JPH04299101A - Method for cutting processing of beta alumina pipe - Google Patents
Method for cutting processing of beta alumina pipeInfo
- Publication number
- JPH04299101A JPH04299101A JP9159091A JP9159091A JPH04299101A JP H04299101 A JPH04299101 A JP H04299101A JP 9159091 A JP9159091 A JP 9159091A JP 9159091 A JP9159091 A JP 9159091A JP H04299101 A JPH04299101 A JP H04299101A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- beta
- water
- alumina tube
- pure water
- 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.)
- Granted
Links
- 229910000873 Beta-alumina solid electrolyte Inorganic materials 0.000 title claims abstract description 57
- 238000005520 cutting process Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000004140 cleaning Methods 0.000 claims description 16
- 239000002826 coolant Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 abstract description 3
- 239000007784 solid electrolyte Substances 0.000 abstract description 3
- 239000003960 organic solvent Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- Y02E60/12—
Landscapes
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Secondary Cells (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、アルカリ成分を含むベ
ータアルミナ管を電気抵抗特性の増大を発生させること
なく安定して切断加工することができる湿式によるベー
タアルミナ管の切断加工方法に関するものである。
【０００２】
【従来の技術】例えば、ナトリウム−硫黄電池の固体電
解質管として用いられるベータアルミナ管は、電池の耐
久性に大きな影響を及ぼすために一定値以下の低い電気
抵抗特性が必要とされている。そして、そのような所定
の特性値を確保するためにベータアルミナ管の切断加工
においては切断中のアルカリ成分溶出を防止する必要性
からオイルを冷却媒体として使用し、その後アセトン等
の有機溶媒による洗浄を施す湿式の切断加工方法が行わ
れていた。
【０００３】ところが、前記のようなベータアルミナ管
の切断加工方法においては使用するオイルや有機溶媒に
よって作業環境が悪化するという問題点があり、また、
それらの保管や廃棄等の取扱い規制から特別の設備等を
設ける必要があって設備費が増大するという問題点があ
った。また、上記のような湿式のベータアルミナ管の切
断加工方法においても冷却媒体として一般の切断加工と
同様取扱の容易な水を使用することも考えられるが、水
はベータアルミナ管のアルカリ成分の溶出を促進して電
気抵抗特性を満足させることができないという問題点が
あり、実用化されていなかった。
【０００４】
【発明が解決しようとする課題】本発明は上記のような
従来の問題点を解決して、電気抵抗特性の増大を発生さ
せることなく安定して切断加工することができるととも
に、短い処理時間で効率よく切断加工することができ、
また作業環境の悪化を生ずることもないベータアルミナ
管の切断加工方法を提供することを目的として完成され
たものである。
【０００５】
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明はベータアルミナ管を水を冷却材と
して切断する工程で水に純水を用い、切断時における純
水とベータアルミナ管との接触時間を１０分以内とした
ことを特徴とするベータアルミナ管の切断加工方法を第
１の発明とし、ベータアルミナ管を水を冷却材として切
断および洗浄する工程の少なくとも洗浄工程で水に純水
を用い、切断時と洗浄時における純水とベータアルミナ
管との接触時間の合計を１０分以内としたことを特徴と
するベータアルミナ管の切断加工方法を第２の発明とし
、ベータアルミナ管の切断個所を除く表面を不透水性材
料で覆ったうえ切断個所を水で冷却しつつ切断すること
を特徴とするベータアルミナ管の切断加工方法を第３の
発明とするものである。
【０００６】以下、本発明を図面を参照しつつ詳細に説
明する。図面は本発明の切断工程の一例を示すもので、
図中１はナトリウム−硫黄電池の固体電解質管として用
いられる筒状のベータアルミナ管、２は内径チャック方
式の固定治具、３は前記ベータアルミナ管１を切断する
ダイヤモンドホイール等のカッターである。
【０００７】前記のベータアルミナ管１は、５００ 〜
６００ ｒｐｍ の速度で回転される固定治具２に保持
させて回転させるとともに、所定の切断個所を２０００
ｒｐｍ 程度で回転するカッター３により切断加工する
。この場合、切断個所には該切断個所に向けて開口する
ノズル５より純水を供給し続け、純水を冷却媒体としな
がら切断加工が行われることとなる。前記の純水（イオ
ン交換水でもよい）は水温が２０℃以下であって、該純
水とベータアルミナ管１との接触時間が５分以内の範囲
で切断加工を施すものであり、これにより上記の供給し
続けられる純水によって切断時におけるベータアルミナ
管表面のアルカリが溶出することを有効に防止できる。
なお図中、４は切断箇所を除く外表面全体を覆うゴムチ
ューブ等からなる不透水性材料４である。
【０００８】このようにして所要の個所で切断加工を行
ったならば、次に、得られたベータアルミナ管１の切断
面を純水により洗浄する。この洗浄工程は、例えば水温
２０℃以下の純粋のジェット噴射により、あるいは超音
波洗浄等により５分以内の時間で行われるもので、これ
により洗浄水によるベータアルミナ管表面のアルカリ成
分の溶出を有効に防止しながら洗浄することができる。
そして、洗浄後のベータアルミナ管１は電気乾燥器や誘
電乾燥器により速やかに乾燥処理して全ての工程を終了
する。なお、前記の切断工程から洗浄工程に入るまでの
付着水によるベータアルミナ管と付着水との接触時間、
および洗浄工程から乾燥工程に入るまでのベータアルミ
ナ管と付着水との接触時間の合計が６０分以内であれば
ベータアルミナ管表面のアルカリ成分の付着水への溶出
量は、ベータアルミナ管の電気特性に実用上問題ない程
度に防止されることとなり好ましい。また、少なくとも
洗浄工程で使用する水を純水とすることにより、ベータ
アルミナ管表面へのＣａ 、Ｋ等の不純物の付着が防止
され、単電池として組立てられたベータアルミナ管の電
気特性への悪影響を防止できることとなり好ましい。ま
た、切断工程において水道水を用い、洗浄工程では有機
溶媒を用いてもベータアルミナ管表面への不純物の付着
が除去されるため好ましい。
【０００９】以上のようにして水を使用して切断加工さ
れたベータアルミナ管１は、洗浄工程が純水か純度の高
い有機溶媒であり、しかも、水とベータアルミナ管１と
の接触時間も極めて短いので、ベータアルミナ管１のア
ルカリ成分の溶出が有効に防止されることとなる。この
結果、ベータアルミナ管の電気抵抗特性の増大が防止さ
れ優れた特性を有するベータアルミナ管１が得られるこ
とが確認できた。
【００１０】
【実施例】実施例１として外径５０ｍｍ、内径４６ｍｍ
、全長６００ｍｍ のベータアルミナ管を全長が５５０
ｍｍ となるよう端部を切断加工するに際して、切断個
所に１５℃の純水を供給しつつ４分間で切断処理をし、
同様の純水で５分間の超音波洗浄をした後、電気乾燥器
で２００℃・２０分間の乾燥処理をした。また、実施例
２として実施例１と同形状のベータアルミナ管を図１に
示されるように予め切断個所以外の外表面をゴムチュー
ブで覆い、表１に示す条件で切断、洗浄加工した。更に
、実施例３〜８として表１に示す条件で切断、洗浄加工
した。得られたベータアルミナ管の電気抵抗特性は、表
１に示されるように従来のオイルとアセトンを用いて切
断および洗浄して得られたものと同等の特性値を有し、
品質的に優れたものであることが確認できた。なお、表
中の４端子抵抗は２ ×２ ×４００ｍｍ 片の両端に
電極をつけ３３０ ℃で電気抵抗を測定したものである
。また、比較例として表２に示した条件により切断、洗
浄加工した場合に得られたベータアルミナ管の特性を示
したが、いずれも品質的に満足できないものであった。
【表１】
【表２】
【００１１】
【発明の効果】以上の説明からも明らかなように本発明
は、電気抵抗特性の増大を発生させることなく安定して
切断加工することができるとともに、短い処理時間で効
率よく切断加工することができ、また、作業環境の悪化
を生ずることもない。更には、オイルや有機溶媒を使用
する場合のような保管・廃棄用の特別な設備等を設ける
必要もなく優れた経済性を発揮できるという利点もある
。よって、本発明は従来の問題点を一掃したベータアル
ミナ管の切断加工方法として産業の発展に寄与するとこ
ろは極めて大である。
【００１２】Detailed Description of the Invention [0001] [Industrial Application Field] The present invention is a wet method capable of stably cutting beta alumina tubes containing alkaline components without causing an increase in electrical resistance characteristics. The present invention relates to a method for cutting beta alumina tubes. [0002] For example, beta alumina tubes used as solid electrolyte tubes in sodium-sulfur batteries are required to have low electrical resistance characteristics below a certain value because they have a large effect on the durability of the battery. There is. In order to ensure such predetermined characteristic values, oil is used as a cooling medium in the cutting process of beta alumina tubes to prevent the elution of alkaline components during cutting, and then cleaning is performed with an organic solvent such as acetone. A wet cutting method was used. However, the above method for cutting beta alumina tubes has the problem that the working environment deteriorates due to the oil and organic solvent used.
There is a problem in that special equipment needs to be installed due to handling regulations such as storage and disposal, which increases equipment costs. In addition, in the wet beta alumina tube cutting method as described above, it is possible to use water as a cooling medium, which is easy to handle as in general cutting, but water can cause the alkaline components of the beta alumina tube to elute. However, it has not been put into practical use due to the problem that it is not possible to promote electrical resistance and satisfy electrical resistance characteristics. Problem to be Solved by the Invention The present invention solves the above-mentioned conventional problems, allows stable cutting without increasing electrical resistance characteristics, and allows for short cutting. Cutting can be done efficiently within the processing time,
Furthermore, the present invention was completed with the aim of providing a method for cutting beta alumina tubes that does not cause deterioration of the working environment. Means for Solving the Problems The present invention, which has been made to solve the above problems, uses pure water in the process of cutting beta alumina tubes using water as a coolant, and uses pure water at the time of cutting. The first invention provides a method for cutting a beta alumina tube, characterized in that the contact time between the beta alumina tube and the beta alumina tube is within 10 minutes, and at least the cleaning step of cutting and cleaning the beta alumina tube using water as a coolant. A second invention provides a method for cutting a beta alumina tube, characterized in that pure water is used in the process and the total contact time between the pure water and the beta alumina tube during cutting and cleaning is within 10 minutes. A third invention provides a method for cutting a beta alumina tube, which comprises covering the surface of the beta alumina tube except for the cut point with a water-impermeable material and cutting the beta alumina tube while cooling the cut point with water. It is. The present invention will be explained in detail below with reference to the drawings. The drawing shows an example of the cutting process of the present invention.
In the figure, 1 is a cylindrical beta-alumina tube used as a solid electrolyte tube for a sodium-sulfur battery, 2 is an internal chuck type fixing jig, and 3 is a cutter such as a diamond wheel for cutting the beta-alumina tube 1. [0007] The beta alumina tube 1 has a diameter of 500~
The fixing jig 2 is held and rotated at a speed of 600 rpm, and a predetermined cutting point is cut at a speed of 2000 rpm.
Cutting is performed using a cutter 3 that rotates at approximately rpm. In this case, pure water is continuously supplied to the cutting location from the nozzle 5 that opens toward the cutting location, and the cutting process is performed while using the pure water as a cooling medium. The pure water (ion-exchanged water may also be used) has a water temperature of 20°C or lower, and the cutting process is performed within a range of 5 minutes or less for the contact time between the pure water and the beta alumina tube 1. The continuous supply of pure water effectively prevents the alkali on the surface of the beta alumina tube from being eluted during cutting. In the figure, 4 is a water-impermeable material 4 made of a rubber tube or the like that covers the entire outer surface except for the cut portion. [0008] After cutting has been performed at the required locations in this manner, the cut surface of the obtained beta alumina tube 1 is then washed with pure water. This cleaning process is carried out within 5 minutes, for example, by pure jet spray at a water temperature of 20°C or lower, or by ultrasonic cleaning, etc., and is effective in eluting alkaline components from the surface of the beta alumina tube with the cleaning water. It can be washed while preventing it. After cleaning, the beta alumina tube 1 is quickly dried using an electric dryer or a dielectric dryer to complete all steps. In addition, the contact time between the beta alumina tube and the adhered water from the cutting process to the cleaning process,
If the total contact time between the beta alumina tube and the adhered water from the cleaning process to the drying process is within 60 minutes, the amount of alkaline components on the surface of the beta alumina tube eluted into the adhered water will be reduced by the electricity of the beta alumina tube. This is preferable because it can be prevented to the extent that there is no practical problem with the characteristics. In addition, by using pure water at least in the cleaning process, impurities such as Ca and K can be prevented from adhering to the surface of the beta alumina tube, which could adversely affect the electrical properties of the beta alumina tube assembled as a single cell. This is preferable because it can prevent this. It is also preferable to use tap water in the cutting step and to use an organic solvent in the washing step, since impurities adhering to the surface of the beta alumina tube can be removed. The beta-alumina tube 1 cut using water as described above is washed with pure water or a highly purified organic solvent, and the contact time between water and the beta-alumina tube 1 is also shortened. Since it is extremely short, elution of alkaline components from the beta alumina tube 1 is effectively prevented. As a result, it was confirmed that an increase in the electrical resistance characteristics of the beta alumina tube was prevented and a beta alumina tube 1 having excellent characteristics could be obtained. [Example] Example 1 has an outer diameter of 50 mm and an inner diameter of 46 mm.
, a beta alumina tube with a total length of 600 mm and a total length of 550 mm.
When cutting the end to a diameter of 2 mm, the cutting process was carried out for 4 minutes while supplying pure water at 15°C to the cutting area.
After performing ultrasonic cleaning for 5 minutes using the same pure water, drying was performed at 200° C. for 20 minutes using an electric dryer. In addition, as Example 2, a beta alumina tube having the same shape as Example 1 was cut and cleaned under the conditions shown in Table 1, with the outer surface other than the cut point covered with a rubber tube in advance as shown in FIG. Further, as Examples 3 to 8, cutting and cleaning were performed under the conditions shown in Table 1. As shown in Table 1, the electrical resistance characteristics of the obtained beta-alumina tube are equivalent to those obtained by cutting and cleaning using conventional oil and acetone.
It was confirmed that the quality was excellent. Note that the four-terminal resistance in the table is the electrical resistance measured at 330° C. by attaching electrodes to both ends of a 2 × 2 × 400 mm piece. Furthermore, as a comparative example, the characteristics of beta alumina tubes obtained when cutting and cleaning were performed under the conditions shown in Table 2 were shown, but all of them were unsatisfactory in terms of quality. [Table 1] [Table 2] [Effects of the Invention] As is clear from the above explanation, the present invention enables stable cutting without causing an increase in electrical resistance characteristics, and Cutting can be performed efficiently in a short processing time, and the working environment does not deteriorate. Furthermore, there is also the advantage that there is no need to provide special equipment for storage and disposal, which is required when oil or organic solvents are used, and excellent economic efficiency can be achieved. Therefore, the present invention greatly contributes to the development of industry as a beta alumina tube cutting method that eliminates the conventional problems. 0012
【図面の簡単な説明】[Brief explanation of drawings]
【図１】本発明の実施例の切断工程を示す一部切欠正面
図である。FIG. 1 is a partially cutaway front view showing a cutting process in an embodiment of the present invention.
１ ベータアルミナ管 ２ 固定治具 ３ カッター ４ 不透水性材料 ５ ノズル 1 Beta alumina tube 2 Fixing jig 3 Cutter 4. Water impermeable material 5 Nozzle
Claims (3)
切断する工程で水に純水を用い、切断時における純水と
ベータアルミナ管との接触時間を１０分以内としたこと
を特徴とするベータアルミナ管の切断加工方法。1. A beta method, characterized in that pure water is used in the process of cutting the beta alumina tube using water as a coolant, and the contact time between the pure water and the beta alumina tube during cutting is 10 minutes or less. How to cut alumina tube.
切断および洗浄する工程の少なくとも洗浄工程で水に純
水を用い、切断時と洗浄時における純水とベータアルミ
ナ管との接触時間の合計を１０分以内としたことを特徴
とするベータアルミナ管の切断加工方法。[Claim 2] Pure water is used as the water at least in the cleaning step of cutting and cleaning the beta alumina tube using water as a coolant, and the total contact time between the pure water and the beta alumina tube during cutting and cleaning is calculated. A method for cutting a beta alumina tube, characterized in that the cutting time is within 10 minutes.
面を不透水性材料で覆ったうえ切断個所を水で冷却しつ
つ切断することを特徴とするベータアルミナ管の切断加
工方法。3. A method for cutting a beta-alumina tube, which comprises covering the surface of the beta-alumina tube except for the cut point with a water-impermeable material, and cutting the tube while cooling the cut point with water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9159091A JPH0790548B2 (en) | 1991-03-28 | 1991-03-28 | Beta alumina tube cutting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9159091A JPH0790548B2 (en) | 1991-03-28 | 1991-03-28 | Beta alumina tube cutting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04299101A true JPH04299101A (en) | 1992-10-22 |
| JPH0790548B2 JPH0790548B2 (en) | 1995-10-04 |
Family
ID=14030767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9159091A Expired - Lifetime JPH0790548B2 (en) | 1991-03-28 | 1991-03-28 | Beta alumina tube cutting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0790548B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06335918A (en) * | 1993-03-29 | 1994-12-06 | Ngk Insulators Ltd | Apparatus and method for work-chuck in ceramic processing machine, and method for processing of work |
| JP2009096146A (en) * | 2007-10-19 | 2009-05-07 | Ngk Insulators Ltd | Manufacturing method of ceramic sintered body |
| WO2025215830A1 (en) * | 2024-04-12 | 2025-10-16 | 日本碍子株式会社 | Processing system |
-
1991
- 1991-03-28 JP JP9159091A patent/JPH0790548B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06335918A (en) * | 1993-03-29 | 1994-12-06 | Ngk Insulators Ltd | Apparatus and method for work-chuck in ceramic processing machine, and method for processing of work |
| JP2009096146A (en) * | 2007-10-19 | 2009-05-07 | Ngk Insulators Ltd | Manufacturing method of ceramic sintered body |
| WO2025215830A1 (en) * | 2024-04-12 | 2025-10-16 | 日本碍子株式会社 | Processing system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0790548B2 (en) | 1995-10-04 |
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