JP2619346B2 - Fluorescent glass - Google Patents
Fluorescent glassInfo
- Publication number
- JP2619346B2 JP2619346B2 JP1082484A JP8248489A JP2619346B2 JP 2619346 B2 JP2619346 B2 JP 2619346B2 JP 1082484 A JP1082484 A JP 1082484A JP 8248489 A JP8248489 A JP 8248489A JP 2619346 B2 JP2619346 B2 JP 2619346B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- lamp
- present
- fluorescent lamp
- ring
- 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
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
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は螢光灯用ガラスに係り、特に熱加工性に優
れ、螢光ランプとして明るく、かつ明るさを長持ちさせ
る螢光灯用ガラス組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a fluorescent lamp glass, and particularly to a fluorescent lamp which is excellent in heat workability, is bright as a fluorescent lamp, and has a long life. The present invention relates to a glass composition for a lamp.
（従来の技術） 従来、直管螢光灯にはソーダライムガラスが用いら
れ、環形螢光灯にはPb0含有ガラス（以下鉛ガラスとい
う）が使われていた。(Prior Art) Conventionally, soda-lime glass has been used for a straight fluorescent lamp, and Pb0-containing glass (hereinafter referred to as lead glass) has been used for a ring fluorescent lamp.
一般に環形螢光ランプの製造は、直管ガラスからなる
気密容器の内壁に螢光体を被着させ、その両端に電極を
保持するステムを封止し、これを電気炉等で700〜800℃
に加熱軟化させて成形ドラムに捲回して環形に成形する
ものである。In general, to manufacture a ring-shaped fluorescent lamp, a fluorescent substance is attached to the inner wall of an airtight container made of a straight tube glass, and a stem holding electrodes at both ends thereof is sealed at 700 to 800 ° C. in an electric furnace or the like.
Is heated and softened, wound around a forming drum, and formed into an annular shape.
また、最近はランプの効率化・平面化およびコンパク
ト化に伴いガラス管の断面形状を偏平にしたり、直管ガ
ラスをＵ字形やダブルＵ字形に屈曲した螢光ランプが開
発されている。Recently, fluorescent lamps have been developed in which the cross-sectional shape of a glass tube is flattened or the straight tube glass is bent into a U-shape or a double U-shape with increasing efficiency, flattening, and compactness of the lamp.
しかし、鉛ガラスは環形用として熱加工性に優れてい
るが、高価な原料費、有害性の問題があり熱加工性のよ
い無鉛ガラスが望まれていた。近年はこのニーズに応え
るため、環形螢光ランプ用ガラスに安価で比重の小さい
ソーダライムガラスへの転換が行なわれ、既に市販され
ているが未だ問題点が残されている。However, although lead glass is excellent in heat workability for a ring shape, there is a problem of expensive raw material cost and harmfulness, and lead-free glass having good heat workability has been desired. In recent years, in order to meet this need, glass for ring-shaped fluorescent lamps has been converted to soda-lime glass which is inexpensive and has a low specific gravity, and is already commercially available but still has problems.
（発明が解決しようとする問題点） 一般に、ソーダライムガラスは前記鉛ガラスに比べて
熱加工温度が100℃高くなるため、加工時の歩留は勿
論、螢光体や結着剤とガラス管との間に物理的および化
学的反応を生じ、螢光体が変質し、環形螢光ランプの初
期光束の低下および光束維持率を劣化させる問題が生じ
た。またランプ点灯により、光源から放射される紫外線
被曝によってガラスがソラリゼーションを起し光透過率
の低下をきたす等の問題も生じた。従って環形螢光ラン
プ用ガラスとしては、曲げ加工が容易にできるような粘
性特性を有することと、紫外線によるソラリゼーション
を起しにくいことが必須条件となる。それには軟化温度
は出来るだけ低く、かつ光束維持率で代表される耐ソラ
リゼーション性の改善が必要である。(Problems to be Solved by the Invention) Generally, soda lime glass has a hot working temperature of 100 ° C. higher than that of the above-mentioned lead glass. A physical and chemical reaction takes place between the fluorescent lamp and the fluorescent lamp, and the fluorescent substance is deteriorated. In addition, when the lamp is turned on, there is a problem that the glass is solarized due to exposure to ultraviolet rays emitted from the light source, resulting in a decrease in light transmittance. Therefore, it is essential that the glass for a ring-shaped fluorescent lamp has a viscous property so that bending can be easily performed and that solarization by ultraviolet rays hardly occurs. For this purpose, it is necessary to improve the solarization resistance represented by the luminous flux maintenance factor while keeping the softening temperature as low as possible.
また膨張係数は鉛ガラスを用いるシテムガラスとの封
着性の関係から93〜130×10-7/℃の範囲に規制される。The expansion coefficient is regulated in the range of 93 to 130 × 10 −7 / ° C. due to the sealing property with the system glass using lead glass.
以上の特性をすべて満足するガラス組成物は未だ開発
されていない。A glass composition satisfying all the above properties has not yet been developed.
本発明は、上記事情を考慮してなされたものでその目
的とするところは、螢光ランプ用ガラスとしてランプ特
性の初期光束と光束維持率の向上を目標とした熱加工性
がよく、かつ耐ソラリゼーション性の改善されたソーダ
ライムガラスを提供することである。The present invention has been made in view of the above circumstances, and has as its object to provide a glass for a fluorescent lamp that has good thermal workability with the aim of improving the initial luminous flux and the luminous flux maintenance factor of the lamp characteristics, and is resistant to heat. An object of the present invention is to provide a soda-lime glass having improved solarization properties.
（問題点を解決するための手段と作用） 本発明は上記目的を達成するために、従来のソーダラ
イム系ガラスに必須成分としてBaO,B2O3,Ce2Oの特定量
を導入することにより、従来のソーダライムガラスに比
べて著しく熱加工性が優れ、ランプ特性を向上させたガ
ラス組成物を開発したものである。(Means and Actions for Solving the Problems) In order to achieve the above object, the present invention introduces a specific amount of BaO, B 2 O 3 , Ce 2 O as an essential component into a conventional soda-lime glass. As a result, a glass composition having significantly improved heat workability as compared with conventional soda lime glass and improved lamp characteristics has been developed.
即ち、ランプ特性としての初期光束と光束維持率は、
ランプの働程特性として最も重要な特性である。本発明
者は特にガラス材質と結着剤および螢光体との熱加工に
おける高温時の化学的反応とランプの高効率化およびコ
ンパウト化に伴う高出力ランプの管壁負荷の増加による
ガラスのソラリゼーションが上記ランプ特性に最も大き
な影響を及ぼしていることを見い出した。That is, the initial luminous flux and the luminous flux maintenance rate as lamp characteristics are:
This is the most important characteristic of the working range of the lamp. The inventor of the present invention has developed a method of performing a chemical reaction at a high temperature in a thermal processing of a glass material with a binder and a phosphor, and increasing the efficiency of the lamp and increasing the load on the tube wall of the high-power lamp due to the compounding. Has the greatest influence on the lamp characteristics.
これらの影響を低減するためには曲げ加工温度を出来
るだけ低くして、螢光体および結着剤の変質を防止する
と共に、耐ソラリゼーション性を改善することが必要で
ある。In order to reduce these effects, it is necessary to lower the bending temperature as much as possible to prevent deterioration of the phosphor and the binder and to improve the solarization resistance.
本発明は、ガラスの化学的耐久性の劣化や膨張係数を
増大させるアルカリ金属酸化物を増加することなく軟化
温度を低下し、耐ソラリゼーション性を改善したもので
ある。The present invention is to improve the solarization resistance by lowering the softening temperature without increasing the chemical durability of the glass or increasing the alkali metal oxide which increases the expansion coefficient.
即ち、本発明は重量百分率でSiO265〜75％,Al2O30.5
〜４％,Na2O＋K2O＋Li2O13〜20％,CaO＋MgO1〜13％,BaO
0.1〜10％,B2O30.1〜５％,CeO20.1〜１％,Sb2O3＋As2O3
0〜１％の組成を有する螢光灯用ガラスである。That is, the present invention relates to SiO 2 65 to 75% by weight percentage, Al 2 O 3 0.5
~4%, Na 2 O + K 2 O + Li 2 O13~20%, CaO + MgO1~13%, BaO
0.1~10%, B 2 O 3 0.1~5 %, CeO 2 0.1~1%, Sb 2 O 3 + As 2 O 3
A fluorescent lamp glass having a composition of 0 to 1%.
次に上記ガラス組成範囲の数値限定理由について詳述
する。Next, the reasons for limiting the numerical values of the glass composition range will be described in detail.
SiO2はガラス形成の必須成分であるが、65％未満では
膨張係数が大きくなり化学的耐久性が劣化する。また75
％を越えると膨張係数が小さくなり過ぎ、軟化温度も高
くなり環形成形が困難となる。SiO 2 is an essential component for glass formation, but if it is less than 65%, the expansion coefficient increases and the chemical durability deteriorates. Also 75
%, The coefficient of expansion becomes too small, the softening temperature becomes high, and it becomes difficult to form a ring.
Al2O3は0.5％未満では化学的耐久性が劣化し、４％を
越えると粘性が高くなって溶融不均質となり脈理不良が
増加する。If the content of Al 2 O 3 is less than 0.5%, the chemical durability deteriorates, and if it exceeds 4%, the viscosity becomes high, the melt becomes inhomogeneous, and poor striae increase.
Na2O,K2O,Li2Oのアルカリ金属酸化物合量が13％未満
では軟化温度が高くなり環形成形が難かしくなるうえに
膨張係数も小さくなり過ぎる。また20％を越えると膨張
係数が大きくなり過ぎ、化学的耐久性が劣化する。If the total content of alkali metal oxides of Na 2 O, K 2 O, and Li 2 O is less than 13%, the softening temperature becomes high, the ring-forming form becomes difficult, and the expansion coefficient becomes too small. If it exceeds 20%, the coefficient of expansion becomes too large, and the chemical durability deteriorates.
CaOおよびMgOのアルカリ土類金属酸化物は電気絶縁性
および化学的耐久性を向上させるが、その合量が１％未
満ではその効果が期待できず、溶融性が悪化し、13％を
越えるとガラスを失透させる傾向が強くなる。また高温
粘性は低下させるが軟化温度は上昇する。Alkaline earth metal oxides of CaO and MgO improve the electrical insulation and chemical durability. However, if the total amount is less than 1%, the effect cannot be expected, and the meltability deteriorates. The tendency to devitrify the glass increases. Also, the high temperature viscosity decreases, but the softening temperature increases.
BaOは軟化温度を低下し、化学的耐久性と耐ソラリゼ
ーション性を改善する効果があるが0.1％未満ではその
効果が期待できず、10％を越えると溶融過程での泡切れ
が悪くなる。BaO has the effect of lowering the softening temperature and improving the chemical durability and solarization resistance, but if it is less than 0.1%, the effect cannot be expected, and if it exceeds 10%, the foam becomes poor in the melting process.
B2O3は溶融性・化学的耐久性を向上させるが0.1％未
満ではその効果が得られず、５％を越えると軟化温度を
上昇するうえ膨張係数が小さくなり過ぎてステムガラス
との封着が困難になる。B 2 O 3 improves the meltability and chemical durability, but if less than 0.1%, the effect cannot be obtained. If it exceeds 5%, the softening temperature rises and the expansion coefficient becomes too small to seal the stem glass. It becomes difficult to wear.
CeO2は耐ソラリゼーション性の改善に顕著な効果を示
すので、本発明の必須成分として添加されるが、0.1％
未満ではその効果が得られず、また１％を越えてもその
効果は１％添加したときとほぼ同じである。Since CeO 2 has a remarkable effect on improving solarization resistance, it is added as an essential component of the present invention.
If it is less than 1%, the effect cannot be obtained, and if it exceeds 1%, the effect is almost the same as when 1% is added.
Sb2O3およびAs2O3は共に清澄剤として使用されるが、
１％を越えると熱加工時に再発泡したり、黒化する恐れ
がある。またAs2O3はCeO2との共存で着色する恐れがあ
るので、0.1％以下が望ましい。Sb 2 O 3 and As 2 O 3 are both used as fining agents,
If it exceeds 1%, re-foaming or blackening may occur during thermal processing. Further, As 2 O 3 may be colored by coexistence with CeO 2 , so that it is preferably 0.1% or less.
（実施例） 以下に本発明の実施例を説明する。(Example) An example of the present invention will be described below.
第１表は本発明に係る螢光ランプ用ガラスの実施例と
従来品の比較例を示す。実施例１〜６は本発明に係る実
施例であり、比較例は従来のソーダライムガラスであ
る。膨張係数は０〜300℃間の平均線膨張係数であり、
軟化温度は粘性107.65ポイズに相当する温度であり、そ
れぞれJIS R3102「ガラスの線膨張係数の測定方法」お
よびJIS R3104「ガラスの軟化温度測定方法」に準拠し
て測定した値を示した。Table 1 shows examples of the glass for fluorescent lamps according to the present invention and comparative examples of conventional glass. Examples 1 to 6 are examples according to the present invention, and comparative examples are conventional soda-lime glass. The coefficient of expansion is the average coefficient of linear expansion between 0 and 300 ° C,
Softening temperature is a temperature corresponding to a viscosity 10 7.65 poise, showed and JIS R3104 value measured according to the "softening temperature measuring method of the glass,""method of measuring the linear expansion coefficient of glass" JIS R3102, respectively.
下記実施例のガラス管を使用して30Wの環形螢光ラン
プを試作し、ランプの初期光束と光束維持率を評価した
結果を第２表に示す。Table 2 shows the results of evaluating a 30 W ring-shaped fluorescent lamp using the glass tube of the following example and evaluating the initial luminous flux and the luminous flux maintenance factor of the lamp.
下記第２表に示すとおり、従来のソーダライムガラス
（比較例）に比べて40〜100℃低い温度で環形成形が可
能となり、螢光体の劣化防止ができたので、初期光束が
50〜100ルーメン向上した。またガラスの耐ソラリゼー
ション性の改 善によって光束維持率が500時間で１〜４％、2,000時間
で１〜4.5％それぞれ向上した。As shown in Table 2 below, the ring-forming form was possible at a temperature lower by 40 to 100 ° C. than the conventional soda lime glass (comparative example), and the deterioration of the phosphor was prevented.
50-100 lumens improved. In addition, the solarization resistance of glass has been improved. With good, the luminous flux maintenance rate was improved by 1 to 4% at 500 hours and by 1 to 4.5% at 2,000 hours.
以上説明したように本発明に係る螢光ランプ用ガラス
は熱加工性がよく、ランプ特性もよく化学的耐久性にも
優れ、直管形および環形のいずれの管球ガラスとしても
使用できる。As described above, the glass for fluorescent lamps according to the present invention has good heat workability, good lamp characteristics, and excellent chemical durability, and can be used as both a straight tube shape and a ring shape tube glass.
なお、本発明の実施例は環形螢光ランプに適用した例
として記載したが、Ｕ字形またはダブルＵ字形等の螢光
ランプや一般照明用ガラス、たとえば電球等にも適用で
きる。Although the embodiment of the present invention has been described as an example applied to a ring-shaped fluorescent lamp, the present invention can also be applied to a U-shaped or double U-shaped fluorescent lamp and glass for general illumination, such as a light bulb.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1082484A JP2619346B2 (en) | 1989-03-31 | 1989-03-31 | Fluorescent glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1082484A JP2619346B2 (en) | 1989-03-31 | 1989-03-31 | Fluorescent glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02263729A JPH02263729A (en) | 1990-10-26 |
| JP2619346B2 true JP2619346B2 (en) | 1997-06-11 |
Family
ID=13775788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1082484A Expired - Lifetime JP2619346B2 (en) | 1989-03-31 | 1989-03-31 | Fluorescent glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2619346B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0766473A (en) * | 1993-08-26 | 1995-03-10 | Matsushita Electric Ind Co Ltd | Gas laser oscillator |
| JP2002137935A (en) | 2000-10-26 | 2002-05-14 | Nippon Electric Glass Co Ltd | Glass for fluorescent lamp, glass tube for fluorescent lamp and fluorescent lamp |
| JP4071480B2 (en) * | 2001-08-31 | 2008-04-02 | 松下電器産業株式会社 | Glass composition for lamp, lamp stem and bulb using the same, and lamp using the same |
| JP4592353B2 (en) * | 2003-09-09 | 2010-12-01 | 株式会社オハラ | Low refractive index optical glass |
-
1989
- 1989-03-31 JP JP1082484A patent/JP2619346B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02263729A (en) | 1990-10-26 |
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