JPS5814376B2 - optical glass - Google Patents
optical glassInfo
- Publication number
- JPS5814376B2 JPS5814376B2 JP53067906A JP6790678A JPS5814376B2 JP S5814376 B2 JPS5814376 B2 JP S5814376B2 JP 53067906 A JP53067906 A JP 53067906A JP 6790678 A JP6790678 A JP 6790678A JP S5814376 B2 JPS5814376 B2 JP S5814376B2
- Authority
- JP
- Japan
- Prior art keywords
- chemical durability
- devitrification
- optical glass
- glass
- tendency
- 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
Links
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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
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)
- Glass Compositions (AREA)
Description
【発明の詳細な説明】
本発明は、屈折率が１．６３〜１．６９、アツベ数が４
３．０〜５２．０なる光学恒数を有する光学ガラスに関
する。Detailed Description of the Invention The present invention has a refractive index of 1.63 to 1.69 and an Abbe number of 4.
It relates to an optical glass having an optical constant of 3.0 to 52.0.
この範囲の光学恒数を有するガラスは、古くから数多く
知られているが、それらの多くは、比較的多量のＰｂＯ
を含むものか、又はＰｂＯとＴ１０２とを共に含むもの
である。Many glasses with optical constants in this range have been known for a long time, but many of them contain relatively large amounts of PbO
or both PbO and T102.
それらの内、前者は化学的耐久性が悪いという欠点を持
っており、後者は着色が強いという欠点を有しているだ
けでなく、Ｔ１０２の増加に伴って分相傾向が強くなり
、それを避けるために比較的多量のＢ２０３及びＡｌ２
０３を使用しなければならないので、ＳｉＯ２量の減少
を招き、結果として充分な化学的耐久性を持ったものと
はならない。Among them, the former has the disadvantage of poor chemical durability, and the latter not only has the disadvantage of strong coloring, but also has a strong tendency to phase separation as T102 increases. Relatively large amounts of B203 and Al2 to avoid
Since 03 must be used, the amount of SiO2 decreases, and as a result, it does not have sufficient chemical durability.
本発明者らは種々研究の結果、ＰｂＯの使用を避け、Ｔ
ｉＯ２のみを使用すれば、着色を改良することができ、
又少量のＬｉ２０を添加し分相傾向を防止してＳｔ０２
を増加させれば、高度の化学的耐久性を持ったガラスが
得られることを知った。As a result of various studies, the present inventors avoided the use of PbO and found that T
If only iO2 is used, the coloring can be improved,
In addition, a small amount of Li20 is added to prevent the tendency of phase separation, resulting in St02
We learned that by increasing the amount of glass, glass with a high degree of chemical durability could be obtained.
又、アルカリ土類酸化物の中で、特にＢａＯとＺｎＯと
が失透を防止する効果が犬であるばかりでなく、ＢａＯ
の増加が化学的耐久性の劣化をもたらさないという意外
な事実も知った。Moreover, among alkaline earth oxides, not only BaO and ZnO are particularly effective in preventing devitrification, but also BaO
I also learned the surprising fact that an increase in the amount of carbon does not cause a deterioration in chemical durability.
さらに、少量のＡｌ２０３を加えることにより、失透防
止効果がより大きくなるだけでなく、溶解性が向上する
ことも知った。Furthermore, it has been found that by adding a small amount of Al203, not only the effect of preventing devitrification becomes greater, but also the solubility is improved.
本発明は上記の知見に基づき、本質的にＳｉＯ２−Ｌｉ
２ｏ−Ａｌ２０３−アルカリ士類酸化物一ＴｉＯ２−Ｚ
ｒＯ２系より成り、比較的着色が少なく、かつ秀れた化
学的耐久性を持つばかりでなく、高い硬度を持つから研
摩加工が容易で、かつ大量生産に適した溶解性と耐失透
性を持つ光学ガラスを提供するものである。The present invention is based on the above findings, and essentially consists of SiO2-Li
2o-Al203-alkali oxide-TiO2-Z
Made of rO2-based material, it has relatively little coloration and excellent chemical durability. It also has high hardness, making it easy to polish, and has solubility and devitrification resistance suitable for mass production. It provides optical glass with
即ち、本発明のガラスは、重量％でＡＳｉ０２３０．０
〜４５．０，Ｂ２０３０〜７．０，Ｌｔ２００．５〜５
．０，ＡＡ２０３１．０〜４．０，Ｂａ０２０．Ｏ〜４
５．０，Ｚｎ０２．０〜１５．０，ＭｆＯ＋ＣａＯ＋Ｓ
ｒＯ３．０〜２５．０、但しＭｒ００〜１０．０，Ｃａ
００〜１０．０，Ｓｒ００〜２０．０，Ｚｒ０２２．Ｏ
〜７．ＯｖＴｉ０２１．０〜６．０なる組成を有する。That is, the glass of the present invention has ASi0230.0 in weight percent.
~45.0, B2030~7.0, Lt200.5~5
．． 0, AA2031.0-4.0, Ba020. O~4
5.0, Zn02.0~15.0, MfO+CaO+S
rO3.0-25.0, but Mr00-10.0, Ca
00~10.0, Sr00~20.0, Zr022. O
~7. It has a composition of OvTi021.0 to 6.0.
次に各成分の限定理由を述べると、Ｓ１０２は４５％以
上では所望の屈折率が得られず、３０％以下では化学的
耐久性が劣化する。Next, the reason for limiting each component will be described. If S102 is 45% or more, the desired refractive index cannot be obtained, and if it is 30% or less, chemical durability deteriorates.
Ｂ２０３は失透防止に有効であるが、７％以上では化学
的耐久性が劣化する。B203 is effective in preventing devitrification, but if it exceeds 7%, chemical durability deteriorates.
Ｌｉ２０は前述した理由で０．５％以上必要だが、５％
以上では化学的耐久性が劣化する。Li20 requires 0.5% or more for the reasons mentioned above, but 5%
Above this level, chemical durability deteriorates.
Ａｌ２０３は１〜４％の範囲で失透防止に有効である。Al203 is effective in preventing devitrification in a range of 1 to 4%.
ＢａＯは２０％以下及び４５％以上では充分な失透防止
効果は得られない。If BaO is less than 20% or more than 45%, sufficient devitrification prevention effect cannot be obtained.
ＺｎＯは２〜１５％の範囲で失透防止効果を持つ。ZnO has an effect of preventing devitrification in the range of 2 to 15%.
ＭｆＯ，ＣａＯ及びＳｒＯの添加は失透防止に有効なの
で合量で３％以上必要であるが、夫々１０％，１０％，
２０％以上及び合量で２５％以上では失透傾向が増大す
る。The addition of MfO, CaO, and SrO is effective for preventing devitrification, so the total amount is required to be 3% or more, but 10%, 10%, and 10%, respectively.
If the amount is 20% or more and the total amount is 25% or more, the tendency to devitrify increases.
Ｚｒ０２は失透防止に役立ち、化学的耐久性を向上させ
、かつガラスの硬度を高めるので、２％以上必要である
が、７％以上では急激に失透傾向を増大させる。ZrO2 helps prevent devitrification, improves chemical durability, and increases the hardness of the glass, so it is necessary to have a content of 2% or more, but if it is 7% or more, the tendency to devitrify increases rapidly.
Ｔ１０２は高屈折率の維持と化学的耐久性の向上とのた
め１％以上必要であるが、６％以上では失透傾向が増大
し、着色も強くなる。T102 is required to be 1% or more in order to maintain a high refractive index and improve chemical durability, but if it is 6% or more, the tendency for devitrification increases and coloration becomes strong.
次に本発明の実施例を下表に示す。Examples of the present invention are shown in the table below.
但し、耐酸性は日本光学硝子工業会規格「光学ガラスの
化学的耐久性の測定法（粉末法）」に基づき、粉末試料
を１００℃の０．０ＩＮ硝酸水溶液に１時間浸漬した場
合の重量減少率を％で表示したものである。However, acid resistance is based on the Japan Optical Glass Industry Association standard "Method for Measuring Chemical Durability of Optical Glass (Powder Method)" and is based on the weight loss when a powder sample is immersed in a 0.0 IN nitric acid aqueous solution at 100°C for 1 hour. The rate is expressed in %.
又、Ａ７２０３の失透防止効果についての実験を次のよ
うに行った。Further, an experiment was conducted on the devitrification prevention effect of A7203 as follows.
表の実施例１番のガラスでＡｌ２０３２％をＳｉＯ２に
置換した組成、即ちＳｉ０２３７．４％，Ｂ２０３３．
０％，Ｌｔ２０２％，Ｂａ０２７．５％，Ｃａ０７．７
％，Ｚｎ０１０．４％，Ｓｒ０５％，Ｚｒ０２４．０％
，Ｔｉ０２３％なる組成のガラスと実施例１番のガラス
を約８０１ずつ白金製るつぼに入れ、１，０００℃で１
６時間保持した。The composition of the glass of Example No. 1 in the table in which 2032% of Al was replaced with SiO2, that is, 7.4% of Si02, and B2033.
0%, Lt202%, Ba027.5%, Ca07.7
%, Zn010.4%, Sr05%, Zr024.0%
, Ti023% and the glass of Example No. 1 were placed in a platinum crucible at a temperature of 1,000°C.
It was held for 6 hours.
その結果、前者は失透しており、後者は失透していなか
った。As a result, the former was devitrified and the latter was not.
従ってＡｌ２０３を加えることによる失透防止効果は明
らかである。Therefore, the effect of preventing devitrification by adding Al203 is obvious.
これらの光学ガラスは、硅石粉、硼酸、炭酸リチウム、
水酸化アルミニウム、炭酸バリウム、炭酸マグネシウム
、炭酸カルシウム、亜鉛華、硝酸ストロンチウム、酸化
ジルコニウム、酸化チタン等の原料の混合物を白金製る
つぼの中で１，３００〜１，４００℃で溶融し、攪拌し
て均質化・脱泡を行った後、適当な温度で予熱した金型
に鋳込み、徐冷することによって得られる。These optical glasses are made of silica powder, boric acid, lithium carbonate,
A mixture of raw materials such as aluminum hydroxide, barium carbonate, magnesium carbonate, calcium carbonate, zinc white, strontium nitrate, zirconium oxide, and titanium oxide is melted at 1,300 to 1,400°C in a platinum crucible and stirred. It is obtained by homogenizing and defoaming, then casting into a mold preheated to an appropriate temperature and slowly cooling.
Claims (1)
〜７．０，Ａ７２０３１．０〜４．０，Ｌｉ２００．５
〜５．０，Ｂａ０２０．０〜４５．０，Ｚｎ０２．Ｏ〜
１５．０，Ｍ／０＋ＣａＯ＋Ｓｒ０３．Ｏ〜２５．０、
但しＭ１００〜１０．０，Ｃａ００〜ＩＯ．０，Ｓｒ０
０〜２０．０，Ｚｒ０２２．０〜７．ＯｔＴｔ０２１．
０〜６．０からなる光学ガラス。At 1% by weight, Si0230.0-45.0,82030
~7.0, A72031.0~4.0, Li200.5
~5.0, Ba020.0~45.0, Zn02. O~
15.0, M/0+CaO+Sr03. O~25.0,
However, M100~10.0, Ca00~IO. 0, Sr0
0~20.0, Zr022.0~7. OtTt021.
Optical glass consisting of 0 to 6.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53067906A JPS5814376B2 (en) | 1978-06-06 | 1978-06-06 | optical glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53067906A JPS5814376B2 (en) | 1978-06-06 | 1978-06-06 | optical glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54159428A JPS54159428A (en) | 1979-12-17 |
| JPS5814376B2 true JPS5814376B2 (en) | 1983-03-18 |
Family
ID=13358400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53067906A Expired JPS5814376B2 (en) | 1978-06-06 | 1978-06-06 | optical glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814376B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6276169U (en) * | 1985-10-29 | 1987-05-15 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19622360C1 (en) * | 1996-06-04 | 1997-06-19 | Schott Glaswerke | Lead-free barium fruit glass |
| DE19631581C1 (en) * | 1996-08-05 | 1997-11-27 | Schott Glaswerke | Barium flint glass used in optical applications |
| DE19703391C1 (en) * | 1997-01-30 | 1998-02-26 | Schott Glaswerke | A lead-free optical crown glass |
| DE102009038812A1 (en) * | 2009-08-31 | 2011-03-10 | Uhde Gmbh | High temperature resistant crystallizing glass solders |
| JP6175742B2 (en) * | 2011-05-18 | 2017-08-09 | 日本電気硝子株式会社 | High refractive index glass |
| JP6016064B2 (en) * | 2011-09-02 | 2016-10-26 | 日本電気硝子株式会社 | High refractive index glass |
-
1978
- 1978-06-06 JP JP53067906A patent/JPS5814376B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6276169U (en) * | 1985-10-29 | 1987-05-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54159428A (en) | 1979-12-17 |
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