JP2000290038A - Glass for fluorescent lamp, glass tube for fluorescent lamp and fluorescent lamp - Google Patents
Glass for fluorescent lamp, glass tube for fluorescent lamp and fluorescent lampInfo
- Publication number
- JP2000290038A JP2000290038A JP11339138A JP33913899A JP2000290038A JP 2000290038 A JP2000290038 A JP 2000290038A JP 11339138 A JP11339138 A JP 11339138A JP 33913899 A JP33913899 A JP 33913899A JP 2000290038 A JP2000290038 A JP 2000290038A
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- Prior art keywords
- glass
- fluorescent lamp
- tube
- weight
- luminance
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、蛍光ランプ用ガラ
スに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp glass.
【０００２】[0002]
【従来の技術】蛍光ランプは、直管や、直管を熱加工し
た環形の形状を有しているものが一般的であるが、最近
では、直管をＵ字やＷ字に曲げたり、数本の直管を平行
に配置して繋ぎ合わせたツイン管や、コンパクト管と呼
ばれる特殊形状のものも開発されている。2. Description of the Related Art Generally, a fluorescent lamp has a straight tube or an annular shape obtained by thermally processing the straight tube, but recently, the straight tube is bent into a U-shape or a W-shape. Twin pipes in which several straight pipes are arranged in parallel and connected together, and a special shape called a compact pipe have also been developed.
【０００３】当初、これら環形や特殊形状の蛍光ランプ
の外囲器に用いられるガラス管は、加工を容易にするた
めに、ＰｂＯを２０〜３０％程度と比較的多量に含有す
る低粘度の鉛ガラスで作製されていたが、現在ではＰｂ
Ｏの毒性問題を回避するためにソーダライムガラスに切
り替えられている。この用途に使われているソーダライ
ムガラスは、ＰｂＯ含有ガラスに近い加工性を持たせる
ために、粘度を下げる成分としてＢａＯを導入したり、
また蛍光ランプに要求される高い輝度とその維持のため
にＳｂ2 Ｏ3 を含有する等、蛍光ランプ用途に特別に改
良されたものである。[0003] Initially, glass tubes used in the envelopes of these ring-shaped or specially shaped fluorescent lamps are made of low-viscosity lead containing a relatively large amount of PbO of about 20 to 30% in order to facilitate processing. It was made of glass, but now Pb
It has been switched to soda-lime glass to avoid O toxicity problems. The soda lime glass used for this purpose has BaO introduced as a component to lower the viscosity in order to have processability close to that of PbO-containing glass,
It is a special improvement for fluorescent lamps, such as containing Sb 2 O 3 for maintaining the high luminance required for the fluorescent lamp and maintaining it.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記し
たソーダライム系のガラス管を外囲器に用いて蛍光ラン
プを製造すると、製造時にガラスが黒く変色し、高輝度
のランプが得られないという問題をしばしば引き起すこ
とが問題となっている。However, when a fluorescent lamp is manufactured by using the above-mentioned soda lime glass tube as an envelope, the glass is discolored to black at the time of manufacturing and a high-luminance lamp cannot be obtained. Is often a problem.
【０００５】本発明の目的は、製造時にガラスが黒色に
変色せず、しかも従来のソーダライムガラスと同等以上
の特性を有する蛍光ランプ用ガラスと、このガラスから
なる蛍光ランプ用ガラス管と、このガラス管を用いて作
製される蛍光ランプを提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a fluorescent lamp glass having a glass color that does not change to black at the time of manufacture and having characteristics equal to or higher than that of conventional soda-lime glass, a fluorescent lamp glass tube made of this glass, and a fluorescent lamp glass tube. An object of the present invention is to provide a fluorescent lamp manufactured using a glass tube.
【０００６】[0006]
【課題を解決するための手段】ガラスが黒色に変色する
原因は、ガラス中に含まれるＳｂ2 Ｏ3 が還元され易い
成分であるために、加工工程中のバーナの燃焼状態に影
響されて金属コロイド化されるためである。そこで本発
明者等は種々の検討を行った結果、これを防止するため
には、ガラス成分にＳｂ2 Ｏ3 をなるべく含まないこと
が必要であること、及びＳｂ2 Ｏ3 に代わる成分として
ＴｉＯ2を所定量含有させればよいことを見いだした。The cause of discoloration of the glass to black is that Sb 2 O 3 contained in the glass is a component that is easily reduced, and is affected by the combustion state of the burner during the processing step. It is because it is colloidal. Therefore, the present inventors have conducted various studies. As a result, it is necessary that the glass component contains as little Sb 2 O 3 as possible in order to prevent this, and TiO is used as a component instead of Sb 2 O 3. It has been found that a predetermined amount of 2 should be contained.
【０００７】即ち、本発明の蛍光ランプ用ガラスは、Ｓ
ｂ2 Ｏ3 含有量が０．１重量％以下であり、かつ、Ｔｉ
Ｏ2 含有量が０．０５〜１０重量％であることを特徴と
する。That is, the glass for a fluorescent lamp of the present invention is
b 2 O 3 content is 0.1% by weight or less, and Ti
O 2 content is characterized in that 0.05 to 10 wt%.
【０００８】また本発明の蛍光ランプ用ガラス管は、Ｓ
ｂ2 Ｏ3 含有量が０．１重量％以下であり、かつ、Ｔｉ
Ｏ2 含有量が０．０５〜１０重量％であるガラスからな
ることを特徴とする。Further, the glass tube for a fluorescent lamp of the present invention is
b 2 O 3 content is 0.1% by weight or less, and Ti
It is characterized by being made of glass having an O 2 content of 0.05 to 10% by weight.
【０００９】また本発明の蛍光ランプは、Ｓｂ2 Ｏ3 含
有量が０．１重量％以下であり、かつ、ＴｉＯ2 含有量
が０．０５〜１０重量％であるガラス管を外囲器として
用いることを特徴とする。Further, the fluorescent lamp of the present invention uses a glass tube having an Sb 2 O 3 content of 0.1% by weight or less and a TiO 2 content of 0.05 to 10% by weight as an envelope. It is characterized by using.
【００１０】[0010]
【発明の実施の形態】本発明の蛍光ランプ用ガラスは、
Ｓｂ2 Ｏ3 の代わりにＴｉＯ2 を必須成分として含有す
ることにより、高い輝度を有し、かつ輝度劣化が少ない
蛍光ランプを作製することができる。BEST MODE FOR CARRYING OUT THE INVENTION The glass for fluorescent lamps of the present invention is
By containing TiO 2 as an essential component instead of Sb 2 O 3, a fluorescent lamp having high luminance and less deterioration in luminance can be manufactured.
【００１１】Ｓｂ2Ｏ3の含有量が０．１％を超えると、
加工工程中にＳｂコロイドが生じて黒色に変色し、高輝
度の蛍光ランプを得ることができなくなる。なおＳｂ2
Ｏ3は含有しないことが望ましい。When the content of Sb 2 O 3 exceeds 0.1%,
During the processing step, Sb colloid is generated and changes color to black, making it impossible to obtain a fluorescent lamp with high brightness. Note that Sb 2
It is desirable not to contain O 3 .
【００１２】ＴｉＯ2 の含有量は０．０５〜１０％、好
ましくは０．２〜５％である。ＴｉＯ2 は、高輝度で輝
度劣化の少ない蛍光ランプを得るための必須成分である
とともに、ガラスの粘度を適度に下げて、蛍光ランプ工
程における加工性、生産性を高める効果を有する。The content of TiO 2 is 0.05 to 10%, preferably 0.2 to 5%. TiO 2 is an essential component for obtaining a fluorescent lamp with high luminance and little luminance deterioration, and has an effect of appropriately reducing the viscosity of glass to enhance workability and productivity in the fluorescent lamp process.
【００１３】蛍光ランプの輝度とその劣化の程度は、Ｓ
ｂ2Ｏ3起因のガラスの黒化による透過率の低下の他に、
アルカリ金属などのガラスからの溶出成分によって引き
起こされる蛍光体の汚染や水銀の消耗、紫外線着色（ソ
ラリゼーション）によるガラスの透過率低下、等の要因
に左右される。加えて蛍光体を塗布した後に熱加工する
環状や特殊形状の蛍光ランプの場合、この加工温度が高
いと蛍光体が劣化して輝度の低下の一因となる。The luminance of the fluorescent lamp and the degree of its deterioration are expressed by S
In addition to the decrease in transmittance due to blackening of glass due to b 2 O 3 ,
It depends on factors such as contamination of the phosphor caused by components eluted from the glass such as alkali metals, consumption of mercury, and reduction in the transmittance of the glass due to ultraviolet coloring (solarization). In addition, in the case of a ring-shaped or specially shaped fluorescent lamp which is subjected to thermal processing after applying a phosphor, if the processing temperature is high, the phosphor is deteriorated, which causes a decrease in luminance.
【００１４】ＴｉＯ2 は、これらガラスのアルカリ溶出
量を低減し、紫外線着色を抑え、また加工温度を下げる
作用が大きいため、高輝度で輝度劣化の少ない蛍光ラン
プが得られると考えられる。Since TiO 2 has a large effect of reducing the alkali elution amount of these glasses, suppressing ultraviolet coloring, and lowering the processing temperature, it is considered that a fluorescent lamp with high luminance and little luminance deterioration can be obtained.
【００１５】この効果を得るためにはＴｉＯ2 を０．０
５％以上添加する必要があり、多い程その効果が高くな
る。しかし、逆に多くなりすぎると、ガラス溶融時に失
透が発生して安定生産ができなかったり、ガラスが黄色
着色して蛍光ランプの色調を損なうので１０％が限度に
なる。In order to obtain this effect, TiO 2 is added at 0.0
It is necessary to add 5% or more, and the effect increases as the content increases. On the other hand, if the content is too large, devitrification occurs when the glass is melted, so that stable production cannot be performed, or the glass is colored yellow to impair the color tone of the fluorescent lamp.
【００１６】また本発明の蛍光ランプ用ガラスは、Ｐｂ
Ｏ、Ａｓ2 Ｏ3 等の有毒な成分を含有しないことが望ま
しく、仮に含有する場合でも０．１％以下に制限するこ
とが好ましい。これは、近年の環境汚染問題意識の高ま
りや法的な規制の強化に伴うものである。なおＰｂＯや
Ａｓ2Ｏ3は、Ｓｂ2Ｏ3と同様に、容易に還元されて金属
コロイド化する成分であり、この点からも含有しないこ
とが好ましい。Further, the glass for a fluorescent lamp of the present invention comprises Pb
It is desirable not to contain toxic components such as O and As 2 O 3, and even if it is contained, it is preferable to limit it to 0.1% or less. This is in line with the recent increase in awareness of environmental pollution and the tightening of legal regulations. PbO and As 2 O 3 , like Sb 2 O 3 , are components that are easily reduced to metal colloids, and it is preferable that PbO and As 2 O 3 are not contained from this point as well.
【００１７】本発明の蛍光ランプ用ガラスの好適な組成
範囲は、重量百分率で、ＳｉＯ2６０〜７５％、Ａｌ2
Ｏ3 ０．５〜１０％、Ｂ2 Ｏ3 ０〜５％、ＲＯ ３〜
１７％（ＲはＣａ、Ｍｇ、Ｓｒ、Ｂａ、Ｚｎを表す）、
Ｒ’2Ｏ １０〜２２％（Ｒ’はＬｉ、Ｎａ、Ｋを表
す）、ＺｒＯ2 ０〜５％、ＣｅＯ2 ０〜２％、Ｆｅ 2
Ｏ3 ０．０１〜０．４％、Ｐ2 Ｏ5 ０〜１％、ＴｉＯ
2 ０．０５〜１０％からなる。Preferred Composition of Glass for Fluorescent Lamp of the Present Invention
The range is weight percent, SiO 2Two60-75%, AlTwo
OThree 0.5-10%, BTwo OThree 0-5%, RO 3 ~
17% (R represents Ca, Mg, Sr, Ba, Zn),
R 'TwoO 10 to 22% (R 'represents Li, Na, K
), ZrOTwo 0-5%, CeOTwo 0-2%, Fe Two
OThree 0.01-0.4%, PTwo OFive 0-1%, TiO
Two Consists of 0.05-10%.
【００１８】以下に、ガラス組成の限定理由を述べる。The reasons for limiting the glass composition will be described below.
【００１９】ＳｉＯ2 は、ガラスのマトリックスを作る
必須の成分であるが、７５％を超えると粘度が非常に高
くなり、蛍光ランプ製造時の加工性を大きく損ない、ま
た、ガラス管製造時においても溶融が難しくなり、ぶ
つ、脈理、気泡の多いガラスとなる。逆に６５％未満で
は、熱膨張係数が大きくなり過ぎ、ステムガラスとの膨
張係数の整合性がとれなくなる。さらに、化学的耐久性
が大きく後退し、輝度の低下の原因となる。なおＳｉＯ
2 の好ましい範囲は６２〜７３％である。[0019] SiO 2 is an essential component for forming a glass matrix, but if it exceeds 75%, the viscosity becomes extremely high, which greatly impairs the processability in the manufacture of fluorescent lamps. Melting becomes difficult, and the glass becomes bumpy, striae, and has many bubbles. Conversely, if it is less than 65%, the coefficient of thermal expansion becomes too large, and the matching of the expansion coefficient with the stem glass cannot be obtained. Further, the chemical durability is greatly reduced, which causes a decrease in luminance. Note that SiO
The preferred range of 2 is 62-73%.
【００２０】Ａｌ2 Ｏ3 は、ガラスの耐候性を向上させ
る作用が高く、またガラスの失透を抑えるのに有効であ
るが、０．５％未満ではその効果は小さく、１０％を超
えると、ガラスの粘度が急激に高くなりガラスの溶融
や、蛍光ランプの曲げ加工が困難になる。なおＡｌ2 Ｏ
3 の好ましい範囲は０．５〜５％である。Al 2 O 3 has a high effect of improving the weather resistance of the glass and is effective in suppressing the devitrification of the glass. However, the effect is small when it is less than 0.5%, and it is small when it exceeds 10%. In addition, the viscosity of the glass rapidly increases, and it becomes difficult to melt the glass and to bend the fluorescent lamp. In addition, Al 2 O
A preferred range of 3 is 0.5 to 5%.
【００２１】Ｂ2 Ｏ3 は、ガラスの粘度を小さくし、さ
らに耐候性を向上する成分であり添加することが好まし
い。しかし、５％を超えると逆に耐候性が後退すると共
に溶融時の蒸発が多くなり、均質性の高いガラスが得ら
れなくなる。したがって、５％が限度である。なおＢ2
Ｏ3 の好ましい範囲は０〜２％である。B 2 O 3 is a component that reduces the viscosity of the glass and further improves the weather resistance, and is preferably added. However, if it exceeds 5%, on the contrary, the weather resistance deteriorates and the evaporation at the time of melting increases, so that a glass with high homogeneity cannot be obtained. Therefore, 5% is the limit. Note that B 2
The preferred range of O 3 is 0 to 2%.
【００２２】ＲＯ（ＲはＣａ、Ｍｇ、Ｓｒ、Ｂａ、Ｚｎ
を表す。）は、ガラスの溶解を促進するとともに、ガラ
スの耐候性を上げる作用がある。また粘度を下げる効果
も大きい。しかしＲＯが３％未満では十分な効果を得る
ことができない。一方、１７％を超えるとガラスの失透
性が増大し、均質性の高いガラスが得られなくなる。ま
た温度に対する粘度の変化が急激になるため、熱間での
ガラス管の精密な成形・加工が困難になる。なおＲＯの
好ましい範囲は５〜１５％である。また各成分の含有量
は、ＣａＯ ２〜９％、ＭｇＯ １〜９％、ＳｒＯ ０
〜７％、ＢａＯ０〜４％、ＺｎＯ ０〜５％が適当であ
る。ただしＢａＯについては、環境面からできる限り使
用量を低減することが望まれており、この観点から０．
１％以下に制限することが望ましい。RO (R is Ca, Mg, Sr, Ba, Zn
Represents ) Has the effect of accelerating the melting of the glass and increasing the weather resistance of the glass. The effect of lowering the viscosity is also great. However, if the RO is less than 3%, a sufficient effect cannot be obtained. On the other hand, if it exceeds 17%, the devitrification of the glass increases, and a glass with high homogeneity cannot be obtained. Further, since the viscosity changes rapidly with temperature, it is difficult to precisely form and process the glass tube hot. The preferred range of RO is 5 to 15%. The content of each component is CaO 2 to 9%, MgO 1 to 9%, SrO 0
-7%, BaO 0-4%, ZnO 0-5% are suitable. However, from the viewpoint of the environment, it is desired to reduce the amount of BaO used as much as possible.
It is desirable to limit it to 1% or less.
【００２３】Ｒ’Ｏ（Ｒ’はＬｉ、Ｎａ、Ｋを表す）
は、ガラスの線熱膨張係数をステムガラスと整合のとれ
る９０〜１０５×１０-7／℃に設定するとともに、粘度
を下げるのに必須の成分である。また融剤としての作用
も大きい。その含有量が１０％より少ないとこの作用が
不十分となる。また２２％を超えると線熱膨張係数が大
きくなりすぎるとともに、ガラスから溶出しやすくなる
ため、蛍光体や水銀と反応して蛍光ランプの輝度を下げ
たり、長期の使用に十分な耐候性が得られなくなる。な
おＲ’Ｏの好ましい範囲は１５〜２０％である。また各
成分の含有量は、Ｌｉ2Ｏ ０〜３％、Ｎａ2Ｏ ７〜１
９％、Ｋ2Ｏ ０〜６％であることが好ましい。R'O (R 'represents Li, Na, K)
Is an essential component for setting the coefficient of linear thermal expansion of glass to 90 to 105 × 10 −7 / ° C., which is compatible with stem glass, and for lowering the viscosity. It also has a great effect as a flux. If the content is less than 10%, this effect becomes insufficient. On the other hand, if it exceeds 22%, the coefficient of linear thermal expansion becomes too large and it is easily eluted from the glass. Can not be. The preferred range of R'O is 15 to 20%. The content of each component is Li 2 O 0 to 3%, Na 2 O 7 to 1
9%, it is preferred that K 2 O 0~6%.
【００２４】ＺｒＯ2 はガラスの耐候性を高める効果が
あるので添加することが好ましいが、量が増えるに従っ
てガラスの失透性が増大し、安定したガラスの溶融がで
きなくなる。このためＺｒＯ2 の上限は５％に限定され
る。なおＺｒＯ2 の好ましい範囲は０〜２％である。ZrO 2 is preferably added because it has the effect of enhancing the weather resistance of the glass. However, as the amount increases, the devitrification of the glass increases, making it impossible to stably melt the glass. For this reason, the upper limit of ZrO 2 is limited to 5%. Incidentally preferred range of ZrO 2 is 0-2%.
【００２５】ＣｅＯ2 は紫外線を吸収する作用が大きい
成分である。このためランプ外への紫外線の漏洩防止効
果を高めたい場合、少量添加することが好ましい。また
清澄剤としての作用もあるので、ガラスの泡品位を改善
することができる。しかし、２％を超えるとガラスの着
色が著しくなるという問題がある。なおＣｅＯ2 の好ま
しい範囲は０〜１．５％である。CeO 2 is a component having a large action of absorbing ultraviolet rays. For this reason, when it is desired to enhance the effect of preventing ultraviolet rays from leaking out of the lamp, it is preferable to add a small amount. In addition, since it also has a function as a fining agent, it is possible to improve the bubble quality of glass. However, when it exceeds 2%, there is a problem that coloring of the glass becomes remarkable. The preferred range of CeO 2 is 0 to 1.5%.
【００２６】Ｆｅ2 Ｏ3 は必須成分ではないが、原料の
不純物として約０．０１％以上含まれていることが多
い。Ｆｅ2 Ｏ3 はＣｅＯ2 と同じ作用があるため、０．
４％まで積極的に加えてもよいが、これを超えるとＣｅ
Ｏ2 同様にガラスが著しく着色してしまう。なおＦｅ2
Ｏ3 の好ましい範囲は、０．０１〜０．２％である。Although Fe 2 O 3 is not an essential component, it often contains about 0.01% or more as a raw material impurity. Fe 2 O 3 has the same effect as CeO 2 ,
Up to 4% may be added positively, but if it exceeds this, Ce
Like O 2 , the glass is significantly colored. Note that Fe 2
The preferred range of O 3 is 0.01 to 0.2%.
【００２７】Ｐ2 Ｏ5 はガラスの液相温度を下げ、失透
を抑えるので少量添加できるが、１％を超えるとガラス
が乳白化して好ましくない。なおＰ2 Ｏ5 の好ましい範
囲は、０．１〜０．８％である。P 2 O 5 can be added in a small amount because it lowers the liquidus temperature of the glass and suppresses devitrification. However, if it exceeds 1%, the glass becomes milky, which is not preferable. Note preferable range of P 2 O 5 is 0.1 to 0.8%.
【００２８】次に本発明の蛍光ランプ用ガラスを用いて
蛍光ランプを作製する方法を説明する。Next, a method of manufacturing a fluorescent lamp using the glass for a fluorescent lamp of the present invention will be described.
【００２９】まず所望の組成を有するように、ガラス原
料を調合してバッチを作製する。First, a glass raw material is prepared so as to have a desired composition to prepare a batch.
【００３０】次にガラス溶融炉にバッチを投入し、１５
００〜１６００℃でタンク式連続溶融炉にてガラス化し
た後、ダンナー法、ダウンドロー法、アップドロー法等
によってガラスを管状に成形し、所定の長さに切断して
ガラス管を得る。Next, the batch was put into a glass melting furnace, and
After vitrification in a tank-type continuous melting furnace at 00 to 1600 ° C., the glass is formed into a tube by a Danner method, a down-draw method, an up-draw method or the like, and cut into a predetermined length to obtain a glass tube.
【００３１】続いて、ガラス管の両端に絞り加工を施す
等、所望の形状に加工して蛍光ランプ用外囲器を作製す
る。Subsequently, the glass tube is processed into a desired shape, for example, by drawing at both ends, thereby producing a fluorescent lamp envelope.
【００３２】その後、蛍光体の塗布、ステムの取り付
け、排気、水銀やＡｒガスの封入等を行う。環状蛍光灯
や特殊形状の蛍光灯の場合は、さらに曲げ加工等を行っ
て蛍光ランプを得る。Thereafter, application of a phosphor, attachment of a stem, exhaust, sealing of mercury and Ar gas, and the like are performed. In the case of an annular fluorescent lamp or a fluorescent lamp of a special shape, a fluorescent lamp is obtained by further performing a bending process or the like.
【００３３】[0033]
【実施例】次に、本発明を実施例に基づいて説明する。Next, the present invention will be described based on embodiments.
【００３４】表１〜３は、本発明の実施例（試料Ｎｏ．
１〜１４）及び比較例（試料Ｎｏ．１５、１６）を示し
ている。なお試料Ｎｏ．１５は、ソーダライムガラスか
らなる従来の蛍光ランプ用ガラスを示している。Tables 1 to 3 show examples of the present invention (sample Nos.
1 to 14) and Comparative Examples (Sample Nos. 15 and 16). The sample No. Reference numeral 15 denotes a conventional fluorescent lamp glass made of soda lime glass.
【００３５】[0035]
【表１】 [Table 1]
【００３６】[0036]
【表２】 [Table 2]
【００３７】[0037]
【表３】 [Table 3]
【００３８】各試料は次のようにして作製した。Each sample was prepared as follows.
【００３９】まず、目的のガラス組成になるように定め
られた量の原料粉末を秤量して混合し、白金製の坩堝に
入れ、電気炉中で１５５０℃で溶解した。原料が十分に
溶解した後、撹拌羽をガラス融液に挿入し約２時間撹拌
した。次に、撹拌羽を取り出し３０分間静置した後、測
定に必要な形状に成型、加工することで作製した。First, raw material powders in an amount determined to have a desired glass composition were weighed and mixed, put into a platinum crucible, and melted at 1550 ° C. in an electric furnace. After the raw materials were sufficiently dissolved, the stirring blade was inserted into the glass melt and stirred for about 2 hours. Next, the stirring blade was taken out and allowed to stand for 30 minutes, and then formed and processed into a shape required for measurement.
【００４０】得られた試料について、線熱膨張係数、作
業温度、アルカリ溶出量、及び耐紫外線ソラリゼーショ
ン性について評価した。The obtained sample was evaluated for its coefficient of linear thermal expansion, working temperature, amount of alkali elution, and resistance to ultraviolet solarization.
【００４１】なお各測定は、以下のように行った。線熱
膨張係数は外径３．５ｍｍ×長さ５０ｍｍの円柱状の試
料を作製し、ディラトメータで３０〜３８０℃間の平均
線熱膨張係数を測定した。ガラスの作業温度はストーク
スの法則に基づく白金球引き上げ法によって、ガラスの
粘度が１０4 ポイズの温度を求めた。環状や特殊形状の
蛍光ランプを作る際の熱加工はこの作業温度が目安にな
り、効率の良い加工や蛍光体を劣化させないためにはこ
の温度が低いほど好ましい。ガラスのアルカリ溶出量
は、ＪＩＳ−Ｒ３５０２にに基づく粉末法で、純水中に
溶出するアルカリ成分量を測定した。このアルカリ溶出
量が大きいと、蛍光体を変質させたり水銀と反応したり
するため、輝度劣化につながる。耐紫外線ソラリゼーシ
ョン性は次のようにして評価した。まず両面を鏡面研磨
した厚さ１ｍｍの試料を作製し、波長４００ｎｍの透過
率を測定した。続いて４０Ｗの低圧水銀ランプによって
主波長２５３．７ｎｍの紫外線を６０分間照射した後、
再度４００ｎｍの透過率を測定し、紫外線照射による透
過率の低下量を求め、ΔＴ％として示した。耐紫外線ソ
ラリゼーション性の劣るガラスほどこの透過率の低下量
が大きくなり、蛍光ランプの輝度劣化が著しくなる。Each measurement was performed as follows. As for the linear thermal expansion coefficient, a cylindrical sample having an outer diameter of 3.5 mm and a length of 50 mm was prepared, and the average linear thermal expansion coefficient between 30 and 380 ° C. was measured with a dilatometer. The working temperature of the glass was determined to be a temperature at which the viscosity of the glass was 10 4 poise by a platinum ball pulling method based on Stokes law. This working temperature is used as a guide for the thermal processing when producing an annular or specially shaped fluorescent lamp, and the lower the temperature is, the more preferable in order to achieve efficient processing and not to deteriorate the phosphor. The alkali elution amount of the glass was measured by a powder method based on JIS-R3502, by measuring the amount of an alkali component eluted in pure water. When the alkali elution amount is large, the phosphor is deteriorated or reacts with mercury, which leads to luminance degradation. The ultraviolet solarization resistance was evaluated as follows. First, a sample having a thickness of 1 mm was mirror-polished on both sides, and the transmittance at a wavelength of 400 nm was measured. Subsequently, ultraviolet rays having a main wavelength of 253.7 nm were irradiated with a 40 W low-pressure mercury lamp for 60 minutes,
The transmittance at 400 nm was measured again, and the amount of decrease in the transmittance due to the irradiation of ultraviolet rays was determined and indicated as ΔT%. The lower the transmittance of the glass, the lower the resistance to ultraviolet solarization, and the greater the decrease in transmittance, and the more the luminance of the fluorescent lamp deteriorates significantly.
【００４２】表から明らかなように、ＴｉＯ2 を必須成
分として含有する本発明の各試料は、Ｓｂ2Ｏ3 を実質
的に含まないガラスで有りながら、作業温度が９６９℃
以下、アルカリ溶出量が０．７９ｍｇ以下、耐紫外線ソ
ラリゼーション性についても透過率低下量が１．０％以
下であり、従来品である試料Ｎｏ．１５と同等以上の特
性を有することが分かった。As is clear from the table, each sample of the present invention containing TiO 2 as an essential component is a glass substantially containing no Sb 2 O 3 , but has a working temperature of 969 ° C.
Hereafter, the amount of alkali eluted is 0.79 mg or less, and the decrease in transmittance of ultraviolet solarization resistance is 1.0% or less. It turned out that it has the property equivalent to or more than 15.
【００４３】これに対して比較例であるＮｏ．１６の試
料は、線熱膨張係数がステムガラスと安全にシール可能
な９７．４×１０-7／℃であるが、作業温度が９８７℃
と高く、またアルカリ溶出量が０．８６ｍｇと多かっ
た。さらに耐紫外線ソラリゼーション性については、紫
外線照射による透過率低下量が９．３％と著しく悪かっ
た。On the other hand, the comparative example No. The 16 samples had a coefficient of linear thermal expansion of 97.4 × 10 −7 / ° C. that can be safely sealed with the stem glass, but the working temperature was 987 ° C.
And the alkali elution amount was as high as 0.86 mg. Further, with respect to the ultraviolet solarization resistance, the decrease in transmittance due to ultraviolet irradiation was extremely poor at 9.3%.
【００４４】次に試料Ｎｏ．５、８、１１、１５、及び
１６のガラスを用いて３０Ｗの環状蛍光ランプを作製し
た。続いて、初期輝度及び１０００時間点灯後の輝度
を、従来品である試料Ｎｏ．１４の初期輝度を１００％
としたときの相対値で示した。Next, the sample No. Using a glass of 5, 8, 11, 15, and 16, a 30 W annular fluorescent lamp was produced. Subsequently, the initial luminance and the luminance after lighting for 1000 hours were measured for Sample No. 100% initial brightness of 14
And the relative value when
【００４５】[0045]
【表４】 [Table 4]
【００４６】この結果、本発明の実施例であるＮｏ．
５、８、１１の蛍光ランプは、従来のガラスで作製した
蛍光ランプと同等以上の性能を示していた。As a result, in the embodiment of the present invention, No.
The fluorescent lamps 5, 8, and 11 exhibited performance equal to or higher than that of fluorescent lamps made of conventional glass.
【００４７】[0047]
【発明の効果】以上説明したように、本発明の蛍光ラン
プ用ガラスは、Ｓｂ2Ｏ3 を実質的に含有しないため、
バーナ加工時の黒化が全く発生しない。しかもＴｉＯ2
を含有することにより、ガラスのアルカリ溶出量を低減
し、紫外線着色を抑え、また加工温度を下げることがで
きる。As described above, since the glass for fluorescent lamps of the present invention does not substantially contain Sb 2 O 3 ,
Blackening during burner processing does not occur at all. Moreover, TiO 2
By containing, the amount of alkali eluted from the glass can be reduced, ultraviolet coloring can be suppressed, and the processing temperature can be lowered.
【００４８】また本発明の蛍光ランプ用ガラス管は、上
記特性を有するガラスからなるために、高輝度で輝度劣
化が少ない蛍光ランプを作製することができる。しかも
成形が容易であために、直管は勿論、熱加工による環状
や特殊形状の蛍光ランプ用外囲器として好適である。Further, since the glass tube for a fluorescent lamp of the present invention is made of glass having the above characteristics, it is possible to manufacture a fluorescent lamp with high luminance and little luminance deterioration. Moreover, since the molding is easy, it is suitable not only as a straight tube but also as an envelope for a fluorescent lamp having a ring shape or a special shape formed by thermal processing.
【００４９】また本発明の蛍光ランプは、Ｓｂ2Ｏ3 を
実質的に含有しないにも関わらず、高輝度で輝度劣化が
少ないものである。Further, the fluorescent lamp of the present invention has high luminance and little luminance deterioration despite substantially not containing Sb 2 O 3 .
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０３Ｃ 3/095 Ｃ０３Ｃ 3/095 Ｈ０１Ｊ 61/30 Ｈ０１Ｊ 61/30 Ｌ ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C03C 3/095 C03C 3/095 H01J 61/30 H01J 61/30 L
Claims (6)
あり、かつ、ＴｉＯ2含有量が０．０５〜１０重量％で
あることを特徴とする蛍光ランプ用ガラス。1. A glass for fluorescent lamps, wherein the content of Sb 2 O 3 is 0.1% by weight or less and the content of TiO 2 is 0.05 to 10% by weight.
々０．１重量％以下であることを特徴とする請求項１の
蛍光ランプ用ガラス。2. The glass for a fluorescent lamp according to claim 1, wherein the contents of PbO and As 2 O 3 are each 0.1% by weight or less.
とする請求項１又は２の蛍光ランプ用ガラス。3. The fluorescent lamp glass according to claim 1, wherein the glass is made of soda lime glass.
％、Ａｌ2 Ｏ3 ０．５〜１０％、Ｂ2 Ｏ3 ０〜５％、
ＲＯ ３〜１７％（ＲはＣａ、Ｍｇ、Ｓｒ、Ｂａ、Ｚｎ
を表す）、Ｒ’2Ｏ １０〜２２％（Ｒ’はＬｉ、Ｎ
ａ、Ｋを表す）、ＺｒＯ2 ０〜５％、ＣｅＯ2 ０〜２
％、Ｆｅ2 Ｏ3 ０〜０．４％、Ｐ2 Ｏ5 ０〜１％、Ｔ
ｉＯ2 ０．０５〜１０％からなることを特徴とする請求
項１〜３の蛍光ランプ用ガラス。4. The composition according to claim 1, wherein said SiO 2 is 60 to 75% by weight.
%, Al 2 O 3 0.5 to 10%, B 2 O 3 0 to 5%,
RO 3 to 17% (R is Ca, Mg, Sr, Ba, Zn
The represented), R '2 O 10~22% (R' is Li, N
a, K), ZrO 2 0-5%, CeO 20 0-2
%, Fe 2 O 3 0~0.4% , P 2 O 5 0~1%, T
fluorescent lamp glass of claims 1 to 3, characterized in that it consists iO 2 0.05 to 10%.
あり、かつ、ＴｉＯ2含有量が０．０５〜１０重量％で
あるガラスからなることを特徴とする蛍光ランプ用ガラ
ス管。5. A glass tube for a fluorescent lamp, wherein the glass tube has a Sb 2 O 3 content of 0.1% by weight or less and a TiO 2 content of 0.05 to 10% by weight. .
あり、かつ、ＴｉＯ2含有量が０．０５〜１０重量％で
あるガラス管を外囲器として用いることを特徴とする蛍
光ランプ。6. A glass tube having an Sb 2 O 3 content of 0.1% by weight or less and a TiO 2 content of 0.05 to 10% by weight is used as an envelope. Fluorescent lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11339138A JP2000290038A (en) | 1999-02-01 | 1999-11-30 | Glass for fluorescent lamp, glass tube for fluorescent lamp and fluorescent lamp |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11-23770 | 1999-02-01 | ||
| JP2377099 | 1999-02-01 | ||
| JP11339138A JP2000290038A (en) | 1999-02-01 | 1999-11-30 | Glass for fluorescent lamp, glass tube for fluorescent lamp and fluorescent lamp |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006356125A Division JP2007131530A (en) | 1999-02-01 | 2006-12-28 | Glass for fluorescent lamp, glass tube for fluorescent lamp and fluorescent lamp |
| JP2007059505A Division JP2007161583A (en) | 1999-02-01 | 2007-03-09 | Glass for fluorescent lamp, glass tube for fluorescent lamp and fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000290038A true JP2000290038A (en) | 2000-10-17 |
Family
ID=26361181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11339138A Pending JP2000290038A (en) | 1999-02-01 | 1999-11-30 | Glass for fluorescent lamp, glass tube for fluorescent lamp and fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000290038A (en) |
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| 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 |
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| JP2002293569A (en) * | 2001-04-04 | 2002-10-09 | Nippon Electric Glass Co Ltd | Glass for electric lamp |
| JP2002308644A (en) * | 2001-04-04 | 2002-10-23 | Nippon Electric Glass Co Ltd | Glass for electric lamp |
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| 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 |
| JP4756429B2 (en) * | 2001-04-04 | 2011-08-24 | 日本電気硝子株式会社 | Compact fluorescent lamp glass and manufacturing method thereof. |
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| JP4756430B2 (en) * | 2001-04-04 | 2011-08-24 | 日本電気硝子株式会社 | Glass for electric lamp and manufacturing method thereof |
| JP2002293570A (en) * | 2001-04-04 | 2002-10-09 | Nippon Electric Glass Co Ltd | Glass for electric lamp |
| JP2002308644A (en) * | 2001-04-04 | 2002-10-23 | Nippon Electric Glass Co Ltd | Glass for electric lamp |
| JP2003073142A (en) * | 2001-09-04 | 2003-03-12 | Asahi Techno Glass Corp | Glass composition for illumination |
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