JP2871440B2 - Manufacturing method of chemically strengthened glass - Google Patents
Manufacturing method of chemically strengthened glassInfo
- Publication number
- JP2871440B2 JP2871440B2 JP6018055A JP1805594A JP2871440B2 JP 2871440 B2 JP2871440 B2 JP 2871440B2 JP 6018055 A JP6018055 A JP 6018055A JP 1805594 A JP1805594 A JP 1805594A JP 2871440 B2 JP2871440 B2 JP 2871440B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- chemically strengthened
- aqueous solution
- strengthened glass
- lithium
- 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
- 239000005345 chemically strengthened glass Substances 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000011521 glass Substances 0.000 claims description 29
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical group [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 10
- 229910001414 potassium ion Inorganic materials 0.000 claims description 8
- 229910003002 lithium salt Inorganic materials 0.000 claims description 6
- 159000000002 lithium salts Chemical class 0.000 claims description 6
- 229910001415 sodium ion Inorganic materials 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 5
- 238000005342 ion exchange Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003426 chemical strengthening reaction Methods 0.000 description 2
- 239000005329 float glass Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 235000010333 potassium nitrate Nutrition 0.000 description 2
- 239000004323 potassium nitrate Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、化学的耐久性が改善さ
れた化学強化ガラスを製造する方法に関する。更に詳述
すると、アルカリ成分を含有するたとえばソーダライム
シリカ組成のガラス素板から化学的耐久性が優れた化学
強化ガラスを製造するのに好適な方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a chemically strengthened glass having improved chemical durability. More specifically, the present invention relates to a method suitable for producing a chemically strengthened glass having excellent chemical durability from a glass base plate containing an alkali component, for example, a soda lime silica composition.
【０００２】[0002]
【従来の技術】従来、磁気ディスク用のガラス基板とし
ては、窓ガラス等の用途に大量に製造されているソーダ
ライムシリカ組成のフロートガラス板を化学強化したも
のが用いられている。すなわち、このフロートガラス板
をカリウムイオンを含有する溶融塩に漬けて溶融塩中の
カリウムイオンとガラス中のナトリウムイオンとのイオ
ン交換により化学強化ガラスとし、その後金属膜、合金
膜等をそのガラス板上に被覆した磁気記録媒体や光記録
媒体が知られている。2. Description of the Related Art Conventionally, as a glass substrate for a magnetic disk, a glass substrate obtained by chemically strengthening a float glass plate having a soda-lime-silica composition, which is mass-produced for window glass or the like, is used. That is, this float glass plate is immersed in a molten salt containing potassium ions to form a chemically strengthened glass by ion exchange between potassium ions in the molten salt and sodium ions in the glass. Magnetic recording media and optical recording media coated thereon are known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ソーダライムシリカ組成のガラス板は、硼珪酸塩ガラ
ス、アルミノ珪酸塩ガラス、石英ガラス等に比較すると
安価に入手できるという利点を有するものの、そのガラ
スの化学的耐久性は必ずしも満足できるものではない。
本発明の目的は、優れた化学的耐久性を有する化学強化
ガラスを製造する方法を提供するにある。However, the glass plate having the above-mentioned soda-lime silica composition has an advantage that it can be obtained at a lower cost than borosilicate glass, aluminosilicate glass, quartz glass and the like. Is not always satisfactory.
An object of the present invention is to provide a method for producing a chemically strengthened glass having excellent chemical durability.
【０００４】[0004]
【課題を解決するための手段】本発明は、アルカリ成分
としてナトリウムイオンを含有するガラスを、カリウム
イオンを含有する溶融塩に接触させてナトリウムイオン
とカリウムイオンとのイオン交換により前記ガラス板表
面に圧縮層を形成し、その後前記ガラス板表面をリチウ
ム塩水溶液に接触させる化学強化ガラスの製造方法であ
る。According to the present invention, a glass containing sodium ions as an alkali component is brought into contact with a molten salt containing potassium ions and ion exchange between sodium ions and potassium ions is carried out on the surface of the glass plate. This is a method for producing chemically strengthened glass in which a compression layer is formed, and then the surface of the glass plate is brought into contact with a lithium salt aqueous solution.
【０００５】カリウムイオン含む溶融塩中でガラス表面
近傍のナトリウムイオンをカリウムイオンに置換した
後、リチウム塩水溶液中で溶融塩を溶解し、さらに、別
のリチウム塩水溶液中に浸漬することにより、ガラスの
化学的耐久性が大幅に向上する。用いるリチウム塩とし
ては、硝酸リチウム、硫酸リチウムが好んで用いられ
る。なかでも硝酸リチウムが好ましい。硝酸リチウム水
溶液の硝酸リチウム濃度は、１０ー4のモル／リットル以
上とするのが好ましく、１モル／リットル以上の濃度と
しても化学的耐久性は濃度に応じて増大しないので、１
０ー4〜１モル／リットルの濃度範囲とするのが好まし
い。さらに１０-2〜１モル／リットルの範囲とするのが
好ましい。[0005] After replacing sodium ions near the glass surface with potassium ions in a molten salt containing potassium ions, the molten salt is dissolved in an aqueous solution of lithium salt, and then immersed in another aqueous solution of lithium salt. The chemical durability is greatly improved. As the lithium salt to be used, lithium nitrate and lithium sulfate are preferably used. Of these, lithium nitrate is preferred. Since lithium nitrate concentration of lithium nitrate solution is preferably 10 -4 mol / l or more, chemical durability as the concentration of more than 1 mole / liter does not increase depending on the concentration, 1
0 preferably in the concentration range of over 4 to 1 mole / liter. It is more preferably in the range of 10 -2 to 1 mol / l.
【０００６】[0006]
【作用】溶融塩を用いたイオン交換反応により化学強化
されたガラス表面は、非常に活性であり、水溶液に触れ
るとアルカリ金属イオンと水素イオンとのイオン交換反
応が行われ、一定量の水和層がガラス表面に形成され表
面が安定化する。この安定化がリチウムイオンが存在す
る水溶液中で行われると、リチウムイオンがガラス表面
に固定され、ガラス表面に耐候性の強い層を形成する。
これによりガラス表面の高温高湿度雰囲気下の化学的耐
久性が向上し、ガラス表面にヤケの発生が抑制される。The glass surface chemically strengthened by the ion exchange reaction using a molten salt is extremely active. When it comes into contact with an aqueous solution, the ion exchange reaction between alkali metal ions and hydrogen ions takes place, and a certain amount of hydration occurs. A layer is formed on the glass surface to stabilize the surface. When this stabilization is performed in an aqueous solution in which lithium ions are present, the lithium ions are fixed to the glass surface, and a layer having strong weather resistance is formed on the glass surface.
As a result, the chemical durability of the glass surface in a high-temperature, high-humidity atmosphere is improved, and the occurrence of burns on the glass surface is suppressed.
【０００７】[0007]
実施例１ 縦５ｃｍ横５ｃｍ厚さ２ｍｍのソーダライムシリカ組成
のガラス（主要な成分が重量％でＳｉ2Ｏ７２、Ａｌ2Ｏ
3１．７、ＣａＯ８、ＭｇＯ４、Ｎａ2Ｏ１３、Ｋ2Ｏ
０．９含む）を４００℃の雰囲気中で１０分間加熱した
後、４５０℃の溶融硝酸カリウム中に１０時間漬け、化
学強化処理を施した。溶融塩からガラスを取り出し時に
は、３５０℃、３００℃、２００℃で、それぞれ５０分
間の除冷を行なった。このガラスを４５℃、１０-2モル
／リットルの硝酸リチウム水溶液に１０分間漬け、付着
していた硝酸カリウムを除去し、その後新たに用意した
別の１０-2モル／リットルの硝酸リチウム水溶液に８０
℃で１４時間漬けた。水溶液からガラスを取り出し、超
音波洗浄し、乾燥してサンプル１を得た。Si 2 O72, Al 2 O glass (weight% major component of soda lime silica composition of Example 1 Vertical 5cm horizontal 5cm thickness 2mm
3 1.7, CaO8, MgO4, Na 2 O13, K 2 O
Was heated in a 400 ° C. atmosphere for 10 minutes, and then immersed in 450 ° C. molten potassium nitrate for 10 hours to perform a chemical strengthening treatment. When the glass was taken out of the molten salt, cooling was performed at 350 ° C., 300 ° C., and 200 ° C. for 50 minutes each. This glass was immersed in a 10-2 mol / L aqueous solution of lithium nitrate at 45 ° C for 10 minutes to remove the attached potassium nitrate, and then added to another newly prepared 10-2 mol / L aqueous lithium nitrate solution.
Soak at 14 ° C for 14 hours. The glass was taken out of the aqueous solution, ultrasonically washed, and dried to obtain Sample 1.
【０００８】一方、比較サンプル１として、同様の化学
強化処理を行い、その後純水によりガラス表面に付着し
ている溶融塩を溶解し、洗浄乾燥した。上記処理を行な
ったサンプル１と比較サンプル１を、温度８０℃、相対
湿度８０％の条件下に５日間放置した。取り出した後、
ガラス表面を純水で洗い流して、ガラス表面に発生した
ヤケのアルカリ成分を水に溶解補集した。この水溶液中
に含まれるアルカリ金属（Ｌｉ、Ｋ）を定量分析し、ア
ルカリ元素酸化物の重量として表１に示す。Ｌｉは、い
ずれのサンプルにも検出されなかった。また、得られた
ガラスは強度が向上していた。On the other hand, as Comparative Sample 1, the same chemical strengthening treatment was performed, and then the molten salt adhering to the glass surface was dissolved with pure water, and the glass was washed and dried. The sample 1 and the comparative sample 1 subjected to the above treatment were left for 5 days under the conditions of a temperature of 80 ° C. and a relative humidity of 80%. After taking out,
The glass surface was rinsed with pure water, and the alkali component of the burn generated on the glass surface was dissolved and collected in water. The alkali metals (Li, K) contained in this aqueous solution were quantitatively analyzed and are shown in Table 1 as the weight of the alkali element oxide. Li was not detected in any of the samples. Moreover, the obtained glass had improved strength.
【０００９】 表１ ーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーー ヤケ中のＫ2Ｏ量（ガラス１ｃｍ2当たり） ーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーー サンプル１ ０．１２μｇ 比較サンプル１ ０．５５μｇ ーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーー 本発明において、上記の水溶液の温度は４０℃以上とす
るのが化学耐久性が大きくする（表１で小さい数値とな
る）上で好ましい。水溶液の温度と時間は、８０℃のと
き４時間、５０℃のとき２４時間が好ましい。上記の実
施例ではリチウムの硝酸塩水溶液を用いたが、硫酸塩、
炭酸塩等の塩を用いることができる。[0009] Table 1-The amount of K 2 O in the burn (1 cm 2 of glass) Per)) Sample 1 0.12 μg Comparative sample 1 0.55 μg --- ------------------------------------------------------------------------------------------------------------------- In the present invention, the temperature of the above aqueous solution should be 40 ° C. or higher for chemical durability. This is preferable in terms of increasing the performance (reducing the numerical value in Table 1). The temperature and time of the aqueous solution are preferably 4 hours at 80 ° C. and 24 hours at 50 ° C. In the above embodiment, an aqueous solution of lithium nitrate was used.
Salts such as carbonates can be used.
【００１０】[0010]
【発明の効果】本発明によると、高温高湿の雰囲気に維
持されてもガラス表面にヤケの発生が抑制された化学強
化ガラスが得られる。また、この化学強化ガラス上に金
属膜などを被覆して光記録媒体や磁気記録媒体を製造す
ると、化学的耐久性の優れた記録媒体とすることができ
る。According to the present invention, it is possible to obtain a chemically strengthened glass in which the occurrence of burns on the glass surface is suppressed even when the atmosphere is maintained in a high temperature and high humidity atmosphere. Further, when an optical recording medium or a magnetic recording medium is manufactured by coating a metal film or the like on the chemically strengthened glass, a recording medium having excellent chemical durability can be obtained.
【図１】本発明で得られる化学強化ガラス板の一部断面
図である。FIG. 1 is a partial cross-sectional view of a chemically strengthened glass sheet obtained by the present invention.
１・・・化学強化ガラス板 1 ... Chemically strengthened glass plate
Claims (3)
有するガラスを、カリウムイオンを含有する溶融塩に接
触させてナトリウムイオンとカリウムイオンとのイオン
交換により前記ガラス板表面に圧縮層を形成し、その後
前記ガラス板表面をリチウム塩水溶液に接触させる化学
強化ガラスの製造方法。A glass containing sodium ions as an alkali component is brought into contact with a molten salt containing potassium ions to form a compression layer on the surface of the glass plate by ion exchange between sodium ions and potassium ions. A method for producing chemically strengthened glass in which the surface of a glass plate is brought into contact with a lithium salt aqueous solution.
項１に記載の化学強化ガラスの製造方法。2. The method according to claim 1, wherein the lithium salt is lithium nitrate.
モル／リットル以上とした請求項２に記載の化学強化ガ
ラスの製造方法。3. The method for producing a chemically strengthened glass according to claim 2 in which lithium nitrate concentration of the aqueous solution is 10 -4 mol / l or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6018055A JP2871440B2 (en) | 1994-02-15 | 1994-02-15 | Manufacturing method of chemically strengthened glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6018055A JP2871440B2 (en) | 1994-02-15 | 1994-02-15 | Manufacturing method of chemically strengthened glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07223845A JPH07223845A (en) | 1995-08-22 |
| JP2871440B2 true JP2871440B2 (en) | 1999-03-17 |
Family
ID=11961020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6018055A Expired - Lifetime JP2871440B2 (en) | 1994-02-15 | 1994-02-15 | Manufacturing method of chemically strengthened glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2871440B2 (en) |
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| CN115432945B (en) * | 2022-09-30 | 2023-08-18 | 成都光明光电股份有限公司 | Chemical strengthening method for improving weather resistance of nano microcrystalline glass |
| CN116002993A (en) * | 2023-01-17 | 2023-04-25 | 京东方杰恩特喜科技有限公司 | Tempered glass and method for producing the same |
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-
1994
- 1994-02-15 JP JP6018055A patent/JP2871440B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07223845A (en) | 1995-08-22 |
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