ga, M 2 representing Th or U, M 3 representing Ba or Pb, M 4 representing Y, Yb or Lu, and M 5 representing Zn or Mn, and wherein u=25-35, v=5-12, w=25-35, x=5-12 and y=15-30, and optionally, at least one adjuvant or dopant present in a molar percent, z, wherein z=0-4, and wherein the sum, (u+v+w+x+y+z) is equal to 100.
Claim 2
Dependent Claim
104 words
A fluoride glass composition comprises at least one fluoride of each of the following five categories: ______________________________________
Fluoride Molar amount, percent
______________________________________
M.sup.1 F.sub.3
u
M.sup.2 F.sub.4
v
M.sup.3 F.sub.2
w
M.sup.4 F.sub.3
x
M.sup.5 F.sub.2
y
______________________________________ wherein M 1 representing In or Ga, M 2 representing Th or U, M 3 representing Ba or Pb, M 4 representing Y, Yb or Lu, and M 5 representing Zn or Mn, and wherein u=25-35, v=5-12, w=25-35, x=5-12 and y=15-30, and optionally, at least one adjuvant or dopant present in a molar percent, z, wherein z=0-4, and wherein the sum, (u+v+w+x+y+z) is equal to 100.
Claim 3
Dependent Claim
95 words
The fluoride glass of claim 1 which contains a positive amount of the fluorides of indium, thorium and barium, in molar percentages, respectively, of m, p and q, and optionally containing fluorides of gallium, uranium and/or lead present in molar percentages, respectively, of r, s and t which can be zero and such that the ratio r/(m+r) is lower than or equal to 0.2; s/(p+s) is lower than or equal to 0.2; and t/(q+t) is lower than or equal to 0.5; wherein m+r=25-35; p+s=5-12; and q+t=25-35, and wherein the sum, (m+p+q+r+s+t+x+y+z) is equal to 100.
Claim 4
Dependent Claim
41 words
The fluoride glass of claim 1 comprising: ______________________________________
Constituent Molar Proportion
InF.sub.3 25-35
ThF.sub.4 5-12
BaF.sub.2 25-35
M.sup.4 F.sub.3
5-12
M.sup.5 F.sub.2
15-30
Adjuvant 0-4
______________________________________ and wherein the sum of the molar proportions of the constituents is equal to 100.
Claim 5
Dependent Claim
61 words
A process for preparing a fluoride glass of claim 1 comprising admixing the fluoride constituents, or corresponding oxides thereof together with a sufficient amount of a fluorinating agent to convert said oxides to fluorides, melting said mixture under a neutral and dry atmosphere, and cooling the resulting liquid composition so as to produce the said fluoride glass in the desired form.
Claim 6
Dependent Claim
11 words
The fluoride glass of claim 1 in molded or shaped form.
Claim 7
Dependent Claim
12 words
The fluoride glass of claim 1 in the form of optical fibers.
References Cited (Backward Citations)
US4141741A
Cited
US4666870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |