JPH0435429B2 - - Google Patents
Info
- Publication number
- JPH0435429B2 JPH0435429B2 JP249388A JP249388A JPH0435429B2 JP H0435429 B2 JPH0435429 B2 JP H0435429B2 JP 249388 A JP249388 A JP 249388A JP 249388 A JP249388 A JP 249388A JP H0435429 B2 JPH0435429 B2 JP H0435429B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- glass
- burner
- base material
- deposition rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002994 raw material Substances 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 20
- 238000000151 deposition Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 9
- 239000010419 fine particle Substances 0.000 claims description 4
- 239000005373 porous glass Substances 0.000 claims description 2
- 230000008021 deposition Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/04—Multi-nested ports
- C03B2207/06—Concentric circular ports
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/42—Assembly details; Material or dimensions of burner; Manifolds or supports
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光フアイバ用母材の製造方法に関し、
詳しくは多重管バーナを用いてガラス微粒子を合
成し堆積する方法の改善に係わるものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a base material for optical fiber,
Specifically, the present invention relates to an improvement in the method of synthesizing and depositing glass particles using a multi-tube burner.
光フアイバ用母材を製造する従来技術のなかで
も、ガラス原料をバーナの火炎中で加水分解反応
又は酸化反応させることによりガラス微粒子を合
成して、これを堆積するいわゆるスート法により
光フアイバ用多孔質母材を製造し、次に加熱によ
り脱水・透明化して透明ガラス母材を得る方法が
広く行われている。このようなスート法は高純度
の多孔質母材を生産性良く得られる優れた方法で
ある。
Among the conventional techniques for manufacturing optical fiber base materials, porous optical fibers are manufactured using the so-called soot method, in which fine glass particles are synthesized by subjecting glass raw materials to a hydrolysis reaction or oxidation reaction in the flame of a burner, and then deposited. A widely used method is to produce a glass base material and then dehydrate and make it transparent by heating to obtain a transparent glass base material. Such a soot method is an excellent method for obtaining a highly purified porous base material with good productivity.
このスート法の一法として、第５図に示すよう
に、多重管バーナ１を用いて該バーナ１の中心部
分の原料吹出口からガラス原料ガスを吹出し、該
バーナ１により形成される火炎２内で生成したガ
ラス微粒子を回転する出発材３に堆積させて、堆
積体４を回転方向に生長させる方法がある。な
お、５は反応容器、６は排気管である。この方法
の利点は回転方向に連続的に製造することが可能
であり、均質な光フアイバ用母材を再現性良く得
られることである。 As one method of this soot method, as shown in FIG. There is a method of depositing the glass fine particles produced in the above on a rotating starting material 3 and growing the deposited body 4 in the direction of rotation. Note that 5 is a reaction vessel and 6 is an exhaust pipe. The advantage of this method is that it can be manufactured continuously in the rotational direction and that a homogeneous optical fiber base material can be obtained with good reproducibility.
しかしながら、上記した第５図のような方法で
は、ガラス原料を増量してゆくと收率（堆積速
度／原料投入量）が劣下して堆積速度が上らない
という問題があつた。
However, the method shown in FIG. 5 described above has a problem in that as the amount of glass raw material is increased, the yield (deposition rate/amount of raw material input) deteriorates and the deposition rate cannot be increased.
近年光フアイバ母材製造分野においても、生産
効率の向上、コスト低減その他の目的から太径の
母材を製造する必要が生じており、上記の問題の
早急な解決が望まれている。 In recent years, in the field of manufacturing optical fiber preforms, there has been a need to manufacture preforms with large diameters for the purpose of improving production efficiency, reducing costs, and other purposes, and an immediate solution to the above problems is desired.
本発明はこのような現状に鑑みてなされたもの
であつて、多重管バーナを用いてスート付けをす
るにあたり、收率高くしかも安定性良くガラス微
粒子を堆積できる光フアイバ用母材の製造方法を
目的とするものである。 The present invention has been made in view of the current situation, and provides a method for manufacturing an optical fiber base material that can deposit glass fine particles with high yield and stability when sooting using a multi-tube burner. This is the purpose.
本発明者らは、上記問題点を解決すべく種々検
討、研究の結果、多重管バーナの原料吹出口のサ
イズと火炎のサイズの間に最も堆積効率が高くな
るような関係のあることに気づき、本発明に到達
した。
As a result of various studies and studies to solve the above-mentioned problems, the present inventors realized that there is a relationship between the size of the raw material outlet of a multi-tube burner and the size of the flame that maximizes the deposition efficiency. , arrived at the present invention.
すなわち本発明は多重管バーナの中心部分から
ガラス原料を供給して、該バーナが形成する火炎
中でガラス原料を反応させることにより生成させ
たガラス微粒子を堆積させて多孔質ガラス母材を
製造する方法において、該多重管バーナの最外周
ポート内径をガラス原料を流す最外ポートの内径
の５〜20倍の範囲内として堆積することを特徴と
する光フアイバ用母材の製造方法である。 That is, in the present invention, a porous glass base material is produced by supplying glass raw materials from the center of a multi-tube burner and depositing glass fine particles generated by reacting the glass raw materials in a flame formed by the burner. A method for producing an optical fiber preform, wherein the preform is deposited so that the inner diameter of the outermost port of the multi-tube burner is within a range of 5 to 20 times the inner diameter of the outermost port through which the glass raw material flows.
以下、図面を参照して本発明を具体的に説明す
る。本発明は例えば第５図に示すような構成で、
多重管バーナ１にガラス原料ガス、燃焼ガス、助
燃ガス、不活性ガス等を導入し、火炎２中での火
炎加水分解によりガラス微粒子を生成させてこれ
を回転する出発材３に堆積させることにより多孔
質母材４を形成する点は従来と同じであるが、第
１図に示すように多重管バーナ１において原料を
流すポートのうちの最外周ポート１１の内径をｄ
（原料吹出口直径）、多重管バーナ１の最外周ポー
ト１２の内径をＤ（火炎の直径）とすると、Ｄ／
ｄ＝５〜20の範囲内として多孔質母材を形成する
のである。 Hereinafter, the present invention will be specifically explained with reference to the drawings. The present invention has a configuration as shown in FIG. 5, for example,
By introducing frit gas, combustion gas, auxiliary combustion gas, inert gas, etc. into the multi-tube burner 1, and generating glass particles through flame hydrolysis in the flame 2, the particles are deposited on the rotating starting material 3. The point of forming the porous base material 4 is the same as that of the conventional method, but as shown in FIG.
(raw material outlet diameter), and the inner diameter of the outermost port 12 of the multi-tube burner 1 is D (flame diameter), then D/
A porous base material is formed with d=5 to 20.
従来のバーナでは一般にＤ／ｄ＝３程度であつ
て、この従来バーナを用いた時の原料（）SiO2
換算）投入量（ｇ／分）と堆積速度（ｇ／分）の
関係を第４図のグラフに示すが、原料投入量が15
ｇ／分を越えると堆積速度は７ｇ／分で飽和して
しまい、これ以上原料投入量を増やしても堆積効
率は47％以上には向上しなかつた。
In conventional burners, D/d is generally about 3, and when using this conventional burner, the raw material ()SiO 2
The relationship between the input amount (converted) (g/min) and the deposition rate (g/min) is shown in the graph in Figure 4.
When the rate exceeded 7 g/min, the deposition rate was saturated at 7 g/min, and even if the raw material input amount was further increased, the deposition efficiency could not be improved to 47% or more.
そこで原料（SiO2換算）投入量を10ｇ／分に
固定し、Ｄ／ｄの値が３〜30の間で異なる種々の
多重管バーナを用いてスート付けし、この時の堆
積速度（ｇ／分）を調べた。第２図のグラフにこ
の結果を示すが、本発明範囲のＤ／ｄが５〜20に
おいて、收率60％以上の高率で安定に母材を製造
し得ることが明らかである。 Therefore, the raw material (SiO 2 equivalent) input amount was fixed at 10 g/min, soot was applied using various multi-tube burners with D/d values between 3 and 30, and the deposition rate (g/min) was minutes). The results are shown in the graph of FIG. 2, and it is clear that when D/d is within the range of the present invention from 5 to 20, the base material can be stably produced at a high yield of 60% or more.
実施例 １
火炎外径が50、原料吹出口直径が５でＤ／ｄ＝
10の多重管バーナを用いてガラス微粒子体の堆積
を行なつた。このとき原料吹出口からの原料とし
てはSiCl4を、燃焼ガスとしてはH280／分、助
燃ガスとしてはO2を70／分、さらに不活性ガ
スArを20／分流した。原料（SiO2換算）投入
量（ｇ／分）を種々に変化させたときの堆積速度
（ｇ／分）の変化を第３図に示す。この結果、
Ｄ／ｄ＝10の場合には堆積速度13ｇ／分までは安
定に製造できることが判つた。これは従来法の
Ｄ／ｄ＝３程度のバーナを用いる場合の原料投入
量15ｇ／分で堆積速度７ｇ／分までという値に比
して、はるかに高い値であり、本発明の効果が明
らかに理解できる。
Example 1 The flame outer diameter is 50, the raw material outlet diameter is 5, and D/d=
Glass particles were deposited using 10 multi-tube burners. At this time, SiCl 4 was flowed as the raw material from the raw material outlet, H 2 was flowed at 80/min as the combustion gas, O 2 was flowed at 70/min as the auxiliary combustion gas, and inert gas Ar was flowed at 20/min. FIG. 3 shows the changes in the deposition rate (g/min) when the raw material (SiO 2 equivalent) input amount (g/min) was varied. As a result,
It was found that when D/d=10, stable production could be achieved at a deposition rate of up to 13 g/min. This is a much higher value than the conventional method using a burner with D/d = 3, in which the material input rate is 15 g/min and the deposition rate is up to 7 g/min, and the effect of the present invention is clearly demonstrated. can be understood.
以上のように、本発明は多重管バーナの火炎外
径を該バーナの原料吹出口直径の５〜20倍の範囲
内という、従来法よりも大きな倍率にしてガラス
微粒子の堆積を行なうことにより、堆積速度、收
率を共に向上して光フアイバ用多孔質母材を製造
できるという、経済性の高い実用的な製法であ
る。
As described above, the present invention deposits glass particles by setting the outer diameter of the flame of the multi-tube burner within a range of 5 to 20 times the diameter of the raw material outlet of the burner, which is larger than the conventional method. This is a highly economical and practical manufacturing method that can improve both deposition rate and yield to produce a porous base material for optical fibers.
第１図は多重管バーナーにおける最外周ポート
の内径（火炎外径）Ｄとガラス原料を流す最外ポ
ートの内径（原料吹出口直径）ｄの説明図、第２
図はＤ／ｄを３〜30の間で変化させたときのＤ／
ｄと堆積速度（ｇ／分）の関係を示すグラフ図、
第３図は本発明の実施例におけるＤ／ｄ＝10のと
きの原料（SiO2換算）投入量（ｇ／分）と堆積
速度（ｇ／分）の関係を示すグラフ図、第４図は
従来法のＤ／ｄ＝３のときの原料（SiO2換算）
投入量（ｇ／分）と堆積速度（ｇ／分）の関係を
示すグラフ図である。第５図は多重管バーナを用
いてガラス微粒子堆積体を形成する一般的な方法
の説明図である。
Figure 1 is an explanatory diagram of the inner diameter (flame outer diameter) D of the outermost port in a multi-tube burner and the inner diameter (raw material outlet diameter) d of the outermost port through which frit flows.
The figure shows D/d when D/d is varied between 3 and 30.
A graph diagram showing the relationship between d and deposition rate (g/min),
FIG. 3 is a graph showing the relationship between raw material (SiO 2 equivalent) input amount (g/min) and deposition rate (g/min) when D/d=10 in an example of the present invention, and FIG. Raw material when D/d=3 in conventional method (SiO 2 equivalent)
It is a graph diagram showing the relationship between input amount (g/min) and deposition rate (g/min). FIG. 5 is an explanatory diagram of a general method for forming a glass particle deposit using a multi-tube burner.
Claims (1)
給して、該バーナが形成する火炎中でガラス原料
を反応させることにより生成させたガラス微粒子
を堆積させて多孔質ガラス母材を製造する方法に
おいて、該多重管バーナの最外周ポート内径をガ
ラス原料を流す最外ポートの内径の５〜20倍の範
囲内として堆積することを特徴とする光フアイバ
用母材の製造方法。1. A method for producing a porous glass base material by supplying glass raw material from the central part of a multi-tube burner and depositing glass fine particles generated by reacting the glass raw material in a flame formed by the burner, A method for producing an optical fiber preform, characterized in that the inner diameter of the outermost port of the multi-tube burner is within a range of 5 to 20 times the inner diameter of the outermost port through which the glass raw material is passed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP249388A JPH01179737A (en) | 1988-01-11 | 1988-01-11 | Production of preform for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP249388A JPH01179737A (en) | 1988-01-11 | 1988-01-11 | Production of preform for optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01179737A JPH01179737A (en) | 1989-07-17 |
| JPH0435429B2 true JPH0435429B2 (en) | 1992-06-11 |
Family
ID=11530887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP249388A Granted JPH01179737A (en) | 1988-01-11 | 1988-01-11 | Production of preform for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01179737A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10258785B2 (en) | 2013-11-29 | 2019-04-16 | Conceptomed As | Disconnecting mechanisms |
-
1988
- 1988-01-11 JP JP249388A patent/JPH01179737A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01179737A (en) | 1989-07-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
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