CN104118986A - Method for manufacturing glass base metal - Google Patents
Method for manufacturing glass base metal Download PDFInfo
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- CN104118986A CN104118986A CN201410171601.9A CN201410171601A CN104118986A CN 104118986 A CN104118986 A CN 104118986A CN 201410171601 A CN201410171601 A CN 201410171601A CN 104118986 A CN104118986 A CN 104118986A
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- sintering
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- glass base
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- Manufacture, Treatment Of Glass Fibers (AREA)
- Glass Melting And Manufacturing (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Glass Compositions (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
Abstract
A method for manufacturing glass base metal is used for enabling multi-pore glass base metal to be transparent by sintering. In the method for manufacturing the glass base metal, the manufacturing cost is kept low as helium is utilized. According to the method for manufacturing the glass base metal, the glass base metal (3) composed of an effective part (3a) and a non-effective part (3b) are subjected to sintering for achieving transparency. The method comprises a first procedure of supplying helium (He) to a sintering furnace (1) and sintering the effective part (3a) at the same time, a second procedure of supplying at least one of nitrogen (N2) and argon (Ar) to the sintering furnace (1) and sintering the non-effective part (3b) at the same time.
Description
Technical field
The present invention relates to a kind of porous glass base material be carried out to sintering and the glass mother of transparence
The manufacture method of material.
Background technology
In the time making porous glass base material transparence, in the stove core barrel in sintering, conventionally flow into the helium as rare gas element.But, due to helium costliness, use helium can cause cost to rise, so require to reduce the usage quantity of helium.Following content is disclosed in TOHKEMY 2009-132585 communique: if furnace pressure changes less initial stage of sintering, can reduce the flow of the helium (He) flowing in stove, reduce thus manufacturing cost.But, in order further to reduce cost, and expect further to reduce the amount of helium using in the time making porous glass base material transparence.
Summary of the invention
The object of the present invention is to provide a kind of manufacture method of base glass material, it can reduce the usage quantity of helium, and manufacturing cost is suppressed lowlyer.
In order to solve problem, a kind of manufacture method of base glass material is provided, in this manufacture method, in sintering oven, the porous glass base material being made up of effective portion and non-effective portion is heated and sintering and transparence, the manufacture method of this base glass material comprises following operation: the 1st operation, in this operation, supply with helium in sintering oven in, effective portion is carried out to sintering; And the 2nd operation, in this operation, supply with at least one in nitrogen or argon gas in sintering oven in, non-effective portion is carried out to sintering.
Even because non-effective portion is sintered the part that does not also become optical fiber, so using nitrogen or argon gas to carry out after sintering, even if produce bubble, also the optical fiber that becomes product is not impacted.Therefore, can reduce manufacturing cost (cost of the gas that when sintering, entirety is used), and not damage the quality of obtained optical fiber.In addition, also can, in the 2nd operation, sneak into some helium.
Preferably after finishing, the 1st operation carries out the 2nd operation.Sometimes porous glass base material comprises non-effective portion at upper and lower ends, if but the part as non-effective portion was being carried out to sintering in nitrogen or argon gas before effective portion sintering, even if sometimes switch to helium for effective portion, also can cause producing bubble in effective portion.Therefore, by initial inflow helium, after effectively portion is sintered completely, switch at least one in nitrogen and argon gas, thereby can prevent from reliably producing bubble in effective portion.
Preferably in the 2nd operation, in sintering oven, only supply with nitrogen, and do not supply with helium.Thus, can further effectively reduce cost.
The effect of invention
According to the present invention, can reduce the usage quantity of helium, manufacturing cost is suppressed lowlyer.
Brief description of the drawings
Fig. 1 is the summary construction diagram of an example of the sintering oven that uses in the manufacture method of base glass material of the present invention, represents effective portion of base glass material to carry out the state of sintering.
Fig. 2 is the summary construction diagram of an example of the sintering oven that uses in the manufacture method of base glass material of the present invention, represents the non-effective portion of base glass material to carry out the state of sintering.
Embodiment
Porous glass base material is carried out to sintering when transparence, conventionally make gas solubility in glass larger, flow in stove core barrel as the helium of rare gas element.Use other rare gas elementes such as cheap nitrogen or argon gas etc. if replace helium, sometimes have problems such as producing bubble.
It is that effective portion and the part of not carrying out fiberize (not becoming product) are non-effective portion that the inventor is conceived in porous glass base material to exist the part of carrying out fiberize (becoming product).If make non-effective portion keep unsintered state,, in the time of the wire drawing of effective portion thereafter, non-effective portion carries out sintering, produces the problems such as mother metal distortion, therefore, need to make non-effective portion also carry out sintering.On the other hand, even produce bubble etc. in the glass of non-effective portion, because non-effective portion does not carry out wire drawing, therefore (becoming product) optical fiber self of manufacturing can not have problems.
Like this, the inventor found during the non-effective portion in porous glass base material is carried out to sintering after conscientiously studying, and substitutes helium and uses the manufacture method of cheap nitrogen (or argon gas).Thus, can, under the state of the quality of the optical fiber of maintenance manufacturing, reduce manufacturing cost.
With reference to accompanying drawing, the concrete example of the manufacture method of the related base glass material of embodiments of the present invention is described below.In addition, the present invention is not limited to these and illustrates, but by shown in claims, comprises the whole changes in content and the scope thereof being equal to claims.
Fig. 1 and Fig. 2 are the summary construction diagrams of an example of the sintering oven that uses in the manufacture method of base glass material of the present invention, and Fig. 1 is the state that effective portion of base glass material is carried out to sintering, and Fig. 2 is the state that the non-effective portion of base glass material is carried out to sintering.Sintering oven 1 heats and sintering and transparence porous glass base material 3.Sintering oven 1 has: stove core barrel 2, well heater 4, gas are supplied with stream 5, the 1st intake valve the 6, the 2nd intake valve 7, exhaust stream 8 and vent valve 8a.
Stove core barrel 2 is the pipes that are formed as round-ended cylinder shape that for example make porous glass base material 3 insert.On the lid 9 of stove core barrel 2, there is the opening 11 that the support stick 10 extending upward from the upper end of porous glass base material 3 can be inserted free lifting.
Well heater 4 heats the porous glass base material 3 being inserted in stove core barrel 2.Be connected with gas supplies with stream 5 in the bottom of stove core barrel 2.Supply with being provided with stream 5 midway at gas: the 1st intake valve 6, it is at the nitrogen (N of subtend stove core barrel 2 interior supplies
2) gas or argon (Ar) gas opens while supplying with; And the 2nd intake valve 7, it opens in the time supplying with helium (He) gas.In addition, on the perisporium of the upper end side of stove core barrel 2, connect the stream 8 for exhaust for discharging furnace gas, be provided with vent valve 8a midway in exhaust with stream 8.In addition, a part for the gas of supplying with to stove core barrel 2, discharges to outside from the gap between support stick 10 and opening 11.
To the porous glass base material 3 inserting in the stove core barrel 2 of sintering oven 1, having the part of carrying out fiberize is that effective 3a of portion and the part of not carrying out fiberize are the non-effective 3b of portion.Effectively the 3a of portion has the part that becomes fiber core and the part that becomes covering, is the part that becomes product.In addition,, in Fig. 1 and Fig. 2, the non-effective 3b of portion is positioned at the part of top compared with dotted line in porous glass base material 3, but sometimes also may have bottom non-effective portion.
Below, the manufacture method of the base glass material to present embodiment describes.First, as shown in Figure 1, the interior insertion of stove core barrel 2 by porous glass base material 3 to sintering oven 1.At this moment, the bottom of porous glass base material 3 (, the sintering starting end of effective 3a of portion) is configured in to the At The Height of well heater 4 upper ends.
(the 1st operation)
First, implement the 1st operation.Under the state of closing at the 1st intake valve 6, open the 2nd intake valve 7, supply with stream 5 as sintering rare gas element and to the interior supply helium of stove core barrel 2 from gas.At this moment, the supply extraction flow of helium is adjusted, so that become malleation in stove.By the heating that utilizes well heater 4 to specify, thereby make the effective 3a of portion sintering of porous glass base material 3 in the atmosphere of helium.As noted above, in making effective 3a of portion start to carry out sintering from its lower end side, the position that little by little reduces porous glass base material 3.Then, as shown in Figure 2, for example, if the position at the interior suspension porous glass base material 3 of stove core barrel 2 arrives prescribed position (, the position identical with the height of well heater 4 lower ends, the non-effective 3b of portion lower end), effectively the 3a of portion entirety becomes the state being sintered completely.
(the 2nd operation)
Then, implement the 2nd operation.Close the 2nd intake valve 7 and open the 1st intake valve 6, to the interior supply nitrogen of stove core barrel 2 or argon gas.In addition,, even switch to nitrogen or argon gas from helium, in order to prevent sneaking into extraneous gas in stove, also must keep in stove is malleation.Therefore,, in the nitrogen or argon gas of supply and the roughly the same amount of helium, pressure is adjusted.Then, by the heating that utilizes well heater 4 to specify in the atmosphere of nitrogen or argon gas, thereby make the non-effective 3b of portion of porous glass base material 3 carry out sintering.
Like this, integral sintered by porous glass base material 3, obtains the base glass material of transparence.According to the manufacture method of the base glass material of present embodiment, carry out compared with the situation of sintering with only make porous glass base material 3 entirety in helium, the usage quantity of helium can be reduced to 1/8～1/10, manufacturing cost is reduced to about 10%.
In addition, in the above-described embodiment, for thering is effective portion in bottom, the example on top with non-effective portion narrates, but sometimes also have non-effective portion in the bottom of base glass material.In the case, if non-effective portion is carried out after sintering in nitrogen or argon gas at first, switch gas and flow into helium and effective portion is carried out to sintering, cause effectively producing bubble in portion.Therefore, before effective portion is carried out to sintering, must under the state that does not flow into nitrogen or argon gas, carry out sintering, in the case, even non-effective portion also need to carry out sintering in helium.
In addition, due to nitrogen low price compared with argon gas, so in the above-described embodiment, say from cost, use nitrogen more favourable compared with argon gas.In addition, in the 2nd operation, also can nitrogen or argon gas not used separately, and nitrogen and argon gas are mixed to supply.In addition, also can mix the helium of a tittle, but as noted above, only use the mode of nitrogen to say favourable from cost.
In addition, in the manufacture method of the base glass material of above-mentioned embodiment, in effective 3a of portion of porous glass base material 3 and the boundary portion office of the non-effective 3b of portion, produce the sintering that the sintering of effective 3a of portion is finished to side end and the non-effective 3b of portion and start side end and carry out simultaneously the time band of sintering.Can in entering this band, be converted to the 2nd operation time, the gas of supply is switched to nitrogen or argon gas and starts the sintering of the non-effective 3b of portion from helium, also can little by little increase the ratio of nitrogen or argon gas.
Claims (3)
1. a manufacture method for base glass material in this manufacture method, heats and sintering and transparence the porous glass base material being made up of effective portion and non-effective portion in sintering oven,
In the manufacture method of this base glass material, comprise following operation:
The 1st operation, in this operation, supply with helium in described sintering oven in, carries out sintering to described effective portion; And
The 2nd operation, in this operation, supply with at least one in nitrogen and argon gas in described sintering oven in, carries out sintering to described non-effective portion.
2. the manufacture method of base glass material according to claim 1, wherein,
After finishing, described the 1st operation carries out described the 2nd operation.
3. the manufacture method of base glass material according to claim 1 and 2, wherein,
In described the 2nd operation, in described sintering oven, only supply with nitrogen, and do not supply with helium.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-094258 | 2013-04-26 | ||
| JP2013094258A JP6191222B2 (en) | 2013-04-26 | 2013-04-26 | Manufacturing method of glass base material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104118986A true CN104118986A (en) | 2014-10-29 |
| CN104118986B CN104118986B (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410171601.9A Active CN104118986B (en) | 2013-04-26 | 2014-04-25 | The manufacturing method of base glass material |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6191222B2 (en) |
| CN (1) | CN104118986B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07287131A (en) * | 1994-04-19 | 1995-10-31 | Sumitomo Electric Ind Ltd | Production of glass preform for optical fiber |
| JP2003137583A (en) * | 2001-10-25 | 2003-05-14 | Furukawa Electric Co Ltd:The | Method for manufacturing optical fiber preform |
| CN1781863A (en) * | 2004-11-26 | 2006-06-07 | 住友电气工业株式会社 | Equipment and method for manufacturing a glass preform |
| JP2010013328A (en) * | 2008-07-04 | 2010-01-21 | Sumitomo Electric Ind Ltd | Method and apparatus for manufacturing optical fiber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6272537A (en) * | 1985-09-25 | 1987-04-03 | Asahi Glass Co Ltd | Production of high-purity quartz glass |
-
2013
- 2013-04-26 JP JP2013094258A patent/JP6191222B2/en active Active
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2014
- 2014-04-25 CN CN201410171601.9A patent/CN104118986B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07287131A (en) * | 1994-04-19 | 1995-10-31 | Sumitomo Electric Ind Ltd | Production of glass preform for optical fiber |
| JP2003137583A (en) * | 2001-10-25 | 2003-05-14 | Furukawa Electric Co Ltd:The | Method for manufacturing optical fiber preform |
| CN1781863A (en) * | 2004-11-26 | 2006-06-07 | 住友电气工业株式会社 | Equipment and method for manufacturing a glass preform |
| JP2010013328A (en) * | 2008-07-04 | 2010-01-21 | Sumitomo Electric Ind Ltd | Method and apparatus for manufacturing optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6191222B2 (en) | 2017-09-06 |
| JP2014214066A (en) | 2014-11-17 |
| CN104118986B (en) | 2018-12-21 |
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