EP0026625A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for producing multi-component glass fiber preform
Assignee: NTT Inc
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Filing: 1980-09-23
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Granted: —
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Expires: 2000-09-23
Abstract
Abstract A method for producing a multi-component glass fiber preform which comprises the steps of nebulizing an aqueous solution of at least one metal salt, and reacting the nebulized solution and a gaseous glass raw material with oxygen gas at a high temperature to produce particulate glass material deposited on a substrate. Apparatus for producing such a preform is also disclosed.
Inventors
- 👤 Shiro Takahashi
- 👤 Kazuo Sanada
- 👤 Koichi Inada
- 👤 Osamu Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 23:21
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/01413; C03B37/0142; C03B37/018; C03B37/01807; C03B2201/00; C03B2201/06; C03B2201/30; C03B2201/34; C03B2201/50; C03B2201/54; C03B2203/00; C03B2203/10; C03B2203/22; C03B2203/26; C03B2207/00; C03B2207/04; C03B2207/06; C03B2207/08; C03B2207/20; C03B2207/26; C03B2207/28; C03B2207/30; C03B2207/32; C03B2207/34; C03B2207/40
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
51 words
A method for producing a multi-component glass fiber preform which comprises the steps of nebulizing an aqueous solution of at least one metal salt, and reacting the nebulized solution and a gaseous glass raw material with oxygen gas at a high temperature to produce particulate glass material deposited on a substrate.
Claim 2
Independent Claim
51 words
A method for producing a multi-component glass fiber preform which comprises the steps of nebulizing an aqueous solution of at least one metal salt, and reacting the nebulized solution and a gaseous glass raw material with oxygen gas at a high temperature to produce particulate glass material deposited on a substrate.
Claim 3
Dependent Claim
18 words
A method according to claim 1, in which said glass raw material is silicon chloride SiCℓ 4 .
Claim 4
Dependent Claim
39 words
A method according to claim 2, in which said glass raw material further comprises at least one material selected from the group consisting of germanium chloride Gec 4 , phosphoryl chloride POCℓ 3 and boron bromide BBr 3 .
Claim 5
Dependent Claim
63 words
A method according to claim 1, in which said metal salt is selected from the group consisting of alkali metal nitrate, alkali metal carbonate, alkali metal sulfate, alkali metal acetate, alkaline earth metal nitrate, alkaline earth metal carbonate, alkaline earth metal sulfate, alkaline earth metal acetate, lead nitrate, lead carbonate, lead sulfate, lead acetate, lanthanium nitrate, lanthanium carbonate, lanthanium sulfate and lanthanium acetate.
Claim 6
Independent Claim
25 words
A method according to any of claims 1 to 4, in which said aqueous solution of metal salt is nebulized by a gas under pressure.
Claim 7
Independent Claim
23 words
A method according to any of claims 1 to 4, in which said aqueous solution of metal salt is nebulized by supersonic vibration.
Claim 8
Independent Claim
59 words
A method according to any of claims 1 to 6, in which said glass raw material, said nebulized solution and said oxygen gas are applied into a flame produced by a burner to deposit said particulate glass material on said substrate, said substrate being in the form of a bar which is axially rotated and moved along its axis.
Claim 9
Dependent Claim
26 words
A method according to claim 7, in which said glass raw material and said oxygen gas are fed through individual concentric conduits of said burner respectively.
Claim 10
Dependent Claim
29 words
A method according to claim 7, in which said glass raw material, said nebulized solution and said oxygen gas are fed through individual concentric conduits of said burner, respectively.
Claim 11
Dependent Claim
21 words
A method according to claim 7, in which said particulate glass material is deposited on one end of said substrate bar.
Claim 12
Dependent Claim
22 words
A method according to claim 7, in which said particulate glass material is deposited on the outer periphery of said substrate bar.
Claim 13
Dependent Claim
68 words
A method according to claim 1, in which said substrate is in the form of a tube, said glass raw material, said nebulized solution and said oxygen gas being introduced into said tube, said tube being heated by a heating means from the outside thereof to deposite said particuate glass material on the inner peripheral surface thereof, and said.heating means moving along said tube during the deposition operation.
Claim 14
Dependent Claim
99 words
Apparatus for producing a multi-component glass fiber preform which comprises a multi-conduit burner having five concentric conduits, the centrally disposed first conduit and the second and third conduits adjacent thereto being flush with one another at their tip ends, the fourth conduit interposed between the third and outermost conduits extending axially beyond them, the first to fifth conduits serving to feed a gaseous glass raw material, a fuel gas, a nebulized aqueous solution of at least one metal salt, an inert gas and oxygen gas, respectively, and said burner having a nozzle adapted to be directed to a substrate.
Claim 15
Dependent Claim
99 words
Apparatus for producing a multi-component glass fiber preform which comprises a multi-conduit burner having five concentric conduits, the centrally disposed first conduit and the second and third conduits adjacent thereto being flush with one another at their tip ends, the fourth conduit interposed between the third and outermost conduits extending axially beyond them, the first to fifth conduits serving to feed a gaseous glass raw material, a fuel gas, a nebulized aqueous solution of at least one metal salt, an inert gas and oxygen gas, respectively, and said burner having a nozzle adapted to be directed to a substrate.
References Cited (Backward Citations)
No citation records indexed.
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