JP2799281B2 - Milky glass - Google Patents
Milky glassInfo
- Publication number
- JP2799281B2 JP2799281B2 JP5132730A JP13273093A JP2799281B2 JP 2799281 B2 JP2799281 B2 JP 2799281B2 JP 5132730 A JP5132730 A JP 5132730A JP 13273093 A JP13273093 A JP 13273093A JP 2799281 B2 JP2799281 B2 JP 2799281B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- less
- fluorine
- milky
- total amount
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は，無色透明なガラス中に
母体ガラスと屈折率の異なる微細な結晶又はガラスの粒
子が一様に分散し、光を散乱する乳白ガラスに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opalescent glass in which fine crystals or glass particles having a refractive index different from that of a base glass are uniformly dispersed in a colorless and transparent glass to scatter light.
【０００２】[0002]
【従来の技術】乳白ガラスはガラスに外観状不透明な乳
濁状を与えるため、乳白剤を添加することにより異物質
の微粒子をガラス中に一様に分散させて得られるもので
ある。この乳白剤には各種の弗化物、塩化物、燐酸塩な
どが使用されることはよく知られている。2. Description of the Related Art Opalescent glass is obtained by adding an opacifier to uniformly disperse fine particles of a different substance in glass to give the glass an opaque milky appearance. It is well known that various opium fluorides, chlorides, phosphates and the like are used in this opacifier.
【０００３】従来、乳白ガラスは照明用グローブに用い
られグローブ内の光源から放射された光をグローブガラ
スで散乱させて淡い光としインテリアとしての効果を高
めるものである。乳白ガラスの製造方法は、弗素をガラ
ス中に重量百分率で３〜５％存在させ、ガラスの冷却過
程でＣａＦ2 等のコロイド状の粒子を作り、それにより
光を散乱させるものであった。Hitherto, milky glass has been used for lighting gloves, and light radiated from a light source in the glove is scattered by the glove glass to make light light, thereby enhancing the effect as an interior. Method for producing a milk-white glass, fluorine was present 3-5% by weight percent in the glass, making the colloidal particles such as CaF 2 in the cooling process of the glass, thereby were those to scatter light.
【０００４】[0004]
【発明が解決しようとする課題】しかし、従来のもので
は反応性の高い弗素の添加によりガラス溶融用ルツボの
侵蝕が激しい。さらに弗素は溶融時に揮発しやすい成分
である上、毒性のあるガスが拡散されるという問題があ
る。本発明は上記事情を考慮してなされたもので従来と
同等の乳白度を持ち、かつ、ガラスによるガラス溶融用
ルツボの侵蝕を最小限とし、毒性のあるガスの拡散が少
ない乳白ガラスを提供することを目的とする。However, in the prior art, the addition of highly reactive fluorine causes severe erosion of the glass melting crucible. Further, fluorine is a component that is easily volatilized when it is melted, and also has a problem that a toxic gas is diffused. The present invention has been made in view of the above circumstances, and has the same degree of milkiness as the conventional one, and further minimizes the erosion of the glass melting crucible by the glass, and provides a milky glass with less diffusion of toxic gas. The purpose is to:
【０００５】[0005]
【課題を解決するための手段及び作用】本発明は上記目
的を達成するために、重量百分率で、ＳｉＯ２５５〜８
０％、Ａｌ２Ｏ３０．５〜８％、Ｌｉ２ＯとＮａ２Ｏと
Ｋ２Ｏとの合量が２〜１４％、ＭｇＯとＣａＯとＢａＯ
とＺｎＯとの合量が１〜１５％、Ｂ２Ｏ３８〜２０％、
Ｆ０．５〜１％、Ａｓ２Ｏ３２〜５．５％の組成からな
る乳白ガラスである。According to the present invention, in order to achieve the above object, SiO 255 to 8
0%, Al2O3 0.5 to 8%, the total amount of Li2O, Na2O and K2O is 2 to 14%, MgO, CaO and BaO
And the total amount of ZnO is 1 to 15%, B2O is 38 to 20%,
It is an opalescent glass having a composition of 0.5 to 1% of F and 32 to 5.5% of As2O.
【０００６】次に上記組成範囲の数値限定理由について
詳述する。ＳｉＯ2 はガラスの主成分でありガラスネッ
トワーク構造の形成のためには必要不可欠な成分であ
る。しかし、５５％未満ではこのガラスネットワーク構
造が不十分になり耐水性等が劣化する。８０％を越える
と溶融性が悪くなる。Next, the reasons for limiting the numerical values of the above composition ranges will be described in detail. SiO 2 is a main component of glass and is an essential component for forming a glass network structure. However, if it is less than 55%, the glass network structure becomes insufficient and the water resistance and the like deteriorate. If it exceeds 80%, the meltability deteriorates.
【０００７】Ａｌ2 Ｏ3 はガラスの化学的特性を向上さ
せるが、０．５％未満ではその効果が得られない。８％
を越えると脈理等のガラス不良の原因となる。Although Al 2 O 3 improves the chemical properties of glass, its effect cannot be obtained at less than 0.5%. 8%
Exceeding the above causes glass defects such as striae.
【０００８】Ｌｉ2 ＯとＮａ2 ＯとＫ2 Ｏとのアルカリ
金属酸化物は、ガラスの粘性を下げ溶融を促進するが、
合量が２％未満ではその効果が得られない。また合量が
１４％を越えると耐水性等の化学的特性が劣化する。An alkali metal oxide of Li 2 O, Na 2 O and K 2 O lowers the viscosity of glass and promotes melting,
If the combined amount is less than 2%, the effect cannot be obtained. If the total amount exceeds 14%, chemical properties such as water resistance deteriorate.
【０００９】ＭｇＯとＣａＯとＢａＯとＺｎＯとの２価
のイオンは、溶融性を向上し、熱膨張率を調整し、化学
的耐久性を向上させるが、合量が１％未満ではその効果
が得られない。また合量が１５％を越えると結晶が発生
し易くなる。The divalent ions of MgO, CaO, BaO, and ZnO improve the meltability, adjust the coefficient of thermal expansion, and improve the chemical durability, but the effect is less when the total amount is less than 1%. I can't get it. When the total amount exceeds 15%, crystals are easily generated.
【００１０】Ｂ2 Ｏ3 は、熱膨張率を上げずに溶融性を
向上させるが、８％未満ではその効果が得られない。２
０％を越えると耐水性等の化学的特性が劣化する。[0010] B 2 O 3 improves the meltability without increasing the coefficient of thermal expansion, but the effect cannot be obtained if it is less than 8%. 2
If it exceeds 0%, chemical properties such as water resistance deteriorate.
【００１１】ＦとＡｓ２Ｏ３とはガラスの乳白剤として
添加する。Ｆの含有量が０．５％未満では十分乳白せ
ず、１％を越えるとガラス溶融用ルツボの侵蝕が激しく
なってしまう。Ａｓ２Ｏ３の含有量が２％未満では十分
乳白せず、５．５％を越えると乳白度が高くなりすぎ光
の透過性が悪くなる。F and As2O3 are added as glass opacifiers. When the content of F is less than 0.5%, the milky white is not sufficiently obtained, and when it exceeds 1%, the erosion of the glass melting crucible becomes severe. If the content of As2O3 is less than 2%, milky whiteness will not be obtained. If it exceeds 5.5%, milkyness will be too high and light transmittance will be poor.
【００１２】本発明では乳白剤として弗素以外にＡｓ2
Ｏ3 を添加しているので弗素の含有量を減らしてもＡｓ
2 Ｏ3 による発色で乳白度を維持できる。[0012] In the present invention, other than fluorine, As 2
Since O 3 is added, even if the fluorine content is reduced, As
Opacity can be maintained by coloring with 2 O 3 .
【００１３】[0013]
【実施例】本発明の実施例を表１に示す。表１のガラス
組成は重量％で示し、耐火物侵蝕はガラス溶融ルツボと
同一材料で作られた直径１０ｍｍ、長さ２００ｍｍの円
柱サンプルを回転させながら１４００℃で溶融している
ガラス中に三日間浸積する。そして、円柱サンプルの侵
蝕量を測定する。本発明の実施例は比較例と同等の乳白
度を保ち、耐火物侵蝕性も４５％以上改善されている。EXAMPLES Examples of the present invention are shown in Table 1. The glass composition in Table 1 is shown in% by weight, and the refractory erosion was performed for 3 days in glass melted at 1400 ° C. while rotating a cylindrical sample of 10 mm in diameter and 200 mm in length made of the same material as the glass melting crucible. Immerse. Then, the erosion amount of the cylindrical sample is measured. The examples of the present invention maintain the same degree of milkiness as the comparative examples, and the refractory erosion resistance is improved by 45% or more.
【００１４】次に、具体的な実施例を示す。表１のガラ
スＮｏ．１〜４の各ガラス組成が得られるようにガラス
原料を調合し、１ｌの白金ルツボ中で１４００℃で４ｈ
溶融した。この溶融ガラスを金属型中に流し込み、徐冷
したものを板状にスライスし厚さ３ｍｍに研磨したもの
を試料とした。この試料の乳白度を目視で比較した結果
を表１に示す。Next, a specific embodiment will be described. Glass No. 1 in Table 1 was used. Glass raw materials were prepared so as to obtain each glass composition of Nos. 1 to 4, and 4 hours at 1400 ° C. in a 1 liter platinum crucible.
Melted. The molten glass was poured into a metal mold, gradually cooled, sliced into a plate shape, and polished to a thickness of 3 mm to obtain a sample. Table 1 shows the results of a visual comparison of the opacity of this sample.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【発明の効果】以上説明したように、本発明は乳白剤と
して弗素以外にＡｓ2 Ｏ3 を添加しているので弗素の含
有量を減らしてもＡｓ2 Ｏ3 による発色で乳白度を維持
できる。弗素の含有量を減らしたので、耐火物の侵蝕を
減少することができる。さらに、溶融時の弗素ガス揮発
量を低減できる。As described above, the present invention uses As 2 O 3 as an opacifying agent in addition to fluorine, so that even if the fluorine content is reduced, the whiteness can be maintained by coloring with As 2 O 3. . Since the fluorine content is reduced, the erosion of the refractory can be reduced. Further, the amount of fluorine gas volatilized during melting can be reduced.
Claims (1)
％、Ａｌ2 Ｏ3 ０．５〜８％、Ｌｉ2 ＯとＮａ2 Ｏと
Ｋ2 Ｏとの合量が２〜１４％、ＭｇＯとＣａＯとＢａＯ
とＺｎＯとの合量が１〜１５％、Ｂ2 Ｏ3 ８〜２０
％、Ｆ ０．５〜１％、Ａｓ 2 Ｏ 3 ２〜５．５％の組
成からなる乳白ガラス。1. The composition according to claim 1, wherein the weight percentage of SiO 2 is 55-80.
%, Al 2 O3 0.5~8%, the total amount 2 to 14% of the Li 2 O, Na 2 O and K 2 O, MgO, CaO and BaO
And the total amount of ZnO is 1 to 15%, and B 2 O 3 is 8 to 20.
%, F 0.5-1%, As 2 O 3 2-5.5%
A milky glass made of a product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5132730A JP2799281B2 (en) | 1993-05-10 | 1993-05-10 | Milky glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5132730A JP2799281B2 (en) | 1993-05-10 | 1993-05-10 | Milky glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06321573A JPH06321573A (en) | 1994-11-22 |
| JP2799281B2 true JP2799281B2 (en) | 1998-09-17 |
Family
ID=15088256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5132730A Expired - Fee Related JP2799281B2 (en) | 1993-05-10 | 1993-05-10 | Milky glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2799281B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3737294A (en) * | 1970-08-28 | 1973-06-05 | Corning Glass Works | Method for making multi-layer laminated bodies |
| DE2313074C2 (en) * | 1973-03-16 | 1974-10-31 | Jenaer Glaswerk Schott & Gen., 6500 Mainz | Phosphate-clouded opal glasses with thermal expansion coefficients of 48 to 92 times 10 to the power of -7 degrees C and good chemical resistance |
| FR2586672B1 (en) * | 1985-08-30 | 1992-02-14 | Corning Glass Works | COMPOSITION FOR OBTAINING AN OPAL GLASS WITH A WHITE-CREAM TINT |
-
1993
- 1993-05-10 JP JP5132730A patent/JP2799281B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06321573A (en) | 1994-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |